Panel Description ........... 2 - Icom IC-756PROII Instruction Manual

!2 ANTENNA CONNECTOR 1 [ANT1]
!3 ANTENNA CONNECTOR 2 [ANT2] (pgs. 14, 15)
Accept a 50 Ω antenna with a PL-259 connector.
When using an optional AH-4
MATIC ANTENNA TUNER
, connect it to the [ANT1] connector.
TENNA TUNER
The internal antenna tuner activates for [ANT2] and
deactivates for [ANT1] when connecting the AH-4 or
AH-3.
D ACC SOCKETS
ACC (1) PIN No. NAME
1 RTTY Controls RTTY keying
2 GND Connects to ground.
3 SEND Goes to ground when transmitting.
2
4
5
4 MOD
1 3
8
6
7
5
Rear panel view
6 SQLS
7 13.8 V 13.8 V output when power is ON.
8 ALC
ACC PIN No. NAME
1 8 V
2 GND
2
3 SEND
4
5
1 3
4 BAND
6
7
5 ALC
Rear panel view
6 TRV
7 13.8 V
HF/50 MHz AUTO-
or AH-3
HF AUTOMATIC AN-
DESCRIPTION
Input/output pin.
When grounded, transmits.
Modulator input.
Connects to a modulator.
AF detector output.
AF Fixed, regardless of [AF] position
in default settings. (see notes below)
Squelch output.
Goes to ground when squelch opens.
ALC voltage input.
DESCRIPTION
Regulated 8 V output.
Band voltage output.
(Varies with amateur band)
Activates [XVERT] input/output
when "HIGH" voltage is applied.
PANEL DESCRIPTION
!4 GROUND TERMINAL [GND] (pgs. 14, 15)
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)
Connected in parallel with ACC(2) pin 3.
Input impedance
Input level
Output impedance : 4.7 kΩ
Output level
SQL open
SQL 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.
Input impedance
Input voltage
Same as ACC(1) pin 7.
If the CW side tone level limit or beep level limit is in
use, the CW side tone or beep tone decreases from
the fixed level when the [AF] control is rotated above
a specified level, respectively. (p. 65)
: 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
: Less than 200 mA
: 10 kΩ
: Approx. 100 mV rms
: 100–300 mV rms
: Less than 0.3 V/5 mA
: More than 6.0 V/100 µA
: Max. 1 A
: –4 V to 0 V
: More than 10 kΩ
: 8 V ±0.3 V
: Less than 10 mA
: 0 to 8.0 V
: More than 10 kΩ
: 2 to 13.8 V
2
13