Icom IC-M503 Lock functions, Display backlighting, Monitor function, Activating the lock function

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12HM-134 REMOTE-CONTROL MICROPHONE

Lock functions

The lock function electronically locks keys and switches to prevent accidental changes and function access from the mi- crophone.

All keys, switches and controllers on the transceiver are functional.

Display backlighting

The function display and switches can be backlit for better visibility under low light conditions. And the backlighting con- dition can be adjusted independently from the transceiver.

ïActivating the lock function

While pushing and holding [H/L], push [SQL] to turn the lock function ON and OFF.

” appears.

Only [PWR], [PTT], [H/L], [SQL•MONI], [VOL]+[Y]/[Z] and [SQL]+[Y]/[Z] are functional.

Appears when the lock function is in use.

qPush and hold [VOL•DIM] for 1 sec. to enter backlight ad- justing mode.

” with number of backlight level appears in the channel name indicator.

wPush [Y]/[Z] to adjust the backlight level.

The backlight level is adjustable between 0 (lights OFF) and 3 (brightest).

Monitor function

ïActivating the all key lock function

While pushing and holding [H/L], turn the power ON by pushing [PWR] to turn the all key lock function ON and OFF.

” flashes.

Only [PWR] and [PTT] are func- tional.

Flashes when the all lock function is in use.

The monitor function releases the noise squelch mute of the microphone only. (An independent noise squelch system is employed.)

Push and hold [SQL•MONI] for 1 sec. to activate the mon- itor function.

” flashes and audio is emitted.

Any key, except [Y]/[Z], cancels the monitor function.

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Contents IM503 Channel 16 is automatically selected Mayday Mayday MaydayDS-100 #02 DSC Controller is required Table of Contents Page Privacy Operating RulesPriorities Radio LicensesPanel Description Volume Control VOLAdjusts the audio level. p Panel descriptionPanel Description Function display Microphone PTT Switch PTTChannel UP/DOWN Switches Y/Z Push and hold to transmit release to receive. pChannel Basic OperationChannel selection ÏCall channelRotate the channel selector to select a channel Basic OperationAtis and DSC channels FRG version only Receiving and transmitting Rotate the channel selector to select the desired channel Call channel programmingChannel names Push Call to input and set the nameActivating the scrambler Set mode Scrambler code itemOptional voice scrambler operation Programming scrambler codesOperation DUALWATCH/TRI-WATCHDescription DUALWATCH/TRI-WATCH SimulationPriority Scan Scan OperationsScan types Normal ScanScan Operation Setting tag channelsStarting a scan Clearing all tag channels in the selected channel groupSET Mode Construction SET ModeSet mode programming Scan resume timer Set mode itemsScan mode Dual/tri watchScrambler code Internal speakerLCD contrast Scrambler typeIntercom Operation Intercom operationCleaning Connections and MaintenanceFuse replacement UnpackingConnections and Maintenance ConnectionsMicrophone hanger Overhead Mounting Mounting on Dashboard Using the supplied mounting bracketMounting the transceiver Using the optional mounting bracket Optional unit installation Opening the transceiver case109.4 110.0 4 11⁄32˝ 165.0 6 1⁄2˝ 31.4 53.0 Dimensions145.0 5 23⁄32˝ Unit mm inchTroubleshooting Problem Possible Cause SolutionChannel List International channelsOptions Specifications and OptionsSpecifications Channel 16/CALL Channel Switch 16C Power Switch PWR pgsPTT Switch PTT pgs HM-134 REMOTE-CONTROL MicrophoneHM-134 REMOTE-CONTROL Microphone 12HM-134 REMOTE-CONTROL Microphone Channel Group Indicator pgsKEY Lock Indicator p 1EXTERNAL Speaker Jack7WAIT Indicator A. channels Call channelS.A. and International channels International channelsPush H/L to select the output power, if necessary Monitor function Lock functionsDisplay backlighting Activating the lock functionTo turn the scrambler func Tion OFF, repeat step w Programming scramble codesPush Y/Z to select the desired channel Push Dual to start dualwatch or tri-watch To cancel dualwatch/tri-watch, push Dial againDualwatch/Tri- watch operation Microphone’s own functions Entering set modeTransceiver’s functions Beep tone BeepIntercom beep function Available charactersInstallation HM-134 Connections and InstallationHM-134 supplied accessories Accessories included with the HM-134 Qty13HM-134 Connections and Installation 24 to 27 d mm 15⁄16 to 11⁄16˝ HM-134 Connections and InstallationMm 3⁄ 32˝ x 149 57⁄8˝ MB-75 TemplateCut here R11 Mm 3⁄32˝Installation Notes Installation notes0560 AUT NED POR DEN GBR BEL ITA FIN IRL LUX GRE SUI Intended Country of UseGER FRA ESP Kamiminami, Hirano-ku, Osaka 547-0003 JapanFrequency MHz Transmit Receive 01A