Reply To: SA44B noise measurement

Hello, Justin
Thank you for details. I believe that knowing the right device setup for my measurement should help me, although measurement itself became more complicated.
It is very strange that the device, which are positioned and defined in its data sheet as a spectrum analyzer, can’t do well one of the typical tasks of spectrum analyzers, a measurement of noise.
I performed a measurement of noise with the SA44B setup as you described and with a correction of 3 dB for image energy.
I got values, which are by about 1 dB higher than values that I get with a span of 200 MHz and with no any correction.
1. Could you help me to understand this effect, please?
2. Which one of measurement results should I believe more?
Thank you