CMU Troubleshooting
1100.4903.82 3.57 E-4
Troubleshooting using the SELFTEST Menu for Modules
The SELFTEST menu indicate the diagnostic voltages for the individual modules of which the modules
settings are exactly defined. Thus, a specific selftest of the respective module is possible.
This menu additionally features internal RF power measurements which are designed as RF loop with
internal generator and analyzer. This is why a simple RF path is possible.
The selftest menu can be called up via the MENU SELECT key on the front panel of the CMU.
Call the selection BASE via the spinwheel in the MENU SELECT and confirm with ENTER.
The respective selftest can be selected via the softkey SELECT and the spinwheel.
The following selftests are available:
• Continuous Selftest
• Internal RF Loop Selftest
• System Selftest
• FE Selftest
• REF Selftest
• DIG Selftest
• RXTX1 Selftest
• 1Å4/3Å2 RF Loop
(Continous selftest via System Selftest and Internal RF Loop Selftest,
passed/failed with error output is only indicated; additionally in case of
errors, it is created an error file ’cst.err’
∗
)
(Selftest RF path by power measurements via internal generator and
analyzer, in this case all measured values are indicated.)
(Selftest instrument for diagnostic voltages, passed/failed with error
output is only indicated.)
(Selftest Module RF FRONTEND for diagnostic voltages, in this case
all measured values are indicated.)
(Selftest Module REFERENCE BOARD for diagnostic voltages, in this
case all measured values are indicated.)
(Selftest Module DIGITAL BOARD for diagnostic voltages, in this case
all measured values are indicated.)
(Selftest Module RXTX1 BOARD for diagnostic voltages, in this case
all measured values are indicated.)
Selftest RF Path RF1Ã…RF4IN and RF3OUTÃ…RF2 via external
N-coax cable by power measurements via internal generator and
analyser, in this case all measured values are indicated.
After having selected and confirming with the ENTER key, the test can be started by selecting the TEST
softkey and the ON key.
Pressing the REPORT softkey and turning the spinwheel the indicated page can be pulled up and down.
If errors (red color) are produced by this test, the error will be found out and elimated on the respective
module.
∗ Note: You can read the error file ’cst.err’ as follows:
- Connect the external keyboard connector to the rear panel of the CMU.
- Switch on the CMU and wait until the CMU is booted.
- Start the Continuous Selftest (only when errors have occurred, the file ’cst.err’ is created. Don’t finish the Continuous Selftest with OFF, otherwise the ’cst.err’ file will be
deleted.)
- Press the keys ALT and F4 of the external keyboard to get to the DOS mode.
- Read the file with the DOS editor: ’edit cst.err’
- Quit the DOS editor and start CMU operating software with: ’cmu.bat’.
To Next Page
Loading...
Need help?
General
