1 <section id="FE_GET_SET_PROPERTY">
2 <title><constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></title>
3 <para>This section describes the DVB version 5 extention of the DVB-API, also
4 called "S2API", as this API were added to provide support for DVB-S2. It was
5 designed to be able to replace the old frontend API. Yet, the DISEQC and
6 the capability ioctls weren't implemented yet via the new way.</para>
7 <para>The typical usage for the <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant>
8 API is to replace the ioctl's were the <link linkend="dvb-frontend-parameters">
9 struct <constant>dvb_frontend_parameters</constant></link> were used.</para>
10 <section id="dtv-property">
11 <title>DTV property type</title>
13 /* Reserved fields should be set to 0 */
26 } __attribute__ ((packed));
28 /* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */
29 #define DTV_IOCTL_MAX_MSGS 64
32 <section id="dtv-properties">
33 <title>DTV properties type</title>
35 struct dtv_properties {
37 struct dtv_property *props;
42 <section id="FE_GET_PROPERTY">
43 <title>FE_GET_PROPERTY</title>
46 <informaltable><tgroup cols="1"><tbody><row><entry
48 <para>This ioctl call returns one or more frontend properties. This call only
49 requires read-only access to the device.</para>
51 </row></tbody></tgroup></informaltable>
54 <informaltable><tgroup cols="1"><tbody><row><entry
56 <para>int ioctl(int fd, int request = <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>,
57 dtv_properties ⋆props);</para>
59 </row></tbody></tgroup></informaltable>
62 <informaltable><tgroup cols="2"><tbody><row><entry align="char">
66 <para>File descriptor returned by a previous call to open().</para>
73 <para>Equals <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link> for this command.</para>
77 <para>struct dtv_property *props</para>
80 <para>Points to the location where the front-end property commands are stored.</para>
82 </row></tbody></tgroup></informaltable>
84 <informaltable><tgroup cols="2"><tbody><row>
85 <entry align="char"><para>EINVAL</para></entry>
86 <entry align="char"><para>Invalid parameter(s) received or number of parameters out of the range.</para></entry>
88 <entry align="char"><para>ENOMEM</para></entry>
89 <entry align="char"><para>Out of memory.</para></entry>
91 <entry align="char"><para>EFAULT</para></entry>
92 <entry align="char"><para>Failure while copying data from/to userspace.</para></entry>
94 <entry align="char"><para>EOPNOTSUPP</para></entry>
95 <entry align="char"><para>Property type not supported.</para></entry>
96 </row></tbody></tgroup></informaltable>
99 <section id="FE_SET_PROPERTY">
100 <title>FE_SET_PROPERTY</title>
103 <informaltable><tgroup cols="1"><tbody><row><entry
105 <para>This ioctl call sets one or more frontend properties. This call only
106 requires read-only access to the device.</para>
108 </row></tbody></tgroup></informaltable>
111 <informaltable><tgroup cols="1"><tbody><row><entry
113 <para>int ioctl(int fd, int request = <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>,
114 dtv_properties ⋆props);</para>
116 </row></tbody></tgroup></informaltable>
119 <informaltable><tgroup cols="2"><tbody><row><entry align="char">
123 <para>File descriptor returned by a previous call to open().</para>
130 <para>Equals <link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link> for this command.</para>
134 <para>struct dtv_property *props</para>
137 <para>Points to the location where the front-end property commands are stored.</para>
139 </row></tbody></tgroup></informaltable>
142 <informaltable><tgroup cols="2"><tbody><row>
143 <entry align="char"><para>EINVAL</para></entry>
144 <entry align="char"><para>Invalid parameter(s) received or number of parameters out of the range.</para></entry>
146 <entry align="char"><para>ENOMEM</para></entry>
147 <entry align="char"><para>Out of memory.</para></entry>
149 <entry align="char"><para>EFAULT</para></entry>
150 <entry align="char"><para>Failure while copying data from/to userspace.</para></entry>
152 <entry align="char"><para>EOPNOTSUPP</para></entry>
153 <entry align="char"><para>Property type not supported.</para></entry>
154 </row></tbody></tgroup></informaltable>
158 <title>Property types</title>
160 On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>/<link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>,
161 the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to
162 get/set up to 64 properties. The actual meaning of each property is described on the next sections.
