INSTRUCTION MANUAL VHF MARINE TRANSCEIVER iM502 This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
IMPORTANT READ ALL INSTRUCTIONS carefully and completely SAVE THIS INSTRUCTION MANUAL — This in- before using the transceiver. struction manual contains important operating instructions for the IC-M502. IN CASE OF EMERGENCY If your vessel requires assistance, contact other vessels and the Coast Guard by sending a distress call on channel 16. USING CHANNEL 16 USING DIGITAL SELECTIVE CALLING (Ch 70) DISTRESS CALL PROCEDURE DISTRESS CALL PROCEDURE 1.
TABLE OF CONTENTS ■ Position and time programming .... 14 ■ Position indication ......................... 15 ■ Distress call .................................. 16 ■ Transmitting DSC calls ................. 17 ■ Setting the distress information .... 21 ■ DSC individual ID ......................... 22 ■ Receiving DSC calls ..................... 23 ■ DSC set mode .............................. 26 ■ Receive messages ....................... 28 IMPORTANT ..............................................
CAUTIONS RWARNING! NEVER connect the transceiver to an AC outlet. This may pose a fire hazard or result in an electric shock. AVOID the use of chemical agents such as benzine or alcohol when cleaning, as they may damage the transceiver surfaces. CAUTION: Changes or modifications to this device, not ex- BE CAREFUL! The transceiver rear panel will become pressly approved by Icom Inc., could void your authority to operate this device under FCC regulations. hot when operating continuously for long periods.
OPERATING RULES PRIORITIES • Read all rules and regulations pertaining to priorities and keep an up-to-date copy handy. Safety and distress calls take priority over all others. • You must monitor channel 16 when you are not operating on another channel. • False or fraudulent distress signals are prohibited and punishable by law. PRIVACY • Information overheard but not intended for you cannot lawfully be used in any way. • Indecent or profane language is prohibited.
2 PANEL DESCRIPTION ■ Panel description !1 !0 VHF MARINE o iM502 Function display DISTRESS WATERPROOF Speaker q POWER DSC/ENT SCAN CH/WX POS TAG DW U/I/C w q POWER SWITCH [POWER] Push to toggle the transceiver power ON and OFF. e SQUELCH CONTROL [SQL] Sets the squelch threshold level. (p. 8) 2 16 9 LO/DX HI/LO VOL w VOLUME CONTROL [VOL] Adjusts the audio level. (p. 8) i IC SCR SQL e r t y u r TRANSMIT POWER SWITCH [HI/LO] ➥ Toggles high and low power when pushed. (p.
PANEL DESCRIPTION ➥ While pushing [HI/LO], rotate [CHANNEL] to adjust the brightness of the LCD and switch backlight. y ATTENUATOR/INTERCOM/SCRAMBLER SWITCH [LO/DX•IC•SCR] ➥ Toggles the attenuator function ON and OFF when pushed momentarily. (p. 8) • “LOCAL” appears when the attenuator is in use. The order of indication precedence is “LOCAL,” “SP OFF” and “CALL.” ➥ Activates an optional intercom function when pushed for 1 sec. (p.
2 PANEL DESCRIPTION ■ Function display o q w e r ➥ “Low battery” flashes when the battery voltage drops to approx. 10 V DC or below. ➥ “DUAL” appears during dualwatch; “TRI” appears during tri-watch. (p. 11) i BUSY INT 25W CALL TAG SC DUP CALLING u t y q BUSY/TRANSMIT INDICATOR (p. 8) ➥ “BUSY” appears when receiving a signal or when the squelch opens. ➥ “TX” appears while transmitting. w POWER INDICATOR (p. 8) ➥ “25W” appears when high power is selected. ➥ “1W” appears when low power is selected.
