Copyright 2005 ISC Technologies
7. Turn R48 (BAR GRAPH ADJ) on the logic board so that 100% LED D11 of the bar
graph,just lights up.
8. Turn R52 (HIGH PWR ADJ) on the logic board until the desired HIGH power output is
obtained,
9. Switch OFF the power and install a 3 dB attenuator between the exciter and the power
amplifier. Switch ON the power again and key the exciter.
10. Turn R50 (RF IN LEVEL SET) on the logic board until the RF IN LED D8, just lights up.
11. Install JR28 and verify that LED D8 still turns on. Turn R50 if necessary, until D8 (RF IN
LED) just turns on, then remove JR28.
12. Switch OFF the power, and remove the 3 dB attenuator installed between the exciter
and the power amplifier.
13. Install either JR26 or JR27 to enable the power auto shutdown to either NO POWER or
LOW POWER respectively.
14. Switch ON the power, key the exciter, and connect a 10 Vdc voltmeter to test point TP4
(P 13-1) on the logic board. Turn R51 (TEMP ALARM SET) until the voltage reads 3.0 Vdc.
15. Unkey the exciter and remove the voltmeter.
Caution
The low RF alarm trip point is set by one of jumpers JR12 to JR21. This is set to 20%
with jumper JR20 at the factory. You may increase this setting in 10% steps from
100% to 10% by installing a jumper at one of the JR positions. The 100% position is
jumper JR12, and the 10%position is JR21.
WARNING
DO NOT install more than one alarm trip point jumper at any time, or else the display
driver will be damaged.
16. Switch OFF the power.
17. Install JR26 or JR27 (which ever was installed previously).
18. Disassemble the test equipment, and connect the exciter and power amplifier in its
normal configuration.
