The sweep signal passes through both an LPF and a BPF on its journey from the clock generator to the detector. As the 20m and 17m LPFs are different one should expect to see some differences in those two sweeps.
I've found inconsistent date from "Hardware tests" - "RF filter sweep" (not the garbage described in different threads). QMX Rev. 2, FW 1_00_017 sweep 20 m and 17 m Both are using BPF 3. So the values of both sweeps should be the same for same frequencies. But the values are very different, e.g. -16 dB / -10 dB @ 14 MHz; -18 dB / -5 dB @ 18 MHz. Also the shape of the chart looks very different.
At all the max values are significant lower than the values from my low band QMX (Rev. 1).
It seems there is something fishy with the RF filter sweep.