PANEL DESCRIPTION 2 ■ Microphone q Speaker Microphone w e q PTT SWITCH [PTT] Push and hold to transmit; release to receive. (p. 8) Y]/[Z Z] w CHANNEL UP/DOWN SWITCHES [Y Push either switch to change the operating memory channel, set mode contents, etc. (p. 8) e TRANSMIT POWER SWITCH [HI/LO] ➥ Same as the [HI/LO] switch on the front panel. (p. 8) ➥ While pushing [HI/LO] on the supplied microphone, turn power ON to toggle the lock function ON and OFF. (p.
3 BASIC OPERATION ■ Channel selection Channel 16 Channel 16 is the distress and safety channel. It is used for establishing initial contact with another station and for emergency communications. Channel 16 is monitored during both dualwatch and tri-watch. While standing by, you must monitor channel 16. ➥ Push [16•9] momentarily to select channel 16. ➥ Push [CH/WX] to return to the condition before selecting channel 16, or rotate [CHANNEL] to select operating channel. ➥ Push [16•9] for 1 sec.
BASIC OPERATION 3 q Push [CH/WX] once or twice to select a weather channel. • “WEATHER” appears when a weather channel is selected. “WX ALT” appears when the weather alert function is in use. (p. 31) USA w Rotate the channel selector to select a channel. • Channels are memorized separately for each channel group. U.S.A. channels Push CANADA HI/LO + CH/WX DW U/I/C INT DUP Canadian channels WEATHER Push once or twice CH/WX DW U/I/C When weather alert is OFF.
3 BASIC OPERATION ■ Receiving and transmitting CAUTION: Transmitting without an antenna may damage the transceiver. q Push [POWER] to turn power ON. w Set the audio and squelch levels. ➥ Rotate [SQL] fully counterclockwise in advance. ➥ Rotate [VOL] to adjust the audio output level. ➥ Rotate [SQL] clockwise until the noise disappears. e To change the channel group, push [CH/WX•DW•U/I/C] while pushing [HI/LO]. (p.
BASIC OPERATION 3 ■ Call channel programming ■ Channel names The call channel is used to select channel 9, however, you can program your most often-used channels in each channel group for quick recall. Memory channels can be tagged with alphanumeric names of up to 10 characters each. q While pushing [HI/LO], push [CH/WX•DW•U/I/C] one or more times to select the desired channel group (U.S.A., International, Canada) to be programmed. w Push [16•9] for 1 sec.
3 BASIC OPERATION ■ Optional voice scrambler operation Activating the scrambler Programming scrambler codes The optional voice scrambler provides private communications. In order to receive or send scrambled transmissions you must first activate the scrambler function. To activate the function, an optional UT-98 or UT-112 is necessary. See p. 33 for selecting the unit. Ask your dealer for details.
DUAL WATCH/TRI-WATCH 4 ■ Description ■ Operation Dualwatch monitors channel 16 while you are receiving another channel; tri-watch monitors channel 16 and the call channel while receiving another channel. q Select the desired operating channel. w Select dualwatch or tri-watch in set mode. (p. 31) e Push [CH/WX•DW•U/I/C] for 1 sec. to start dualwatch or tri-watch. • “DUAL” appears during dualwatch; “TRI” appears during tri-watch. • Beep tone sounds when a signal is received on channel 16.
5 SCAN OPERATIONS ■ Scan types Scanning is an efficient way to locate signals quickly over a wide frequency range. The transceiver has priority scan and normal scan. When the weather alert function is in use, the selected weather channel is checked while scanning. (p. 31) PRIORITY SCAN CH 02 CH 16 CH 05 CH 01 CH 03 CH 04 Priority scan searches through all tag channels in sequence while monitoring channel 16.
SCAN OPERATION 5 ■ Setting tag channels ■ Starting a scan For more efficient scanning, add desired channels as tag channels or clear tag channels for unwanted channels. Channels set as non-tag channels will be skipped during scanning. Tag channels can be assigned to each channel group (U.S.A., International, Canada) independently. Set scan type (priority or normal scan) and scan resume timer in advance using set mode. (p.
