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TinySA15dB/30dB Attenuator, different readings

 

Hi All,

In my test setup i am analyzing a DAB signal.
I am using a 20Db hardware attenuator, and the TinySA internal 15 or 30Db attenuator.
When the Tiny's 30Db attenuator is used, the signal looks fine - but when i use the 15Db attenuator, the signal looks completely different.
Am i doing something wrong, or has this something to do with overloading the TinySA / internal spurs?

Thanks

TinySA_15.PNG
TinySA_30.PNG

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