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f
R & S E K 8 9 5 / R & S E K 8 9 6
User Manual
f
Troubleshooting with Control Unit 1
Via the LED test, functioning of the LEDs RF
UNIT, IF / AF PROCESSOR, SYNTHESIZER, OP>
TION 1 and OPTION 2 is checked.
Æ All LEDs are illuminated.
As soon as one of the LEDs is not illuminated,
f replace control unit 1 ∫REMOTE∫ acc. to
4.3.2.
In the BIT it is first checked whether the mo>
dules synthesizer, HF unit and IF / AF processor
are installed.
Subsequently, a 100>kHz test signal instead of
the antenna signal is fed into the receive path
and the receiver is set to a receive frequency of
100 kHz. The processor evaluates the BIT mess>
ages (BIT criterion) from the HF unit (DC volt>
age of the IF amplifier for the 2nd IF) as well as
the CM messages from the synthesizer (phase>
locked loops and oscillator levels of various
dividers, phase>locked loop, 20>MHz signal,
watchdog of the DSP and overload at the HF
input).
A defective module is indicated by illumination
of the respective LED.
If the LED SYNTHESIZER is illuminated,
f replace synthesizer acc. to 4.3.6.
If the LED RF UNIT is illuminated,
f replace HF unit acc. to 4.3.7.
If the LED IF / AF PROCESSOR is illuminated,
f replace IF / AF processor acc. to 4.3.9.
HF>TEIL
.
RF UNIT
ZF / NF PROZESSOR
.
IF / AF PROCESSOR
SYNTHESIZER
OPTION 1
OPTION 2
Example: synthesizer defective
HF>TEIL
.
RF UNIT
ZF / NF PROZESSOR
.
IF / AF PROCESSOR
SYNTHESIZER
OPTION 1
OPTION 2
6164.0717.02_01
> 4.16 >
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