K3 IF output is simply the 1st IF=8.215 MHz which is simple RF
covering a wide bandwidth. Simple way to generate IQ baseband audio
is with any of the inexpensive SDR's. I use the LP-Pan which was
specifically designed for the K3 IF. the LP-Pan has a input
bandwidth of about 400-KHz. I use either a emu-0202 which can
support 192-KHz or a Delta44 which supports 90-KHz audio.
Elecraft responded to customer desires and included IQ baseband
output for the KX3, so one only needs a decent audio interface to a
soundcard. You can make one yourself. Its on my lengthy "to-do" list.
73, Ed - KL7UW
To: Barry LaZar <[email protected]>
Cc: "<[email protected]>" <[email protected]>
Subject: Re: [Elecraft] Kx3 RxIQ
Message-ID:
<came0jbtbguxzumn3ojm2xxuiubmo3__jci84s_hgtcdokiv...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Thanks Barry, that explanation helps alot. So I'm assuming that the
IF output of the K3 is a very traditional IF as in other radios, ie
it's not Quadrature, etc. Would that be correct?
If so, another approach would be to feed into an A/D, and then do the
rest in software, ie gnuradio. I wouldn't be surprised to find out
that gnuradio already supports similar configurations, including down
converting (for certain), splitting and creating the quadrature output
(unknown). Sounds like a fun project. Wish I had time to pursue it!!
;)
If I'm reading the block diagram correctly, it looks like an 8.125 MHz IF.
-Chris
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
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