Based on kernel version 4.7.2. Page generated on 2016-08-22 22:44 EST.
1 <section id="frontend-properties"> 2 <title>DVB Frontend properties</title> 3 <para>Tuning into a Digital TV physical channel and starting decoding it 4 requires changing a set of parameters, in order to control the 5 tuner, the demodulator, the Linear Low-noise Amplifier (LNA) and to set the 6 antenna subsystem via Satellite Equipment Control (SEC), on satellite 7 systems. The actual parameters are specific to each particular digital 8 TV standards, and may change as the digital TV specs evolves.</para> 9 <para>In the past, the strategy used was to have a union with the parameters 10 needed to tune for DVB-S, DVB-C, DVB-T and ATSC delivery systems grouped 11 there. The problem is that, as the second generation standards appeared, 12 those structs were not big enough to contain the additional parameters. 13 Also, the union didn't have any space left to be expanded without breaking 14 userspace. So, the decision was to deprecate the legacy union/struct based 15 approach, in favor of a properties set approach.</para> 16 17 <para>NOTE: on Linux DVB API version 3, setting a frontend were done via 18 <link linkend="dvb-frontend-parameters">struct <constant>dvb_frontend_parameters</constant></link>. 19 This got replaced on version 5 (also called "S2API", as this API were 20 added originally_enabled to provide support for DVB-S2), because the old 21 API has a very limited support to new standards and new hardware. This 22 section describes the new and recommended way to set the frontend, with 23 suppports all digital TV delivery systems.</para> 24 25 <para>Example: with the properties based approach, in order to set the tuner 26 to a DVB-C channel at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol 27 rate of 5.217 Mbauds, those properties should be sent to 28 <link linkend="FE_GET_PROPERTY"><constant>FE_SET_PROPERTY</constant></link> ioctl:</para> 29 <itemizedlist> 30 <listitem><para>&DTV-DELIVERY-SYSTEM; = SYS_DVBC_ANNEX_A</para></listitem> 31 <listitem><para>&DTV-FREQUENCY; = 651000000</para></listitem> 32 <listitem><para>&DTV-MODULATION; = QAM_256</para></listitem> 33 <listitem><para>&DTV-INVERSION; = INVERSION_AUTO</para></listitem> 34 <listitem><para>&DTV-SYMBOL-RATE; = 5217000</para></listitem> 35 <listitem><para>&DTV-INNER-FEC; = FEC_3_4</para></listitem> 36 <listitem><para>&DTV-TUNE;</para></listitem> 37 </itemizedlist> 38 39 <para>The code that would do the above is:</para> 40 <programlisting> 41 #include <stdio.h> 42 #include <fcntl.h> 43 #include <sys/ioctl.h> 44 #include <linux/dvb/frontend.h> 45 46 static struct dtv_property props[] = { 47 { .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A }, 48 { .cmd = DTV_FREQUENCY, .u.data = 651000000 }, 49 { .cmd = DTV_MODULATION, .u.data = QAM_256 }, 50 { .cmd = DTV_INVERSION, .u.data = INVERSION_AUTO }, 51 { .cmd = DTV_SYMBOL_RATE, .u.data = 5217000 }, 52 { .cmd = DTV_INNER_FEC, .u.data = FEC_3_4 }, 53 { .cmd = DTV_TUNE } 54 }; 55 56 static struct dtv_properties dtv_prop = { 57 .num = 6, .props = props 58 }; 59 60 int main(void) 61 { 62 int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR); 63 64 if (!fd) { 65 perror ("open"); 66 return -1; 67 } 68 if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) { 69 perror("ioctl"); 70 return -1; 71 } 72 printf("Frontend set\n"); 73 return 0; 74 } 75 </programlisting> 76 77 <para>NOTE: While it is possible to directly call the Kernel code like the 78 above example, it is strongly recommended to use 79 <ulink url="https://linuxtv.org/docs/libdvbv5/index.html">libdvbv5</ulink>, 80 as it provides abstraction to work with the supported digital TV standards 81 and provides methods for usual operations like program scanning and to 82 read/write channel descriptor files.</para> 83 84 <section id="dtv-stats"> 85 <title>struct <structname>dtv_stats</structname></title> 86 <programlisting> 87 struct dtv_stats { 88 __u8 scale; /* enum fecap_scale_params type */ 89 union { 90 __u64 uvalue; /* for counters and relative scales */ 91 __s64 svalue; /* for 1/1000 dB measures */ 92 }; 93 } __packed; 94 </programlisting> 95 </section> 96 <section id="dtv-fe-stats"> 97 <title>struct <structname>dtv_fe_stats</structname></title> 98 <programlisting> 99 #define MAX_DTV_STATS 4 100 101 struct dtv_fe_stats { 102 __u8 len; 103 &dtv-stats; stat[MAX_DTV_STATS]; 104 } __packed; 105 </programlisting> 106 </section> 107 108 <section id="dtv-property"> 109 <title>struct <structname>dtv_property</structname></title> 110 <programlisting> 111 /* Reserved fields should be set to 0 */ 112 113 struct dtv_property { 114 __u32 cmd; 115 __u32 reserved[3]; 116 union { 117 __u32 data; 118 &dtv-fe-stats; st; 119 struct { 120 __u8 data[32]; 121 __u32 len; 122 __u32 reserved1[3]; 123 void *reserved2; 124 } buffer; 125 } u; 126 int result; 127 } __attribute__ ((packed)); 128 129 /* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */ 130 #define DTV_IOCTL_MAX_MSGS 64 131 </programlisting> 132 </section> 133 <section id="dtv-properties"> 134 <title>struct <structname>dtv_properties</structname></title> 135 <programlisting> 136 struct dtv_properties { 137 __u32 num; 138 &dtv-property; *props; 139 }; 140 </programlisting> 141 </section> 142 143 <section> 144 <title>Property types</title> 145 <para> 146 On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY and FE_SET_PROPERTY</link>, 147 the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to 148 get/set up to 64 properties. The actual meaning of each property is described on the next sections. 149 </para> 150 151 <para>The available frontend property types are shown on the next section.</para> 152 </section> 153 154 <section id="fe_property_parameters"> 155 <title>Digital TV property parameters</title> 156 <section id="DTV-UNDEFINED"> 157 <title><constant>DTV_UNDEFINED</constant></title> 158 <para>Used internally. A GET/SET operation for it won't change or return anything.</para> 159 </section> 160 <section id="DTV-TUNE"> 161 <title><constant>DTV_TUNE</constant></title> 162 <para>Interpret the cache of data, build either a traditional frontend tunerequest so we can pass validation in the <constant>FE_SET_FRONTEND</constant> ioctl.</para> 163 </section> 164 <section id="DTV-CLEAR"> 165 <title><constant>DTV_CLEAR</constant></title> 166 <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para> 167 </section> 168 <section id="DTV-FREQUENCY"> 169 <title><constant>DTV_FREQUENCY</constant></title> 170 171 <para>Central frequency of the channel.</para> 172 173 <para>Notes:</para> 174 <para>1)For satellite delivery systems, it is measured in kHz. 175 For the other ones, it is measured in Hz.</para> 176 <para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz. 177 E.g. a valid frequency could be 474143 kHz. The stepping is bound to the bandwidth of 178 the channel which is 6MHz.</para> 179 180 <para>3)As in ISDB-Tsb the channel consists of only one or three segments the 181 frequency step is 429kHz, 3*429 respectively. As for ISDB-T the 182 central frequency of the channel is expected.</para> 183 </section> 184 <section id="DTV-MODULATION"> 185 <title><constant>DTV_MODULATION</constant></title> 186 <para>Specifies the frontend modulation type for delivery systems that supports 187 more than one modulation type. The modulation can be one of the types 188 defined by &fe-modulation;.</para> 189 190 191 <section id="fe-modulation-t"> 192 <title>Modulation property</title> 193 194 <para>Most of the digital TV standards currently offers more than one possible 195 modulation (sometimes called as "constellation" on some standards). This 196 enum contains the values used by the Kernel. Please note that not all 197 modulations are supported by a given standard.</para> 198 199 <table pgwide="1" frame="none" id="fe-modulation"> 200 <title>enum fe_modulation</title> 201 <tgroup cols="2"> 202 &cs-def; 203 <thead> 204 <row> 205 <entry>ID</entry> 206 <entry>Description</entry> 207 </row> 208 </thead> 209 <tbody valign="top"> 210 <row> 211 <entry id="QPSK"><constant>QPSK</constant></entry> 212 <entry>QPSK modulation</entry> 213 </row><row> 214 <entry id="QAM-16"><constant>QAM_16</constant></entry> 215 <entry>16-QAM modulation</entry> 216 </row><row> 217 <entry id="QAM-32"><constant>QAM_32</constant></entry> 218 <entry>32-QAM modulation</entry> 219 </row><row> 220 <entry id="QAM-64"><constant>QAM_64</constant></entry> 221 <entry>64-QAM modulation</entry> 222 </row><row> 223 <entry id="QAM-128"><constant>QAM_128</constant></entry> 224 <entry>128-QAM modulation</entry> 225 </row><row> 226 <entry id="QAM-256"><constant>QAM_256</constant></entry> 227 <entry>256-QAM modulation</entry> 228 </row><row> 229 <entry id="QAM-AUTO"><constant>QAM_AUTO</constant></entry> 230 <entry>Autodetect QAM modulation</entry> 231 </row><row> 232 <entry id="VSB-8"><constant>VSB_8</constant></entry> 233 <entry>8-VSB modulation</entry> 234 </row><row> 235 <entry id="VSB-16"><constant>VSB_16</constant></entry> 236 <entry>16-VSB modulation</entry> 237 </row><row> 238 <entry id="PSK-8"><constant>PSK_8</constant></entry> 239 <entry>8-PSK modulation</entry> 240 </row><row> 241 <entry id="APSK-16"><constant>APSK_16</constant></entry> 242 <entry>16-APSK modulation</entry> 243 </row><row> 244 <entry id="APSK-32"><constant>APSK_32</constant></entry> 245 <entry>32-APSK modulation</entry> 246 </row><row> 247 <entry id="DQPSK"><constant>DQPSK</constant></entry> 248 <entry>DQPSK modulation</entry> 249 </row><row> 250 <entry id="QAM-4-NR"><constant>QAM_4_NR</constant></entry> 251 <entry>4-QAM-NR modulation</entry> 252 </row> 253 </tbody> 254 </tgroup> 255 </table> 256 </section> 257 258 </section> 259 <section id="DTV-BANDWIDTH-HZ"> 260 <title><constant>DTV_BANDWIDTH_HZ</constant></title> 261 262 <para>Bandwidth for the channel, in HZ.