6 DSC OPERATION ■ MMSI code programming ■ Position and time programming The 9-digit MMSI (DSC self ID) code can be programmed at power ON. A distress call should include the ship’s position and time. If no GPS is connected, your position and UTC (Universal Time Coordinated) time should be input. They are included automatically when a GPS receiver (NMEA0183 ver. 2.0) is connected. This function is not available when the MMSI code has been programmed by the dealer.
DSC OPERATION r Push [DSC/ENT] to set the position and advance to time setting condition. • Push [LO/DX] to abandon the setting and exit the condition. Input time UTC: : 6 ■ Position indication When an optional GPS receiver (NMEA0183 ver. 2.0) is connected, the transceiver can display the current position and time. When no GPS receiver is connected, the transceiver displays the manually entered position and time. Null˘[H/L] t Rotate the channel selector to select the digit of current UTC time.
6 DSC OPERATION ■ Distress call A distress call should be transmitted if, in the opinion of the Master, the ship or a person is in distress and requires immediate assistance. NEVER USE THE DISTRESS CALL WHEN YOUR SHIP IS NOT IN AN EMERGENCY. A DISTRESS CALL CAN BE USED ONLY WHEN IMMEDIATE HELP IS NEEDED. q Confirm any distress call is not being received. w While lifting up the switch cover, push the [DISTRESS] switch for 5 sec. to transmit the distress call.
DSC OPERATION ■ Transmitting DSC calls Transmitting individual call The individual call function allows you to transmit a DSC signal to a specific party only. q Select a desired channel other than channel 70. w Push [DSC/ENT] to select the DSC menu. Sel item ˘Individual INDV ACK All ships e Rotate the channel selector to select “individual” and push [DSC/ENT].
6 DSC OPERATION Transmitting individual acknowledgement Transmit an acknowledgement (‘able to comply’ or ‘unable to comply’) when an individual call for you is received. q Select a desired channel other than channel 70. w Push [DSC/ENT] to select the DSC menu. e Rotate the channel selector to select “INDV ACK” and push [DSC/ENT]. • “INDV ACK” appears after an individual call is received.
DSC OPERATION Transmitting all ships call Large ships use channel 70 as their “listening channel.” When you want to announce a message to these ships, use the “all ships call” function. q Select a desired channel other than channel 70. w Push [DSC/ENT] to select the DSC menu. e Rotate the channel selector to select “All ships” and push [DSC/ENT]. 6 t The all ships call has been transmitted. All ships Completed y Push [PTT] or rotate the channel selector to exit the condition.
6 DSC OPERATION Transmitting position request call Transmit a position request call when you want to know your friend’s current position, etc. POS REQ Completed Wait for ACK q Select a desired channel other than channel 70. w Push [DSC/ENT] to select the DSC menu. e Rotate the channel selector to select “POS request” and push [DSC/ENT]. Sel item INDV ACK All ships ˘POS request r Push [DSC/ENT] to transmit the position request call. • Channel 70 is selected and the position request call is transmitted.
DSC OPERATION ■ Setting the distress information The nature of the distress call should be included in the distress call. q Push [DSC/ENT] to select the DSC menu. w Rotate the channel selector to select “DTRS set” and push [DSC/ENT]. Sel item RCV calls ˘DTRS set Set-up e Rotate the channel selector to select the nature of the distress, then push [DSC/ENT].
6 DSC OPERATION ■ DSC individual ID A total of 40 DSC address ID’s can be programmed and named with up to 10 characters. Programming address ID q Push [DSC/ENT] to select the DSC menu. w Rotate the channel selector to select “Set-up” and push [DSC/ENT]. Sel item RCV calls DTRS set ˘Set-up e Rotate the channel selector to select ‘Add ID,’ then push [DSC/ENT]. Set-up ˘Add ID Delete ID Offset time r Set the distress ID and ID name, then push [DSC/ENT]. • Rotate the channel selector to select the character.
