[Premium-Rx] Electro-Metrics EM-8500 Demodulator

[David I. Emery]

On Sun, Jan 14, 2007 at 12:40:47AM +0000, spencer bahner wrote:
> Does anyone out there have any experience playing with the EM-8500 demods 
> that have been showing up on Epay of late? I bought one that seems to work 
> with the though that I need to buy an HP more-or-less portable spectrum 
> analyser anyway. Having demod capability would be useful for the land-mobile 
> work I do... The second IF input appears useful for use with WJ microwave 
> receivers that lack narrowband demods.


	I worked for a company that for a while owned Electro-Metrics
back in the mid 90s.   The president of that company told me about
the Electro Metrics division and their products and called these things
to my attention (he knew I was into ham radio and rf listening as well
as running hardware R&D projects).

	These units were around then - for both Tek and HP spectrum
analyzers as I remember and at least one of them had the capacity to do
a wide FM demodulation of a signal and then SSB demodulate FM-FDM-SSB
subcarriers from the signal baseband.   This was quite common back then
for  microwave links - but in the 12 years or so since most of those
have gone fully digital.

	I didn't own a matching spectrum analyzer back then or I would
have tried to latch onto one...

-- 
   Dave Emery N1PRE,  die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either."