Harris Micromax FM Exciter Installation REV1 01/12/2007
2-5
WARNING: Disconnect primary power prior to servicing
2.4.4 Remote I/O connector (using provided DB15 interface jumper)
Remote control and monitoring of the transmitter is available through a DB15 connector on the rear
panel. Following describes the function of each pin on the remote I/O connector using the provided DB15
interface jumper.
Type: DB15 female (cable end)
1
9
PIN FUNCTION TYPE DESCRIPTION
1 GROUND GROUND
2 FWD POWER OUT analog 0 to 4V Adjustable
3 RFL POWER OUT analog 0 to 4V
4 PA V OUT analog 0 to 4V
5 PA I OUT analog 0 to 4V
6 FAULT OUT digital Output low in Fault condition (adjustable by PgD setting)
7 N/C No connection
8 EXCITER APC INPUT Ext. signal, for power limitation (set by FWD AGC pot)
9 RF MUTE INPUT Short to ground to operate (tied to 14)
10 INTLK COM OUT Relay contacts COM
11 INTLK NC OUT Relay contacts NC
12 INTLK NO OUT Relay contacts NO
13 EXC ON CMD INPUT digital Low pulse (500 ms) enables RF*
14 RF MUTE INPUT Short to ground to operate (tied to 9)
15 EXC OFF CMD INPUT digital Low pulse (500 ms) disables RF
* RF UNMUTES IN A SLOW RAMP UP
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