Icom IC-7700 ■Accessory connector information

INSTALLATION AND CONNECTIONS 2

■Accessory connector information

ACC 1			PIN No.	NAME	DESCRIPTION	SPECIFICATIONS
						“High” level	: More than 2.4 V
			1	RTTY	Controls RTTY keying	“Low” level	: Less than 0.6 V
						Output current	: Less than 2 mA
			2	GND	Connects to ground.	Connected in parallel with ACC 2 pin 2.
					Input/output pin.	Ground level	: –0.5 V to 0.8 V
						Output current	: Less than 20 mA
			3	SEND	Goes to ground when transmitting.
					When grounded, transmits.	Input current (Tx)	: Less than 200 mA
						Connected in parallel with ACC 2 pin 3.
2
	5
4			4	MOD	Modulator input.	Input impedance	: 10 kΩ
1 8		3
					Connects to a modulator.	Input level	: Approx. 100 mV rms
6	7
					AF detector output.	Output impedance	: 4.7 kΩ
			5	AF	Fixed, regardless of [AF] position
						Output level	: 100–300 mV rms
					in default settings. (see notes below)
			6	SQLS	Squelch output.	SQL open	: Less than 0.3 V/5 mA
					Goes to ground when squelch opens.	SQL closed	: More than 6.0 V/100 µA
			7	13.8 V	13.8 V output when power is ON.	Output current	: Max. 1 A
						Connected in parallel with ACC 2 pin 7.
						Control voltage	: –4 V to 0 V
			8	ALC	ALC voltage input.	Input impedance	: More than 10 kΩ
						Connected in parallel with ACC 2 pin 5.
ACC 2			PIN No.	NAME	DESCRIPTION	SPECIFICATIONS
			1	8 V	Regulated 8 V output.	Output voltage	: 8 V ±0.3 V
						Output current	: Less than 10 mA
			2	GND	Same as ACC 1 pin 2.
2
	5		3	SEND	Same as ACC 1 pin 3.
4
1		3	4	BAND	Band voltage output.	Output voltage	: 0 to 8.0 V
6	7
					(Varies with amateur band)
			5	ALC	Same as ACC 1 pin 8.
			6	TRV	Activates [X-VERTER] input/output	Input impedance	: More than 10 kΩ
					when “HIGH” voltage is applied.	Input voltage	: 2 to 13.8 V
			7	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. (p. 12-6)

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