Icom IC-7850 Instruction Manual - Page 266
Acc Socket, Connector Information
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Previous view 20 CONNECTOR INFORMATION ■■ACC socket Connects to external equipment or a personal computer to control the external unit or to control the transceiver. Sockets [A ACC1] and [A ACC2] output AF signals of the MAIN band, sockets [B ACC1] and [B ACC2] output AF signals of the SUB band. B (Rear panel view) ACC 1 PIN No. NAME DESCRIPTION SPECIFICATIONS 1 RTTY Controls RTTY keying "High level": "Low level": Output current: More than 2.4 V Less than 0.6 V Less than 2 mA 2 GND Connects to ground. Connected in parallel with ACC 2 pin 2. 2 45 183 67 3 SEND* Input/output pin. Connected in An external equipment controls the transceiver. When this pin goes low, the transceiver transmits. Input voltage (TX): Input voltage (RX): Current flow: -0.5 V to 0.8 V 2.0 V to 20.0 V Maximum 20 mA parallel with ACC 2 pin 3. The pin outputs a low level signal when the transceiver transmits. Output voltage (TX): Current flow: Less than 0.1 V Maximum 200 mA 4 MOD Modulator input. Connects to the circuit. internal modulator Input impedance: Output level: 10 kΩ Approximately 100 mV rms (Rear panel view) 5 AF/ IF Fixed AF detector or receive IF (12 kHz) Output impedance: 4.7 kΩ (IF=12 kHz) signal output. Output level: 100-300 mV rms 6 SQLS Squelch output. Grounded when the squelch opens. SQL open: SQL closed: Less than 0.3 V/5 mA More than 6.0 V/100 µA 7 15V 15V output when power is ON. Connected in parallel with ACC 2 pin 7. Output current: Max. 1 A 8 ALC ALC voltage input. Input impedance: Connected in parallel with ACC 2 pin 5. Input level: More than 10 kΩ -4 V to 0 V ACC 2 PIN No. NAME 1 8 V 2 2 45 3 1 3 4 67 5 (Rear panel view) 6 GND SEND* BAND ALC TRV 7 15V DESCRIPTION SPECIFICATIONS Regulated 8 V output. Output voltage: Output current: 8 V ±0.3 V Less than 10 mA Same as ACC 1 pin 2. Same as ACC 1 pin 3. Band voltage output. (Varies with the selected amateur band) Output voltage: 0 V to 8.0 V Same as ACC 1 pin 8. Activates [X-VERTER] input/output when "HIGH" voltage is applied Input impedance: More than 10 kΩ Input voltage: 2 V to 13.8 V Same as ACC 1 pin 7. 20-2