Control Cable Signals; Terminal Information - Icom AT-140 Instruction Manual

Terminal information

■
Terminal
Key voltage. Grounded during tuning.
[KEY]
Maximum current drain; 100 mA
13.6 V DC + input terminal.
[13.6]
Maximum current drain; 2 A
Receives start voltage.
[STAR]
Maximum current drain; 1 mA
[ANTC] Antenna current detector output.
*The connector's shape may differ,
depending on the version.
Mode switch (S1)

CONTROL CABLE SIGNALS

Description
[KEY]
[STAR]
[13.6]
[E]
[E]
[13.6]
[STAR]
[KEY]
D Start voltage [STAR]
When a start voltage (less than 1 V) is received, the
AT-140 begins automatic tuning.
More than
350 milliseconds*
Start
voltage 8
[V]
6
4
2
0
*For the Tuner Through function; Less than 250 milliseconds
D Key voltage [KEY]
During automatic tuning, the AT-140 grounds the key
voltage line, and the HF transceiver reduces output
power.
Approximately 7.5 V
Key
voltage 8
[V]
6
4
2
0
If the key voltage is more than 8 V, switch the [MODE]
switch (S1) to OFF mode (lower position).
NORMAL mode
OFF mode
4
Approximately 7.5 V
Less than 1 V to
start tuning
Time
During automatic tuning
Time
Grounded
S1
8