[Premium-Rx] Watkins Johnson WJ-9472

[Dave Emery]

On Mon, Jan 03, 2005 at 02:06:11AM +0000, Eugene Hertz wrote: 

> Any one know about the Watkins Johnson WJ-9472? Looks like a diversity
> demodulator, any one know the input and output?

	AFAIK 600 ohm single ended audio at around 0 dbm.  As was common
in WJ gear of that era, this is on BNC connectors rather than balanced
terminal strips as seems common today in broadcast gear...

	The eBay item is obviously a 80s era FSK converter with a fancy
scope display of various things including I think some kind of input
spectrum display...

	It has a RS-232ish level output somewhere... plus audio at the
mark and space IF frequency (few khz) for a cross type external display.

	It can be used as two independant HF FSK demods, a space or
frequency diversity FSK demod, or a 4 tone DFSK demod (if there is any
of the 4 tone MFSK stuff left - it was common in the Soviet era).

	The eBay unit, like almost all NSA gear of the era is 488
controllable.

	
-- 
   Dave Emery N1PRE,  die at dieconsulting.com  DIE Consulting, Weston, Mass 02493