Paul Pollock wrote:
2). A pad buffer (at the output of the dummy load) to be used to filter
out/reduce the transmitter RF, and detect/output the audio. This is used
as the input to a computer soundcard (for use with Spectrogram or other
spectrum analyzer)) for transmitter bandwidth/BFO analysis.
You would also need to tap the BFO, and include a mixer.
However, are you aware that there is an, undocumented, IF loop back
feature in the K2 firmware? If you key the transmitter in CAL FIL mode,
at least for an SSB FL1 filter, the signal is looped back to the receive
side, through the filter. This is true for the most recent firmware, as
its undocumented, I don't know if it is in any older versions.
I assume this uses the same loop back path as the carrier balance
adjustment mode.
--
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.
_______________________________________________
Elecraft mailing list
Post to: [email protected]
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
