User's Manual

30 kW S-BAND/U ANTENNA GROUP
PREVENTIVE MAINTENANCE
4.7 Rev. C
CARD 5
NOTE
The operations described in this card are necessary only when
the RTM is connected to Display Systems type PRORA,
SELESCAN or MASTERMATE of first generation. For the
NAVBAT and MASTERMATE displays, the adjustment can be
made directly on the display.
UNIT OPERATION PERIODICITY
TRANSCEIVER Trigger Delay Adjustment WR
PERSONNEL REQUIRED INSTRUMENTS REQUIRED TIME
1ST, 1JT Set of screwdrivers, Set of Allen wrenches, Set of
Voice Communication
30 minutes
SAFETY PRECAUTIONS
Follow the standard safety rules
STEP SEQUENCE OF OPERATIONS
NOTE
The voice communication device (telephone set or walkie-talkie) must be
provided between the RTM operator and the Display operator.
WARNING
HIGH VOLTAGES ARE PRESENT INSIDE THE UNIT.
DO NOT OPEN THE CABINET COVER BEFORE THE MAIN LINE
BREAKER HAS BEEN TURNED OFF. ALL WORK PERFORMED ON THE
RTM MUST BE CAREFULLY RECORDED IN THE UNIT LOGBOOK.
BEFORE STARTING ANY MAINTENANCE WORK, IT IS MANDATORY
THAT, FOR THE SAFETY OF PERSONNEL, ALL HIGH-VOLTAGE
CAPACITORS BE SHORT-CIRCUITED BY MEANS OF A WELL INSULATED
SCREWDRIVER OR OTHER SUITABLE TOOL.
BEFORE CONNECTING INSTRUMENTATION USED FOR PERFORMING
MEASUREMENTS INSIDE THE UNIT, IT IS ADVISABLE TO SWITCH OFF
THE POWER SUPPLY. DO NOT ALTER THE SETTING OF THE
SEMIOPERATIVE CONTROLS UNLESS A SPECIFIC ADJUSTMENT IS
REQUIRED AND THE NECESSARY TEST EQUIPMENT IS AVAILABLE.
1. On the Display, set the range selector to the shorter range.
2. Takes as a reference an object that can be detected on the Display and measure
accurately its distance from the Antenna.
3. Ask to the Display operator to read the distance of the object on the Display.
4. Compare the above measurement with the range displayed on the Display
5. If the distances are the same, stop the procedure.
6. If the distances are not the same, operate on the RTM as follow:
− on the Display switch OFF the RTM Unit;
− unscrew the 6 screws (Chapter 9, Figure 9.1.19 pos. 1) locking the front cover
(Chapter 9, Figure 9.1.19 pos. 2) and open the former;
− on the TRANSCEIVER unit, pull the switch SW2 (Chapter 9, Figure 9.1.20 pos.
1);
− on the RTM CONT B Board, perform the jumper P17(Chapter 9, Figure 9.1.22
pos. 1);
− on the RTM CONT B Board, position the selector S1 (Chapter 9, Figure 9.1.22
pos. 2) on position 6;
(Continue)