Hello, I have an IFR-1600S service monitor that appears to work properly.
However, when I run its series of self tests, it fails the "low pass filter" test. The maintenance manual I have doesn't contain schematics, nor does it speak to any of the self tests. Accordingly, I have no idea which of the several low pass filters it's testing and which one it thinks is malfunctioning. Does anyone have any experience\knowledge of the self tests within this series of test systems? Eric
