User manual ICOM IC-451A-E

[. . . ] Hearing experts advise against continuous high volume operation. If you experience a ringing in your ears, reduce the volume level or discontinue use. EXPLICIT DEFINITIONS The explicit definitions below apply to this instruction manual. WORD R WARNING CAUTION NOTE DEFINITION Personal injury, fire hazard or electric shock may occur. No risk of personal injury, fire or electric shock. NEVER connect the transceiver to an AC outlet or to a power source of more than 16 V DC. [. . . ] 11) q Set volume 3 NOTE: The transceiver has a power save function to conserve battery power. The power save function activates automatically when no signal is received for 5 sec. w Select the desired channel with the [Y]/[Z] switches. · When receiving a signal, "BUSY" appears and audio is emitted from the speaker. · Further adjustment of [VOL] may be necessary at this point. · Push [­] to toggle the monitor function ON and OFF. 6) r Push to transmit t Release to receive w Select channel w Monitor switch e Set output power r Speak into microphone e Push [LOW] to select the output power if necessary. · "LOW" appears when low power is selected. · Choose low power to conserve battery power, choose high power for longer distance communications. r Push and hold [PTT] to transmit, then speak into the microphone. · Transmit indicator lights. t Release [PTT] to receive. IMPORTANT: To maximize the readability of your transmitted signal, pause a few sec. after pushing [PTT], hold the microphone 10 to 15 cm from your mouth and speak at a normal voice level. 5 3 BASIC OPERATION s Display backlighting The transceiver has display backlighting with a 5 or 10 sec. The display backlighting can be turned ON continuously or turned OFF, if desired. Push any switch except [PTT] to turn the backlighting ON. · When the 5 or 10 sec. to set the channel to the priority channel. Priority indication Scanning channel e Push [SCN] to start group or priority scan. - Cancelling tag channels speeds up the scan interval. For open scan, cancel the tag channel setting to skip undesired channels such as usually busy channels. All memory channels may be set as tag channels by default. For group scan, set only often-used channels as tag channels. All memory channels may be set as tag channels by default. r When receiving a signal, scan pauses and resumes according to the selected scan resume condition. 10) t Push [SCN] to stop the scan. 9 4 SCAN OPERATION s Scan resume condition [ The scan resume condition can be selected as a pause or timer scan. w Push [LOW] several times until "SC" appears. e Push [Y] or [Z] to select the scan resume timer. - "t-05" : Scan pauses 5 sec. - "t-10" : Scan pauses 10 sec. - "t-15" : Scan pauses 15 sec. - "P-05" : Scan pauses until the signal disappears and then resumes 5 sec. thereafter. Pauses until the signal disappears. 15 sec. [. . . ] · Set scan tag to desired channels. · Turn beep tones ON in SET mode. 15 · The monitor function is activated. · Beep tones are turned OFF. No beep sounds. 17 9 SPECIFICATIONS D Transmitter : 450. 000­480. 000 MHz (Incl. [. . . ]