Single Beep from PGXL

I have a PGXL v3.8.8 and noticed on 12 and 17m only the amp will give a single audible beep. If I'm using between 500w to 2000w. Before I go down the rabbit hole on the steps I have taken to investigate when the PGXL beeps and doesn't beep.

No alarm faults are given at anytime on the screen , only a single beep sound and everything functions as it should. Attached below is the PGXL chart that was made during some of the investigation into the beep noise.

Nothing found in PGXL manual regarding a beep sound.

Does anyone have any idea what would cause the PGXL to beep? No faults displayed.

4 hf antenna all under 1.5 swr

Yes Dummy Load used local and at tower.

I know more info is needed, but just trying to find, what might cause the PGXL to beep at this point, before getting into what I have done so far.

Thanks in advance

73

Shawn

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