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INSTRUCTION MANUAL
VHF MARINE TRANSCEIVER
iM21
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IN CASE OF EMERGENCY RECOMMENDATION If your vessel requires assistance, contact other vessels and CLEAN THE TRANSCEIVER THOROUGHLY WITH FRESH the Coast Guard by sending a distress call on Channel 16. WATER after exposure to salt water. Otherwise, the transceiver’s keys, switches and controllers ❍ USING CHANNEL 16 may become inoperable due to salt crystallization. DISTRESS CALL PROCEDURE 1. “MAYDAY MAYDAY MAYDAY.” 2. “THIS IS ...........................” (name of vessel) 3. Your call sign or othe
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FOREWORD FEATURES Thank you for purchasing this Icom product. The IC-M21 VHF Water resistant construction MARINE TRANSCEIVER is designed and built with Icom’s su- Built tough to withstand the punishing marine environ- perior technology and craftsmanship. With proper care this ment, the IC-M21 meets JIS water resistant specification product should provide you with years of trouble-free operation. grade 7 while using BP-223 or BP-224. Dual watch and tri-watch functions* Convenient functions whi
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CAUTIONS BE CAREFUL! The transceiver’s right-side panel will RWARNING! NEVER connect the transceiver to an become hot when operating continuously for long periods. AC outlet. This may pose a fire hazard or result in an electric shock. BE CAREFUL! The IC-M21 employs water resistant construction, which corresponds to JIS water resistant speci- RWARNING! NEVER hold the transceiver so that the fication, grade 7 (1 m; 3 ft depth for 30 min.). However, once antenna is very close to, or touching exposed
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TABLE OF CONTENTS IN CASE OF EMERGENCY ................................................ i 5 SCAN OPERATION ................................................ 11–12 Scan types ................................................................. 11 RECOMMENDATION ........................................................... i Setting tag channels .................................................. 12 FOREWORD ....................................................................... ii Starting a scan
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OPERATING RULES 1 (2) OPERATOR’S LICENSE D Priorities A restricted Radiotelephone Operator Permit is the license • Read all rules and regulations pertaining to priorities and most often held by small vessel radio operators when a radio keep an up-to-date copy handy. Safety and distress calls is not required for safety purposes. take priority over all others. The Restricted Radiotelephone Operator Permit must be • You must monitor Channel 16 when you are not operating posted near the transceiver
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PANEL DESCRIPTION 2 Front, top and side panels q DIAL/CHANNEL GROUP SWITCH [DIAL] t TRANSMIT POWER/LOCK SWITCH • Selects and changes the regular channels. [H/L•LOCK] (p. 6) •Selects high, middle or low power when • Selects one of 2 regular channels in se- pushed. (p. 8) quence when pushed for 1 sec. (p. 6) •Toggles the lock function ON/OFF when o - International and U.S.A. (U.K. version only) pushed for 1 sec. (p. 7) i channels* are available for regular channels. *Germany version is Internati
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2 PANEL DESCRIPTION ï BATTERY CASE RELEASE SCREW CAUTION!: To remove the battery case: When attaching or releasing a battery pack, make sure the Turn the screw counterclockwise, then pull the battery pack rubber seal is set in the groove of the battery pack/case in the direction of the arrow as shown below. correctly. If the seal is not neatly in the groove it may be damaged when attaching the battery pack/case. To attach the battery case: If the seal is damaged, water resistant is not guarantee
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2 PANEL DESCRIPTION Function display q TRANSMIT INDICATOR (p. 8) Appears while transmitting. w BUSY INDICATOR (p. 8) Appears when receiving a signal or when the squelch q w e r t opens. e TAG CHANNEL INDICATOR (p. 12) y Appears when a tag channel is selected. ! u r SCAN INDICATOR (p. 12) Blinks while scanning. i ! t CALL CHANNEL INDICATOR (p. 6) Appears when the call channel is selected. o ! y LOCK INDICATOR (p. 7) ! Appears while the lock function is activated. u DUPLEX INDICATOR ! ! Appears
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2 PANEL DESCRIPTION o SUB CHANNEL READOUT ! TRANSMIT POWER INDICATOR • Indicates Channel 16 during priority scan. • “LOW” appears when low power is selected. (p. 8) • Indicates Channel 16 during dualwatch or tri-watch. • “LOW” blinks when switching forced low power mode be- (p. 10) cause of a high temperature error or low voltage. • Indicates the SET mode item while in SET mode • “MID”* appears when middle power is selected. (p. 8) *Except Germany version. ! BATTERY INDICATOR • No indicator appe
