Icom IC-R20 Instruction Manual

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Contents

Icom IC-R20 Instruction Manual Manual pdf 27 page image

204BASIC OPERATION4Duplex communication uses 2 different frequencies for trans-mitting and receiving. Generally, duplex is used in communi-cation through a repeater, some utility communications, etc.During duplex operation, the transmit station frequency isshifted from the receive station frequency by the offset fre-quency. Repeater information (offset frequency and shift di-rection) can be programmed into memory channels. (p. 26)DD Settingq Set the receive station frequency (repeater output frequency).w Push [8 SET] for 1 sec. to enter set mode.eRotate [R-DIAL] to select “SET EXPAND” item, then push[8 SET].r Rotate [R-DIAL] to select “ON.”tRotate [R-DIAL] to select “OFFSET FREQ,” then push[8 SET].yRotate [R-DIAL] to set the desired offset frequency within0.00000–159.99999 MHz range, then push [8 SET].• The tuning step, selected in VFO mode, is used for setting.• Push [VFO MHz] for 1 sec. then rotate [R-DIAL] to change thefrequency in 1 MHz steps, or push for 1 sec. again then rotate[R-DIAL] to change the frequency in 10 MHz steps. (Each pushfor 1 sec. toggles 1 MHz or 10 MHz tuning steps.)u Rotate [R-DIAL] to select “DUPLEX.”iRotate [R-DIAL] to select “–DUP” or “+DUP.”o Push [DUALWATCH] to exit set mode.!0Push and hold [SQL] to monitor the transmit station fre-quency (repeater input frequency) directly.DUPLEX--DUP>OFF-+DUP----------------OFFSET-FREQ----0.000.00----------------[R-DIAL]DUALWATCHSET8SET TS:5.0kHz√MODE ANLAFCTSQLFM146 010PSKIP-DUP***-SET-MODE-***>SET-EXPAND-FM-ANTENNA-AM-ANTENNA-AF-FILTER-ANL-NOISE-BLANKER---------------- Duplex operation USING EXPANDED SET MODE