Hi,
Ah, good. It looks like you had to change
trf6151_pll_tx() quite a bit.
Is there anything there that you are unsure of? Something I can test?
No, I looked at it again this morning and it looks fine.
You can try to enable the warning (define at the top of the file)
It shouldn't throw any (check that DCS is disabled in your mobile config or
else it will throw some when doing power measurement in a bad band for your
phone).
> But obviously I couldn't test with a real BTS
(because I'm not in the US
> and the racal 6103e doesn't support GSM850)
I'll experiment with OpenBTS and try both GSM900
and GSM850
configurations.
Ah yes, I guess I could test with OpenBTS as well.
Well, I can monitor the uplink frequency and compare
the signal
amplitude between the standard Motorola firmware and the osmocom code.
If there is still a weak signal problem, it should be fairly obvious.
Yes, but with _fft software alone it's not easy because RACH is very short
and so what you see on the screen is not really the power.
A real analyzer can be set to trigger on power level to capture 'only' the
RACH and analyze the power in that.
A time graph might work tough. (or possibly waterfall with a very short fft
size).
If you have any other ideas, I'd be glad to test
them out. I'll at
least try the above and figure out how strong the tx signal is. Not
sure what I can do after that though.
You can look at the parameter chosen in the trf pll settings (A / B / Band)
and post them here along with the ARFCN so I can check if they've been
selected correctly.
I don't have much other ideas.
Cheers,
Sylvain