DSC OPERATION r Select the desired ID name with the channel selector, then push [DSC/ENT]. Delete ID ˘Icom2 John Smith t Push [DSC/ENT] to delete the address ID; push other switch to exit the condition. 6 ■ Receiving DSC calls Receiving a distress call While monitoring channel 70 and a distress call is received: ➥ Emergency alarm sounds for 2 minutes. • Push any switch to stop the alarm. ➥ “Received Distress” appears in the display; then, channel 16 is automatically selected.
6 DSC OPERATION Receiving a distress relay acknowledgement While monitoring channel 70 and a distress relay acknowledgement is received: ➥ Emergency alarm sounds for 2 minutes. • Push any switch to stop the alarm. ➥ “Received DTRS RLY ACK” appears in the display; then, channel 16 is automatically selected. Received DTRS RLY ACK < Tokyo CG > Icom2 Receiving a distress relay call While monitoring channel 70 and a distress relay call is received: ➥ Emergency alarm sounds for 2 minutes.
DSC OPERATION Received Individual Routine < Icom3 Receiving a geographical area call While monitoring channel 70 and a geographical area call (for the area you are in) is received: ➥ Emergency alarm or beeps sound depending on the received category. ➥ “Geographic Distress,” “Geographic Safety,” “Geographic Urgency” or “Geographic Routine” appears in the display; then, the channel specified by the calling station is automatically selected for voice communications.
6 DSC OPERATION ■ DSC set mode Offset time This item sets the offset time from the UTC (Universal Time Coordinated) time. q Push [DSC/ENT] to select the DSC menu. w Rotate the channel selector to select “Set-up” and push [DSC/ENT]. Sel item RCV calls DTRS set ˘Set-up e Rotate the channel selector to select ‘Offset time,’ then push [DSC/ENT]. Set-up Add ID Delete ID ˘Offset time 26 r Set the offset time from the UTC (Universal Time Coordinated) time, then push [DSC/ENT].
DSC OPERATION 6 MMSI code check The 9-digit MMSI (DSC self ID) code can be checked in set mode. q Push [DSC/ENT] to select the DSC menu. w Rotate the channel selector to select “Set-up” and push [DSC/ENT]. Sel item RCV calls DTRS set ˘Set-up e Rotate the channel selector to select ‘MMSI check,’ then push [DSC/ENT]. Set-up Delete ID Offset time ˘MMSI check r Check the 9-digit MMSI (DSC self ID) code. MMSI check 123456789 t Push [DSC/ENT] to exit the condition.
6 DSC OPERATION ■ Receive messages The transceiver automatically stores up to 20 distress messages and 20 other messages. The messages can be used as an assistance to the logbook. q Push [DSC/ENT] to select the DSC menu. w Rotate the channel selector to select “RCV calls” and push [DSC/ENT]. • “RCV calls” does not appear until a distress call is received. Sel item ˘RCV calls DTRS set Set-up e Rotate the channel selector to select distress messages or other messages, then push [DSC/ENT].
INTERCOM OPERATION ■ Intercom operation • To adjust the HM-127’s speaker output level, push [Y]/[Z] after pushing [VOL]. The optional intercom function allows you to talk to the deck from the cabin. The optional HM-127 REMOTE-CONTROL MICROPHONE is required for intercom operation. Connect an optional HM-127 as described on p. 35. • Transmitting is impossible during intercom operation. • The received signal is muted during intercom operation. q Push [LO/DX•IC•SCR] for 1 sec. to enter intercom mode.
8 SET MODE ■ Set mode programming q Turn power OFF. w While pushing [16•9], turn power ON to enter set mode. e After the display appears, release [16•9]. r Push [16•9] to select the desired item, if necessary. t Rotate the channel selector to select the desired condition of the item. Use [Y]/[Z] when using an optional HM-127. y Turn power OFF, then ON again to exit set mode.
SET MODE ■ Set mode items 8 Weather alert Scan mode The transceiver has 2 scan modes: normal scan and priority scan. Normal scan searches all tag channels in the selected channel group. Priority scan searches all tag channels in sequence while monitoring channel 16. An NOAA broadcast station transmits a weather alert tone before important weather information.
