PTP650 BHs won't use the maximum transmit power, even on links that struggling. They always seem to be 3 dBm below what the max is set to, and this was the case with previous PTP products as well. I have asked a bunch of folks at Cambium what causes this, but it's always been a secondary question as part of a larger issue and I never got an answer. Because of an increase in noise in our area, I now find myself really needing those extra few dBm on some of our links.
As an example, I'm looking at a PTP650 link which is right on the cusp between 16 QAM 0.87 and 64 QAM 0.75. I'm hoping an extra dBm or two will be enough to stabilize it. The max, mean, min, current transmit power is 25.0, 23.9, 23.0, 24.0 on one side and 27.0, 24.0, 24.0, 24.0 on the other.
What causes the BHs to not broadcast at a full 27 dBm, and what can I do to remedy that?