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Re: [Discuss-gnuradio] How to switch off the Automatic Digital-Gain-Cont

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] How to switch off the Automatic Digital-Gain-Control?
Date: Fri, 7 Dec 2012 08:47:59 -0800

Which daughterboard are you using?


On Mon, Nov 26, 2012 at 3:48 AM, Andis Dembovskis <address@hidden> wrote:
Hello, dear Developer-Team,
I recently came across to situation, when I have to model 2 overlapping signals within the same frequency but different power levels. I wanted to use variable IQ-envelope size for that - one signal with level of 0.2 and another with 0.6. The max sum of 0.8 would be still fitting the allowed DAC amplitude of my USRP_N210.
BUT there seems to be some Automatic Gain Control for the digital signal. Independent if I set amplitude of my digital signal to 0.2 or 0.6, the measured output in DB is the same.
How is it possible to switch that function off?
With the "self.uhd_usrp_sink_0.set_gain(5, 0)" I can do only the analog output gain control.

Hope somebody have the solution,
With best regards,

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