8 SET MODE DSC watch DSC watch monitors channel 70 while you are receiving another channel. If a distress signal is received on channel 70, the transceiver monitors channel 16 and 70 alternately until the distress signal disappears. If a signal is received on another channel, DSC watch pauses until the signal disappears.
SET MODE LCD contrast This item adjusts the contrast of the LCD in 8 steps. Set mode LCD contrast LCD contrast 4 (default) The optional HM-127 has it’s own setting for the beep tone. Attenuation level This item sets the receive attenuation level for the attenuator function from 3 levels. Set mode Attenuation level 8 Scrambler code When an optional scrambler unit is connected, the scrambler code can be set depending on dealer setting.
9 CONNECTIONS AND MAINTENANCE ■ Supplied accessories ■ Antenna The following accessories are supplied: Qty. q Mounting bracket ............................................................ 1 w Microphone hanger (OPC-562) ...................................... 1 e Mic hanger screws (3 × 16) ............................................ 2 r Mounting screws (5 × 20) ............................................... 2 t Flat washers (M5) ...........................................................
CONNECTIONS AND MAINTENANCE ■ Connections q 9 r GPS RECEIVER JACK Connects to an optional GPS receiver to input the position data and time data. t r • A GPS receiver appropriate for the IC-M502 is not supplied from Icom. An NMEA0183 ver. 2.0 is required for position or time indication, etc. Ask your dealer about the GPS receiver. RCA e w q DC POWER CONNECTOR Connects the supplied DC power cable from this connector to an external 12 V DC power source.
9 CONNECTIONS AND MAINTENANCE ■ Mounting the transceiver • OVERHEAD MOUNTING Using the supplied mounting bracket The universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting. • Mount the transceiver securely with the 2 supplied screws (M5 × 20) to a surface which is more than 10 mm thick and can support more than 5 kg. • Mount the transceiver so that the face of the transceiver is at 90° to your line of sight when operating it.
CONNECTIONS AND MAINTENANCE Using the optional mounting bracket An optional MB-75 FLUSH MOUNT is available for mounting the transceiver to a flat surface such as an instrument panel. 9 r Attach the clamps on either side of the IC-M502. • Make sure that the clamps align parallel to the IC-M502’s body. CAUTION: KEEP the transceiver and microphone at least 1 meter away from your vessel’s magnetic navigation compass.
9 CONNECTIONS AND MAINTENANCE ■ Optional unit installation CAUTION: DISCONNECT the DC power cable from the transceiver before performing any work on the transceiver. Otherwise, there is danger of electric shock and/or equipment damage. w Remove the 4 screws from the shielding plate, then lift up the shielding plate. e Plug an optional unit to J6 on the MAIN unit as shown below. Follow the case opening procedure shown here when you want to install an optional unit, etc.
CONNECTIONS AND MAINTENANCE 9 ■ Dimensions 110.0 (4 11⁄32˝) 109.4 (4 5⁄16˝) 145.0 (5 23⁄32˝) 165.0 (6 1⁄2˝) 31.4 (1 1⁄4˝) 53.
10 TROUBLESHOOTING PROBLEM 40 POSSIBLE CAUSE SOLUTION REF. No power comes ON. • Bad connection to the power supply. • Check the connection to the transceiver. p. 35 No sound comes from the speaker. • Squelch level is too deep. • Volume level is too low. • Speaker has been exposed to water. • Internal speaker is turned OFF. • Set squelch to the threshold point. • Set [VOL] to a suitable level. • Drain water from the speaker. • Turn the internal speaker ON in set mode. p. 8 p. 8 — p.
CHANNEL LIST 11 Channel number Frequency (MHz) Channel number Frequency (MHz) Channel number Frequency (MHz) Channel number Frequency (MHz) USA INT CAN Transmit Receive USA INT CAN Transmit Receive USA INT CAN Transmit Receive USA INT CAN Transmit Receive 156.050 160.650 19A 64A 83A 156.050 156.050 20 20A 01 01 01A 02 02 156.100 160.700 03 03 156.150 160.750 03A 156.150 156.150 04 156.250 160.850 21 06 22A 23 21A 157.050 157.050 66A 66A 66A† 156.325 156.325 21b Rx only 161.
