User's Manual

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12-F About SEND Interface
Circuit
TX/RX switch terminal (SEND socket) is
controlled through photo-MOS relay rather than
thru direct relay switching. Open voltage is
+12V, and draws 10ma when grounded. When
PROTECTION trips, photo-MOA relay for TX
Inhibit becomes open and TX is shut down
From TX
inhibit
To relay
To control
circuit
+12V
SEND(RCA)
CONT14pin
1k
Ω
12-G ALC Interface
When the sum of forward output power (voltage) and
reflected output power (voltage) exceeds the
programmed ALC level, negative voltage is produced
at ALC terminal.
ALC circuit consists of an Ope-amp, and it is
preferable that input port of the transceiver for the
external ALC voltage has an input impedance of 10K
Ω
minimum.
Maximum ALC output of -10V is usually produced.
Some of old fashioned radio may require higher
voltage. Built-in gain switch needs switched in that
case.
Relay
12-H About ICOM CI-V Interface
Circuit
CONT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3.5mmPHON
O PULG
CI-V signal lines are connected to pins 7, 8
and 15 of CONT Connector.
Circuit
１２ Technical Information about Various Connectors