</para> 263 264 <para>Possible values: 265 <constant>1712000</constant>, 266 <constant>5000000</constant>, 267 <constant>6000000</constant>, 268 <constant>7000000</constant>, 269 <constant>8000000</constant>, 270 <constant>10000000</constant>. 271 </para> 272 273 <para>Notes:</para> 274 275 <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para> 276 <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para> 277 <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth 278 for DVB-C depends on the symbol rate</para> 279 <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from 280 other parameters (DTV_ISDBT_SB_SEGMENT_IDX, 281 DTV_ISDBT_SB_SEGMENT_COUNT).</para> 282 <para>5) DVB-T supports 6, 7 and 8MHz.</para> 283 <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para> 284 </section> 285 <section id="DTV-INVERSION"> 286 <title><constant>DTV_INVERSION</constant></title> 287 288 <para>Specifies if the frontend should do spectral inversion or not.</para> 289 290 <section id="fe-spectral-inversion-t"> 291 <title>enum fe_modulation: Frontend spectral inversion</title> 292 293 <para>This parameter indicates if spectral inversion should be presumed or not. 294 In the automatic setting (<constant>INVERSION_AUTO</constant>) the hardware 295 will try to figure out the correct setting by itself. If the hardware 296 doesn't support, the DVB core will try to lock at the carrier first with 297 inversion off. If it fails, it will try to enable inversion. 298 </para> 299 300 <table pgwide="1" frame="none" id="fe-spectral-inversion"> 301 <title>enum fe_modulation</title> 302 <tgroup cols="2"> 303 &cs-def; 304 <thead> 305 <row> 306 <entry>ID</entry> 307 <entry>Description</entry> 308 </row> 309 </thead> 310 <tbody valign="top"> 311 <row> 312 <entry id="INVERSION-OFF"><constant>INVERSION_OFF</constant></entry> 313 <entry>Don't do spectral band inversion.</entry> 314 </row><row> 315 <entry id="INVERSION-ON"><constant>INVERSION_ON</constant></entry> 316 <entry>Do spectral band inversion.</entry> 317 </row><row> 318 <entry id="INVERSION-AUTO"><constant>INVERSION_AUTO</constant></entry> 319 <entry>Autodetect spectral band inversion.</entry> 320 </row> 321 </tbody> 322 </tgroup> 323 </table> 324 </section> 325 326 </section> 327 <section id="DTV-DISEQC-MASTER"> 328 <title><constant>DTV_DISEQC_MASTER</constant></title> 329 <para>Currently not implemented.</para> 330 </section> 331 <section id="DTV-SYMBOL-RATE"> 332 <title><constant>DTV_SYMBOL_RATE</constant></title> 333 <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para> 334 </section> 335 <section id="DTV-INNER-FEC"> 336 <title><constant>DTV_INNER_FEC</constant></title> 337 <para>Used cable/satellite transmissions. The acceptable values are: 338 </para> 339 <section id="fe-code-rate-t"> 340 <title>enum fe_code_rate: type of the Forward Error Correction.</title> 341 342 <table pgwide="1" frame="none" id="fe-code-rate"> 343 <title>enum fe_code_rate</title> 344 <tgroup cols="2"> 345 &cs-def; 346 <thead> 347 <row> 348 <entry>ID</entry> 349 <entry>Description</entry> 350 </row> 351 </thead> 352 <tbody valign="top"> 353 <row> 354 <entry id="FEC-NONE"><constant>FEC_NONE</constant></entry> 355 <entry>No Forward Error Correction Code</entry> 356 </row><row> 357 <entry id="FEC-AUTO"><constant>FEC_AUTO</constant></entry> 358 <entry>Autodetect Error Correction Code</entry> 359 </row><row> 360 <entry id="FEC-1-2"><constant>FEC_1_2</constant></entry> 361 <entry>Forward Error Correction Code 1/2</entry> 362 </row><row> 363 <entry id="FEC-2-3"><constant>FEC_2_3</constant></entry> 364 <entry>Forward Error Correction Code 2/3</entry> 365 </row><row> 366 <entry id="FEC-3-4"><constant>FEC_3_4</constant></entry> 367 <entry>Forward Error Correction Code 3/4</entry> 368 </row><row> 369 <entry id="FEC-4-5"><constant>FEC_4_5</constant></entry> 370 <entry>Forward Error Correction Code 4/5</entry> 371 </row><row> 372 <entry id="FEC-5-6"><constant>FEC_5_6</constant></entry> 373 <entry>Forward Error Correction Code 5/6</entry> 374 </row><row> 375 <entry id="FEC-6-7"><constant>FEC_6_7</constant></entry> 376 <entry>Forward Error Correction Code 6/7</entry> 377 </row><row> 378 <entry id="FEC-7-8"><constant>FEC_7_8</constant></entry> 379 <entry>Forward Error Correction Code 7/8</entry> 380 </row><row> 381 <entry id="FEC-8-9"><constant>FEC_8_9</constant></entry> 382 <entry>Forward Error Correction Code 8/9</entry> 383 </row><row> 384 <entry id="FEC-9-10"><constant>FEC_9_10</constant></entry> 385 <entry>Forward Error Correction Code 9/10</entry> 386 </row><row> 387 <entry id="FEC-2-5"><constant>FEC_2_5</constant></entry> 388 <entry>Forward Error Correction Code 2/5</entry> 389 </row><row> 390 <entry id="FEC-3-5"><constant>FEC_3_5</constant></entry> 391 <entry>Forward Error Correction Code 3/5</entry> 392 </row> 393 </tbody> 394 </tgroup> 395 </table> 396 </section> 397 </section> 398 <section id="DTV-VOLTAGE"> 399 <title><constant>DTV_VOLTAGE</constant></title> 400 <para>The voltage is usually used with non-DiSEqC capable LNBs to switch 401 the polarzation (horizontal/vertical). When using DiSEqC epuipment this 402 voltage has to be switched consistently to the DiSEqC commands as 403 described in the DiSEqC spec.</para> 404 405 <table pgwide="1" frame="none" id="fe-sec-voltage"> 406 <title id="fe-sec-voltage-t">enum fe_sec_voltage</title> 407 <tgroup cols="2"> 408 &cs-def; 409 <thead> 410 <row> 411 <entry>ID</entry> 412 <entry>Description</entry> 413 </row> 414 </thead> 415 <tbody valign="top"> 416 <row> 417 <entry align="char" id="SEC-VOLTAGE-13"><constant>SEC_VOLTAGE_13</constant></entry> 418 <entry align="char">Set DC voltage level to 13V</entry> 419 </row><row> 420 <entry align="char" id="SEC-VOLTAGE-18"><constant>SEC_VOLTAGE_18</constant></entry> 421 <entry align="char">Set DC voltage level to 18V</entry> 422 </row><row> 423 <entry align="char" id="SEC-VOLTAGE-OFF"><constant>SEC_VOLTAGE_OFF</constant></entry> 424 <entry align="char">Don't send any voltage to the antenna</entry> 425 </row> 426 </tbody> 427 </tgroup> 428 </table> 429 </section> 430 <section id="DTV-TONE"> 431 <title><constant>DTV_TONE</constant></title> 432 <para>Currently not used.</para> 433 </section> 434 <section id="DTV-PILOT"> 435 <title><constant>DTV_PILOT</constant></title> 436 <para>Sets DVB-S2 pilot</para> 437 <section id="fe-pilot-t"> 438 <title>fe_pilot type</title> 439 <table pgwide="1" frame="none" id="fe-pilot"> 440 <title>enum fe_pilot</title> 441 <tgroup cols="2"> 442 &cs-def; 443 <thead> 444 <row> 445 <entry>ID</entry> 446 <entry>Description</entry> 447 </row> 448 </thead> 449 <tbody valign="top"> 450 <row> 451 <entry align="char" id="PILOT-ON"><constant>PILOT_ON</constant></entry> 452 <entry align="char">Pilot tones enabled</entry> 453 </row><row> 454 <entry align="char" id="PILOT-OFF"><constant>PILOT_OFF</constant></entry> 455 <entry align="char">Pilot tones disabled</entry> 456 </row><row> 457 <entry align="char" id="PILOT-AUTO"><constant>PILOT_AUTO</constant></entry> 458 <entry align="char">Autodetect pilot tones</entry> 459 </row> 460 </tbody> 461 </tgroup> 462 </table> 463 </section> 464 </section> 465 <section id="DTV-ROLLOFF"> 466 <title><constant>DTV_ROLLOFF</constant></title> 467 <para>Sets DVB-S2 rolloff</para> 468 469 <section id="fe-rolloff-t"> 470 <title>fe_rolloff type</title> 471 <table pgwide="1" frame="none" id="fe-rolloff"> 472 <title>enum fe_rolloff</title> 473 <tgroup cols="2"> 474 &cs-def; 475 <thead> 476 <row> 477 <entry>ID</entry> 478 <entry>Description</entry> 479 </row> 480 </thead> 481 <tbody valign="top"> 482 <row> 483 <entry align="char" id="ROLLOFF-35"><constant>ROLLOFF_35</constant></entry> 484 <entry align="char">Roloff factor: α=35%</entry> 485 </row><row> 486 <entry align="char" id="ROLLOFF-20"><constant>ROLLOFF_20</constant></entry> 487 <entry align="char">Roloff factor: α=20%</entry> 488 </row><row> 489 <entry align="char" id="ROLLOFF-25"><constant>ROLLOFF_25</constant></entry> 490 <entry align="char">Roloff factor: α=25%</entry> 491 </row><row> 492 <entry align="char" id="ROLLOFF-AUTO"><constant>ROLLOFF_AUTO</constant></entry> 493 <entry align="char">Auto-detect the roloff factor.</entry> 494 </row> 495 </tbody> 496 </tgroup> 497 </table> 498 </section> 499 </section> 500 <section id="DTV-DISEQC-SLAVE-REPLY"> 501 <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title> 502 <para>Currently not implemented.</para> 503 </section> 504 <section id="DTV-FE-CAPABILITY-COUNT"> 505 <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title> 506 <para>Currently not implemented.