Specifications

Installation
MICOM-H Owner’s Guide 60
Accessory
Connector J3
Accessory connector J3 is a 25-pin D-type plug located on the rear panel of the radio.
It is used with external accessories such as a modem, a linear amplifier, a phone
patch, etc.
If you wish to connect Morse key and headphones using their standard connectors,
use interface cable FKN4403.
To connect up to four devices simultaneously, use FLN2271.
Table 2 lists the pin connections of Connector J3.
Table 2. Connector J3, Pin Connections
No. Pin Name Description
1
SPKR
-
(Do not connect to GND)
Differential output to the external 8Ω, 5W speaker
2
OPTION
Option dependent
3
SPKR+
Differential output to the external 8Ω, 5W speaker
4
RX AUDIO+
Differential output received audio signals (0 dBm;
600Ω; not controlled by volume)
5
RX AUDIO-
(Do not connect to GND)
Differential output received audio signals (0 dBm;
600Ω; not controlled by volume)
6
TX AUDIO+
Differential input received audio signals (600Ω input
impedance, 0 dBm is required for full power)
7
TX AUDIO-
(Do not connect to GND)
Differential input received audio signals (600Ω input
impedance, 0 dBm required for full power)
8
PTT IN VOICE
Xmit command (by short to ground) for voice signals
9
PTT IN DATA
Xmit command (by short to ground) for data signals
10
PTT IN CW
Xmit command (by short to ground) for CW (Morse)
11
SWA+
13.8V (nominal) current limited
12
KW C C
KW option channel change
13
KW ON/OFF
KW option power ON/OFF
14
AGC FAST/SLOW
AGC fast or slow release
15
RXD
Point to point communication line to HOST/HLC
16
TXD
Point to point communication line to HOST/HLC
17
RESET
External RESET
18
GND
Ground
19
KW PTT
KW PTT
20
EXT ALARM
External Alarm Operation (open collector –pulled to
ground when external alarm is activated)
21
VPP
Flash programming voltage
22
KW ALC
KW ALC
23
SQ GATE
Squelch Indication
24
FAN ON/OFF
FAN ON/OFF
25
KW TUNE
KW tune