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R & S E K 8 9 5 / R & S E K 8 9 6
User Manual
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Lists of Faults
4.2 Troubleshooting
Note:
Under normal operating conditions the lithium battery in the processor of the VLF>HF receivers
has a service life of at least 5 years. Replacing the battery at regular intervals is therefore not re>
quired. If, however, the basic receiver settings last stored are not reactivated after switch>on and
the channels only contain default values, a battery discharge must be suspected. In this case
measure the battery voltage by means of a high>impedance voltmeter. Make the required prep>
arations in line with 4.3.5.1, as necessary. The nominal no>load voltage is approx. 3.6 VDC. For
voltages below 3.0 VDC the battery must be replaced.
4.2.1 Lists of Faults
4.2.1.1 CM Messages
No. Fault message Possible causes of fault
1 GO no fault
2 SYNTH NOGO f Phase>locked loop (40 MHz) not synchronizing
f Phase>locked loop (5.66 MHz) not synchronizing
f Oscillator level of 2:1 divider (5.66 MHz)
< nominal value
f Phase>locked loops (1st osc.) not synchronizing
3 IF AF NOGO f 20>MHz signal missing
f Oscillator level of 100:1 divider (200 kHz) missing
f Oscillator level of 50:1 divider (400 kHz) missing
f Oscillator level of 10:1 divider (2 MHz) missing
f Phase>locked loop not synchronizing
f Digital signal processor signals a fault via
watchdog line
f HF input inhibited due to overload
4 SYNTH+IF AF NOGO see 1 and 2
Note:
As soon as a CM message appears on the display, carry out the built>in equipment test
acc. to 4.2.2.4.
6164.0717.02_01
> 4.2 >
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