Icom IC-7300 Instruction Manual basic - Page 66

12 CONNECTOR INFORMATION ACC socket Connects to external equipment or a PC to control the external unit or to control the transceiver. ••ACC socket ACC 13-pin 13 9 10 11 12 5678 1234 Rear panel view q brown w red e orange r yellow t green y blue u purple i gray o white !0 black !1 pink !2 light blue !3 light green Color refers to the cable strands of the supplied cable. PIN No. NAME DESCRIPTION SPECIFICATIONS 1 8V Regulated 8 V output. (U sed as the reference voltage for the band voltage.) Output voltage: Output current: 8 V ±0.3 V Less than 10 mA 2 GND Connects to ground. - 3 SEND*1 Input/output pin. An external unit controls the transceiver. Input voltage (RX): 2.0 to 20.0 V When this pin goes to Input voltage (TX): -0.5 to +0.8 V ground, the transceiver Current flow: Maximum 20 mA transmits. The pin goes low when the transceiver transmits. Output voltage (TX): Less than 0.1 V Current flow: Maximum 200 mA 4 BDT Not used. - 5 BAND Band voltage output. (V aries with the selected amateur band) Output voltage: 0 to 8.0 V 6 ALC ALC voltage input. Input level: -4 to 0 V Input impedance: More than 3.3 kΩ 7 NC - - 8 13.8 V 13.8 V output when power is ON. Output current: Maximum 1 A 9 TKEY Not used. - 10 FSKK Controls RTTY keying. High level: Low level: Output current: More than 2.4 V Less than 0.6 V Less than 2 mA 11 MOD Modulator input. Input impedance: 10 kΩ Input level: 100 mV rms*3 12 AF/IF Fixed AF detector or receive IF (IF=12 kHz)*2 (12 kHz) signal output. Output impedance: 4.7 kΩ Output level: 100 ~ 300 mV rms*4 13 SQL S 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 *1 W hen the SEND terminal controls an inductive load, such as a relay, a counter-electromotive force can malfunction or damage the transceiver. To prevent this, we recommend adding a switching diode, such as an 1SS133, on the load side of the circuit to absorb the counter-electromotive force. When the diode is added, a delay in relay switching may occur. Be sure to check its switching action before operating. (Example) ACC socket e SEND i 13.8 V Relay Switching diode To a non-Icom linear amplifier *2 Y ou can change the pin 12 setting in the "ACC/USB Output Select" item on the CONNECTORS set screen. If the pin is set to IF, the transceiver outputs a 12 kHz IF signal from [ACC]. In that case, you can listen to the DRM broadcast with the application software receiver that is installed into your PC. *3 Y ou can change the input level in the "ACC MOD Level" item on the CONNECTORS set screen. (p. 8-5) 100 mV rms is at the 50% (default) setting. *4 Y ou can change the output level in the "ACC/USB AF Output Level" item on the CONNECTORS set screen. (p. 8-5) Approximately 200 mV rms is at the 50% (default) setting. 12-1