Reply To: Power Spectral Density Measurement Discrepancy?

AJ

Can you try attenuating the input to ensure you are not in compression?

There is a 20db fixed attenuator on the input of the SH and the Ref Offset is set to 20db.

With your ref offset active, set the reference level to +40 to see if this affects the measurement. I am concerned that the signal is possible being compressed in the Spike software.

I have changed the Ref Level from +40 to 20dbm with very little difference in peak power measured.

If you have a generator, can you try a similar test?

I don’t have a generator other than the radio being tested. It’s output is +20dbm.