User manual ICOM IC-F21GM

[. . . ] INSTRUCTION MANUAL UHF GMRS TRANSCEIVER iF21GM 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. SAFETY TRAINING INFORMATION Your Icom radio generates RF electromagnetic energy during transmit mode. This radio is designed for and classified as "Occupational Use Only", meaning it must be used only during the W ARN ING course of employment by individuals aware of the hazards, and the ways to minimize such hazards. This radio is NOT intended for use by the "General Population" in an uncontrolled environment. [. . . ] · Never mix old and new batteries. Either of the above may cause a fire hazard or damage the transceiver, if ignored. · Never incinerate used battery cells since internal battery gas may cause them to rupture. · Never expose a detached battery case to water. If the battery case gets wet, be sure to wipe it dry before using it. 11 SET MODE ` Set mode 4 Set mode is used for programming infrequently changed values or conditions of functions. · All settings performed with [CH selector], [OFF/VOL], [MONI], [PTT] and [W/N] keys. D SELECTING POWER RF OUTPUT [CH selector] [OFF /VOL] [MONI] [PTT] [W/N] The RF output can be selected from one of 3 modes. 13) D SETTING THE SIMPLEX/DUPLEX OPERATION The Simplex/Duplex function changes duplex operation to simplex operation. 13­14) D SETTING THE CTCSS TONE FREQUENCY CTCSS (Continuous Tone Coded Squelch System) encoder/decoder are standard, providing quiet stand-by. 15­16) D CTCSS FIND This transceiver can detect the CTCSS tone frequency in the received signal. 19) D SETTING THE DTCS CODE DTCS (Digital Tone Coded Squelch system) encoder/decoder are standard, providing quiet stand-by. 17­18) 12 2 CHAPTER CONTINUED D SELECTING RF OUTPUT POWER The transceiver has 3 output power levels to suit your operating requirements. Low out put power settings during short-distance communications may reduce the possibility of interference to other stations, and will reduce current consumption. q While pushing and holding [PTT], [MONI], turn [OFF/VOL] to power ON. w Push [MONI] to toggle between Low1 (1 W ; Pi), Low2 (2 W ; PiPi) and High (4 W ; PiPiPi). e Turn the power OFF, and then ON again. D SETTING THE SIMPLEX/DUPLEX OPERATION The Simplex/Duplex function changes duplex channels to simplex channels. q While pushing and holding [PTT], [MONI], turn [OFF/VOL] to power ON. w Turn CH selector knob to select the desired channel. e Push [W/N] to turn the simplex mode ON. or e Push and hold [W/N] to turn the duplex mode ON. r Turn the power OFF, and then ON again. NOTE: Duplex mode is available between CH 1 to CH 8. [. . . ] w Push [MONI] to increase the squelch level (tight squelch) or [W/N] to decrease the squelch level (loose squelch). · Squelch level will be fixed after 1 sec. ` Auto scan function Auto scan function proceeds in sequence from lower channel to higher channel numbers. Scanning searches for signals automatically and makes it easier to locate new stations for contact or listening purpose. · When receiving a signal, scan pauses until a signal disappears. [. . . ]