I noticed a remedy for the following problem on the K3 enhancement list - Some users prefer tuning the band with a wide filter bandwidth selected (for example, using a 2.7 or 2.8 kHz SSB filter in CW mode rather than a 500 Hz or narrower filter). Strong off-frequency signals (above about S9+5) that are inside the crystal filter passband can then activate the hardware AGC circuit, reducing the level of desired signals.
Shouldn't a radio's AGC only use signals within the selected final IF passband width to control gain? Wasn't this kind of AGC "pumping" described above a problem in older radios when DSP initially featured and the AGC wasn't included within the DSP functionality? That is, AGC would operate using circuitry prior to the DSP, users would then narrow the passband width using the DSP but then found that signals outside this passband would reduce the desired signal. -- View this message in context: http://www.nabble.com/AGC-Design-of-the-K3-tp17199520p17199520.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