165 <para>The available frontend property types are shown on the next section.</para>
168 <section id="fe_property_parameters">
169 <title>Digital TV property parameters</title>
170 <section id="DTV-UNDEFINED">
171 <title><constant>DTV_UNDEFINED</constant></title>
172 <para>Used internally. A GET/SET operation for it won't change or return anything.</para>
174 <section id="DTV-TUNE">
175 <title><constant>DTV_TUNE</constant></title>
176 <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>
178 <section id="DTV-CLEAR">
179 <title><constant>DTV_CLEAR</constant></title>
180 <para>Reset a cache of data specific to the frontend here. This does not effect hardware.</para>
182 <section id="DTV-FREQUENCY">
183 <title><constant>DTV_FREQUENCY</constant></title>
185 <para>Central frequency of the channel, in HZ.</para>
188 <para>1)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
189 E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
190 the channel which is 6MHz.</para>
192 <para>2)As in ISDB-Tsb the channel consists of only one or three segments the
193 frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
194 central frequency of the channel is expected.</para>
196 <section id="DTV-MODULATION">
197 <title><constant>DTV_MODULATION</constant></title>
198 <para>Specifies the frontend modulation type for cable and satellite types. The modulation can be one of the types bellow:</para>
200 typedef enum fe_modulation {
217 <section id="DTV-BANDWIDTH-HZ">
218 <title><constant>DTV_BANDWIDTH_HZ</constant></title>
220 <para>Bandwidth for the channel, in HZ.</para>
222 <para>Possible values:
223 <constant>1712000</constant>,
224 <constant>5000000</constant>,
225 <constant>6000000</constant>,
226 <constant>7000000</constant>,
227 <constant>8000000</constant>,
228 <constant>10000000</constant>.
233 <para>1) For ISDB-T it should be always 6000000Hz (6MHz)</para>
234 <para>2) For ISDB-Tsb it can vary depending on the number of connected segments</para>
235 <para>3) Bandwidth doesn't apply for DVB-C transmissions, as the bandwidth
236 for DVB-C depends on the symbol rate</para>
237 <para>4) Bandwidth in ISDB-T is fixed (6MHz) or can be easily derived from
238 other parameters (DTV_ISDBT_SB_SEGMENT_IDX,
239 DTV_ISDBT_SB_SEGMENT_COUNT).</para>
240 <para>5) DVB-T supports 6, 7 and 8MHz.</para>
241 <para>6) In addition, DVB-T2 supports 1.172, 5 and 10MHz.</para>
243 <section id="DTV-INVERSION">
244 <title><constant>DTV_INVERSION</constant></title>
245 <para>The Inversion field can take one of these values:
248 typedef enum fe_spectral_inversion {
252 } fe_spectral_inversion_t;
254 <para>It indicates if spectral inversion should be presumed or not. In the automatic setting
255 (<constant>INVERSION_AUTO</constant>) the hardware will try to figure out the correct setting by
259 <section id="DTV-DISEQC-MASTER">
260 <title><constant>DTV_DISEQC_MASTER</constant></title>
261 <para>Currently not implemented.</para>
263 <section id="DTV-SYMBOL-RATE">
264 <title><constant>DTV_SYMBOL_RATE</constant></title>
265 <para>Digital TV symbol rate, in bauds (symbols/second). Used on cable standards.</para>
267 <section id="DTV-INNER-FEC">
268 <title><constant>DTV_INNER_FEC</constant></title>
269 <para>Used cable/satellite transmissions. The acceptable values are:
272 typedef enum fe_code_rate {
287 <para>which correspond to error correction rates of 1/2, 2/3, etc.,
288 no error correction or auto detection.</para>
290 <section id="DTV-VOLTAGE">
291 <title><constant>DTV_VOLTAGE</constant></title>
292 <para>The voltage is usually used with non-DiSEqC capable LNBs to switch
293 the polarzation (horizontal/vertical). When using DiSEqC epuipment this
294 voltage has to be switched consistently to the DiSEqC commands as
295 described in the DiSEqC spec.</para>
297 typedef enum fe_sec_voltage {
303 <section id="DTV-TONE">
304 <title><constant>DTV_TONE</constant></title>
305 <para>Currently not used.</para>
307 <section id="DTV-PILOT">
308 <title><constant>DTV_PILOT</constant></title>
309 <para>Sets DVB-S2 pilot</para>
310 <section id="fe-pilot-t">
311 <title>fe_pilot type</title>
313 typedef enum fe_pilot {
321 <section id="DTV-ROLLOFF">
322 <title><constant>DTV_ROLLOFF</constant></title>
323 <para>Sets DVB-S2 rolloff</para>
325 <section id="fe-rolloff-t">
326 <title>fe_rolloff type</title>
328 typedef enum fe_rolloff {
329 ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */
337 <section id="DTV-DISEQC-SLAVE-REPLY">
338 <title><constant>DTV_DISEQC_SLAVE_REPLY</constant></title>
339 <para>Currently not implemented.</para>
