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CONTROL CABLE SIGNALS
2001 NEW
Terminal information
Consider the following points when using a non-Icom
transceiver.
Start voltage [STAR]
When a start voltage (less than 1 V) is received, the
AT-140 begins automatic tuning.
Key voltage [KEY]
During automatic tuning, the AT-140 grounds the key
voltage line, and the HF transceiver reduces output
power.
If the key voltage is more than 8 V, switch the mode
switch (S1) to OFF mode (lower position).
8
6
4
2
0
Time
Key
voltage
[V]
Grounded
Approx. 7.5 V
During automatic tuning
8
6
4
2
0
Time
More than
350 msec.*
Approx. 7.5 V
Less than 1 V to
start tuning
Start
voltage
[V]
*For tuner through operation; Less than 250 msec.
[KEY]
[STAR]
[13.6]
[E]
*Connector shape may differ
according to version.
Terminal Description
[KEY] Key voltage. Grounded during tuning.
Max. current drain 100 mA.
[13.6] 13.6 V DC + input terminal.
Max. current drain 2 A
[STAR] Receives start voltage.
Max. current drain 1 mA
[E] Ground terminal for above signals.
Mode switch (S1)
[E]
[13.6]
[STAR]
[KEY]
NORMAL mode
OFF mode
S1
AT-140_1.qxd 04.4.26 9:16 Page 6
9


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