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Code Issues Releases Wiki Activity

start to add some more information on ci speed settings

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Ralph Metzler 2016-06-16 15:39:40 +02:00
parent b36a6392cc
commit ffdcd91a06
1 changed files with 21 additions and 1 deletions
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docs/ci
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@ -1,3 +1,5 @@
- General Information
The caX device associated with a CI device behaves just like any other The caX device associated with a CI device behaves just like any other
caX interface. You usually use it through a library like libdvben50221 caX interface. You usually use it through a library like libdvben50221
which is part of the dvb-apps package available at linuxtv.org. which is part of the dvb-apps package available at linuxtv.org.
@ -26,6 +28,24 @@ use the new interface.
See docs/redirect for more info. See docs/redirect for more info.
- Clock Speed
The normal clock speed for the TS output is 72 MHz wich is the standard
speed used for CI.
Packets are sent with an adjustable gap between the packets.
The gap size is (gap value * 2) + 4 or 0 if the gap is disabled.
So, the standard gap value of 4 leads to a gap of 12 bytes which means
that the effective data rate is (72*188)/200 = 67.68 MBits/s.
Depending on the hardware, the clock speed can be changed with the
ci_bitrate module parameter:
- Octopus CI, Octopus CI S2 Pro : supported
- old CI single flex modules: supported
- new dual CI flex module: not yet supported, use the standard 72000 kHz
Valid ranges for are from ... to 96000 KHz.