Icom IC-756 Instruction Manual page 15

!1 ANTENNA CONNECTOR 1 [ANT1]
!2 ANTENNA CONNECTOR 2 [ANT2] (pgs. 13, 14)
Accept a 50 antenna with a PL-259 connector.
NOTE: When using an optional AH-3
, connect it to the [ANT1] connector.
ANTENNA TUNER
The internal antenna tuner activates for [ANT2] and
deactivates for [ANT1] when connecting the AH-3.
D ACC SOCKETS
ACC(1) PIN NO. PIN NAME
1
2
3
2
4
5
4
1 3
8
6 7
5
Rear panel
view
6
7
8
ACC(2) PIN NO. PIN NAME
1
2
2
3
4 5
1 3
6
7
4
5
Rear panel
view
6
7
HF AUTOMATIC
DESCRIPTION
RTTY Controls RTTY keying.
GND Connects to ground.
Input/output pin.
Goes to ground when transmitting.
SEND
When grounded, transmits.
Modulator input.
MOD
Connects to a modulator.
AF detector output.
AF
Fixed, regardless of [AF] position.
Squelch output.
SQLS Goes to ground when squelch
opens.
13.8 V 13.8 V output when power is ON.
ALC ALC voltage input.
DESCRIPTION
8 V Regulated 8 V output.
GND
SEND
Band voltage output.
BAND
(Varies with amateur band)
ALC
NC
13.8 V
!3 GROUND TERMINAL [GND] (pgs. 13, 14)
Connect this terminal to a ground to prevent electri-
cal shocks, TVI, BCI and other problems.
SPECIFICATIONS
"HIGH" level
"LOW" level
Output current
Connected in parallel with ACC(2) pin 2.
Ground level
Output current
Input current (Tx) : Less than 200 mA
Connected in parallel with ACC(2) pin 3.
Input impedance
Input level
Output impedance : 4.7 k
Output level
Squelch open
Squelch closed
Output current
Connected in parallel with ACC(2) pin 7.
Control voltage
Input impedance
Connected in parallel with ACC(2) pin 5.
SPECIFICATIONS
Output voltage
Output current
Same as ACC(1) pin 2.
Same as ACC(1) pin 3.
Output voltage
Same as ACC(1) pin 8.
No connection.
Same as ACC(1) pin 7.
PANEL DESCRIPTION
: More than 2.4 V
: Less than 0.6 V
: Less than 2 mA
: –0.5 V to 0.8 V
: Less than 20 mA
: 10 k
: Approx. 100 mV rms
: 100 to 300 mV rms
: Less than 0.3 V/5 mA
: More than 6.0 V/100 µA
: Max. 1 A
: –4 to 0 V
: More than 10 k
: 8 V ±0.3 V
: Less than 10 mA
: 0 to 8.0 V
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