Re: scopeing filters for eventual diversity receive.

Posted by Dave, G4AON on Mar 28, 2010; 3:10pm
URL: http://elecraft.85.s1.nabble.com/scopeing-filters-for-eventual-diversity-receive-tp4810767p4813378.html

Inject a clean signal to the K3, around S5 - S7 in level, go into the
CONFIG menu, adjust the filter offset (FLx FRQ) by rotating the main
tuning knob until the signal drops one S point then adjust it to the
other side until it again drops one S point. Set the offset to the
middle of the two extremes.

My 400 Hz 8 pole filter appeared to have more insertion loss than my 250
Hz 8 pole, setting the offset solved the apparent additional insertion
loss. My settings are -0.07 for the 400 Hz and -0.05 for the 250 Hz.

73 Dave, G4AON
K3/100 #80
-----------------------

How are you testing for offset? Sounds like I should check the offset on my
5 and 8 pole filters.

73,
N2TK, Tony
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