Accessory Connectors - Icom IC-735 Instruction Manual

ACC (2)
5 - 6 ACCESSORY CONNECTORS
The DIN type ACCESSORY CONNECTORS and one mini-jack are
installed on the rear panel of the IC-735. The function of each
connector is as follows:
ACC (1): Connect a phone patch or AFSK RTTY equipment here.
ACC (2): Connect an AT-150, IC-AT100 or IC-AT500 automatic
antenna tuner here.
REMOTE JACK: Connect a personal computer through the CT-17
CI-V LEVEL CONVERTER for remote control
of the transceiver functions.
ACC (1)
(t) NC
No connection.
GND
Ground. Connected in parallel with ACC (2) pin 2.
SEND
IC-735 switches to the transmit mode when this pin is
grounded.
® MOD
Input to the modulator stage for AFSK signals.
(8) AF
Output from the receiver detector stage. This is a fixed
level regardless of the AF gain setting or AF output.
© SQLS This terminal goes to ground level when the SQUELCH
opens. The letters RECV appear on the front panel
display at the same time.
C7 13.8V
13.8V DC output switched by the main POWER
SWITCH on the front panel. Connected in parallel
with ACC (2) pin 7.
(8) ALC
Input for external ALC voltage. Connected in parallel
with ACC (2) pin 5.
ACC (2)
0
8V
Output reference voltage for band switching.
0
GND
Ground.
0
SEND
Same as ACC (1).
® BAND
Output for external band switching. See the NOTE
below.
® ALC
Input for external ALC voltage. Same as ACC (1) pin
8.
0
TR V
Input for TRANSVERTER control. The IC-735 will
operate with a transverter when 8V DC is applied to
this pin.
0
13.8V
Same as ACC (1) pin 7.
NOTE:
The IC-735 outputs a band control voltage when the
band of operation is changed. This signal automatically
switches accessory equipment such as the ICOM linear
amplifier or antenna tuners.
BAND CONTROL VOLTAGE CHART
BAND (MHz)
BAND CONTROL VOLTAGE
1.8
7.0 — 8.0V
3.5
6.0 — 6.5V
7
5.0 — 5.5V
14
4.0 — 4.5V
18 - 21
3.0 — 3.5V
24 - 28
2.0 — 2.5V
10
0
— 1.2V