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Diffstat (limited to 'host/docs/calibration.rst')
| -rw-r--r-- | host/docs/calibration.rst | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/host/docs/calibration.rst b/host/docs/calibration.rst index 14e66a312..1945c4dd5 100644 --- a/host/docs/calibration.rst +++ b/host/docs/calibration.rst @@ -7,10 +7,10 @@ UHD - Calibration Application Notes ------------------------------------------------------------------------ Self-calibration ------------------------------------------------------------------------ -The UHD comes with several self-calibration utilities for minimizing IQ imbalance and DC offset. +UHD comes with several self-calibration utilities for minimizing IQ imbalance and DC offset. These utilities perform calibration sweeps using transmit leakage into the receive path (special equipment is not required). -The results from a calibration are written to a csv file in the user's home directory. +The results from a calibration are written to a CSV file in the user's home directory. UHD will automatically apply corrections at runtime when the user re-tunes the daughterboard LO. Calibration results are specific to an individual RF board. @@ -21,21 +21,20 @@ the user should re-apply the desired setting every time the LO is re-tuned. UHD comes with the following calibration utilities: - * **uhd_cal_rx_iq_balance:** - mimimizes RX IQ imbalance vs LO frequency - * **uhd_cal_tx_dc_offset:** - mimimizes TX DC offset vs LO frequency - * **uhd_cal_tx_iq_balance:** - mimimizes TX IQ imbalance vs LO frequency - + * **uhd_cal_rx_iq_balance:** - mimimizes RX IQ imbalance vs. LO frequency + * **uhd_cal_tx_dc_offset:** - mimimizes TX DC offset vs. LO frequency + * **uhd_cal_tx_iq_balance:** - mimimizes TX IQ imbalance vs. LO frequency The following RF frontends are supported by the self-calibration utilities: * WBX transceiver board * SBX transceiver board - * more to come... + * RFX transceiver board ******************************************** -Calibration utilities +Calibration Utilities ******************************************** -UHD installs the calibration utilities into <install-path>/bin. +UHD installs the calibration utilities into **<install-path>/bin**. **Disconnect** any extrernal hardware from the RF antenna ports, and run the following from the command line. Each utility will take several minutes to complete. @@ -48,14 +47,22 @@ Each utility will take several minutes to complete. See the output given by --help for more advanced options, such as: manually choosing the frequency range and step size for the sweeps. +**Note:** +Your daughterboard needs a serial number to run a calibration utility. Some older daughterboards +may not have a serial number. If this is the case, run the following command to burn a serial number +into the daughterboard's EEPROM: +:: + + <install dir>/share/uhd/utils/usrp_burn_db_eeprom --ser=<desired serial> --args=<optional device args> + ******************************************** -Calibration data +Calibration Data ******************************************** Calibration files are stored in the user's home/application directory. They can easily be moved from machine to another by copying the "cal" directory. Re-running a calibration utility will replace the existing calibration file. The old calibration file will be renamed so it may be recovered by the user. - * **Unix:** ${HOME}/.uhd/cal/ + * **Linux:** ${HOME}/.uhd/cal/ * **Windows:** %APPDATA%\\.uhd\\cal\\ |