92BASIC OPERATION2 Call procedureWhen your system employs tone signaling (excluding CTCSSand DTCS), the call procedure may be necessary prior to voicetransmission. The tone signalling employed may be a selec-tive calling system which allows you to call specific station(s)only and prevent unwanted stations from contacting you.q Select the desired TX code channel, 2/5-tone code,Individual ID code* or Talkgroup ID code* according toyour System Operator’s instructions.• This may not be necessary depending on programming.• Refer to pgs. 10–12 for selection.*Digital mode operation only.w Push the call key (assigned to one of the dealer program-mable keys; except for the Digital mode operation) or [PTT].e After transmitting, the remainder of your communicationcan be carried out in the normal fashion. Receiving and transmittingReceiving:q Push [ ] to turn the power ON.w Push [CH Up] or [CH Down], or rotate [CH Up/Down] toselect a channel, in sequence.e When receiving a call, adjust the audio output level to acomfortable listening level.Transmitting:Wait for the channel to become clear to avoid interference.q Take the microphone off hook.• 2-tone, 5-tone mute may be released. (The ‘audible’ condition isselected and BUSY indicator lights green.)• A priority channel may be selected automatically.w Wait for the channel to become clear.• The channel is busy when BUSY indicator lights green.e Push [CALL] when initiating a call from your side.• Coded audio may be heard from the transceiver, then “ ”appears.• This operation may not be necessary depending on your signal-ing system. Ask your dealer for details.r While pushing and holding [PTT], speak into the micro-phone at your normal voice level.t Release [PTT] to receive.IMPORTANT: To maximize the readability of your signal;1. Pause briefly after pushing [PTT].2. Hold the microphone 5 to 10 cm (2 to 4 inches) fromyour mouth, then speak into the microphone at a normalvoice level.Selective callingNon-selective calling

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