[Elecraft] [KX3] I.F. Structure similar to k3??
Edward R. Cole
kl7uw at acsalaska.net
Wed Feb 29 16:20:23 EST 2012
To put in slightly different terms:
The KX3 is a direct conversion radio and has no IF (intermediate
frequency). e.g. If you tune 14.305 USB, that signal mixes with the
VFO=14.305 MHz. The result is audio.
But this is a SDR so more accurately the output is (approx) 3KHz
baseband audio in two streams phase shifted 90 degrees apart (the "I
and Q signals" which go to a A/D and are digitally demodulated by the
internal DSP processor). This same IQ baseband is available for
export to a stereo soundcard for those wanting to run soundcard
programs (like psk-31, SSTV, or WSPR, etc.) on a computer.
ergo no IF. I suppose you were wanting to connect to a P3? I
believe the Elecraft folks have something planned to accomplish that
with a KX3 (your turn to comment, Wayne or Eric).
73, Ed - KL7UW, WD2XSH/45
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