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Pin Number
Function
1
Ground
2
(no connection)
3
Composite Out (sample of stereo generator output)
4
FSK In (Normally high; pull low to shift carrier frequency
approximately 7.5 kHz. Connect to open collector or relay
contacts of user-supplied FSK keyer.)
5
/Auto Carrier Off (Pull low to enable automatic turnoff of
carrier with program failure.)
6
Meter Battery (unregulated DC voltage; 5 volts = 50 VDC)
7
Meter RF Watts (1 volt = 100 watts)
8
Meter PA Volts (5 volts = 50 VDC)
9
/Ext. Enable (Pull low to disable internal stereo generator
and enable External Composite Input.)
10
a) 38 kHz Out (From stereo generator for power supply
synchronization.)
b) For transmitters equipped with tuner option, this pin
becomes the right audio output for an 8–ohm monitor
speaker. 38kHZ Out is disabled.
11
ALC
12
/Carrier Off (pull low to turn carrier off.)
13
Fault Summary (line goes high if any fault light is
activated.)
14
Meter PA Temperature (5 volts = 100 degrees C.)
15
Meter PA Current (1 volt = 10 amperes DC.)
Illustration 2–17 Remote I/O Connector (DB-15 Female)
Installation
1
8
15
9
2–15
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