341 <section id="DTV-FE-CAPABILITY-COUNT">
342 <title><constant>DTV_FE_CAPABILITY_COUNT</constant></title>
343 <para>Currently not implemented.</para>
345 <section id="DTV-FE-CAPABILITY">
346 <title><constant>DTV_FE_CAPABILITY</constant></title>
347 <para>Currently not implemented.</para>
349 <section id="DTV-DELIVERY-SYSTEM">
350 <title><constant>DTV_DELIVERY_SYSTEM</constant></title>
351 <para>Specifies the type of Delivery system</para>
352 <section id="fe-delivery-system-t">
353 <title>fe_delivery_system type</title>
354 <para>Possible values: </para>
356 typedef enum fe_delivery_system {
374 } fe_delivery_system_t;
378 <section id="DTV-ISDBT-PARTIAL-RECEPTION">
379 <title><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></title>
381 <para>If <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '0' this bit-field represents whether
382 the channel is in partial reception mode or not.</para>
384 <para>If '1' <constant>DTV_ISDBT_LAYERA_*</constant> values are assigned to the center segment and
385 <constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant> has to be '1'.</para>
387 <para>If in addition <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'
388 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> represents whether this ISDB-Tsb channel
389 is consisting of one segment and layer or three segments and two layers.</para>
391 <para>Possible values: 0, 1, -1 (AUTO)</para>
393 <section id="DTV-ISDBT-SOUND-BROADCASTING">
394 <title><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></title>
396 <para>This field represents whether the other DTV_ISDBT_*-parameters are
397 referring to an ISDB-T and an ISDB-Tsb channel. (See also
398 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>).</para>
400 <para>Possible values: 0, 1, -1 (AUTO)</para>
402 <section id="DTV-ISDBT-SB-SUBCHANNEL-ID">
403 <title><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></title>
405 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
407 <para>(Note of the author: This might not be the correct description of the
408 <constant>SUBCHANNEL-ID</constant> in all details, but it is my understanding of the technical
409 background needed to program a device)</para>
411 <para>An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a
412 set of connected ISDB-Tsb channels. In this set of channels every
413 channel can be received independently. The number of connected
414 ISDB-Tsb segment can vary, e.g. depending on the frequency spectrum
415 bandwidth available.</para>
417 <para>Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The
418 broadcaster has several possibilities to put those channels in the
419 air: Assuming a normal 13-segment ISDB-T spectrum he can align the 8
420 segments from position 1-8 to 5-13 or anything in between.</para>
422 <para>The underlying layer of segments are subchannels: each segment is
423 consisting of several subchannels with a predefined IDs. A sub-channel
424 is used to help the demodulator to synchronize on the channel.</para>
426 <para>An ISDB-T channel is always centered over all sub-channels. As for
427 the example above, in ISDB-Tsb it is no longer as simple as that.</para>
429 <para><constant>The DTV_ISDBT_SB_SUBCHANNEL_ID</constant> parameter is used to give the
430 sub-channel ID of the segment to be demodulated.</para>
432 <para>Possible values: 0 .. 41, -1 (AUTO)</para>
434 <section id="DTV-ISDBT-SB-SEGMENT-IDX">
435 <title><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></title>
436 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
437 <para><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant> gives the index of the segment to be
438 demodulated for an ISDB-Tsb channel where several of them are
439 transmitted in the connected manner.</para>
440 <para>Possible values: 0 .. <constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> - 1</para>
441 <para>Note: This value cannot be determined by an automatic channel search.</para>
443 <section id="DTV-ISDBT-SB-SEGMENT-COUNT">
444 <title><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></title>
445 <para>This field only applies if <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> is '1'.</para>
446 <para><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant> gives the total count of connected ISDB-Tsb
448 <para>Possible values: 1 .. 13</para>
449 <para>Note: This value cannot be determined by an automatic channel search.</para>
451 <section id="isdb-hierq-layers">
452 <title><constant>DTV-ISDBT-LAYER*</constant> parameters</title>
