Something wrong with my N9320A spectrum analyzer

[wldshy]

Hi guys

there are something wrong with my spectrum analyzer, its signal level is 30db lower then excepted.
for example I feed a 10MHz  0dbm into, it shows 10MHz -30dbm,like following picture.



and when try to calibrate ifself, it shows an error with ERROR 654,TO LOW INPUT, like this.



is there anyone have same suggestion?
or where can I get service guide of the module. there is noting help on keysight website.

[Neganur]

Run a mechanical attenuators check from the service or alignment menu (don’t remember which).

[nctnico]

I see mdBm on the generator. Anyway, I'd check the signal from the generator's output with an oscilloscope to make sure the problem is in the spectrum analyser or generator.

[AF6LJ]

That's not a good sign, when you switch in different amounts of attenuation does the Analyzer show a correct value or are all the attenuator positions off by 30DB??

[xmo]

Does the front panel calibrator signal also measure 30 dB too low?