Self Test fail SA44B

Hi .
I did a self-test to my SA44B firmware 2.10
Pass all the tests apart the attenuator fail -9.41 (see attached).
However, the analyzer seems to work.
What are the correct results of the self-test for SA44B ?
The attenuator = -9.41 is in the tolerance or not working ?

Thank you
Ermy

Attachments:

You must be logged in to view attached files.

Ermy,
There are two possibilities:
1) Your attenuator was outside the normal range when it was adjusted. In this case, the amplitudes would read correctly at all reference levels, but the noise floor would come up a few extra dB at certain reference levels.
2) Your attenuator has been slightly damaged (typically from ESD), and only reads correctly at certain reference levels.
This is something we could repair if you are interested.
A good way to manually check your device is to inject a known signal, at -45 dBm or so. Check the reading at -40 dBm reference level, 200 kHz span, and then step the reference level in 5 dB steps up to 0 dBm. If any reading differs by more than 2 dB, your attenuator is probably damaged.

Justin thanks for the reply.
I made a quick check (See Attachment).
The attenuater is broken ?

Thank you

Ermy

Attachments:

You must be logged in to view attached files.

Yes, it looks like the attenuator is broken. You can email support@signalhound.com for information on repairs.

[Author]

Posts