 Microphone (HM-36)q UP/DOWN SWITCHES [UP]/[DN]Change the selected readout frequency or memorychannel.• Continuous pushing changes the frequency or memorychannel number continuously.• While pushing [XFC], the transmit readout frequency canbe controlled while in spilt frequency operation.• The [UP]/[DN] switch can simulate a key paddle. Presetin the keyer set mode. (p. 34)• MICROPHONE CONNECTOR(Front panel view)• HM-36 SCHEMATIC DIAGRAMw PTT SWITCHPush and hold to transmit; release to receive.CAUTION: DO NOT short pin 2 to ground as thiscan damage the internal 8 V regulator.NOTE: DC voltage is applied to pin 1 for micro-phone operation. Take care when using a non-Icommicrophone.y GND (PTT ground)t PTTr Main readout squelch switchq Microphone inputw +8 V DC outpute Frequency up/downu GND(Microphone ground)i Main readout AF output(varies with [AF]/[BAL])qw[MIC] FUNCTION DESCRIPTIONPin No.w +8 V DC output Max. 10 mAeFrequency up GroundFrequency down Ground through 470 ΩrSquelch open “Low” levelSquelch closed “High” level++qwe r tyui4700p4700p10μ0.33μMICROPHONEMICELEMENT2k470DOWN UPPTT RECEIVETRANSMITMICROPHONE CABLE MICROPHONE PLUG121PANEL DESCRIPTION

instruction manual

quick reference guide

PANEL DESCRIPTION

Front panel

rear panel

d data socket

lcd display

Microphone (HM-36)

CONNECTIONS

Advanced connections

Power supply connections

Linear ampliﬁer connections

BASIC OPERATION

Selecting VFO/memory mode

Frequency setting

d band edge warning beep

Operating mode selection

Basic transmit operation

RECEIVE AND TRANSMIT

d about cw reverse mode

Electronic keyer functions

d memory keyer send menu

d editing a memory keyer

d contest number set mode

rise time

Noise blanker

rtty functions

d rtty decoder

rtty shift

Noise reduction

VOX function

d tone squelch operation

d dtcs operation

Split frequency operation

Memory channels

set 
 mode

Icom IC-746PRO Instruction Manual

I Front panel

I Rear panel

I LCD display

I Multi function switches

PANEL DESCRIPTION ........... 1

I Unpacking

I Required connections

I Advanced connections

I Power supply connections

I Linear ampliﬁer connections

I Initial settings

I Selecting an operating band

I Selecting VFO/memory mode

I Frequency setting

I Operating mode selection

I Squelch and receive (RF sensitivity

I Basic transmit operation

I Operating SSB

I Operating CW

I Electronic keyer functions

I Operating RTTY (FSK)

I RTTY functions

I Operating AM

I Operating FM

I Repeater operation

I Simple band scope

I Preamp/Attenuator

I AGC function

I IF ﬁlter selection

I IF (DSP) ﬁlter shape

I Twin PBT operation

I Noise reduction

I Voice squelch control function

I VOX function

I Break-in function

I ∂TX function

I Speech compressor

I Split frequency operation

I Quick split function

I Measuring SWR

I Memory channels

I Programming a memory

I Selecting the call channel

I Frequency transferring

I Programming scan edges

I Assigning memory names

memo pads

I Scan types

I Programmed scan/Fine programmed scan

I Memory scan operation

I ∂F scan operation and Fine ∂F scan

I Tone scan/DTCS code scan operation

I Antenna connection and selection

I Antenna tuner operation

I Optional external tuner operation

I Connections

I Packet (AFSK) operation

I Adjusting the TNC output level

I General set mode

I Tone control set mode

I Opening the transceiver's case

I Trouble shooting

I Fuse replacement

I Resetting the CPU

I Remote jack (CI-V) information

SPECIFICATIONS

OPTIONS

IC-746PRO

specifications