CC2500 output power settings

No idea myself about the registers, but i think there has been discussion about it in the past?

From my side, what I can confirm and reported in the past is that for my module Range Check for Frsky (or lowest power setting using Deviation Frsky), has much much more emission power compared to the original Frsky Range Check with original equipment. With my homebrew field strength meter, it has see still significant emitted power ! while the original frsky range check I almost measure no field strength with my meter. (however I can't give any absolute nrs) So range check function in deviation Risky is useless.

Maybe Frsky disable the complete PA in range check ? It may also be that there are diffences in the PA/LNA stages between modules? Myself I have the unshielded cc2500 module,"skyartec", it is not anymore listed at Banggood.

Yes that could be however I can just see from field strength meter comparing my original Frsky DHT-U to Deviation Frsky D protocol, that in rangecheck, deviation has way more emitted power than original Frsky DHT-U. So I believe there is some issue at least in power.


Further between protocols there seem also big differences in field strength, from what can remember Frsky and Flysky were the strongest on the meter. So 100mW for one protocol not give same signal on the meter than for the other protocol.

hmm not so clear how do you get to these output levels? yyou measured them or did you calculate and used fixed gain for PA?
The max power setting 57.17mW is also much lower than the 100mW which is tyical for RC systems?

yes but antenna gain is pretty useless for the average flyer who do not take care of pinting antenna. So practically we can fly as far as the lowest radiated direction area of the antenna.....
Anyway i think your change make sense, I can check it for Frsky D-series esecially range check as I beleive is important to have it low power equally to real frsky, whic is currently not.

it could be debated to otherwise to make just a scale without mentioning the RF ower in mW. but rangecheck, low, medium, normal, highest. or whatever just nr 1-10