</para> 507 </section> 508 <section id="DTV-FE-CAPABILITY"> 509 <title><constant>DTV_FE_CAPABILITY</constant></title> 510 <para>Currently not implemented.</para> 511 </section> 512 <section id="DTV-DELIVERY-SYSTEM"> 513 <title><constant>DTV_DELIVERY_SYSTEM</constant></title> 514 <para>Specifies the type of Delivery system</para> 515 <section id="fe-delivery-system-t"> 516 <title>fe_delivery_system type</title> 517 <para>Possible values: </para> 518 519 <table pgwide="1" frame="none" id="fe-delivery-system"> 520 <title>enum fe_delivery_system</title> 521 <tgroup cols="2"> 522 &cs-def; 523 <thead> 524 <row> 525 <entry>ID</entry> 526 <entry>Description</entry> 527 </row> 528 </thead> 529 <tbody valign="top"> 530 <row> 531 <entry id="SYS-UNDEFINED"><constant>SYS_UNDEFINED</constant></entry> 532 <entry>Undefined standard. Generally, indicates an error</entry> 533 </row><row> 534 <entry id="SYS-DVBC-ANNEX-A"><constant>SYS_DVBC_ANNEX_A</constant></entry> 535 <entry>Cable TV: DVB-C following ITU-T J.83 Annex A spec</entry> 536 </row><row> 537 <entry id="SYS-DVBC-ANNEX-B"><constant>SYS_DVBC_ANNEX_B</constant></entry> 538 <entry>Cable TV: DVB-C following ITU-T J.83 Annex B spec (ClearQAM)</entry> 539 </row><row> 540 <entry id="SYS-DVBC-ANNEX-C"><constant>SYS_DVBC_ANNEX_C</constant></entry> 541 <entry>Cable TV: DVB-C following ITU-T J.83 Annex C spec</entry> 542 </row><row> 543 <entry id="SYS-ISDBC"><constant>SYS_ISDBC</constant></entry> 544 <entry>Cable TV: ISDB-C (no drivers yet)</entry> 545 </row><row> 546 <entry id="SYS-DVBT"><constant>SYS_DVBT</constant></entry> 547 <entry>Terrestral TV: DVB-T</entry> 548 </row><row> 549 <entry id="SYS-DVBT2"><constant>SYS_DVBT2</constant></entry> 550 <entry>Terrestral TV: DVB-T2</entry> 551 </row><row> 552 <entry id="SYS-ISDBT"><constant>SYS_ISDBT</constant></entry> 553 <entry>Terrestral TV: ISDB-T</entry> 554 </row><row> 555 <entry id="SYS-ATSC"><constant>SYS_ATSC</constant></entry> 556 <entry>Terrestral TV: ATSC</entry> 557 </row><row> 558 <entry id="SYS-ATSCMH"><constant>SYS_ATSCMH</constant></entry> 559 <entry>Terrestral TV (mobile): ATSC-M/H</entry> 560 </row><row> 561 <entry id="SYS-DTMB"><constant>SYS_DTMB</constant></entry> 562 <entry>Terrestrial TV: DTMB</entry> 563 </row><row> 564 <entry id="SYS-DVBS"><constant>SYS_DVBS</constant></entry> 565 <entry>Satellite TV: DVB-S</entry> 566 </row><row> 567 <entry id="SYS-DVBS2"><constant>SYS_DVBS2</constant></entry> 568 <entry>Satellite TV: DVB-S2</entry> 569 </row><row> 570 <entry id="SYS-TURBO"><constant>SYS_TURBO</constant></entry> 571 <entry>Satellite TV: DVB-S Turbo</entry> 572 </row><row> 573 <entry id="SYS-ISDBS"><constant>SYS_ISDBS</constant></entry> 574 <entry>Satellite TV: ISDB-S</entry> 575 </row><row> 576 <entry id="SYS-DAB"><constant>SYS_DAB</constant></entry> 577 <entry>Digital audio: DAB (not fully supported)</entry> 578 </row><row> 579 <entry id="SYS-DSS"><constant>SYS_DSS</constant></entry> 580 <entry>Satellite TV:"DSS (not fully supported)</entry> 581 </row><row> 582 <entry id="SYS-CMMB"><constant>SYS_CMMB</constant></entry> 583 <entry>Terrestral TV (mobile):CMMB (not fully supported)</entry> 584 </row><row> 585 <entry id="SYS-DVBH"><constant>SYS_DVBH</constant></entry> 586 <entry>Terrestral TV (mobile): DVB-H (standard deprecated)</entry> 587 </row> 588 </tbody> 589 </tgroup> 590 </table> 591 592 593 </section> 594 </section> 595 <section id="DTV-ISDBT-PARTIAL-RECEPTION"> 596 <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title> 597 598 <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether 599 the channel is in partial reception mode or not.</para> 600 601 <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and 602 <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para> 603 604 <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1' 605 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel 606 is consisting of one segment and layer or three segments and two layers.</para> 607 608 <para>Possible values: 0, 1, -1 (AUTO)</para> 609 </section> 610 <section id="DTV-ISDBT-SOUND-BROADCASTING"> 611 <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title> 612 613 <para>This field represents whether the other DTV_ISDBT_*-parameters are 614 referring to an ISDB-T and an ISDB-Tsb channel. (See also 615 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para> 616 617 <para>Possible values: 0, 1, -1 (AUTO)</para> 618 </section> 619 <section id="DTV-ISDBT-SB-SUBCHANNEL-ID"> 620 <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title> 621 622 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 623 624 <para>(Note of the author: This might not be the correct description of the 625 <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical 626 background needed to program a device)</para> 627 628 <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a 629 set of connected ISDB-Tsb channels. In this set of channels every 630 channel can be received independently. The number of connected 631 ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum 632 bandwidth available.</para> 633 634 <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The 635 broadcaster has several possibilities to put those channels in the 636 air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8 637 segments from position 1-8 to 5-13 or anything in between.</para> 638 639 <para>The underlying layer of segments are subchannels: each segment is 640 consisting of several subchannels with a predefined IDs. A sub-channel 641 is used to help the demodulator to synchronize on the channel.</para> 642 643 <para>An ISDB-T channel is always centered over all sub-channels. As for 644 the example above, in ISDB-Tsb it is no longer as simple as that.</para> 645 646 <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the 647 sub-channel ID of the segment to be demodulated.</para> 648 649 <para>Possible values: 0 .. 41, -1 (AUTO)</para> 650 </section> 651 <section id="DTV-ISDBT-SB-SEGMENT-IDX"> 652 <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title> 653 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 654 <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be 655 demodulated for an ISDB-Tsb channel where several of them are 656 transmitted in the connected manner.</para> 657 <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para> 658 <para>Note: This value cannot be determined by an automatic channel search.</para> 659 </section> 660 <section id="DTV-ISDBT-SB-SEGMENT-COUNT"> 661 <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title> 662 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para> 663 <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb 664 channels.</para> 665 <para>Possible values: 1 .. 13</para> 666 <para>Note: This value cannot be determined by an automatic channel search.</para> 667 </section> 668 <section id="isdb-hierq-layers"> 669 <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title> 670 <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in 671 ISDB-T hierarchical layers can be decoded simultaneously. For that 672 reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders.</para> 673 <para>ISDB-T has 3 hierarchical layers which each can use a part of the 674 available segments. The total number of segments over all layers has 675 to 13 in ISDB-T.</para> 676 <para>There are 3 parameter sets, for Layers A, B and C.</para> 677 <section id="DTV-ISDBT-LAYER-ENABLED"> 678 <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title> 679 <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling 680 layers in the decoding process. Setting all bits of 681 <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be 682 demodulated. This is the default.</para> 683 <para>If the channel is in the partial reception mode 684 (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded 685 independently of the other 12 segments. In that mode layer A has to 686 have a <constant>SEGMENT_COUNT</constant> of 1.</para> 687 <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb 688 according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled 689 accordingly.</para> 690 <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para> 691 <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para> 692 <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para> 693 <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para> 694 <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para> 695 </section> 696 <section id="DTV-ISDBT-LAYER-FEC"> 697 <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title> 698 <para>Possible values: <constant>FEC_AUTO</constant>, <constant>FEC_1_2</constant>, <constant>FEC_2_3</constant>, <constant>FEC_3_4</constant>, <constant>FEC_5_6</constant>, <constant>FEC_7_8</constant></para> 699 </section> 700 <section id="DTV-ISDBT-LAYER-MODULATION"> 701 <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title> 702 <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para> 703 <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant> 704 and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para> 705 </section> 706 <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT"> 707 <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title> 708 <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para> 709 <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and 710 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para> 711 <informaltable id="isdbt-layer_seg-cnt-table"> 712 <tgroup cols="6"> 713 <tbody> 714 <row> 715 <entry>PR</entry> 716 <entry>SB</entry> 717 <entry>Layer A width</entry> 718 <entry>Layer B width</entry> 719 <entry>Layer C width</entry> 720 <entry>total width</entry> 721 </row> 722 <row> 723 <entry>0</entry> 724 <entry>0</entry> 725 <entry>1 .. 