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Hello
I just purchased the new Advanced Phase Noise Measurement Tool Kit license, and activated it on SP145.
I think that SP145 is a better option for phase noise measurement compared to BB60D, due to its better phase noise, but I don’t know if its lack of preselector filters would be particularly bad for this use case (e.g. making wrong measurements)
Can you please comment on this? (I want to decide if I should keep the license attached to my SP145 or change to BB60D)
ThanksThe SP145 would be the better choice for phase noise measurements due to it’s better absolute phase noise performance and higher frequency range.
The purpose of the preselector is to filter out of band energy. This is most commonly helpful when measuring over the air with an antenna, as communications signals such as broadcast radio, cellular, WLAN, are filtered, improving measurement performance such as dynamic range.
Phase noise measurements are commonly/ideally made directly connected to the DUT via coax, eliminating the presence of out of band energy unless generated by the DUT itself. You can always insert a filter if out of band energy was a problem for a particular measurement setup.
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