Self-calibration adjusts the PXIe-5841 for variations in the module environment using an onboard high-precision calibration tone.

PXIe-5841 modules are externally calibrated at the factory; however, you should perform a self-calibration in any of the following situations:

  • After first installing the PXIe-5841 into your chassis
  • After any module in the chassis is installed, uninstalled, or moved
  • When the system is in an environment where the ambient temperature varies or the module temperature has drifted more than ±5 °C from the temperature at the last self-calibration
  • To periodically adjust for small performance drifts that occur with product aging
Note Allow the module to warm up for 30 minutes after the PXI Express chassis has powered on and the operating system has completely loaded before you use the module or perform self-calibration.
Note Disconnect external RF and LO (RF IN/RF OUT and LO IN/LO OUT) port cables prior to self calibration for best performance. If this is not possible then make sure external devices are turned off or in idle state and not transmitting. Performing self-calibration while connected in direct loopback configuration from RF OUT to RF IN is not recommended.