13</entry> 726 <entry>1 .. 13</entry> 727 <entry>1 .. 13</entry> 728 <entry>13</entry> 729 </row> 730 <row> 731 <entry>1</entry> 732 <entry>0</entry> 733 <entry>1</entry> 734 <entry>1 .. 13</entry> 735 <entry>1 .. 13</entry> 736 <entry>13</entry> 737 </row> 738 <row> 739 <entry>0</entry> 740 <entry>1</entry> 741 <entry>1</entry> 742 <entry>0</entry> 743 <entry>0</entry> 744 <entry>1</entry> 745 </row> 746 <row> 747 <entry>1</entry> 748 <entry>1</entry> 749 <entry>1</entry> 750 <entry>2</entry> 751 <entry>0</entry> 752 <entry>13</entry> 753 </row> 754 </tbody> 755 </tgroup> 756 </informaltable> 757 </section> 758 <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING"> 759 <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title> 760 <para>Valid values: 0, 1, 2, 4, -1 (AUTO)</para> 761 <para>when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid.</para> 762 <para>Note: The real time interleaving length depends on the mode (fft-size). The values 763 here are referring to what can be found in the TMCC-structure, as shown in the table below.</para> 764 <informaltable id="isdbt-layer-interleaving-table"> 765 <tgroup cols="4" align="center"> 766 <tbody> 767 <row> 768 <entry>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</entry> 769 <entry>Mode 1 (2K FFT)</entry> 770 <entry>Mode 2 (4K FFT)</entry> 771 <entry>Mode 3 (8K FFT)</entry> 772 </row> 773 <row> 774 <entry>0</entry> 775 <entry>0</entry> 776 <entry>0</entry> 777 <entry>0</entry> 778 </row> 779 <row> 780 <entry>1</entry> 781 <entry>4</entry> 782 <entry>2</entry> 783 <entry>1</entry> 784 </row> 785 <row> 786 <entry>2</entry> 787 <entry>8</entry> 788 <entry>4</entry> 789 <entry>2</entry> 790 </row> 791 <row> 792 <entry>4</entry> 793 <entry>16</entry> 794 <entry>8</entry> 795 <entry>4</entry> 796 </row> 797 </tbody> 798 </tgroup> 799 </informaltable> 800 </section> 801 <section id="DTV-ATSCMH-FIC-VER"> 802 <title><constant>DTV_ATSCMH_FIC_VER</constant></title> 803 <para>Version number of the FIC (Fast Information Channel) signaling data.</para> 804 <para>FIC is used for relaying information to allow rapid service acquisition by the receiver.</para> 805 <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> 806 </section> 807 <section id="DTV-ATSCMH-PARADE-ID"> 808 <title><constant>DTV_ATSCMH_PARADE_ID</constant></title> 809 <para>Parade identification number</para> 810 <para>A parade is a collection of up to eight MH groups, conveying one or two ensembles.</para> 811 <para>Possible values: 0, 1, 2, 3, ..., 126, 127</para> 812 </section> 813 <section id="DTV-ATSCMH-NOG"> 814 <title><constant>DTV_ATSCMH_NOG</constant></title> 815 <para>Number of MH groups per MH subframe for a designated parade.</para> 816 <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> 817 </section> 818 <section id="DTV-ATSCMH-TNOG"> 819 <title><constant>DTV_ATSCMH_TNOG</constant></title> 820 <para>Total number of MH groups including all MH groups belonging to all MH parades in one MH subframe.</para> 821 <para>Possible values: 0, 1, 2, 3, ..., 30, 31</para> 822 </section> 823 <section id="DTV-ATSCMH-SGN"> 824 <title><constant>DTV_ATSCMH_SGN</constant></title> 825 <para>Start group number.</para> 826 <para>Possible values: 0, 1, 2, 3, ..., 14, 15</para> 827 </section> 828 <section id="DTV-ATSCMH-PRC"> 829 <title><constant>DTV_ATSCMH_PRC</constant></title> 830 <para>Parade repetition cycle.</para> 831 <para>Possible values: 1, 2, 3, 4, 5, 6, 7, 8</para> 832 </section> 833 <section id="DTV-ATSCMH-RS-FRAME-MODE"> 834 <title><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></title> 835 <para>Reed Solomon (RS) frame mode.</para> 836 <para>Possible values are:</para> 837 <table pgwide="1" frame="none" id="atscmh-rs-frame-mode"> 838 <title>enum atscmh_rs_frame_mode</title> 839 <tgroup cols="2"> 840 &cs-def; 841 <thead> 842 <row> 843 <entry>ID</entry> 844 <entry>Description</entry> 845 </row> 846 </thead> 847 <tbody valign="top"> 848 <row> 849 <entry id="ATSCMH-RSFRAME-PRI-ONLY"><constant>ATSCMH_RSFRAME_PRI_ONLY</constant></entry> 850 <entry>Single Frame: There is only a primary RS Frame for all 851 Group Regions.</entry> 852 </row><row> 853 <entry id="ATSCMH-RSFRAME-PRI-SEC"><constant>ATSCMH_RSFRAME_PRI_SEC</constant></entry> 854 <entry>Dual Frame: There are two separate RS Frames: Primary RS 855 Frame for Group Region A and B and Secondary RS Frame for Group 856 Region C and D.</entry> 857 </row> 858 </tbody> 859 </tgroup> 860 </table> 861 </section> 862 <section id="DTV-ATSCMH-RS-FRAME-ENSEMBLE"> 863 <title><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></title> 864 <para>Reed Solomon(RS) frame ensemble.</para> 865 <para>Possible values are:</para> 866 <table pgwide="1" frame="none" id="atscmh-rs-frame-ensemble"> 867 <title>enum atscmh_rs_frame_ensemble</title> 868 <tgroup cols="2"> 869 &cs-def; 870 <thead> 871 <row> 872 <entry>ID</entry> 873 <entry>Description</entry> 874 </row> 875 </thead> 876 <tbody valign="top"> 877 <row> 878 <entry id="ATSCMH-RSFRAME-ENS-PRI"><constant>ATSCMH_RSFRAME_ENS_PRI</constant></entry> 879 <entry>Primary Ensemble.</entry> 880 </row><row> 881 <entry id="ATSCMH-RSFRAME-ENS-SEC"><constant>AATSCMH_RSFRAME_PRI_SEC</constant></entry> 882 <entry>Secondary Ensemble.</entry> 883 </row><row> 884 <entry id="ATSCMH-RSFRAME-RES"><constant>AATSCMH_RSFRAME_RES</constant></entry> 885 <entry>Reserved. Shouldn't be used.</entry> 886 </row> 887 </tbody> 888 </tgroup> 889 </table> 890 </section> 891 <section id="DTV-ATSCMH-RS-CODE-MODE-PRI"> 892 <title><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></title> 893 <para>Reed Solomon (RS) code mode (primary).</para> 894 <para>Possible values are:</para> 895 <table pgwide="1" frame="none" id="atscmh-rs-code-mode"> 896 <title>enum atscmh_rs_code_mode</title> 897 <tgroup cols="2"> 898 &cs-def; 899 <thead> 900 <row> 901 <entry>ID</entry> 902 <entry>Description</entry> 903 </row> 904 </thead> 905 <tbody valign="top"> 906 <row> 907 <entry id="ATSCMH-RSCODE-211-187"><constant>ATSCMH_RSCODE_211_187</constant></entry> 908 <entry>Reed Solomon code (211,187).</entry> 909 </row><row> 910 <entry id="ATSCMH-RSCODE-223-187"><constant>ATSCMH_RSCODE_223_187</constant></entry> 911 <entry>Reed Solomon code (223,187).</entry> 912 </row><row> 913 <entry id="ATSCMH-RSCODE-235-187"><constant>ATSCMH_RSCODE_235_187</constant></entry> 914 <entry>Reed Solomon code (235,187).</entry> 915 </row><row> 916 <entry id="ATSCMH-RSCODE-RES"><constant>ATSCMH_RSCODE_RES</constant></entry> 917 <entry>Reserved. Shouldn't be used.</entry> 918 </row> 919 </tbody> 920 </tgroup> 921 </table> 922 </section> 923 <section id="DTV-ATSCMH-RS-CODE-MODE-SEC"> 924 <title><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></title> 925 <para>Reed Solomon (RS) code mode (secondary).</para> 926 <para>Possible values are the same as documented on 927 &atscmh-rs-code-mode;:</para> 928 </section> 929 <section id="DTV-ATSCMH-SCCC-BLOCK-MODE"> 930 <title><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></title> 931 <para>Series Concatenated Convolutional Code Block Mode.</para> 932 <para>Possible values are:</para> 933 <table pgwide="1" frame="none" id="atscmh-sccc-block-mode"> 934 <title>enum atscmh_scc_block_mode</title> 935 <tgroup cols="2"> 936 &cs-def; 937 <thead> 938 <row> 939 <entry>ID</entry> 940 <entry>Description</entry> 941 </row> 942 </thead> 943 <tbody valign="top"> 944 <row> 945 <entry id="ATSCMH-SCCC-BLK-SEP"><constant>ATSCMH_SCCC_BLK_SEP</constant></entry> 946 <entry>Separate SCCC: the SCCC outer code mode shall be set independently 947 for each Group Region (A, B, C, D)</entry> 948 </row><row> 949 <entry id="ATSCMH-SCCC-BLK-COMB"><constant>ATSCMH_SCCC_BLK_COMB</constant></entry> 950 <entry>Combined SCCC: all four Regions shall have the same SCCC outer 951 code mode.</entry> 952 </row><row> 953 <entry id="ATSCMH-SCCC-BLK-RES"><constant>ATSCMH_SCCC_BLK_RES</constant></entry> 954 <entry>Reserved. Shouldn't be used.</entry> 955 </row> 956 </tbody> 957 </tgroup> 958 </table> 959 </section> 960 <section id="DTV-ATSCMH-SCCC-CODE-MODE-A"> 961 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></title> 962 <para>Series Concatenated Convolutional Code Rate.</para> 963 <para>Possible values are:</para> 964 <table pgwide="1" frame="none" id="atscmh-sccc-code-mode"> 965 <title>enum atscmh_sccc_code_mode</title> 966 <tgroup cols="2"> 967 &cs-def; 968 <thead> 969 <row> 970 <entry>ID</entry> 971 <entry>Description</entry> 972 </row> 973 </thead> 974 <tbody valign="top"> 975 <row> 976 <entry id="ATSCMH-SCCC-CODE-HLF"><constant>ATSCMH_SCCC_CODE_HLF</constant></entry> 977 <entry>The outer code rate of a SCCC Block is 1/2 rate.