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Old June 12th 07, 03:29 AM posted to rec.radio.cb
james james is offline
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First recorded activity by RadioBanter: Sep 2006
Posts: 298
Default Modulation on scope question

On Sun, 10 Jun 2007 19:04:01 -0400, "Leland C. Scott"
wrote:

+++
+++"james" wrote in message
m...
+++ I have been very happy with the unit I have. The front keypad is still
+++ in very excellent shape as the unit I have was on the factory floor
+++ and control of it was via the GPIB connection from an HP workstation.
+++
+++Well that's good. I'm a bit leery of spending big bucks on used test gear
+++since you don't know what the last guy did to it abuse wise, something
+++stupid like keying up the xmit with the signal generator still attached. I
+++found that if the equipment looks good cosmetically there is a good chance
+++the guy selling it didn't abuse the equipment, much.
+++
+++I would like to get a nice spectrum analyzer but anything worth having is in
+++the $2K range, a bit too much to take a chance on it from a total stranger.
+++I could spent $6K on a nice new portable LCD one. 8-))

*****************

If you want a Spectrum Analyzer just to monitor your transmitter
signals and not do design work with there are a couple of nice
circuits on teh net that can be put together for under $200. Maybe
under $100.

The one by the Green Bay Professional Packet Radio group is a nice one
for signal monitoring. It is based on the W7ZOI and K7TAU circuits and
is a better one as it will work up to 1Gig. Granted these are not as
good as commercial built test equiptment but for monitoring emmisions
compliance it is better than nothing. I think the circuit would be
neat to interface it to a quarter VGA color LCD panel.

james