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Thomas Tsou thomastsou at gmail.comOn Fri, Jul 20, 2012 at 6:09 PM, Alexander Chemeris <alexander.chemeris at gmail.com> wrote: > On Fri, Jul 20, 2012 at 10:22 PM, Thomas Tsou <thomastsou at gmail.com> wrote: >> There are still other calibration issues, but phase noise is probably still >> a concern. > > You mean LO leakage and I/Q balance? Have you calibrated them? They're > very easy to do - I could guide you with Skype if needed. LO leakage is calibrated. I/Q balance is not. Are there steps for this somewhere? I read 4.10 in the calibration guide, but I'm still not sure how to proceed. >> I also still have errors with auto calibration. > > Well, you haven't enabled Rx chain in LMS and thus it's reasonable > that Rx-related calibration is failing. You should do "--lms-rx-enable > 1" before you try to do anything with Rx. Hmm. Similar error. Thomas -------------- next part -------------- [ttsou at ovid utils (umtrx)]$ ./umtrx_lms.py --lms 1 --lms-init [ttsou at ovid utils (umtrx)]$ ./umtrx_lms.py --lms 1 --lms-tx-enable 1 [ttsou at ovid utils (umtrx)]$ ./umtrx_lms.py --lms 1 --lms-rx-enable 1 [ttsou at ovid utils (umtrx)]$ ./umtrx_lms.py --lms 1 --reg 0x34 --data 0x3e [ttsou at ovid utils (umtrx)]$ ./umtrx_lms.py --lms 1 --pll-ref-clock 26e6 --lpf-bandwidth-code 0x0f --lms-auto-calibration LPF Tuning... DC_REGVAL = 29 LPF Bandwidth Tuning... FREQSEL=47 VCO_X=16 NINT=196 NFRACK=7743330 VOVCO[0]=2 VOVCO[1]=2 VOVCO[2]=2 VOVCO[3]=2 VOVCO[4]=2 VOVCO[5]=2 VOVCO[6]=2 VOVCO[7]=2 VOVCO[8]=2 VOVCO[9]=2 VOVCO[10]=2 VOVCO[11]=2 VOVCO[12]=2 VOVCO[13]=2 VOVCO[14]=2 VOVCO[15]=2 VOVCO[16]=2 VOVCO[17]=2 VOVCO[18]=2 VOVCO[19]=2 VOVCO[20]=2 VOVCO[21]=2 VOVCO[22]=2 VOVCO[23]=2 VOVCO[24]=2 VOVCO[25]=2 VOVCO[26]=2 VOVCO[27]=2 VOVCO[28]=2 VOVCO[29]=2 VOVCO[30]=2 VOVCO[31]=2 VOVCO[32]=2 VOVCO[33]=2 VOVCO[34]=2 VOVCO[35]=2 VOVCO[36]=2 VOVCO[37]=2 VOVCO[38]=2 VOVCO[39]=2 VOVCO[40]=2 VOVCO[41]=2 VOVCO[42]=0 Norm VOVCO[43]=0 VOVCO[44]=0 VOVCO[45]=0 VOVCO[46]=0 VOVCO[47]=0 VOVCO[48]=0 VOVCO[49]=0 VOVCO[50]=0 VOVCO[51]=0 VOVCO[52]=1 Low VOVCO[53]=1 VOVCO[54]=1 VOVCO[55]=1 VOVCO[56]=1 VOVCO[57]=1 VOVCO[58]=1 VOVCO[59]=1 VOVCO[60]=1 VOVCO[61]=1 VOVCO[62]=1 VOVCO[63]=1 START=42 STOP=51 SET=46 code = f f f RCCAL = 7 Tx LPF DC calibration... Error: DC Offset Calibration does not converge! Rx LPF DC calibration... DC_REGVAL = 63 Error: DC Offset Calibration does not converge! RxVGA2 DC calibration... DC_REGVAL = 29 Error: DC Offset Calibration does not converge! [ttsou at ovid utils (umtrx)]$