</entry> 978 </row><row> 979 <entry id="ATSCMH-SCCC-CODE-QTR"><constant>ATSCMH_SCCC_CODE_QTR</constant></entry> 980 <entry>The outer code rate of a SCCC Block is 1/4 rate.</entry> 981 </row><row> 982 <entry id="ATSCMH-SCCC-CODE-RES"><constant>ATSCMH_SCCC_CODE_RES</constant></entry> 983 <entry>to be documented.</entry> 984 </row> 985 </tbody> 986 </tgroup> 987 </table> 988 </section> 989 <section id="DTV-ATSCMH-SCCC-CODE-MODE-B"> 990 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></title> 991 <para>Series Concatenated Convolutional Code Rate.</para> 992 <para>Possible values are the same as documented on 993 &atscmh-sccc-code-mode;.</para> 994 </section> 995 <section id="DTV-ATSCMH-SCCC-CODE-MODE-C"> 996 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></title> 997 <para>Series Concatenated Convolutional Code Rate.</para> 998 <para>Possible values are the same as documented on 999 &atscmh-sccc-code-mode;.</para> 1000 </section> 1001 <section id="DTV-ATSCMH-SCCC-CODE-MODE-D"> 1002 <title><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></title> 1003 <para>Series Concatenated Convolutional Code Rate.</para> 1004 <para>Possible values are the same as documented on 1005 &atscmh-sccc-code-mode;.</para> 1006 </section> 1007 </section> 1008 <section id="DTV-API-VERSION"> 1009 <title><constant>DTV_API_VERSION</constant></title> 1010 <para>Returns the major/minor version of the DVB API</para> 1011 </section> 1012 <section id="DTV-CODE-RATE-HP"> 1013 <title><constant>DTV_CODE_RATE_HP</constant></title> 1014 <para>Used on terrestrial transmissions. The acceptable values are 1015 the ones described at &fe-transmit-mode-t;. 1016 </para> 1017 </section> 1018 <section id="DTV-CODE-RATE-LP"> 1019 <title><constant>DTV_CODE_RATE_LP</constant></title> 1020 <para>Used on terrestrial transmissions. The acceptable values are 1021 the ones described at &fe-transmit-mode-t;. 1022 </para> 1023 1024 </section> 1025 1026 <section id="DTV-GUARD-INTERVAL"> 1027 <title><constant>DTV_GUARD_INTERVAL</constant></title> 1028 1029 <para>Possible values are:</para> 1030 1031 <section id="fe-guard-interval-t"> 1032 <title>Modulation guard interval</title> 1033 1034 <table pgwide="1" frame="none" id="fe-guard-interval"> 1035 <title>enum fe_guard_interval</title> 1036 <tgroup cols="2"> 1037 &cs-def; 1038 <thead> 1039 <row> 1040 <entry>ID</entry> 1041 <entry>Description</entry> 1042 </row> 1043 </thead> 1044 <tbody valign="top"> 1045 <row> 1046 <entry id="GUARD-INTERVAL-AUTO"><constant>GUARD_INTERVAL_AUTO</constant></entry> 1047 <entry>Autodetect the guard interval</entry> 1048 </row><row> 1049 <entry id="GUARD-INTERVAL-1-128"><constant>GUARD_INTERVAL_1_128</constant></entry> 1050 <entry>Guard interval 1/128</entry> 1051 </row><row> 1052 <entry id="GUARD-INTERVAL-1-32"><constant>GUARD_INTERVAL_1_32</constant></entry> 1053 <entry>Guard interval 1/32</entry> 1054 </row><row> 1055 <entry id="GUARD-INTERVAL-1-16"><constant>GUARD_INTERVAL_1_16</constant></entry> 1056 <entry>Guard interval 1/16</entry> 1057 </row><row> 1058 <entry id="GUARD-INTERVAL-1-8"><constant>GUARD_INTERVAL_1_8</constant></entry> 1059 <entry>Guard interval 1/8</entry> 1060 </row><row> 1061 <entry id="GUARD-INTERVAL-1-4"><constant>GUARD_INTERVAL_1_4</constant></entry> 1062 <entry>Guard interval 1/4</entry> 1063 </row><row> 1064 <entry id="GUARD-INTERVAL-19-128"><constant>GUARD_INTERVAL_19_128</constant></entry> 1065 <entry>Guard interval 19/128</entry> 1066 </row><row> 1067 <entry id="GUARD-INTERVAL-19-256"><constant>GUARD_INTERVAL_19_256</constant></entry> 1068 <entry>Guard interval 19/256</entry> 1069 </row><row> 1070 <entry id="GUARD-INTERVAL-PN420"><constant>GUARD_INTERVAL_PN420</constant></entry> 1071 <entry>PN length 420 (1/4)</entry> 1072 </row><row> 1073 <entry id="GUARD-INTERVAL-PN595"><constant>GUARD_INTERVAL_PN595</constant></entry> 1074 <entry>PN length 595 (1/6)</entry> 1075 </row><row> 1076 <entry id="GUARD-INTERVAL-PN945"><constant>GUARD_INTERVAL_PN945</constant></entry> 1077 <entry>PN length 945 (1/9)</entry> 1078 </row> 1079 </tbody> 1080 </tgroup> 1081 </table> 1082 1083 <para>Notes:</para> 1084 <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will 1085 try to find the correct guard interval (if capable) and will use TMCC to fill 1086 in the missing parameters.</para> 1087 <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para> 1088 <para>3) DTMB specifies PN420, PN595 and PN945.</para> 1089 </section> 1090 </section> 1091 <section id="DTV-TRANSMISSION-MODE"> 1092 <title><constant>DTV_TRANSMISSION_MODE</constant></title> 1093 1094 <para>Specifies the number of carriers used by the standard. 1095 This is used only on OFTM-based standards, e. g. 1096 DVB-T/T2, ISDB-T, DTMB</para> 1097 1098 <section id="fe-transmit-mode-t"> 1099 <title>enum fe_transmit_mode: Number of carriers per channel</title> 1100 1101 <table pgwide="1" frame="none" id="fe-transmit-mode"> 1102 <title>enum fe_transmit_mode</title> 1103 <tgroup cols="2"> 1104 &cs-def; 1105 <thead> 1106 <row> 1107 <entry>ID</entry> 1108 <entry>Description</entry> 1109 </row> 1110 </thead> 1111 <tbody valign="top"> 1112 <row> 1113 <entry id="TRANSMISSION-MODE-AUTO"><constant>TRANSMISSION_MODE_AUTO</constant></entry> 1114 <entry>Autodetect transmission mode. The hardware will try to find 1115 the correct FFT-size (if capable) to fill in the missing 1116 parameters.</entry> 1117 </row><row> 1118 <entry id="TRANSMISSION-MODE-1K"><constant>TRANSMISSION_MODE_1K</constant></entry> 1119 <entry>Transmission mode 1K</entry> 1120 </row><row> 1121 <entry id="TRANSMISSION-MODE-2K"><constant>TRANSMISSION_MODE_2K</constant></entry> 1122 <entry>Transmission mode 2K</entry> 1123 </row><row> 1124 <entry id="TRANSMISSION-MODE-8K"><constant>TRANSMISSION_MODE_8K</constant></entry> 1125 <entry>Transmission mode 8K</entry> 1126 </row><row> 1127 <entry id="TRANSMISSION-MODE-4K"><constant>TRANSMISSION_MODE_4K</constant></entry> 1128 <entry>Transmission mode 4K</entry> 1129 </row><row> 1130 <entry id="TRANSMISSION-MODE-16K"><constant>TRANSMISSION_MODE_16K</constant></entry> 1131 <entry>Transmission mode 16K</entry> 1132 </row><row> 1133 <entry id="TRANSMISSION-MODE-32K"><constant>TRANSMISSION_MODE_32K</constant></entry> 1134 <entry>Transmission mode 32K</entry> 1135 </row><row> 1136 <entry id="TRANSMISSION-MODE-C1"><constant>TRANSMISSION_MODE_C1</constant></entry> 1137 <entry>Single Carrier (C=1) transmission mode (DTMB)</entry> 1138 </row><row> 1139 <entry id="TRANSMISSION-MODE-C3780"><constant>TRANSMISSION_MODE_C3780</constant></entry> 1140 <entry>Multi Carrier (C=3780) transmission mode (DTMB)</entry> 1141 </row> 1142 </tbody> 1143 </tgroup> 1144 </table> 1145 1146 1147 <para>Notes:</para> 1148 <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called 1149 'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para> 1150 1151 <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the 1152 hardware will try to find the correct FFT-size (if capable) and will 1153 use TMCC to fill in the missing parameters.</para> 1154 <para>3) DVB-T specifies 2K and 8K as valid sizes.</para> 1155 <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para> 1156 <para>5) DTMB specifies C1 and C3780.</para> 1157 </section> 1158 </section> 1159 <section id="DTV-HIERARCHY"> 1160 <title><constant>DTV_HIERARCHY</constant></title> 1161 <para>Frontend hierarchy</para> 1162 1163 1164 <section id="fe-hierarchy-t"> 1165 <title>Frontend hierarchy</title> 1166 1167 <table pgwide="1" frame="none" id="fe-hierarchy"> 1168 <title>enum fe_hierarchy</title> 1169 <tgroup cols="2"> 1170 &cs-def; 1171 <thead> 1172 <row> 1173 <entry>ID</entry> 1174 <entry>Description</entry> 1175 </row> 1176 </thead> 1177 <tbody valign="top"> 1178 <row> 1179 <entry id="HIERARCHY-NONE"><constant>HIERARCHY_NONE</constant></entry> 1180 <entry>No hierarchy</entry> 1181 </row><row> 1182 <entry id="HIERARCHY-AUTO"><constant>HIERARCHY_AUTO</constant></entry> 1183 <entry>Autodetect hierarchy (if supported)</entry> 1184 </row><row> 1185 <entry id="HIERARCHY-1"><constant>HIERARCHY_1</constant></entry> 1186 <entry>Hierarchy 1</entry> 1187 </row><row> 1188 <entry id="HIERARCHY-2"><constant>HIERARCHY_2</constant></entry> 1189 <entry>Hierarchy 2</entry> 1190 </row><row> 1191 <entry id="HIERARCHY-4"><constant>HIERARCHY_4</constant></entry> 1192 <entry>Hierarchy 4</entry> 1193 </row> 1194 </tbody> 1195 </tgroup> 1196 </table> 1197 </section> 1198 1199 </section> 1200 <section id="DTV-STREAM-ID"> 1201 <title><constant>DTV_STREAM_ID</constant></title> 1202 <para>DVB-S2, DVB-T2 and ISDB-S support the transmission of several 1203 streams on a single transport stream. 1204 This property enables the DVB driver to handle substream filtering, 1205 when supported by the hardware. 1206 By default, substream filtering is disabled. 1207 </para><para> 1208 For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. 1209 </para><para> 1210 For ISDB, the valid substream id range is from 1 to 65535. 1211 </para><para> 1212 To disable it, you should use the special macro NO_STREAM_ID_FILTER. 1213 </para><para> 1214 Note: any value outside the id range also disables filtering. 