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C/N of Low-IF Receiver with small Gain (Read 61 times)

pancho_hideboo

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C/N of Low-IF Receiver with small Gain
Sep 05^th, 2005, 8:40am

Hi.

How do you measure C/N or NF of Low-IF Reciever which doesn't have much Gain ? � Kiss

Generally Noise Source for NF Meter is valid from 10MHz.

I can't evaluate C/N reliably using Spectrum Analyzer since
Receiver doesn't have much Gain.

Is there any practical or reliable instrument in commercial ?

Noise/Com Inc. has good solution ?
http://www.noisecom.com/

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http://www.youtube.com/watch?v=mjIxGh55bMM&feature=related

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cybq Junior Member Offline Posts: 16	Re: C/N of Low-IF Receiver with small Gain Reply #1 - Jun 8^th, 2006, 11:24pm try to use enough low noise floor spectrum analyzer, with addition of RF probe (it is a hign input impedance device).
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keplin New Member Offline Posts: 8 SF Bay Area	Re: C/N of Low-IF Receiver with small Gain Reply #2 - Aug 5^th, 2006, 11:38am How about using a really low resolution bandwidth on the Spectrum Analayzer and using a Noise Source with an ENR of say 15dB? This should work well.
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