Specifications

Installation
MICOM-H Owner’s Guide 59
External Speaker
Installation
An external speaker can be connected to the radio. Any speaker with an impedance
greater than 8
Ω can be used, and is connected through the accessory connector (pin
1,3).
Operational Checks
When installation is complete, carefully check all operating functions (refer to the
Operation section). In case of malfunctioning, refer to the sections on
Troubleshooting and Tuning the Antenna in this manual.
Connectors
Microphone
Connector J1
The microphone connector is located on the lower part of the radio front panel. Table
1 lists the functions of the microphone connector pins.
Antenna
Connector J2
The “N type” antenna connector is located on the rear panel of the transceiver and is
used to connect the antenna.
Table 1. Connector J1, Pin Connections
No. Pin Name Description
1
SWA+
Microphone Power
2
RXD
Serial communication
3
TXD
Serial communication
4
GND
Ground line
5
MIC AUDIO
Input audio signals generated by the microphone (600Ω
ΩΩ
Ω
impedance, 100 mV 1 KHz tone is required for full output
power)
6
PTT MIC
Activates transmission by short to ground
7
MONITOR
Mutes the speaker before transmission is enabled (short
momentary to ground to open speaker)
8
AUDIO OUT
Receive audio 600Ω
ΩΩ
Ω (300 mVRMS)