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400 SERIES MAINTENANCE MANUAL Page 5-15
P/N 190-00140-05 Rev. C
3. Transmit Mode: +14/+28 Volt Radios (J2-11 and 12):
Voltage _________ (+ 13.75 V)
Tolerance _________ (
r
0.2 V)
Max Current Avg
1
_________ (6.0 A)
5.7.2.2 RF Power Out
1. Set input voltage to 27.5 VDC (10 W, 28V units only) in TX mode at Pins J2-11 and 12.
2. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 10 Watts Min (-0 dB)
127.50 MHz _________ 10 Watts Min (-0 dB)
136.50 MHz _________ 10 Watts Min (-0 dB)
3. Set input voltage to 13.75 VDC (10 W, 14/28V units only) in TX mode at Pins J2-11 and 12.
4. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 10 Watts Min (-0 dB)
127.50 MHz _________ 10 Watts Min (-0 dB)
136.50 MHz _________ 10 Watts Min (-0 dB)
5. Set input voltage to 27.5 VDC (16 W units) in TX mode at Pins J2-11 and 12.
6. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 16 Watts Min (-0 dB)
127.50 MHz _________ 16 Watts Min (-0 dB)
136.50 MHz _________ 16 Watts Min (-0 dB)
7. Verify that there is no more than 3 watts variation among the three values in steps 2, 4, and 6.
______OK
1
TX adjusted for a 10 watt carrier 80% AM, 1 KHz (both 10 and 16 watt versions).