453 <para>ISDB-T channels can be coded hierarchically. As opposed to DVB-T in
454 ISDB-T hierarchical layers can be decoded simultaneously. For that
455 reason a ISDB-T demodulator has 3 viterbi and 3 reed-solomon-decoders.</para>
456 <para>ISDB-T has 3 hierarchical layers which each can use a part of the
457 available segments. The total number of segments over all layers has
458 to 13 in ISDB-T.</para>
459 <para>There are 3 parameter sets, for Layers A, B and C.</para>
460 <section id="DTV-ISDBT-LAYER-ENABLED">
461 <title><constant>DTV_ISDBT_LAYER_ENABLED</constant></title>
462 <para>Hierarchical reception in ISDB-T is achieved by enabling or disabling
463 layers in the decoding process. Setting all bits of
464 <constant>DTV_ISDBT_LAYER_ENABLED</constant> to '1' forces all layers (if applicable) to be
465 demodulated. This is the default.</para>
466 <para>If the channel is in the partial reception mode
467 (<constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> = 1) the central segment can be decoded
468 independently of the other 12 segments. In that mode layer A has to
469 have a <constant>SEGMENT_COUNT</constant> of 1.</para>
470 <para>In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb
471 according to <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>. <constant>SEGMENT_COUNT</constant> must be filled
473 <para>Possible values: 0x1, 0x2, 0x4 (|-able)</para>
474 <para><constant>DTV_ISDBT_LAYER_ENABLED[0:0]</constant> - layer A</para>
475 <para><constant>DTV_ISDBT_LAYER_ENABLED[1:1]</constant> - layer B</para>
476 <para><constant>DTV_ISDBT_LAYER_ENABLED[2:2]</constant> - layer C</para>
477 <para><constant>DTV_ISDBT_LAYER_ENABLED[31:3]</constant> unused</para>
479 <section id="DTV-ISDBT-LAYER-FEC">
480 <title><constant>DTV_ISDBT_LAYER*_FEC</constant></title>
481 <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>
483 <section id="DTV-ISDBT-LAYER-MODULATION">
484 <title><constant>DTV_ISDBT_LAYER*_MODULATION</constant></title>
485 <para>Possible values: <constant>QAM_AUTO</constant>, QP<constant>SK, QAM_16</constant>, <constant>QAM_64</constant>, <constant>DQPSK</constant></para>
486 <para>Note: If layer C is <constant>DQPSK</constant> layer B has to be <constant>DQPSK</constant>. If layer B is <constant>DQPSK</constant>
487 and <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant>=0 layer has to be <constant>DQPSK</constant>.</para>
489 <section id="DTV-ISDBT-LAYER-SEGMENT-COUNT">
490 <title><constant>DTV_ISDBT_LAYER*_SEGMENT_COUNT</constant></title>
491 <para>Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO)</para>
492 <para>Note: Truth table for <constant>DTV_ISDBT_SOUND_BROADCASTING</constant> and
493 <constant>DTV_ISDBT_PARTIAL_RECEPTION</constant> and <constant>LAYER</constant>*_SEGMENT_COUNT</para>
494 <informaltable id="isdbt-layer_seg-cnt-table">
500 <entry>Layer A width</entry>
501 <entry>Layer B width</entry>
502 <entry>Layer C width</entry>
503 <entry>total width</entry>
508 <entry>1 .. 13</entry>
509 <entry>1 .. 13</entry>
510 <entry>1 .. 13</entry>
517 <entry>1 .. 13</entry>
518 <entry>1 .. 13</entry>
541 <section id="DTV-ISDBT-LAYER-TIME-INTERLEAVING">
542 <title><constant>DTV_ISDBT_LAYER*_TIME_INTERLEAVING</constant></title>
543 <para>Possible values: 0, 1, 2, 3, -1 (AUTO)</para>
544 <para>Note: The real inter-leaver depth-names depend on the mode (fft-size); the values
545 here are referring to what can be found in the TMCC-structure -
546 independent of the mode.</para>
549 <section id="DTV-API-VERSION">
550 <title><constant>DTV_API_VERSION</constant></title>
551 <para>Returns the major/minor version of the DVB API</para>
553 <section id="DTV-CODE-RATE-HP">
554 <title><constant>DTV_CODE_RATE_HP</constant></title>
555 <para>Used on terrestrial transmissions. The acceptable values are:
558 typedef enum fe_code_rate {
574 <section id="DTV-CODE-RATE-LP">
575 <title><constant>DTV_CODE_RATE_LP</constant></title>
576 <para>Used on terrestrial transmissions. The acceptable values are:
579 typedef enum fe_code_rate {
595 <section id="DTV-GUARD-INTERVAL">
596 <title><constant>DTV_GUARD_INTERVAL</constant></title>
598 <para>Possible values are:</para>
600 typedef enum fe_guard_interval {
606 GUARD_INTERVAL_1_128,
607 GUARD_INTERVAL_19_128,
608 GUARD_INTERVAL_19_256,
609 } fe_guard_interval_t;
613 <para>1) If <constant>DTV_GUARD_INTERVAL</constant> is set the <constant>GUARD_INTERVAL_AUTO</constant> the hardware will
614 try to find the correct guard interval (if capable) and will use TMCC to fill
615 in the missing parameters.</para>
