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 <>
To: Elecraft Reflector <>
Subject: [Elecraft] AGC and IF Output
Message-ID: <>
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
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