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Raytheon Synapsis Radar Nautoscan NX Manual

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Synapsis Radar
with Nautoscan NX Pedestal
Operator Manual
Edition May 2016
2-197
4344.DOC020102
2.7.7 Performance Monitor (PMU)
WARNING
No target evaluation possible.
Please note that the actual target evaluation during the
active PMU test (PMU ON) is not possible.
The transmitted power from the magnetron is measured permanently during TX
mode.
If the actually measured TX-power is less than half of the power during first
installation or prior magnetron exchange a permanent warning message will be
generated. After exchanging the magnetron the warning message disappear
automatically.
With pressing the PMU soft button the receiver performance will be checked as
well.
Pressing this button a noise source injects a broadband microwave signal into
the receiver. Hence follows an increase in the radar video level. This level will
be compared to the corresponding level stored during first installation. A
decrease in sensitivity by more than 7dB will cause an alarm message.
Operator controls
Task
Step 1 Open the FUNC menu.
Step 2 Select the PMU OFF button.
Pressing the soft button the reference level is compared
to the actual level.
In this case targets and land contour will be fading out.
The PMU abbreviation flashes in the lower PPI side.
The increased noise level is to been on the PPI.
Step 3 Select the PMU ON button.
Targets and land contour will be fading in again.
… 237 …


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