Dear all,
Owning a HP 8569B spectrum analyzer and knowing many specialist here who know this machine very well, I have a question:
All functions, like calibrating, attenuator steps and so on are, as far I can see, are good working
What I do find strange is that reducing the bandwidth results in a lower noise floor, which is normal, but also the complete signal will go down.
I mean with that the amount of graticule lines stay the same but the top of the signal go's down with the noise floor.
Is this normal?
If not, what could be wrong or has to be adjusted?