LMS6002DCalibration

Alexander Chemeris alexander.chemeris at gmail.com
Wed Jul 10 14:59:21 UTC 2013


Jiang,

These files are internal for UHD and should be used by UHD automatically.

I recommend you to calibrate the LMS chip itself, as described in
LMS6002Dr2-Programming and Calibration Guide:
https://github.com/chemeris/lms6002-documentation

For sccessing LMS registers and some common operations you could use
umtrx_lms.py script from this repo:
https://github.com/fairwaves/umtrx_scripts/tree/master/python_lib
Note, that automatic calibrations are performed by UHD automatically
on every start.

On Tue, Jul 9, 2013 at 4:15 PM, jiangwy <wyjiang at ljshuoda.com> wrote:
> Hi All,
>
> I use the following functions to calibration
> uhd_cal_tx_dc_offset
> uhd_cal_tx_iq_balance
> uhd_cal_rx_iq_balance
>
> I got three *.csv files in .uhd/cal/{rx_iq_cal_v0.1_38.A.csv
> tx_iq_cal_v0.1_38.A.csv  tx_dc_cal_v0.1_38.A.csv}
> How can I use the contents in these files?
>
> ~$ cat .uhd/cal/tx_dc_cal_v0.1_38.A.csv
> name, TX Frontend Calibration
> serial, 38.A
> timestamp, 1373370847
> version, 0, 1
> DATA STARTS HERE
> lo_frequency, correction_real, correction_imag, measured, delta
> 9.3e+08, 0.0046875, 0.0101563, -105.406, 32.9285
> 9.302e+08, 0.0046875, 0.0101563, -99.0923, 26.9516
> 9.304e+08, 0.0046875, 0.0101563, -102.352, 29.6946
> 9.306e+08, 0.0046875, 0.0101563, -104.045, 31.523
> 9.308e+08, 0.0046875, 0.0101563, -103.354, 30.8814
> 9.31e+08, 0.0046875, 0.0101563, -108.024, 35.4699
> 9.312e+08, 0.0046875, 0.0101563, -110.951, 38.5388
> 9.314e+08, 0.00546875, 0.0101563, -99.2159, 26.6738
> 9.316e+08, 0.0046875, 0.0101563, -103.085, 30.5324
> 9.318e+08, 0.00546875, 0.0101563, -104.854, 32.0656
> 9.32e+08, 0.0046875, 0.0101563, -111.759, 38.9142
> 9.322e+08, 0.0046875, 0.0101563, -101.731, 29.0089
> 9.324e+08, 0.0046875, 0.0101563, -107.722, 35.0989
> 9.326e+08, 0.00546875, 0.0101563, -107.25, 34.6358
> 9.328e+08, 0.0046875, 0.0101563, -109.739, 37.0523
> 9.33e+08, 0.0046875, 0.0101563, -111.463, 38.951
> 9.332e+08, 0.0046875, 0.0101563, -112.302, 39.8637
> 9.334e+08, 0.0046875, 0.0101563, -110.057, 37.4139
> 9.336e+08, 0.0046875, 0.0101563, -103.617, 31.0364
> 9.338e+08, 0.0046875, 0.0101563, -104.47, 31.8644
> 9.34e+08, 0.00546875, 0.0101563, -103.053, 30.3361
> 9.342e+08, 0.0046875, 0.0101563, -106.426, 33.7277
> 9.344e+08, 0.0046875, 0.0101563, -112.463, 39.6667
> 9.346e+08, 0.0046875, 0.0101563, -106.765, 34.1277
> 9.348e+08, 0.00546875, 0.0101563, -126.977, 54.3251
> 9.35e+08, 0.00546875, 0.0101563, -103.487, 30.8681
>
> ________________________________
> Jiang Wenyi



-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru




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