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Hello!
I’ve got USB-SA44B analyzer. Software version is 3.0.22, firmware version is 2.11.
When “Amplitude -> Div” is 10 dB, analyzer works fine (fig. 1), noise level is 140 dBm (open input). When “Div” is 20 dB, noise level is dependent from “Ref Level”. Please, fix it.
Please, tell me, if you need some additional information.
Best wishes,
NikitaHi Nikita,
Yes, the noise floor is tied to reference level. This is because we optimize attenuation and gain of the receiver based on the reference level. This makes it easy to configure the receiver for your expected input signal. If you wish you can control the gain and attenuation manually by enabling it from the setting file menu. This way, you have consistent measurements across reference level.
Regards,
A.J.
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