 Functions for receive (continued)DD Clarity controlVoice signals received from other stations may be diffi-cult to receive. This may sometimes happen if a sta-tion is transmitting slightly off frequency. In such cases,you can compensate by using the clarity control.q Push [F] then [RX CLAR] to switch the function ONand OFF.• “CLAR” and shifting value with direction appear.w Rotate [CH] to improve the audio readability.• Adjustable between ±150 Hz in 10 Hz steps.[RX CLAR ][CH] [F]124 RECEIVE AND TRANSMIT FSK operationThe transceiver has FSK and J2B modes for FSK op-eration— use F1B when using the built-in oscillator;use J2B when using an AFSK terminal unit.q Connect an FSK terminal unit to the [AF/MOD]socket as shown at right.w Select the desired channel to operate FSK mode.• FSK ITU channel group, Ch 4001 to Ch 25040, are onlyavailable when SITOR CH setting is set to ON. (p. 43)e Push [MODE SET ] several times to select F1B(FSK) or J2B (AFSK).r Operate the FSK terminal unit.NOTE:➥ FSK tone, shift frequency and FSK polarity canbe adjusted in initial set mode (p. 45)➥ Some transceivers may operate 1.7 kHz higherthan the IC-M801E’s J2B mode even when thesame displayed frequencies are in use.FSK terminal unit connection1569To pin 6To pin 9To pin 5FSK keyingAF inputFSK terminal unitAF groundTx/Rx controlGroundTo pins 3, 4DD Tuner through functionIn the combination with IC-M801E and optional AT-141, the tuner through function can be used.By bypassing the tuner unit, the receiver gain in par-ticular frequency band may be improved dependingon your antenna element length.➥ While “TUNE” is displayed, push [F] then[TUNE THRU ] to tuner through function ON.• “THRU” appears instead of “TUNE” indicator.• Push [TUNE THRU] to turn the function OFF.[TUNE THRU ] [F]

explicit definitions

quick reference

GUIDELINES

PANEL DESCRIPTION

main unit

I Handset (HS-98)

I LCD screen

I Selecting a channel

RECEIVE AND TRANSMIT

I Functions for receive

I FSK operation

CHANNEL NAME PROGRAMMING

DSC PREPARATION

I Position and time programming

CALL PROCEDURE

I Individual call

I Group call

I Geographical call

I Semi/Auto (telephone) call

WHEN RECEIVING A CALL

I Received information

I Distress call

I Distress relay call

I Geographical area call

I Memory writing

dsc menu operation

I Frequency input

I Verifying self-ID

I Memory reading/deleting

set mode

I Initial set mode

I Supplied accessories

I Basic connections

I Advanced connections

I Ground connection

I Power source

I Mounting

I Using the optional MB-108

I Using the optional MB-75

I Transceiver dimensions

I Fuse replacement

I Connector information

frequency programming

I Programming a frequency

SPECIFICATIONS

OPTIONS

I Speaker (SP-24E)

ABOUT CE

Icom IC-M801E Instruction Manual

IC-M801E