132BASIC OPERATION2 User set modeUser set mode is accessed with [User Set Mode] and allowsyou to set seldom-changed settings. In this case you can“customize” the transceiver operation to suit your preferencesand operating style.Entering the user set mode:q While pushing and holding [P1] and [P2], push [ ] to turnthe power ON. Then, push and hold [P0] to enter user setmode.w Push [P0] several times to select the appropriate item.Then, push [Up] or [Down] or rotate [DIAL] to set thedesired level/condition.• Available set mode functions are Backlight, LCD Contrast,Beep, Beep Level, SQL Level, AF Min Level, Mic Gain andHorn.e Push [ ] again to exit set mode.User set mode is also available via a programmable key.Please refer to p. 7 [User Set Mode] section. Scrambler functionThe voice scrambler function provides private communicationbetween stations. The frequency inversion type is equippedto all versions, moreover, the optional Rolling or Non-rollingtype can be available.q Push [Scrambler] to turn the scrambler function ON.• “ ” appears.w Push [Scrambler] again to turn the scrambler functionOFF.• “ ” disappears.[ ][P0] [Up]/[Down] or [DIAL][P1][P0] [P2] [ ]

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