Direction Finding, Direction ﬁnding function example | Icom IC-R3

The direction ﬁnding function allows you to check a variation of the signal level continuously.

Using a commercially available directional antenna, you can determine the direction of the signal source. Using 2 receivers with the directional antennas, you can pinpoint the signal source.

qPush [FUNC] + [↕] for 2 sec. to turn the color LCD ON. w Push [FUNC] + [↕] one or more times to select the direction

ﬁnding screen.

e Set the desired frequency.

•The color LCD shows the variation of the signal level.

•If the strong signal is received on 1149.995 MHz or below, use the attenuator function. (p. 9)

FM

146.100.000

TS 15.0

Signal levels

rTurn around the directional antenna for maximum receive level.

tThe direction (or opposite) of the maximum receive level may indicate the signal source direction.

DIRECTION FINDING 12

•Direction ﬁnding function example

Signal source

FM

146.100.000

TS 15.0

Signal levels

IC-R3

Time

The direction ﬁnding function is a supplemental aid for ﬁnd-

ing a signal source only. It is not designed for use as a compass.

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Icom IC-R3 instruction manual Direction Finding, Direction ﬁnding function example, Signal source, Signal levels

Contents

IR3 Areas with temperatures below -10C +14F or above You experience a ringing in your ears, reduce the volumeEven when the receiver power is OFF, a slight current still +60C +140F Accessories included with the receiver Qty Supplied Accessories Table of Contents Battery installation Accessory AttachmentAntenna Belt clip Panel description Panel Description Mode Switch Mode SET VFO/MEMORY Switch V/M SkipMonitor Switch SQL ATT External DC Power Jack DC Function display Battery Indicators Skip Scan Indicator pgs2ATTENUATOR Indicator p Audio and video output jack information Dual LCD What is VFO? Frequency and Channel SettingVFO and memory channels Operating band selection Setting a tuning step Setting a frequency Selecting a memory channel Push SQL ATT to exit the attenuator setting conditionAttenuator function Lock function Basic Operation When a signal is receivedReceiving U.S.A. version automatically turns itself OFF when Setting squelch level Setting volume levelWhile pushing SQL, rotate Dial to select the squelch level Monitor function Receive mode selection Push Func + Mode SET momentarily to enter set mode Setting the backlighting conditionDisplay backlighting Rotate Dial until Light appears Memory Channels Memory channel contentsGeneral Programming during selection Programming after selection Transferring memory contents to another memory Example Clearing memory channel 3 memory bank a Memory bank selection Memory clearPush Func + V/M for 2 sec. to clear Memory names Rotate the tuning dial to select the desired character Scan types Scan OperationFull Scan p Function p Release ↔ to start the scan Full/band/programmed scan To stop the scan, push ↔ again Memory bank scan Band ranges Selecting scan edges Setting the scan pause time Skip channel settingScan resume condition Rotate Dial until Pause Scan or Pause appears Rotate Dial until Scan Resume or RESUmE appears Setting the scan resume time Frequency skip function ON/OFF Frequency skip functionProgramming a skip frequency Priority watch types Priority WatchMemory Scan Watch p VFO Scan Watch p Priority watch operation Push Mode SET to exit set mode and start the watchMemory channel watch and memory scan Watch Rotate Dial to select Priority or PRIo VFO scan watch Subaudible Tone Operation Setting subaudible tones for tone squelch OperationTone squelch operation Operation Available subaudible tone frequencies Unit Hz Pocket beep operationRotate Dial until Tone Freq. or tonE appears Push ↔ to stop the scan Tone scanPush SQL to stop the beeps and ﬂashing Rotate Dial until Duplex or dUP appears Duplex OperationDuplex shift direction Rotate Dial until Offset Freq. or oFFSEt appears Offset frequency Range, if desired Band Scope TV Operation Skip channel settingTV operation TV channel receiving TV frequency AM TV memory channel TV frequency AM TV receivingPush ↔ one or more times to select the band above 30 MHz Push Func + one or more times to select the TV screen ATV memory channel Sub carrier adjustmentATV operation Signal levels Signal sourceDirection Finding Direction ﬁnding function example Other Functions Set modeSet mode items Release Func to exit the condition Setting dial select stepDial select step Rotate Dial until A.Power OFF or AP oFF appears Auto power-off functionBeep tones Rotate Dial until Beep Audio or bEEP appears Monitor switch action Power saverRotate Dial until Power Save or P Save appears Rotate Dial until Monitor or monI appears Lock function effect Dial speed accelerationRotate Dial until Dial Speedup or SPEEd appears Rotate Dial until Key Lock or LoCk appears Color LCD can be automatically turned on when using Display mode selectionDisplay contrast Rotate Dial until Display or dISP appears Rotate Dial until Bright appears Display brightnessDisplay background color Total reset Partial resetPush Power for 2 sec. to turn power OFF Cloning function Battery cautions Battery ChargingBattery charging Battery pack installation Turn power OFF Check CP-18A/E fuse ReplacementCP-18A/ERegular charging Rapid charging with the BC-135 Memory mode VFO mode Operation Flow Chart Scan resume time p Confirmation beep p Backlighting p Power save pAuto power OFF p Ccir channels TV Frequency TableA. channels New Zealand channels Australian channelsTaiwan channels Indonesian channels China channels Italian channels FOT channels Receiver Specifications and OptionsGeneral Options Operating periods Approx Problem Possible Cause Solution Troubleshooting Quick Reference Quick Reference Declaration of Conformity Kamihigashi, Hirano-ku, Osaka 547-0002 Japan