Pulse-Eight neo 4*4 Video Matrix Product User Manual page 24

IR NOISE TEST
The IR Noise Test will check to see if any IR data is being received over a sustained period of time for each output, fail-
ing this test would indicate that the IR receiver is picking up noise.
Example of failure message:
The IR receiver connected to this port is occasionally picking up stray IR messages, this may occasionally interrupt IR
communication to the connected source device and/or control system, if you repeat this test and it remains in this state,
you may find it is tolerable, but we recommend relocating the IR emitter anyway.