616 <para>2) Intervals 1/128, 19/128 and 19/256 are used only for DVB-T2 at present</para>
618 <section id="DTV-TRANSMISSION-MODE">
619 <title><constant>DTV_TRANSMISSION_MODE</constant></title>
621 <para>Specifies the number of carriers used by the standard</para>
623 <para>Possible values are:</para>
625 typedef enum fe_transmit_mode {
626 TRANSMISSION_MODE_2K,
627 TRANSMISSION_MODE_8K,
628 TRANSMISSION_MODE_AUTO,
629 TRANSMISSION_MODE_4K,
630 TRANSMISSION_MODE_1K,
631 TRANSMISSION_MODE_16K,
632 TRANSMISSION_MODE_32K,
633 } fe_transmit_mode_t;
636 <para>1) ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called
637 'mode' in the standard: Mode 1 is 2K, mode 2 is 4K, mode 3 is 8K</para>
639 <para>2) If <constant>DTV_TRANSMISSION_MODE</constant> is set the <constant>TRANSMISSION_MODE_AUTO</constant> the
640 hardware will try to find the correct FFT-size (if capable) and will
641 use TMCC to fill in the missing parameters.</para>
642 <para>3) DVB-T specifies 2K and 8K as valid sizes.</para>
643 <para>4) DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K.</para>
645 <section id="DTV-HIERARCHY">
646 <title><constant>DTV_HIERARCHY</constant></title>
647 <para>Frontend hierarchy</para>
649 typedef enum fe_hierarchy {
658 <section id="DTV-ISDBS-TS-ID">
659 <title><constant>DTV_ISDBS_TS_ID</constant></title>
660 <para>Currently unused.</para>
662 <section id="DTV-DVBT2-PLP-ID">
663 <title><constant>DTV_DVBT2_PLP_ID</constant></title>
664 <para>DVB-T2 supports Physical Layer Pipes (PLP) to allow transmission of
665 many data types via a single multiplex. The API will soon support this
666 at which point this section will be expanded.</para>
669 <section id="frontend-property-terrestrial-systems">
670 <title>Properties used on terrestrial delivery systems</title>
671 <section id="dvbt-params">
672 <title>DVB-T delivery system</title>
673 <para>The following parameters are valid for DVB-T:</para>
674 <itemizedlist mark='opencircle'>
675 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
676 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
677 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
678 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
679 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
680 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
681 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
682 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
683 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
684 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
685 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
686 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
687 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
690 <section id="dvbt2-params">
691 <title>DVB-T2 delivery system</title>
692 <para>DVB-T2 support is currently in the early stages
693 of development, so expect that this section maygrow and become
694 more detailed with time.</para>
695 <para>The following parameters are valid for DVB-T2:</para>
696 <itemizedlist mark='opencircle'>
697 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
698 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
699 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
700 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
701 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
702 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
703 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
704 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
705 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
706 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
707 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
708 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
709 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
710 <listitem><para><link linkend="DTV-DVBT2-PLP-ID"><constant>DTV_DVBT2_PLP_ID</constant></link></para></listitem>
714 <title>ISDB-T delivery system</title>
715 <para>This ISDB-T/ISDB-Tsb API extension should reflect all information
716 needed to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible
717 that some very sophisticated devices won't need certain parameters to
719 <para>The information given here should help application writers to know how
720 to handle ISDB-T and ISDB-Tsb hardware using the Linux DVB-API.</para>
721 <para>The details given here about ISDB-T and ISDB-Tsb are just enough to
722 basically show the dependencies between the needed parameter values,
723 but surely some information is left out. For more detailed information
