RE: [Discuss-gnuradio] Quadrature demodulator update

[Philip Mackenzie]

>What other receivers might people on this list recommend
>using?

Hi,

We've used the 10.7MHz output on an AOR AR8600 receiver for a software radio
project. We connected the output to 2 mini circuits ZFL-500 coaxial
amplifiers in series (http://www.mini-circuits.com/dg03-172.pdf), then to a
ceramic filter and then into a 4020 board. Its probably not the best way to
do it because we get alot of noise but it works for strong signals and was
fine for our purposes.

Actually if anyone can explain the noise then I'd be interested to know what
was causing it (I'm sure its some kind of impedance problem). We were
getting strong carriers appearing throughout the receive band at multiples
of the sampling rate of the card. So when we were sampling at say 4MHz the
band would be blanked out at 96, 100, 104MHz, etc.

Philip.


-----Original Message-----
From: address@hidden
[mailto:address@hidden Behalf Of
Maitland Bottoms
Sent: 11 February 2003 17:03
To: address@hidden
Subject: [Discuss-gnuradio] Quadrature demodulator update


Heh,
I didn't need to forward that last here.

Anyways, some AMRAD LF experimenters are also building
IQ downconverters for the 136 kHz band.

But back to 10.7 MHz IF - I believe the Icom R-7000
receivers have an output jack for a 10.7 MHz IF signal.
What other receivers might people on this list recommend
using?

-Maitland


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