103 BASIC OPERATION Optional Voice scrambler operationDD Activating the ScramblerThe optional Voice scrambler provides private communica-tions. In order to receive or send scrambled transmissionsyou must first activate the Scrambler function. To activate thefunction, an optional UT-98 or UT-112 is necessary. See p. 41for setting the scrambler unit. Ask your dealer for details.The Scrambler function automatically turns OFF whenChannel 16 or 70 is selected.q Select an operating channel other than Channel 16 or 70.w While pushing [[ HI/LOHI/LO ]], push [[ LO/DXLO/DX ]] (( SCR)SCR) to turnthe optional Scrambler function ON.• “SC” appears.e To turn the Scrambler function OFF, repeat step w.• “SC” disappears.DD Programming scrambler codesThere are 128 or 32 codes (0 to 127 or 1 to 32) available forprogramming when the optional UT-98 or UT-112 is installed.In order to understand one another, all transceivers in yourgroup must have the same scramble code. This function maynot be available depending on dealer setting.q Turn power OFF.w While pushing [[ 99]], turn power ON to enter Set mode.e After the display appears, release [[ 99]].r Push [[ 99 ]] one or more times to select the scramblercode.• “Scrambler Code” appears.t Rotate [[CHANNELCHANNEL]] to select the desired scrambler code.y Turn power OFF, then ON again to exit Set mode.161616161616ICSet ModeBeepSet ModeScramblerCodeSet ModeScramblerCodeEnter Set mode Turn OFFPOWER POWER+916 916Select codePush one ormore times.Set mode Scrambler code item[Example]: Programming scrambler code 8.

OPERATING RULES

I Front panel

panel description 2

I Function display

PANEL DESCRIPTION........... 2

I Channel selection

basic operation

I Receiving and transmitting

I Call channel programming

BASIC OPERATION ............ 6

DUALWATCH/TRI-WATCH

I Scan types

I Setting tag channels

I MMSI code programming

dsc operation

I Position and Time programming

I Position/Time indication

I Distress call

I Transmitting DSC calls

I Receiving DSC calls

I Received messages

dsc set mode

I Intercom operation

I Microphone lock function

I Set mode programming

I Set mode items

set mode

I Supplied accessories

I Connections

I Mounting the transceiver

I Optional unit installation

I Dimensions

troubleshooting

CHANNEL LIST

SPECIFICATIONS AND 5

I Options

I Panel description

I Lock functions

I RF attenuator function

I Dualwatch/Tri-watch operation

I Starting a scan

I Channel comments

I HM-127 supplied accessories

I Installation

Icom IC-M502A Instruction Manual

IC-M502A