I have here N9030A with WLAN application for 802.11ah. My problem is that there is pass/fail limit set in the application for EVM test at -999dB and the instrument always says FAIL when testing. I tryied to reprogram it manually and remotely and when reading the limit remotely it reads what I program there, but on the screen it always sais FAIL and -999, and reading remotely pass/fail it returns fail. I think it happened after firmware update, though not sure exactly at which point.
How do I fix it?
Whe use this instrument for demos to customers and it looks bad when we have to explain why we are unable to get -999dB EVM error limit