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Re: [Discuss-gnuradio] Receiver gain setting of XCVR2450 in UHD code


From: Josh Blum
Subject: Re: [Discuss-gnuradio] Receiver gain setting of XCVR2450 in UHD code
Date: Fri, 20 Aug 2010 01:45:53 -0700
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6

Controlling gains individually from the api is on my TODO list. :-) Internally, they are all separated, but the set_xx_gain(...) calls into this gain_group object that sets the codec + dboard gains as a whole. See lib/utils/gain_group.cpp

Also give uhd_usrp_probe a run to see the various controllable gain elements.

-Josh



On 08/20/2010 12:26 AM, Christoph Thein wrote:
Am 20.08.2010 08:45, schrieb Per Zetterberg:
Hi Josh and List,

In the data-sheet of the MAX2829 circuit two receiver gains are
specified "Receiver Front-End Gain-Control Settings" and "Receiver
Baseband VGA Gain Settings". From the UHD API we only have one gain
parameter. I have been searching in the UHD code to find where (and
how) the split is done, but I can't find it......


BR/
Per

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