Universal Keying Adapter 3
05/05/2013
Page 8 of 10
Using JP1
You can build your UKA-3 into your own equipment, or in a custom enclosure if you
wish. The JP1 connector can be used to connect to your equipment without using the
connectors. Connections should be made as follows:
JP1 Pin
Function
PWR+ / GND
Power input. This is used to supply
DC power only
to the UKA-3,
and is not switched.
Do not apply AC power to these points
.
IN LO / GND
Low keying input, same as the tip of the stereo connector. Ground
to transmit.
IN HI / GND
High keying input, same as the ring of the stereo connector. A
positive voltage of 3V or more will transmit.
P LED / GND
Power LED indicator output; ~ 4.7V DC current limited with a 220
Ohm resistor when power is applied.
K LED / GND
Keyed LED indicator output; ~ 4.7 V DC current limited with a 220
Ohm resistor when the output is active (keyed).
+ OUT
Connected to the center pin of the OUT RCA connector. May or
may not be polarity sensitive, depending on build option selection.
- OUT
Connected to the outer shell of the OUT RCA connector. May or
may not be polarity sensitive, depending on build option selection.