1215 </para> 1216 </section> 1217 <section id="DTV-DVBT2-PLP-ID-LEGACY"> 1218 <title><constant>DTV_DVBT2_PLP_ID_LEGACY</constant></title> 1219 <para>Obsolete, replaced with DTV_STREAM_ID.</para> 1220 </section> 1221 <section id="DTV-ENUM-DELSYS"> 1222 <title><constant>DTV_ENUM_DELSYS</constant></title> 1223 <para>A Multi standard frontend needs to advertise the delivery systems provided. 1224 Applications need to enumerate the provided delivery systems, before using 1225 any other operation with the frontend. Prior to it's introduction, 1226 FE_GET_INFO was used to determine a frontend type. A frontend which 1227 provides more than a single delivery system, FE_GET_INFO doesn't help much. 1228 Applications which intends to use a multistandard frontend must enumerate 1229 the delivery systems associated with it, rather than trying to use 1230 FE_GET_INFO. In the case of a legacy frontend, the result is just the same 1231 as with FE_GET_INFO, but in a more structured format </para> 1232 </section> 1233 <section id="DTV-INTERLEAVING"> 1234 <title><constant>DTV_INTERLEAVING</constant></title> 1235 1236 <para>Time interleaving to be used. Currently, used only on DTMB.</para> 1237 1238 <table pgwide="1" frame="none" id="fe-interleaving"> 1239 <title>enum fe_interleaving</title> 1240 <tgroup cols="2"> 1241 &cs-def; 1242 <thead> 1243 <row> 1244 <entry>ID</entry> 1245 <entry>Description</entry> 1246 </row> 1247 </thead> 1248 <tbody valign="top"> 1249 <row> 1250 <entry id="INTERLEAVING-NONE"><constant>INTERLEAVING_NONE</constant></entry> 1251 <entry>No interleaving.</entry> 1252 </row><row> 1253 <entry id="INTERLEAVING-AUTO"><constant>INTERLEAVING_AUTO</constant></entry> 1254 <entry>Auto-detect interleaving.</entry> 1255 </row><row> 1256 <entry id="INTERLEAVING-240"><constant>INTERLEAVING_240</constant></entry> 1257 <entry>Interleaving of 240 symbols.</entry> 1258 </row><row> 1259 <entry id="INTERLEAVING-720"><constant>INTERLEAVING_720</constant></entry> 1260 <entry>Interleaving of 720 symbols.</entry> 1261 </row> 1262 </tbody> 1263 </tgroup> 1264 </table> 1265 1266 </section> 1267 <section id="DTV-LNA"> 1268 <title><constant>DTV_LNA</constant></title> 1269 <para>Low-noise amplifier.</para> 1270 <para>Hardware might offer controllable LNA which can be set manually 1271 using that parameter. Usually LNA could be found only from 1272 terrestrial devices if at all.</para> 1273 <para>Possible values: 0, 1, LNA_AUTO</para> 1274 <para>0, LNA off</para> 1275 <para>1, LNA on</para> 1276 <para>use the special macro LNA_AUTO to set LNA auto</para> 1277 </section> 1278 </section> 1279 1280 <section id="frontend-stat-properties"> 1281 <title>Frontend statistics indicators</title> 1282 <para>The values are returned via <constant>dtv_property.stat</constant>. 1283 If the property is supported, <constant>dtv_property.stat.len</constant> is bigger than zero.</para> 1284 <para>For most delivery systems, <constant>dtv_property.stat.len</constant> 1285 will be 1 if the stats is supported, and the properties will 1286 return a single value for each parameter.</para> 1287 <para>It should be noted, however, that new OFDM delivery systems 1288 like ISDB can use different modulation types for each group of 1289 carriers. On such standards, up to 3 groups of statistics can be 1290 provided, and <constant>dtv_property.stat.len</constant> is updated 1291 to reflect the "global" metrics, plus one metric per each carrier 1292 group (called "layer" on ISDB).</para> 1293 <para>So, in order to be consistent with other delivery systems, the first 1294 value at <link linkend="dtv-stats"><constant>dtv_property.stat.dtv_stats</constant></link> 1295 array refers to the global metric. The other elements of the array 1296 represent each layer, starting from layer A(index 1), 1297 layer B (index 2) and so on.</para> 1298 <para>The number of filled elements are stored at <constant>dtv_property.stat.len</constant>.</para> 1299 <para>Each element of the <constant>dtv_property.stat.dtv_stats</constant> array consists on two elements:</para> 1300 <itemizedlist mark='opencircle'> 1301 <listitem><para><constant>svalue</constant> or <constant>uvalue</constant>, where 1302 <constant>svalue</constant> is for signed values of the measure (dB measures) 1303 and <constant>uvalue</constant> is for unsigned values (counters, relative scale)</para></listitem> 1304 <listitem><para><constant>scale</constant> - Scale for the value. It can be:</para> 1305 <itemizedlist mark='bullet' id="fecap-scale-params"> 1306 <listitem id="FE-SCALE-NOT-AVAILABLE"><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - The parameter is supported by the frontend, but it was not possible to collect it (could be a transitory or permanent condition)</para></listitem> 1307 <listitem id="FE-SCALE-DECIBEL"><para><constant>FE_SCALE_DECIBEL</constant> - parameter is a signed value, measured in 1/1000 dB</para></listitem> 1308 <listitem id="FE-SCALE-RELATIVE"><para><constant>FE_SCALE_RELATIVE</constant> - parameter is a unsigned value, where 0 means 0% and 65535 means 100%.</para></listitem> 1309 <listitem id="FE-SCALE-COUNTER"><para><constant>FE_SCALE_COUNTER</constant> - parameter is a unsigned value that counts the occurrence of an event, like bit error, block error, or lapsed time.</para></listitem> 1310 </itemizedlist> 1311 </listitem> 1312 </itemizedlist> 1313 <section id="DTV-STAT-SIGNAL-STRENGTH"> 1314 <title><constant>DTV_STAT_SIGNAL_STRENGTH</constant></title> 1315 <para>Indicates the signal strength level at the analog part of the tuner or of the demod.</para> 1316 <para>Possible scales for this metric are:</para> 1317 <itemizedlist mark='bullet'> 1318 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1319 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - signal strength is in 0.001 dBm units, power measured in miliwatts. This value is generally negative.</para></listitem> 1320 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for power (actually, 0 to 65535).</para></listitem> 1321 </itemizedlist> 1322 </section> 1323 <section id="DTV-STAT-CNR"> 1324 <title><constant>DTV_STAT_CNR</constant></title> 1325 <para>Indicates the Signal to Noise ratio for the main carrier.</para> 1326 <para>Possible scales for this metric are:</para> 1327 <itemizedlist mark='bullet'> 1328 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1329 <listitem><para><constant>FE_SCALE_DECIBEL</constant> - Signal/Noise ratio is in 0.001 dB units.</para></listitem> 1330 <listitem><para><constant>FE_SCALE_RELATIVE</constant> - The frontend provides a 0% to 100% measurement for Signal/Noise (actually, 0 to 65535).</para></listitem> 1331 </itemizedlist> 1332 </section> 1333 <section id="DTV-STAT-PRE-ERROR-BIT-COUNT"> 1334 <title><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></title> 1335 <para>Measures the number of bit errors before the forward error correction (FEC) on the inner coding block (before Viterbi, LDPC or other inner code).</para> 1336 <para>This measure is taken during the same interval as <constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant>.</para> 1337 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by 1338 <link linkend="DTV-STAT-PRE-TOTAL-BIT-COUNT"><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></link>.</para> 1339 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1340 The frontend may reset it when a channel/transponder is tuned.</para> 1341 <para>Possible scales for this metric are:</para> 1342 <itemizedlist mark='bullet'> 1343 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1344 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted before the inner coding.</para></listitem> 1345 </itemizedlist> 1346 </section> 1347 <section id="DTV-STAT-PRE-TOTAL-BIT-COUNT"> 1348 <title><constant>DTV_STAT_PRE_TOTAL_BIT_COUNT</constant></title> 1349 <para>Measures the amount of bits received before the inner code block, during the same period as 1350 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> 1351 <para>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, 1352 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> 1353 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1354 The frontend may reset it when a channel/transponder is tuned.</para> 1355 <para>Possible scales for this metric are:</para> 1356 <itemizedlist mark='bullet'> 1357 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1358 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring 1359 <link linkend="DTV-STAT-PRE-ERROR-BIT-COUNT"><constant>DTV_STAT_PRE_ERROR_BIT_COUNT</constant></link>.</para></listitem> 1360 </itemizedlist> 1361 </section> 1362 <section id="DTV-STAT-POST-ERROR-BIT-COUNT"> 1363 <title><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></title> 1364 <para>Measures the number of bit errors after the forward error correction (FEC) done by inner code block (after Viterbi, LDPC or other inner code).</para> 1365 <para>This measure is taken during the same interval as <constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant>.</para> 1366 <para>In order to get the BER (Bit Error Rate) measurement, it should be divided by 1367 <link linkend="DTV-STAT-POST-TOTAL-BIT-COUNT"><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></link>.