RADIOBEACON TRANSMITTER
ND500II (125 WATTS) DOUBLE SIDEBAND - NO VOICE
Contents (Page 4)
01 November 2003
TABLE OF CONTENTS
(Continued)
Section
Page
5
TESTING AND ADJUSTMENT
5.1
GENERAL .................................................................................................................. 5-1
5.2
OPERATION OF EQUIPMENT................................................................................... 5-1
5.3
FUNCTIONAL TESTS/CALIBRATION PROCEDURES ............................................. 5-1
5.3.1
FUNCTIONAL TESTS/CALIBRATION TEST EQUIPMENT .................................. 5-1
5.3.2
FUNCTIONAL TESTS/CALIBRATION PREREQUISITES..................................... 5-2
5.3.2.1
Pre-installation Considerations........................................................................ 5-2
5.3.2.2
Transmitter Turn-On ....................................................................................... 5-2
5.3.2.3
B+ DC Voltage (No Load) Check .................................................................... 5-3
5.3.2.4
+24 Volt DC Check ......................................................................................... 5-3
5.3.2.5
+15V Check.................................................................................................... 5-3
5.3.2.6
-12V Check..................................................................................................... 5-4
5.3.2.7
ATU Control Check......................................................................................... 5-4
5.3.3
CARRIER FREQUENCY/RF DRIVE LEVEL AND ALARM CHECKS .................... 5-4
5.3.4
PULSE WIDTH MODULATOR/MOD DRIVE ALARM CHECK............................... 5-5
5.3.5
RF CARRIER CHECKS ........................................................................................ 5-6
5.3.6
MODULATION DEPTH CHECKS ......................................................................... 5-7
5.3.7
IDENTIFICATION/STANDBY CODES .................................................................. 5-8
5.3.7.1
Identification Code.......................................................................................... 5-8
5.3.7.2
Standby '1' and Standby '2' Codes .................................................................. 5-8
5.3.8
SHUTDOWN CHECK ........................................................................................... 5-9
5.3.8.1
Preliminary Shutdown Procedures .................................................................. 5-9
5.3.8.2
Low Carrier Level Fault Threshold Calibration ................................................ 5-9
5.3.8.3
High Carrier Level Fault Threshold Calibration ............................................. 5-10
5.3.8.4
Modulation Depth Fault Threshold Calibration .............................................. 5-10
5.3.8.5
Loss of Keying/Shutdown Delay.................................................................... 5-11
5.3.9
HIGH SWR CUTBACK THRESHOLD CHECKS ................................................. 5-12
5.3.10
OVERMOD ALARM THRESHOLD CALIBRATION ............................................. 5-13
5.3.11
REMOTE CONTROL CHECKS .......................................................................... 5-13
5.3.11.1
Remote On/Off ............................................................................................. 5-13
5.3.11.2
Standby On/Off ............................................................................................ 5-14
5.3.11.3
Remote Power Trim...................................................................................... 5-14
5.3.11.4
Standby 1 and Standby 2 Codes................................................................... 5-14
5.3.12
REMOTE MONITORING CHECKS..................................................................... 5-14
5.3.12.1
Remote Shutdown Alarm .............................................................................. 5-14
5.3.12.2
Remote SWR Alarm ..................................................................................... 5-14
5.3.12.3
Remote Battery Status.................................................................................. 5-14
5.3.13
EXTERNAL DC SOURCE OPERATION CHECK ................................................ 5-14
5.4
SPECIAL CALIBRATION PROCEDURES................................................................ 5-15
5.4.1
TEST METER M1'S DC CURRENT INDICATION CALIBRATION ...................... 5-15
5.4.2
LOW VOLTAGE POWER SUPPLY ON/OFF PWB AC MONITOR CALIBRATION5-16
5.5
OPERATIONAL ADJUSTMENT PROCEDURES ..................................................... 5-16
5.5.1
OPERATIONAL ADJUSTMENT TEST EQUIPMENT.......................................... 5-16
5.5.2
OPERATIONAL ADJUSTMENT PREREQUISITES ............................................ 5-16
5.5.3
TRANSMITTER TURN-ON ................................................................................. 5-17
5.5.4
CARRIER LEVEL ADJUSTMENT ....................................................................... 5-17
5.5.5
MODULATION DEPTH (MCW TONE ONLY) ADJUSTMENT ............................. 5-17
5.5.6
POST OPERATIONAL ADJUSTMENT PROCEDURES ..................................... 5-18
