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Re: [Discuss-gnuradio] Freq center auto adjust

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Freq center auto adjust
Date: Mon, 12 Mar 2007 10:45:14 -0700
User-agent: Thunderbird (X11/20070306)

George Barrinuevo wrote:

> My ICOM PCR-1000 scanner has a feature to auto adjust the frequency
> to get the strongest signal to compensate where the center frequency
> drifts a few hertz, say drifts 0.0040Mhz in the 900Mhz range.  My 
> question is what is this feature called and is there an equivalent
> for USRP/GNURadio?

This is typically call Automatic Frequency Control and shortened to AFC.

Accomplishing AFC is modulation specific; in GNU Radio one typically
builds a flow graph that incorporates AFC by using an appropriate
phase-locked loop.

Johnathan Corgan
Corgan Enterprises LLC

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