724 see the following documents:</para>
725 <para>ARIB STD-B31 - "Transmission System for Digital Terrestrial
726 Television Broadcasting" and</para>
727 <para>ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial
728 Television Broadcasting".</para>
729 <para>In order to understand the ISDB specific parameters,
730 one has to have some knowledge the channel structure in
731 ISDB-T and ISDB-Tsb. I.e. it has to be known to
732 the reader that an ISDB-T channel consists of 13 segments,
733 that it can have up to 3 layer sharing those segments,
734 and things like that.</para>
735 <para>The following parameters are valid for ISDB-T:</para>
736 <itemizedlist mark='opencircle'>
737 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
738 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
739 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
740 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
741 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
742 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
743 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
744 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
745 <listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
746 <listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
747 <listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
748 <listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
749 <listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
750 <listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem>
751 <listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem>
752 <listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem>
753 <listitem><para><link linkend="DTV-ISDBT-SB-SUBCHANNEL-ID"><constant>DTV_ISDBT_SB_SUBCHANNEL_ID</constant></link></para></listitem>
754 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-IDX"><constant>DTV_ISDBT_SB_SEGMENT_IDX</constant></link></para></listitem>
755 <listitem><para><link linkend="DTV-ISDBT-SB-SEGMENT-COUNT"><constant>DTV_ISDBT_SB_SEGMENT_COUNT</constant></link></para></listitem>
756 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERA_FEC</constant></link></para></listitem>
757 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERA_MODULATION</constant></link></para></listitem>
758 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERA_SEGMENT_COUNT</constant></link></para></listitem>
759 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERA_TIME_INTERLEAVING</constant></link></para></listitem>
760 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERB_FEC</constant></link></para></listitem>
761 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERB_MODULATION</constant></link></para></listitem>
762 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERB_SEGMENT_COUNT</constant></link></para></listitem>
763 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERB_TIME_INTERLEAVING</constant></link></para></listitem>
764 <listitem><para><link linkend="DTV-ISDBT-LAYER-FEC"><constant>DTV_ISDBT_LAYERC_FEC</constant></link></para></listitem>
765 <listitem><para><link linkend="DTV-ISDBT-LAYER-MODULATION"><constant>DTV_ISDBT_LAYERC_MODULATION</constant></link></para></listitem>
766 <listitem><para><link linkend="DTV-ISDBT-LAYER-SEGMENT-COUNT"><constant>DTV_ISDBT_LAYERC_SEGMENT_COUNT</constant></link></para></listitem>
767 <listitem><para><link linkend="DTV-ISDBT-LAYER-TIME-INTERLEAVING"><constant>DTV_ISDBT_LAYERC_TIME_INTERLEAVING</constant></link></para></listitem>
770 <section id="atsc-params">
771 <title>ATSC delivery system</title>
772 <para>The following parameters are valid for ATSC:</para>
773 <itemizedlist mark='opencircle'>
774 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
775 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
776 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
777 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
778 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
779 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
780 <listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
784 <section id="frontend-property-cable-systems">
785 <title>Properties used on cable delivery systems</title>
786 <section id="dvbc-params">
787 <title>DVB-C delivery system</title>
788 <para>The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para>
789 <para>The following parameters are valid for DVB-C Annex A/C:</para>
790 <itemizedlist mark='opencircle'>
791 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
792 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
