I am running firmware 1.05 on the V3 board, and the problem is pretty obvious, with FST4W-300 being unusable (one tone is entirely skipped over):
The 0.180 Hz tone spacing of FST4W-900 is even worse (only two tones output):
As a measurement check here is the FST4W-900 output from my IC-7200:
All measurements made with my home-built Time Interval Counter, using the internal digital mixer to translate the RF frequency down into the audio-frequency range.? The displayed frequency is the mixer output, and somewhat arbitrary.? What matters is the difference frequency of the tones.? These tests were done on the 30-meter band.
I will eventually install V1.06 firmware, but I think Hans would have mentioned it if this had been improved.
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Paul Elliott - WB6CXC
