Doppler Weather Radar - METNET - India Meteorological Department

2. Summary of the test method
The antenna peak power will be observed at the forward power 30 dB coupler on the top of
the pedestal, which feeds the Antenna. A test cable with calibrated loss will be used along with a
calibrated Power Meter. A special test program will be used in the RCP8 computer to create
constant Transmitter Triggers. The Peak power out will be measured.
3. Test procedure
Antenna Peak Power
(1) Start the system and run the system in the normal operating state.
Elevation
Rotary Joint
Directional
Coupler
Fixed Attenuator
(30dB)
RF
Power Meter
Figure C.5
(2) Run the signal processor testing program, Set pulse width and PRF.
(3) Press the “High voltage On” button to switch on high voltage.
(4) Connect the RF power meter, Agilent N1921A, through a 30dB fixed attenuator to the
forward power connector of the directional coupler as shown in the above Figure 17.
(5) Measure the Peak RF Power.
(6) Press the “High voltage Off” button to switch off high voltage.
4. Test result
PRF and peak power are to be measured for both long pulse and short pulse and recorded.
C.3. ARC Detector Test
This test is conducted to check the detector circuitry functionality.
1. Perform RDA power-down procedures given in 6.52 of manual 510 (given below)
2. Press the LOCAL/REMOTE CTRL switch on the Tx Control panel so that the local
control indicator lights..
3. Press the ARC TEST switch on the TX control panel.
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