12 SPECIFICATIONS AND OPTIONS ■ Specifications General • Frequency coverage Transmit Receive • Mode Receiver : 156.025–157.425 MHz 156.050–163.275 MHz : FM (16K0G3E) DSC (16K0G2B) • Channel spacing : 25 kHz • Current drain (at 13.8 V) : TX high 6.0 A max. Max. audio 1.2 A max. • Power supply requirement: 13.8 V DC ±15% • Frequency stability : ±10 ppm (–20°C to +60°C; –4°F to +140°F) • Dimensions : 165(W) × 110(H) × 109.
SPECIFICATION AND OPTIONS 12 ■ Options • MB-75 FLUSH MOUNT For mounting the transceiver to a panel. • SP-5 EXTERNAL SPEAKER A large, external speaker for superior audio output. • SP-10 EXTERNAL SPEAKER A compact, external speaker. Features easy installation. • UT-98 VOICE SCRAMBLER UNIT (pgs. 10, 33) • UT-112 VOICE SCRAMBLER UNIT Ensures private communications. 128 or 32 codes are available. Not available in some countries. • HM-127 REMOTE-CONTROL MICROPHONE (p. 44) External microphone-type controller.
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Panel description The optional HM-127 remotely controls the IC-M502 and provides an optional intercom function. q w e r !0 o i u y t OPTIONAL w PTT SWITCH [PTT] (pgs. 8, 51) Push and hold to transmit; release to receive. Y]/[Z Z] e CHANNEL UP/DOWN SWITCHES [Y ➥ Push either switch to change the operating channel, set mode contents, etc. (pgs. 8, 51) ➥ While pushing [H/L], push [Y]/[Z] to adjust the brightness of the LCD and switch backlight. (p.
HM-127 REMOTE-CONTROL MICROPHONE 13 ➥ While pushing [H/L], selects one of 3 regular channels in sequence when pushed. (pgs. 6, 7, 50) • [PWR], [PTT], [VOL], [SQL] and [H/L] still function when the microphone key lock function is turned ON. • International, U.S.A. and Canadian channels are available for regular channels. ➥ Advance the cursor while in memory name programming condition. (pgs. 9, 56) i VOLUME/DIMMER SWITCH [VOL•DIM] ➥ [Y]/[Z] adjusts the audio level after pushing [VOL].
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Function display !8 !7 q w e r t CAN USA INT L ➥ In set mode, indicates the selected condition. (pgs. 30, 55) r VOLUME INDICATOR (p. 51) Appears while audio output level is adjusted. !6 !5 !4 !3 TX BUSY TAG CALL LOW WX ALT DUP DUAL P SCAN TRI SCRM LOCAL VOL SQL y !2 !1 !0 o i u q CHANNEL GROUP INDICATOR (pgs. 6, 50) Indicates whether an International (INT), U.S.A. (USA) or Canadian (CAN) channel is selected. w KEY LOCK INDICATOR (p.
HM-127 REMOTE-CONTROL MICROPHONE 13 !1 DUAL/TRI WATCH INDICATOR (pgs. 11, 54) “DUAL” appears during dualwatch; “TRI” during tri-watch. ■ HM-127 supplied accessories !2 WEATHER CHANNEL INDICATOR (pgs. 7, 50) ➥ “WX” appears when a weather channel is selected. ➥ “ALT” appears when the weather alert function is in use; flashes when an alert tone is received. Accessories included with the HM-127: Qty. q Connection cable (OPC-1000: 6 m; 20 ft) ...................... 1 w Mounting base ........................
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Installation The optional HM-127 can be connected to the transceiver directly, as well as via the supplied connection cable for longer distance remote operation. The connector of the connection cable can be installed into a cabinet, wall, etc., as a built-in plug. w To use the supplied cable as a wall socket, follow the following steps. e Using the mounting base, carefully mark off the 2 spots where the cable and screws will be fastened. r Drill holes at these marks.
