keysight spectrum analizer accurate spur measurement using attenuation reduction

Thread Starter

yef smith

Joined Aug 2, 2020
293
Hello,I am trying to see the spurs arround the signal by lowering the attenuation of the spectrum analizer.
but i notice that my noise floor rises for some reason when i lower the attenuation.
also there is the offset parmeter that plays a role in controlling the attenuation.
my spectrum analizer stops attenuation lowering if my offset is too high for some reason??
Why lowering attenuation gives us a more accurate result?
Thanks.
 

Deleted member 115935

Joined Dec 31, 1969
0
Hello,I am trying to see the spurs arround the signal by lowering the attenuation of the spectrum analizer.
but i notice that my noise floor rises for some reason when i lower the attenuation.
also there is the offset parmeter that plays a role in controlling the attenuation.
my spectrum analizer stops attenuation lowering if my offset is too high for some reason??
Why lowering attenuation gives us a more accurate result?
Thanks.
to look at the spurs in more detail,
you need to lower the span such that you are not receiving the main ,
 
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