Re: Spurious Emission Measurement on stock uBitX
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Looking at the “strongest spur frequency” column, 42.4700MHz spur was -41.1dBc at 21.2250MHz row.
However, with AT, the 42.4700 spur was dropped to only -45.6dBc which tendency is different from other bands.
Then looking at the 28.8500MHz rows, 14.4270MHz spur was observed as the strongest without AT, but 43.3000MHz was the strongest spur with AT.
Maybe this Pi-C AT does not work efficiently above 30++MHz?
I don’t know. So additional LFP which cuts above 30MHz may be a good trial.
I’ll do it next time, maybe after casing my uBitX.
// hiro, JJ1FXF