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Re: [Discuss-gnuradio] Freq center auto adjust
From: |
David I. Emery |
Subject: |
Re: [Discuss-gnuradio] Freq center auto adjust |
Date: |
Mon, 12 Mar 2007 17:16:33 -0400 |
User-agent: |
Mutt/1.4.1i |
On Mon, Mar 12, 2007 at 10:45:14AM -0700, Johnathan Corgan wrote:
> 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.
Probably I am quibbling terribly, but mostly AFC implies
a frequency locked loop... usually used to correct the LO frequency
so a signal sits in the center of the passband.
Sometimes the VCO (NCO) frequency offset of a PLL IS used
for this, but it doesn't have to be...
--
Dave Emery N1PRE, address@hidden DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."