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Measurements >> RF Measurements >> NF measurement using noise source
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Message started by karen on Sep 11^th, 2008, 3:41pm

Title: NF measurement using noise source
Post by karen on Sep 11^th, 2008, 3:41pm

Hello,
I am using HP346A noise source to measure the receiver chain noise figre. That is a ZIF system. I switch on/off the noise source, measure the output noise difference, do the calculation, I got the NF.
Do I need to subtract 3 dB from the calculation?
thanks.
k : :-[

Title: Re: NF measurement using noise source
Post by Mazz on Dec 26^th, 2008, 12:54am

In case of ZIF systems the NF is DSB (double sideband) so you don't need to subtract 3dB.
Mazz