User's Manual

Table Of Contents
ED 3100 G 140 / 04 (2011-11)
Operating Instructions
H-1 Performance Monitor
H MAINTENANCE.fm / 10.11.11
H-3
NACOS Platinum
1 Performance Monitor
Note:
The Performance Monitor is only present in systems with Radar Platinum.
Background
The performance monitor provides the operator with a simple go/no-go tool to check the transmitter
performance as well as the receiver sensitivity in one step. It comprises a small test oscillator and a
microwave diode with amplifier. Both modules are installed under a hole in the gearbox. The hole is
hermetically sealed with a transparent plastic cover.
The diode receives the radar pulse which is transmitted by the magnetron via waveguide and scanner
into the air. The received signal is amplified and gives an indication about the function of the complete
transmitter path.
The test oscillator transmits a pulse at about 1 msec after the main pulse. This pulse lies outside the
display space and is not visible in the radar image. It simulates a target being far away. This signal is
picked up by the scanner and gives an indication of the proper function of the complete receiving path.
Test
The selected transceiver´s performance can only be
tested by the MFD which is selected as Master for it. If
Master is not selected, the Adjust control will be insen-
sitive. Click the Transceiver Adjust control, the corre-
sponding submenu will open. Check the control for
Performance Monitor. Wait for a minute, the result
will be shown as follows:
- If the sum of both indications from TX and RX path
together is ok, the test is shown with an Ok in the
Transceiver Adjust box.
- If the sum of both indications from TX and RX path
is degraded, the test is shown with a Critical result.
- If the sum of both indications from TX and RX path
is degraded by more than 10 dB, the test is shown
with a Most Critical result.
Switch off the performance monitor by closing the Transmitter Adjust box.
During the test, the radar is fixed to 12 nm and cannot be switched to another range. Do
not start the performance test with a cold transceiver, wait 30 min after switching-on. The
test result could be disturbed by heavy snowfall or rain, shading the hole in the gearbox.
The test result could also be disturbed by other transceivers on-board. They should be
switched off.
If "Most Critical" is shown as the result, this means that the performance quality
of the radar system is no longer adequate for safe radar operation. Request
service!