Chapter 3: Service & maintenance
68 Diagnostics
* Marked log entries are not necessarily an error but will reduce output
power to protect the equipment.
TU: LO Error Local Oscillator is not
within valid range.
Local Oscillator not locked
ATU: Not Tuned ATU did not find a proper
matching to the antenna
resulting in less power
out.
Poor antenna connection
grounding etc.
ATU: No Tune
Power
Too little power present
at ATU to tune properly.
Too long antenna cable or too
much loss in the antenna cable
ATU: High U/I* High current or voltage
present at ATU causing
reduced power output.
Too short antenna and or feed
wire or poor matching by ATU
ATU: High Temp* High Temperature inside
ATU.
Prolonged transmission or bad
SWR match
ATU: Bad SWR* ATU measures SWR > 8. Bad antenna installation or
standing waves
ATU: High SWR* ATU measures high SWR. Bad antenna installation or
temporarily bad SWR due to
weather or sea etc.
ATU: No Comm. ATU does not
communicate properly.
Very long antenna cable of
wrong dimension, or ATU
defective. This can also occur
temporarily when turning on
the radio, until the ATU is
ready.
Text in the
display
Explanation Possible cause(s)
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