793 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
794 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
795 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
796 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
797 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
798 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
799 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
802 <section id="dvbc-annex-b-params">
803 <title>DVB-C Annex B delivery system</title>
804 <para>The DVB-C Annex-B is only used on a few Countries like the United States.</para>
805 <para>The following parameters are valid for DVB-C Annex B:</para>
806 <itemizedlist mark='opencircle'>
807 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
808 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
809 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
810 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
811 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
812 <listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
813 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
817 <section id="frontend-property-satellital-systems">
818 <title>Properties used on satellital delivery systems</title>
819 <section id="dvbs-params">
820 <title>DVB-S delivery system</title>
821 <para>The following parameters are valid for DVB-S:</para>
822 <itemizedlist mark='opencircle'>
823 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
824 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
825 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
826 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
827 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
828 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
829 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
830 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
832 <para>Future implementations might add those two missing parameters:</para>
833 <itemizedlist mark='opencircle'>
834 <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem>
835 <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem>
838 <section id="dvbs2-params">
839 <title>DVB-S2 delivery system</title>
840 <para>The following parameters are valid for DVB-S2:</para>
841 <itemizedlist mark='opencircle'>
842 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
843 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
844 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
845 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
846 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
847 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
848 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
849 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
850 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
851 <listitem><para><link linkend="DTV-TONE"><constant>DTV_TONE</constant></link></para></listitem>
852 <listitem><para><link linkend="DTV-PILOT"><constant>DTV_PILOT</constant></link></para></listitem>
853 <listitem><para><link linkend="DTV-ROLLOFF"><constant>DTV_ROLLOFF</constant></link></para></listitem>
855 <para>Future implementations might add those two missing parameters:</para>
856 <itemizedlist mark='opencircle'>
857 <listitem><para><link linkend="DTV-DISEQC-MASTER"><constant>DTV_DISEQC_MASTER</constant></link></para></listitem>
858 <listitem><para><link linkend="DTV-DISEQC-SLAVE-REPLY"><constant>DTV_DISEQC_SLAVE_REPLY</constant></link></para></listitem>
861 <section id="isdbs-params">
862 <title>ISDB-S delivery system</title>
863 <para>The following parameters are valid for ISDB-S:</para>
864 <itemizedlist mark='opencircle'>
865 <listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>
866 <listitem><para><link linkend="DTV-DELIVERY-SYSTEM"><constant>DTV_DELIVERY_SYSTEM</constant></link></para></listitem>
867 <listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
868 <listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
869 <listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
870 <listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
871 <listitem><para><link linkend="DTV-SYMBOL-RATE"><constant>DTV_SYMBOL_RATE</constant></link></para></listitem>
872 <listitem><para><link linkend="DTV-INNER-FEC"><constant>DTV_INNER_FEC</constant></link></para></listitem>
873 <listitem><para><link linkend="DTV-VOLTAGE"><constant>DTV_VOLTAGE</constant></link></para></listitem>
874 <listitem><para><link linkend="DTV-ISDBS-TS-ID"><constant>DTV_ISDBS_TS_ID</constant></link></para></listitem>