User's Manual Part 2

Operator Manual
Raytheon Marine GmbH
Germany
R
NSC 18
RADAR
2−135
3748DOC020102Edition: 14.JAN.2005
Figure: 2−77 PMU display for 6 feet X−band
F1
Step 1
Step 2
Step 3
PMU
transmission check
Normal operation
of transmitter power
Degradation of 4 dB in
transmitter power
Info
The dotted lines are only
used to explain the
PMU check.
Result:
By visualizing 4 markers on the radar video in the shape of an arc of a circle, the
performance monitor simultaneously performs the following checks:
− Monitoring efficiency of radar transmission system
− Monitoring efficiency of radar reception system
Monitoring efficiency of radar transmission system
During normal operation of the transmission system, the 4 markers, set to 14,
16, 18 and 20 NM (see Figure: 2−77) must be visible in the radar video.
Degradation of the transmitter power is indicated by a shift of the 4 markers
towards the center of the radar video;
in particular a shift of 4 markers of 2 NM towards the center of Radar Video is
obtained by each degradation of the transmitted power corresponding to 2 dB.