Accessory Connector Information - Icom IC-7800 Instruction Manual

2
INSTALLATION AND CONNECTIONS

■ Accessory connector information

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
3
1
8
6
7
5 AF
6 SQLS
7 13.8 V 13.8 V output when power is ON.
8 ALC
ACC 2 PIN No. NAME
1 8 V
2 GND
2
3 SEND
4
5
1 3
4 BAND
6 7
5 ALC
6 TRV
7 13.8 V
DESCRIPTION
Input/output pin.
When grounded, transmits.
Modulator input.
Connects to a modulator.
AF detector output.
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 [X-VERTER] input/output Input impedance
when "HIGH" voltage is applied.
2-10
SPECIFICATIONS
"High" level : More than 2.4 V
"Low" level : Less than 0.6 V
Output current : Less than 2 mA
Connected in parallel with ACC 2 pin 2.
Ground level : –0.5 V to 0.8 V
Output current : Less than 20 mA
Input current (Tx) : Less than 200 mA
Connected in parallel with ACC 2 pin 3.
Input impedance : 10 kΩ
Input level : Approx. 100 mV rms
Output impedance : 4.7 kΩ
Output level : 100–300 mV rms
SQL open : Less than 0.3 V/5 mA
SQL closed : More than 6.0 V/100 µA
Output current : Max. 1 A
Connected in parallel with ACC 2 pin 7.
Control voltage : –4 V to 0 V
Input impedance : More than 10 kΩ
Connected in parallel with ACC 2 pin 5.
SPECIFICATIONS
Output voltage : 8 V ±0.3 V
Output current : Less than 10 mA
Same as ACC 1 pin 2.
Same as ACC 1 pin 3.
Output voltage : 0 to 8.0 V
Same as ACC 1 pin 8.
: More than 10 kΩ
Input voltage : 2 to 13.8 V
Same as ACC 1 pin 7.
NOTE: If the CW side tone level limit or beep level
limit is in use, the CW side tone or beep tone de-
creases from the fixed level when the [AF] control is
rotated above a specified level, respectively. (p. 12-
5)