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Alexander Chemeris alexander.chemeris at gmail.comHi Gillian, So, I see you've ported umtrx_lms.py to the board you're using? If you want to share your port with the community, I'm happy to merge your changes to our git. I think we could even create a separate git repo for umtrx_lms.py in this case. Regarding your question. It might help if you post here output from umtrx_lms.py and umtrx_ctrl.py at the maximum verbosity (say, 10). The value is set at the top of the files for now. In general, I think you should check that you've enabled proper blocks in LMS and enabled SPI clocks for them. If this doesn't work - check with the manufacturer of your board. I have no idea which board do you use, but the manufacturer may have intentionally or unintentionally break tuning abilities of the chip, On Mon, Oct 8, 2012 at 3:51 PM, Gillian Seed <gillian.seed at outlook.com> wrote: > Hi, > I'm having a problem while trying to do a LPF Bandwidth tuning as described > in a Programming and Calibration guide page 40, figure 4.5 and on > https://github.com/chemeris/UHD-Fairwaves/blob/fairwaves/umtrx/host/utils/umtrx_lms.py#L433. > Currently it seems to always fail when it's trying to find the VCOCAP value. > I'm only getting Low printed before it fails. I was wondering why it takes a > 320MHz frequency, because it's not described anywhere in the documents, > could I try to do a bandwidth tuning with some other frequency as well? I'm > running my code in a following order > (http://lists.osmocom.org/pipermail/umtrx/2012-July/000075.html), > > Example setup for ARFCN 925: > > Initialization and auto-calibration: > ./umtrx_lms.py --lms 1 --lms-init > ./umtrx_lms.py --lms 1 --lms-tx-enable 1 > ./umtrx_lms.py --lms 1 --lms-rx-enable 1 > ./umtrx_lms.py --lms 1 --pll-ref-clock 26e6 --lpf-bandwidth-code > 0x0f --lms-auto-calibration > > RX LNA and RXVGA2 selection and gain control > ./umtrx_lms.py --lms 1 --reg 0x75 --data 0xf0 > ./umtrx_lms.py --lms 1 --reg 0x65 --data 10 > > TX LPF control > ./umtrx_lms.py --lms 1 --reg 0x34 --data 0x3e > > LO leakage cancellation (calibration data values may vary) > ./umtrx_lms.py --lms 1 --reg 0x42 --data 0x67 > ./umtrx_lms.py --lms 1 --reg 0x43 --data 0x89 > > TX/RX PLL charge pump current > ./umtrx_lms.py --lms 1 --reg 0x16 --data 0x93 > > Tuning > ./umtrx_lms.py --lms 1 --lms-rx-pll-tune 925.2e6 > ./umtrx_lms.py --lms 1 --lms-tx-pll-tune 880.2e6 > > TXVGA2 gain to max and enable PA > ./umtrx_lms.py --lms 1 --reg 0x45 --data 0xc8 > ./umtrx_lms.py --lms 1 --lms-pa-on 2 > > -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru