CAUTION:DO NOT short pin 1 to ground as
this can damage the internal 8 V regulator.
PIN NO. FUNCTION
DESCRIPTION
1
• When HM-151 is connected
• When HM-103 is connected
3
8
+8 V DC output
Max. 10 mA
2
Frequency up
Ground
Frequency down
Ground through 470
HM-151 connection
Goes to ground to connect
3
HM-151 connection
Open to pin 8 as SQL
HM-151 data
Control signal input
PIN NO. FUNCTION
DESCRIPTION
1 +8 V DC output
Max. 10 mA
2
Frequency up
Ground
Frequency down
Ground through 470
8
Squelch open
“LOW” level
Squelch closed “HIGH” level
D Microphone connector
Comments to this Manuals