Marconi 2382 spurious response
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Marconi 2382 spurious response

 
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Andrew Holme
Guest
Posted: Sun Oct 09, 2005 11:17 pm    Post subject: Marconi 2382 spurious response Reply with quote
My Marconi 2382 spectrum analyzer has a spurious response at 94.8 MHz, which
suggests the 1st LO is getting into the 2nd mixer. It's about 20 dB above
the noise floor at RBW 1 KHz, independent of input attenuation. Has anyone
else seen this problem on a 2382?

The vital statistics are:
1st IF = 502.6 MHz
2nd IF = 47.4 MHz
1st LO = 597.4 MHz (for f = 94.8 MHz)
2nd LO = 550 MHz (fixed)

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Jorgen Lund-Nielsen
Guest
Posted: Mon Oct 10, 2005 2:19 pm    Post subject: Re: Marconi 2382 spurious response Reply with quote
Andrew Holme wrote:

Quote:
My Marconi 2382 spectrum analyzer has a spurious response at 94.8 MHz, which
suggests the 1st LO is getting into the 2nd mixer. It's about 20 dB above
the noise floor at RBW 1 KHz, independent of input attenuation. Has anyone
else seen this problem on a 2382?

The vital statistics are:
1st IF = 502.6 MHz
2nd IF = 47.4 MHz
1st LO = 597.4 MHz (for f = 94.8 MHz)
2nd LO = 550 MHz (fixed)


Hello,

there is a yahoo group for marconi instrument users,
maybe they could help.

http://groups.yahoo.com/group/marconi_test_instruments/

Regards

Jorgen
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