On Mon, Jun 18, 2012 at 1:31 AM, Alexander Chemeris alexander.chemeris@gmail.com wrote:
Nothing really tested yet. At least you should do this steps: ./umtrx_lms.py --lms 1 --lms-rx-enable 1 ./umtrx_lms.py --lms 1 --lms-rx-pll-tune 925e6 ./umtrx_lms.py --lms 1 --pll-ref-clock 26e6 --lpf-bandwidth-code 0x0f --lms-auto-calibration
Then you need to select Rx input with register 0x75. Should be something like this: ./umtrx_lms.py --lms 1 --reg 0x75 --data 0xF0
There are a lot of other settings for Rx fontend in LMS which I don't understand, but I guess defaults should be fine for the start. Then we could tune them with Andrey's help.
If signal is too low you may need to tune Rx VGA2 gain with the register 0x65 (refer to the programming guide for the register values encoding).
Connected a call - all seven actually. It's quite stable once setup.
'fairwaves/umtrx' branch with u2plus_umtrx-20120424.bit and following patch. I and Q were swapped.
Thomas