Functions - Selftest (Maintenance) - Selftest

Select

The Select softkey selects the type of selftest or correction procedure to be performed.

Note:
The Select drop-down list always contains all entries listed below. If the selftest is started for a board that is not available in the unit, a message "<Board_Name> board is not available" is displayed.

System Info	Provides information on the system memory and the hardware and software configuration. If System Info is selected and the Test activated (see below), the CMU lists all deliverable hardware and software options in the report table and indicates whether they are available on your CMU.
System Identity	Scans all modules and stores the part numbers and production data to file c:\identity.dat. In addition the available software versions are written to the log file C:\INTERNAL\LOG\VERSION.LOG.
Continuous Selftest	Continuous combined System Selftest and Internal RF Loop selftest. The continuous selftest is repeated until it is explicitly switched off.
System Selftest	Tests all modules one after another and displays a pass/fail message.
Internal RF Loop Test	Test of frequencies and levels at connectors RF1 and RF2 using the CMU's internal RF generator and analyzer with internal RF coupling.
1->4/3->2 RF Loop T.	Test of frequencies and levels for the RF path between the connectors RF1 –> RF4 IN and RF3 OUT –> RF2. For this test, special external N coax cables (included in service kit CMU-Z3) must be used to close the RF path.

The remaining tests are selftests for individual modules, e.g. Linkhandler (all models of Universal Linkhandler and Universal Signalling Unit), Front End, Reference Board, Digital Board, RXTX Board 1, Audio Board, I/Q-IF Board (Option CMU-B17), Aux Tx Board (Option CMU-B95). Besides, the following correction procedures are available:

Audio Board Calib.	Improves the accuracy of Audio measurements (with option CMU-B41).
FM Modulation Calib.	Improves the accuracy of measurements on FM-modulated signals (e.g. for Bluetooth (CMU-K53), AMPS (CMU-K29)). An FM modulation calibration is also required for generating an FM modulated RF signal in function group RF. To this end, it is sufficient to perform the calibration once after installing the RF software; the CMU will store the calibration data.
Correction Filter Cal.	Improves the accuracy of WCDMA modulation measurements (only with options CMU-K65/…/-K69 (CMU200) or CMU-K75/-K76 (CMU300) and CMU-Z6, see operating instructions for CMU-Z6, stock no. 1150.0199.12).
L1CoPro TX Calib.	Improves the level accuracy of the downlink WCDMA generator (option CMU-K66). Both the TX and the RX path are calibrated. The calibration is particularly important if power measurements at fixed target power are performed; it compensates for a systematic offset of approx. 12 dB.
Internal Aux Tx Loop Test	Same as Internal RF Loop Test, but for the Aux Tx signal (option CMU-B99).
IF 3 Selftest	Internal evaluation if the IF3 level, only available for RXTX board versions with TAZ >= 13.00.

Note: Notice messages after firmware updates
In most cases firmware updates don’t affect the accuracy of the measurements. There are some exceptions where a correction procedure must be executed after the firmware update. The R&S CMU displays a notice message whenever this happens. The box contains the name of the required correction procedure and appears during startup until the correction has been performed.

Remote control-