</para> 1368 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1369 The frontend may reset it when a channel/transponder is tuned.</para> 1370 <para>Possible scales for this metric are:</para> 1371 <itemizedlist mark='bullet'> 1372 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1373 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error bits counted after the inner coding.</para></listitem> 1374 </itemizedlist> 1375 </section> 1376 <section id="DTV-STAT-POST-TOTAL-BIT-COUNT"> 1377 <title><constant>DTV_STAT_POST_TOTAL_BIT_COUNT</constant></title> 1378 <para>Measures the amount of bits received after the inner coding, during the same period as 1379 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link> measurement was taken.</para> 1380 <para>It should be noted that this measurement can be smaller than the total amount of bits on the transport stream, 1381 as the frontend may need to manually restart the measurement, losing some data between each measurement interval.</para> 1382 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1383 The frontend may reset it when a channel/transponder is tuned.</para> 1384 <para>Possible scales for this metric are:</para> 1385 <itemizedlist mark='bullet'> 1386 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1387 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of bits counted while measuring 1388 <link linkend="DTV-STAT-POST-ERROR-BIT-COUNT"><constant>DTV_STAT_POST_ERROR_BIT_COUNT</constant></link>.</para></listitem> 1389 </itemizedlist> 1390 </section> 1391 <section id="DTV-STAT-ERROR-BLOCK-COUNT"> 1392 <title><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></title> 1393 <para>Measures the number of block errors after the outer forward error correction coding (after Reed-Solomon or other outer code).</para> 1394 <para>This measurement is monotonically increased, as the frontend gets more bit count measurements. 1395 The frontend may reset it when a channel/transponder is tuned.</para> 1396 <para>Possible scales for this metric are:</para> 1397 <itemizedlist mark='bullet'> 1398 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1399 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of error blocks counted after the outer coding.</para></listitem> 1400 </itemizedlist> 1401 </section> 1402 <section id="DTV-STAT-TOTAL-BLOCK-COUNT"> 1403 <title><constant>DTV-STAT_TOTAL_BLOCK_COUNT</constant></title> 1404 <para>Measures the total number of blocks received during the same period as 1405 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> measurement was taken.</para> 1406 <para>It can be used to calculate the PER indicator, by dividing 1407 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link> 1408 by <link linkend="DTV-STAT-TOTAL-BLOCK-COUNT"><constant>DTV-STAT-TOTAL-BLOCK-COUNT</constant></link>.</para> 1409 <para>Possible scales for this metric are:</para> 1410 <itemizedlist mark='bullet'> 1411 <listitem><para><constant>FE_SCALE_NOT_AVAILABLE</constant> - it failed to measure it, or the measurement was not complete yet.</para></listitem> 1412 <listitem><para><constant>FE_SCALE_COUNTER</constant> - Number of blocks counted while measuring 1413 <link linkend="DTV-STAT-ERROR-BLOCK-COUNT"><constant>DTV_STAT_ERROR_BLOCK_COUNT</constant></link>.</para></listitem> 1414 </itemizedlist> 1415 </section> 1416 </section> 1417 1418 <section id="frontend-property-terrestrial-systems"> 1419 <title>Properties used on terrestrial delivery systems</title> 1420 <section id="dvbt-params"> 1421 <title>DVB-T delivery system</title> 1422 <para>The following parameters are valid for DVB-T:</para> 1423 <itemizedlist mark='opencircle'> 1424 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1425 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1426 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1427 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1428 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1429 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1430 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1431 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1432 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> 1433 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> 1434 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1435 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1436 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> 1437 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1438 </itemizedlist> 1439 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1440 </section> 1441 <section id="dvbt2-params"> 1442 <title>DVB-T2 delivery system</title> 1443 <para>DVB-T2 support is currently in the early stages 1444 of development, so expect that this section maygrow and become 1445 more detailed with time.</para> 1446 <para>The following parameters are valid for DVB-T2:</para> 1447 <itemizedlist mark='opencircle'> 1448 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1449 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1450 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1451 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1452 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1453 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1454 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1455 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1456 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem> 1457 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem> 1458 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1459 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1460 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem> 1461 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1462 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1463 </itemizedlist> 1464 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1465 </section> 1466 <section id="isdbt"> 1467 <title>ISDB-T delivery system</title> 1468 <para>This ISDB-T/ISDB-Tsb API extension should reflect all information 1469 needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible 1470 that some very sophisticated devices won't need certain parameters to 1471 tune.</para> 1472 <para>The information given here should help application writers to know how 1473 to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para> 1474 <para>The details given here about ISDB-T and ISDB-Tsb are just enough to 1475 basically show the dependencies between the needed parameter values, 1476 but surely some information is left out. For more detailed information 1477 see the following documents:</para> 1478 <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial 1479 Television Broadcasting" and</para> 1480 <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial 1481 Television Broadcasting".</para> 1482 <para>In order to understand the ISDB specific parameters, 1483 one has to have some knowledge the channel structure in 1484 ISDB-T and ISDB-Tsb. I.e. it has to be known to 1485 the reader that an ISDB-T channel consists of 13 segments, 1486 that it can have up to 3 layer sharing those segments, 1487 and things like that.</para> 1488 <para>The following parameters are valid for ISDB-T:</para> 1489 <itemizedlist mark='opencircle'> 1490 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1491 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1492 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1493 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1494 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1495 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1496 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1497 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1498 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1499 <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem> 1500 <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem> 1501 <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem> 1502 <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem> 1503 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem> 1504 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem> 1505 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem> 1506 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem> 1507 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem> 1508 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem> 1509 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem> 1510 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem> 1511 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem> 1512 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem> 1513 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem> 1514 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem> 1515 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem> 1516 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem> 1517 </itemizedlist> 1518 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1519 </section> 1520 <section id="atsc-params"> 1521 <title>ATSC delivery system</title> 1522 <para>The following parameters are valid for ATSC:</para> 1523 <itemizedlist mark='opencircle'> 1524 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1525 