MANUAL P/N 900000025 REV A
13
5 Maintenance
and
Troubleshooting
There is no preventive maintenance required for the IBU-240. Moreover, no
periodic calibration is required.
SYMPTOM POTENTIAL
CAUSE CORRECTIVE
ACTION
No signal
outputs
1. There is no input
reference.
2. The Reference Select
switch is selecting
Reference B and no
source is connected to
the Reference B input.
1. Connect the reference
input.
2. Select an internal source.
Fault light is
illuminated
1. The input signal level is
too low.
2. There is a failed output
driver.
3. There is an excessive
load on one or more
outputs.
4. The output level is
adjusted too low.
1. Increase the input signal
level.
2. Return unit to factory for
repair.
3. Disconnect the output
loads one by one until the
overloaded output is
isolated. Outputs should
not have loads < 50 ohm.
4. Isolate the low output level
and adjust for a level > 10
dBm.
