Make the note better formatted and documented. Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> --- .../media/uapi/dvb/fe_property_parameters.rst | 26 +++++++++++++--------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/Documentation/media/uapi/dvb/fe_property_parameters.rst b/Documentation/media/uapi/dvb/fe_property_parameters.rst index 47eb29350717..1b0b1171602d 100644 --- a/Documentation/media/uapi/dvb/fe_property_parameters.rst +++ b/Documentation/media/uapi/dvb/fe_property_parameters.rst @@ -39,20 +39,26 @@ effect hardware. DTV_FREQUENCY ============= -Central frequency of the channel. +Frequency of the digital TV transponder/channel. -Notes: +.. note:: -1)For satellite delivery systems, it is measured in kHz. For the other -ones, it is measured in Hz. + #. For satellite delivery systems, the frequency is in kHz. -2)For ISDB-T, the channels are usually transmitted with an offset of -143kHz. E.g. a valid frequency could be 474143 kHz. The stepping is -bound to the bandwidth of the channel which is 6MHz. + #. For cable and terrestrial delivery systems, the frequency is in + Hz. -3)As in ISDB-Tsb the channel consists of only one or three segments the -frequency step is 429kHz, 3*429 respectively. As for ISDB-T the central -frequency of the channel is expected. + #. On most delivery systems, the frequency is the center frequency + of the transponder/channel. The exception is for ISDB-T, where + the main carrier has a 1/7 offset from the center. + + #. For ISDB-T, the channels are usually transmitted with an offset of + about 143kHz. E.g. a valid frequency could be 474,143 kHz. The + stepping is bound to the bandwidth of the channel which is + typically 6MHz. + + #. In ISDB-Tsb, the channel consists of only one or three segments the + frequency step is 429kHz, 3*429 respectively. .. _DTV-MODULATION: -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
