Rohde & Schwarz SML01, Руководство по эксплуатации

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Possible Error Sources R&S®SML / R&S®SMV03
1090.3123.12 E-6 9.8
Possible Error Sources
The error messages issued by the continuous monitoring of diagnosis points are described in the
following table. Troubleshooting should be performed according to the order given in the table since an
error mentioned further down could be caused by those above.
Table 9-1 Error messages of hardware monitoring
Displayed message Error Possible source
174,“Reference PLL
unlocked“ The PLL of the
800 MHz reference
oscillator on the main
board is out of
synchronization:
= > Output frequency
not correct If unit is set to external reference:
- No external reference signal at the 10 MHz REF
connector (rear of unit)
-
Level or frequency of external reference does not
correspond to data sheet value
175,“Main PLL
unlocked“ The PLL of the main
oscillator on the main
board is out of
synchronization:
=> Output frequency
not correct
-
Calibration is missing or erroneous for example
after an exchange of modules or batteries
110,“Output
unleveled; OPU1“ The level control for the
output level on the main
board is switched off:
=> Output level not
correct - Level outside the specified range
- Overload at AM-EXT-DC
Calibration is missing or erroneous for example after
an exchange of modules or batteries
Error messages issued as a result of loss of data, for example on exchanging a battery or software
update are listed in the following table.
Table 9-2 Error messages as a result of loss of data
Displayed messages Error Possible source and troubleshooting
-313,"Calibration
memory lost ;
XXXXXXXXX",
1
Internal calibration data
are missing - Data loss due to low battery voltage
-
Data loss due to software update
- Data loss due to "Factory Preset"
Possible troubleshooting:
- Perform internal calibration (see chapter 4)
-313,"Calibration
memory lost;
Reference Oscillator", Calibration value is
missing - Loss of non-volatile EEPROM data
Possible troubleshooting:
-
Adjustment of 10 MHz reference frequency
(see R&S SML / R&S SMV03 service manual)
-315,“Configuration
memory lost“ One or more EEPROM
data blocks are missing
-
Loss of non-volatile EEPROM data
1
where XXXXXXX indicates the name of the missing calibration : IF Filter, Main Loop, Harmonic Filter,
Mult Filter, Level Preset, Lfgen Level, FM Offset