HM-127 REMOTE-CONTROL MICROPHONE 13 Mounting base 5 mm; 3⁄16˝ 50 (d) mm; 131⁄32˝ 23 (d) mm; 29⁄32˝ 24 to 27 (d) mm (15⁄16 to 11⁄16˝) 2 mm; 3⁄32˝ Nut Gasket Cap 49
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Channel selection Channel 16 U.S.A., International and Canadian channels q Push [16] to select channel 16. w Push [CH/WX] to return to the condition before selecting channel 16, or push [Y] or [Z] to select operating channel. q Push [CH/WX] to select regular channel. • Push [CH/WX] again, if weather channel appears. w Push [CH/WX•U/I/C], while pushing [H/L], to select channel group. • U.S.A., International and Canadian channels can be selected in sequence.
HM-127 REMOTE-CONTROL MICROPHONE 13 ■ Receiving and transmitting q Push [PWR] to turn power ON. w Push [VOL], then [Y]/[Z] to adjust audio output level. • Push [SQL], then [Y]/[Z] to mute any audio nose, if necessary. e Push [Y]/[Z] to select the desired channel. • When receiving a signal, “ ” appears and audio is emitted from the speaker. • Further adjustment of audio level may be necessary at this point. • Use the optional voice scrambler function for privacy. (pgs.
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Lock functions ■ Display backlighting The lock function electronically locks keys and switches to prevent accidental changes and function access from the microphone. The function display and switches can be backlit for better visibility under low light conditions. And the backlighting condition can be adjusted independently from the transceiver. • All keys, switches and controllers on the transceiver are functional. q Push [VOL•DIM] for 1 sec.
HM-127 REMOTE-CONTROL MICROPHONE ■ Call channel programming q Push [CH/WX•U/I/C] several times while pushing [H/L] to select the desired channel group (USA, INT, CAN) to be programmed. w Push [16•9] for 1 sec. to select the call channel of the selected channel group. • “CALL” and call channel number appear. e Push [16•9] again for 3 sec. (until long beep changes to 2 short beeps) to enter call channel programming condition. • Call channel number and channel group to be programmed flashes.
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Starting a scan q Push [CH/WX•U/I/C] several times while pushing [H/L] to select the channel group (USA, INT, CAN), if desired. • When the weather alert function is in use, select the desired weather channel with [CH/WX] and [Y]/[Z]. w Push [SCN] to start priority or normal scan. • “SCAN” appears during normal scan. • The priority channel readout indicates “16”, and “P” and “SCAN” indicators appear during priority scan.
HM-127 REMOTE-CONTROL MICROPHONE 13 ■ Set mode programming Set mode is used to change the condition of the transceiver’s functions and the microphone’s own functions: Transceiver’s functions— scan mode (normal or priority), scan resume timer, weather alert, dualwatch/tri-watch selection, DSC watch, transceiver’s beep tone, internal speaker (transceiver), LCD contrast (transceiver), RF attenuation level, scrambler code and scrambler type.
13 HM-127 REMOTE-CONTROL MICROPHONE ■ Intercom operation ■ Channel names q Push [LO/DX•IC] for 1 sec. to activate the intercom function. q Push [Y]/[Z] to select a channel to program. • Push [CH/WX•U/I/C] several times while pushing [H/L] to select the channel group (USA, INT, CAN), if desired. • “IC” appears in the priority channel readout. • The channel name disappears. w While pushing [H/L], push [16•9]. • The 1st character of the currently programmed comment flashes. w Push [PTT] to talk.
TEMPLATE 149 (57⁄8˝) MB-75 4–R11 2 mm; 3⁄32˝ Cut here 24 to 27 (d) mm (15⁄16 to 11⁄16˝) 92 (35⁄8˝) HM-127 Unit: mm (inch)
Count on us! A-5663H-1EX-w Printed in Japan © 2000 Icom Inc.