294CONNECTION AND MAINTENANCE4 AntennaA key element in the performance of any communication sys-tem is an antenna. Contact your dealer about antennas andthe best places to mount them. Fuse replacementA fuse is installed in the supplied DC power cable. If a fuseblows or the transceiver stops functioning, track down thesource of the problem if possible, and replace the damagedfuse with a new rated one.❑ Fuse rating: 20 AUSE the 20 A fuse only. CleaningIf the transceiver becomes dusty or dirty, wipe it clean with asoft, dry cloth.AVOID the use of solvents such as benzene oralcohol, as they may damage the transceiver sur-faces. Options• RMK-2 SEPARATION KIT +OPC-607/OPC-608/OPC-609 SEPARATION CABLEAllows you to install the transceiver main unit separatelyfrom the front panel for operating convenience.• SP-5/SP-22 EXTERNAL SPEAKERInput impedance : 4 ΩMax. input power : 5 WSP-5 : Large speaker for good audio quality.SP-22 : Compact and easy-to-install. The same as suppliedwith the transceiver (depending on version.)• HM-100TN/HM-100N/HM-148 HAND MICROPHONEHM-100TN : Hand microphone with a DTMF keypad.HM-148 : The same as supplied with the transceiver(depending on version.)• SM-25 DESKTOP MICROPHONE• UT-109 (#02)/UT-110 (#02) SCRAMBLER UNITSNon-rolling type (UT-109)/Rolling type (UT-110) voicescrambler unit provides higher communication security.• UT-111 LTR TRUNKING BOARDProvides trunking operation.• OPC-617 ACC CABLEAllows you to connect to an external terminal.

explicit definitions

panel description

I Function display

I Programmable function keys

I Channel selection

I Call procedure

D Transmitting notes

D TX code number edit

D Individual ID code selection

I Scrambler function

I Receiving a call

D Group call

I Transmitting a call

D Direct code entry

D Receiving a status message

D Received message selection

I Transmitting a status

D General

D Programming an SDM memory

I Position data transmission

I Stun function

connection and maintenance

I Supplied Accessories

I Mounting the transceiver

I Optional UT-109 or UT-110 installation

I Antenna

SAFETY TRAINING INFORMATION

Icom IC-F1721 Instruction Manual

IC-F1721

i programmable function keys

mdc 1200 operation

i receiving a call

IC-F1721D

IC-F1821

IC-F1821D

IC-F2721

IC-F2721D

IC-F2821

IC-F2821D