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Re: [Discuss-gnuradio] TVRX Microtune 4702 (4937) Gain question


From: Alexandru Csete
Subject: Re: [Discuss-gnuradio] TVRX Microtune 4702 (4937) Gain question
Date: Fri, 24 Jun 2011 18:14:54 +0200

On Fri, Jun 24, 2011 at 5:45 PM, Patrik Tast <address@hidden> wrote:
Hi All,
 
I can not see in source code where GR is setting the TVRXx gain. I'm referring to
gnuradio-core/src/lib/io/microtune.cc

I'm don't think that code is related to TVRX. For old non-uhd driver you need to look in the usrp/host/lib/ directory.
 
 
If so (not set), what does it default to, max? See page 12 and forward. The tuner document can be found at 
http://www.poes-weather.com/~patrik/usrp/4937-DI5-3x8899-2.pdf

In db_tv_rx.cc constructor, line 101, the gain is initialized to middle.
The gain ranges are also available via the API and you can see many of the examples also initialize the gain to middle value.

Alex


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