Icom 4088A Instruction Manual - Page 9

2 PANEL DESCRIPTION q EXTERNAL SPEAKER AND MICROPHONE JACKS Connect an optional speaker-microphone or headset, if desired. w VOLUME CONTROL [VOL] 2 Rotate clockwise to increase and counterclockwise to decrease volume. e PTT SWITCH [PTT] Push and hold to transmit; release to receive. r MODE SWITCH [MODE] ➥ Push to enter and select set mode for group (p. 12) and voice scrambler code. (p. 16) ➥ Push and hold for 1 sec. to turn the monitor function ON and OFF. (p. 8) t CHANNEL UP SWITCH [Y] ➥ Push to increment the operating channel. ➥ Push and hold to increment the operating channel continuously. ➥ While scanning, changes scanning direction. (p. 14) y CHANNEL DOWN SWITCH [Z] ➥ Push to decrement the operating channel. ➥ Push and hold to decrement the operating channel continuously. ➥ While scanning, changes scanning direction. (p. 14) u POWER SWITCH [PWR] ➥ Push to turn the power ON. ➥ Push and hold this key to toggle the key lock function ON/OFF. (p. 19) i EXTERNAL DC IN JACK [DC 6V] (p. 6) Connects the optional AC adapter or cigarette lighter cable for both operation and battery charging. 3