Phase Noise measurements
Customer question: The V6 Phase Noise measurement result is quite different from what we get with a Signal Hound non-real-time Spectrum Analyzer. We wonder if we did something wrong or why this is happening. Attached are screenshots for these two measurements. The VNA's source is set to 1GHz for both measurements. The Signal Hound's measurement shows a lot lower phase noise. Any hints to enhance the sensitivity for this phase noise measurement would be welcome.
Also we weren't able to increase the reference level to more than -8dBm, any hints?
And we have noticed that the measurement becomes visibly slower when the span is set to 1/512. Is this because the sampling time inevitably must be longer for narrower bandwidths?
Uploaded files:
You are measuring with 241Hz which is wrong. You need to set the RBW to 1Hz (need FFT key) otherwise you measurement shows wrong and much to high values.
Alternative you could use higher RBWs but in that case your phase noise measurement is only valid at high distances from the main signal e.g. 1lkHz and you need to recalculate the measurement based on 1Hz RBW.
Set the Amp to "Auto" for full range reflevel adjustment.
