31 Jul
2012
31 Jul
'12
6:42 p.m.
There is a valve block that works like a switch. There is also a stream
selector block that can switch one or more inputs to one or more outputs.
You can find the stream selector block here
https://github.com/guruofquality/grextras/wiki#wiki-list-of-blocks-in-this-…
On 7/31/2012 3:09 AM, Dmitry Medvedev wrote:
I'm writing multichannel p25 recorder. It mostly works (thanks to op25
team and other contributors). Is there any open documentation on control
channel messages, especially TSBK frames? I did trellis decoding and CRC
algorithm (reverse engineered the later, as I couldn't find parameters).
I understand structure of some messages, for example "Group Voice
Channel Grant Update" (opcode 02, manufacturer id 00), but many opcodes
remain unknown. Do you have any leads on this?
Also, I'm not very familiar with gnuradio, is there way to place some
kind of "gate" in flowgraph so some parts of it can be switched on/off
by external event? I want to use such feature to gate voice channels
on/off and do not waste processor cycles on filtering channels that do
not carry traffic at the moment.
Best regards,
Dmitry