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1526 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1527 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1528 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1529 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1530 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1531 </itemizedlist> 1532 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1533 </section> 1534 <section id="atscmh-params"> 1535 <title>ATSC-MH delivery system</title> 1536 <para>The following parameters are valid for ATSC-MH:</para> 1537 <itemizedlist mark='opencircle'> 1538 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1539 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1540 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1541 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1542 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1543 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1544 <listitem><para><link linkend="DTV-ATSCMH-FIC-VER"><constant>DTV_ATSCMH_FIC_VER</constant></link></para></listitem> 1545 <listitem><para><link linkend="DTV-ATSCMH-PARADE-ID"><constant>DTV_ATSCMH_PARADE_ID</constant></link></para></listitem> 1546 <listitem><para><link linkend="DTV-ATSCMH-NOG"><constant>DTV_ATSCMH_NOG</constant></link></para></listitem> 1547 <listitem><para><link linkend="DTV-ATSCMH-TNOG"><constant>DTV_ATSCMH_TNOG</constant></link></para></listitem> 1548 <listitem><para><link linkend="DTV-ATSCMH-SGN"><constant>DTV_ATSCMH_SGN</constant></link></para></listitem> 1549 <listitem><para><link linkend="DTV-ATSCMH-PRC"><constant>DTV_ATSCMH_PRC</constant></link></para></listitem> 1550 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-MODE"><constant>DTV_ATSCMH_RS_FRAME_MODE</constant></link></para></listitem> 1551 <listitem><para><link linkend="DTV-ATSCMH-RS-FRAME-ENSEMBLE"><constant>DTV_ATSCMH_RS_FRAME_ENSEMBLE</constant></link></para></listitem> 1552 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-PRI"><constant>DTV_ATSCMH_RS_CODE_MODE_PRI</constant></link></para></listitem> 1553 <listitem><para><link linkend="DTV-ATSCMH-RS-CODE-MODE-SEC"><constant>DTV_ATSCMH_RS_CODE_MODE_SEC</constant></link></para></listitem> 1554 <listitem><para><link linkend="DTV-ATSCMH-SCCC-BLOCK-MODE"><constant>DTV_ATSCMH_SCCC_BLOCK_MODE</constant></link></para></listitem> 1555 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-A"><constant>DTV_ATSCMH_SCCC_CODE_MODE_A</constant></link></para></listitem> 1556 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-B"><constant>DTV_ATSCMH_SCCC_CODE_MODE_B</constant></link></para></listitem> 1557 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-C"><constant>DTV_ATSCMH_SCCC_CODE_MODE_C</constant></link></para></listitem> 1558 <listitem><para><link linkend="DTV-ATSCMH-SCCC-CODE-MODE-D"><constant>DTV_ATSCMH_SCCC_CODE_MODE_D</constant></link></para></listitem> 1559 </itemizedlist> 1560 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1561 </section> 1562 <section id="dtmb-params"> 1563 <title>DTMB delivery system</title> 1564 <para>The following parameters are valid for DTMB:</para> 1565 <itemizedlist mark='opencircle'> 1566 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1567 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1568 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1569 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1570 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1571 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1572 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem> 1573 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1574 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1575 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem> 1576 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem> 1577 <listitem><para><link linkend="DTV-INTERLEAVING"><constant>DTV_INTERLEAVING</constant></link></para></listitem> 1578 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1579 </itemizedlist> 1580 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1581 </section> 1582 </section> 1583 <section id="frontend-property-cable-systems"> 1584 <title>Properties used on cable delivery systems</title> 1585 <section id="dvbc-params"> 1586 <title>DVB-C delivery system</title> 1587 <para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para> 1588 <para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para> 1589 <para>The following parameters are valid for DVB-C Annex A/C:</para> 1590 <itemizedlist mark='opencircle'> 1591 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1592 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1593 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1594 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1595 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1596 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1597 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1598 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1599 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1600 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1601 </itemizedlist> 1602 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1603 </section> 1604 <section id="dvbc-annex-b-params"> 1605 <title>DVB-C Annex B delivery system</title> 1606 <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para> 1607 <para>The following parameters are valid for DVB-C Annex B:</para> 1608 <itemizedlist mark='opencircle'> 1609 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1610 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1611 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1612 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1613 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1614 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1615 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1616 <listitem><para><link linkend="DTV-LNA"><constant>DTV_LNA</constant></link></para></listitem> 1617 </itemizedlist> 1618 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1619 </section> 1620 </section> 1621 <section id="frontend-property-satellite-systems"> 1622 <title>Properties used on satellite delivery systems</title> 1623 <section id="dvbs-params"> 1624 <title>DVB-S delivery system</title> 1625 <para>The following parameters are valid for DVB-S:</para> 1626 <itemizedlist mark='opencircle'> 1627 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1628 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1629 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1630 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1631 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1632 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1633 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1634 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1635 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> 1636 <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem> 1637 </itemizedlist> 1638 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1639 <para>Future implementations might add those two missing parameters:</para> 1640 <itemizedlist mark='opencircle'> 1641 <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem> 1642 <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem> 1643 </itemizedlist> 1644 </section> 1645 <section id="dvbs2-params"> 1646 <title>DVB-S2 delivery system</title> 1647 <para>In addition to all parameters valid for DVB-S, DVB-S2 supports the following parameters:</para> 1648 <itemizedlist mark='opencircle'> 1649 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1650 <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem> 1651 <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem> 1652 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1653 </itemizedlist> 1654 <para>In addition, the <link linkend="frontend-stat-properties">DTV QoS statistics</link> are also valid.</para> 1655 </section> 1656 <section id="turbo-params"> 1657 <title>Turbo code delivery system</title> 1658 <para>In addition to all parameters valid for DVB-S, turbo code supports the following parameters:</para> 1659 <itemizedlist mark='opencircle'> 1660 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem> 1661 </itemizedlist> 1662 </section> 1663 <section id="isdbs-params"> 1664 <title>ISDB-S delivery system</title> 1665 <para>The following parameters are valid for ISDB-S:</para> 1666 <itemizedlist mark='opencircle'> 1667 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem> 1668 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem> 1669 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem> 1670 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem> 1671 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem> 1672 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem> 1673 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem> 1674 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem> 1675 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem> 1676 <listitem><para><link linkend="DTV-STREAM-ID"><constant>DTV_STREAM_ID</constant></link></para></listitem> 1677 </itemizedlist> 1678 </section> 1679 </section> 1680 </section>