An article in a series documenting measurements on an IC-7410.
This focuses on receiver Noise Figure.
Tag: Noise FIgure Meter
Using an attenuator for NoiseLo/NoiseHi in NFM
A common method of making Noise Figure measurements of a receiver is to use a noise generator of known noise power. The output power of the DUT is measured with the generator off (NoiseLo) and on (NoiseHi), a Y factor calculated, and from that Noise Figure is calculated.
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VK2OMD ambient noise measurement 144MHz – 20140217
I made a measurement of ambient noise on 144MHz this morning using the technique described at (Duffy 2009).
First step is to recheck the NF of the receiver. The TS2000 is getting a little tired, NF=8.3dB.
The technique calculates ambient noise from the variation in receiver output noise of a receiver of known Noise Figure with the insertion of a known input attenuator. The receiver output noise was measured using NFM (Duffy 2007) which allowed integration over 20s for high resolution measurement.
Continue reading VK2OMD ambient noise measurement 144MHz – 20140217