[Elecraft] AGC and IF Output

[Edward R Cole]

Doug,

Wes answer your question, simply.  A little more info on this: I 
believe AGC only operates in the 2nd IF in the digital domain of the 
K3 SDR.  RF preamp and 1st conversion stage is constant gain which is 
all that you see at the IF output.  I use the IF to drive two LP-Pan 
as fixed freq SDR's to provide I-Q signals for MAP65 on 2m-eme.  I 
take both main IF and subRx IF because I simultaneously receive two 
polarity RF.

So the good news is your SDR-IQ will see a fixed signal in direct 
relation to the signal level input to the K3.  Very handy if looking 
at sky noise vs ground noise on mw.  SDR-IQ signal level display will 
be in direct relation to signal from antenna (plus gain of 
transverter and K3 front end).

I use my SDR-IQ in parallel with my K3 on the transverter IF which 
allows me to monitor ground noise floor on 1296+.  Definitely see 
ground noise as antenna comes down to horizon or sees a tree or 
bldg.  I measure my dish Tsun/cs this way using Spectravue in the 
continuous mode (amplitude vs time).

73, Ed - KL7UW
6m, 2m, 23cm eme ...9cm coming next

Date: Thu, 10 Aug 2017 04:43:00 +0000 (UTC)
From: Doug Millar <drzarkof56 at yahoo.com>
To: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: [Elecraft] AGC and IF Output
Message-ID: <470439615.902322.1502340180745 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8

Hi All, Simple question. I am using the K3 as part of a microwave EME 
station. I am using an SDR IQ on the IF output. My question is 
whether the AGC effects the IF output level.?? Doug K6JEY


73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com