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BASIC OPERATION 3 Channel selection D International and U.S.A. channels D Channel 16 There are 57 International and 57 U.S.A. channels. These Channel 16 is the distress channel. It is used for establishing channel groups may be specified for the operating area. initial contact with another station and for emergency communications. Channel 16 is monitored during dualwatch q Push [DIAL] to select a regular channel. or tri-watch. While standing by you are required to monitor w Push [Y]/[Z] switche
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3 BASIC OPERATION Lock function Adjusting the squelch level This function electronically locks all keys, except [PTT], The IC-M21 has a squelch even though there is no control [SQL•MONI] and [H/L•LOCK] to prevent accidental channel knob for it. In order to receive signals properly, as well as for changes and function access. scan to function, the squelch must be adjusted to a suitable • Push [H/L•LOCK] for 1 sec. to turn the lock function ON and level. OFF. - Only [PTT], [H/L•LOCK] and [SQL•
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3 BASIC OPERATION IMPORTANT: To maximize the readability of your trans- Receiving and transmitting mitted signal, pause a few sec. after pushing [PTT], hold the microphone 5 to 10 cm (2 to 4 inches) from your CAUTION: Transmitting without an antenna may mouth and speak at a normal voice level. damage the transceiver. NOTE: The transceiver has a power save function to con- q Rotate [OFF/VOL] clockwise to turn power ON. serve the battery power and cannot be turned OFF. The - Use the squelch func
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3 BASIC OPERATION Call channel programming The call channel switch is used to select Channel 9 by de- r Push [Y]/[Z] to select the de- fault, however, you can program your most often-used chan- sired channel. nels in each channel group for quick recall. q Push [DIAL] for 1 sec. to select the desired channel group (INT, t Push [16•C] to program the dis- USA) to be programmed. played channel as the call chan- nel. - The call channel number and chan- nel group stop flashing. w Push [16•C] for 1 se
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DUALWATCH/TRI-WATCH 4 Description Operation Dualwatch monitors Channel 16 while you are receiving an- q Select the desired operating channel. other channel; tri-watch monitors Channel 16 and the call wPush [DW•TRI] momentarily to start dualwatch; push channel while receiving another channel. [DW•TRI] for 1 sec. to start tri-watch. - “DUAL” flashes during dualwatch; “TRI” flashes during tri-watch. - Beep tones sound when a signal is received on Channel 16. DUALWATCH/TRI-WATCH SIMULATION - Tri-w
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SCAN OPERATION 5 Scan types Scanning is an efficient way to locate signals quickly over a Set the tag channels (channels to be scanned) before scan- wide frequency range. The transceiver has a priority scan and ning. Clear the tag channels which inconveniently stop scan- a normal scan. ning, such as those used for digital communications. NOTE: Choose priority or normal scan in SET mode. (p. 13) PRIORITY SCAN NORMAL SCAN CH 01 CH 02 CH 01 CH 02 CH 88 CH 16 CH 03 CH88 CH 03 CH 05 CH 04 CH 05 CH 0
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5 SCAN OPERATION Setting tag channels Starting a scan For more efficient scanning, add desired channels as tag Set scan type and scan resume timer in advance using SET channels or clear tag channels for unwanted channels. Chan- mode. (pgs. 13, 14) nels set as non-tag channels will be skipped during scanning. Tag channels can be assigned to each channel group (INT, q Select the desired channel group (INT, USA) by pushing USA) independently. [DIAL] for 1 sec., if desired. w Push [SCN•TAG] to s
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SET MODE 6 SET mode programming SET mode items D Beep tone “bP” SET mode is used to change the conditions of 11 transceiver You can select silent operation by turning beep tones OFF or functions: beep tone, scan type, scan resure timer, auto scan, you can have confirmation beeps sound at the push of a monitor action, automatic backlighting, LCD contrast, auto switch by turning beep tones ON. power save, self check, battery voltage and S/RF meter. • AUTO (At): Beep tone is linked with volume
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6 SET MODE D Scan resume timer “St” D Monitor action selection “Sq” The scan resume timer can be selected as a pause (OFF) or The monitor function cuts off the squelch function temporarily. timer scan (ON). When OFF is selected, the scan pauses This selection contains PUSH or HOLD settings as shown until a received signal disappears. When ON is selected, the below. scan pauses for 5 sec. after receiving a signal and then re- • PUSH (Pu): After pushing the [SQL•MONI] for 1 sec., the sumes even if
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6 SET MODE D LCD contrast selection “LC” D Self check function “SC” The contrast of the LCD can be adjusted from 4 levels. The self check function checks transceiver conditions by it- • 1 (low contrast) – 4 (high contrast); 3 (default) self, and informs you in case a problem is found. The follow- ing items are checked after the power is turned ON, then it switches to operation mode. • Temperature (Outside of –15°C to +55°C) • Connected battery voltage • Water intrusion LCD contrast (default) D A
