 Rear panelq DC POWER SOCKET [DC 13.8V] (pgs. 14, 16)Accepts 13.8 V DC through the supplied DC powercable (OPC-025D).w ANTENNA CONNECTOR [ANT 144MHz]e ANTENNA CONNECTOR 2 [ANT2]r ANTENNA CONNECTOR 1 [ANT1](pgs. 14, 15, 17, 74)Accept a 50 Ω antenna with a PL-259 connector.• [ANT 144MHz] for 144 MHz band only; [ANT1]When using an optional AH-4 HF/50 MHz AUTO-MATIC ANTENNA TUNER , connect it to the [ANT1]connector. The internal antenna tuner activates for[ANT2] and deactivates for [ANT1] when connectingthe AH-4.t DATA SOCKET [DATA] (pgs. 15, 77)Connects a TNC (Terminal Node Controller), etc. fordata communications.• See p. 8 for connector information.y EXTERNAL SPEAKER JACK [EXT SP](pgs. 15, 100)Accepts a 4–8 Ω speaker.u CI-V REMOTE CONTROL JACK [REMOTE] (p. 94) Designed for use with a personal computer for re-mote control of transceiver functions. Used for transceive operation with another IcomCI-V transceiver or receiver.i SEND CONTROL JACK [SEND] (p. 17)Goes to ground while transmitting to control exter-nal equipment such as a linear amplifier.• Max. control level: 16 V DC/0.5 Ao ALC INPUT JACK [ALC] (p. 17)Connects to the ALC output jack of a non-Icom lin-ear amplifier.!0 ACCESSORY SOCKET 2 [ACC(2)]!1 ACCESSORY SOCKET 1 [ACC(1)]Enable connection of external equipment such as alinear amplifier, an automatic antenna selector/tuner, TNC for data communications, etc.• See p. 8 for socket information.!2 STRAIGHT KEY JACK [KEY] (p. 14)Accepts a straight key or external electronic keyerwith 1⁄4 inch standard plug.• [ELEC-KEY] on the front panel can be used for a straightkey or external electronic keyer. Deactivate the internalelectronic keyer in keyer set mode. (p. 34)!3 TUNER CONTROL SOCKET [TUNER](pgs. 15, 76)Accepts the control cable from an optional AH-4HF/50 MHz AUTOMATIC ANTENNA TUNER .If you use an external electronic keyer, makesure the voltage retained by the keyer is lessthan 0.4 V when the key is ON.!4 CALIBRATION POT [CAL] (p. 93)This is used for frequency calibration.• The transceiver has been adjusted and calibrated thor-oughly at the factory. Under normal circumstances, thefrequency does not need to be re-calibrated.!5 GROUND TERMINAL [GND] (pgs. 13, 14)Connect this terminal to a ground to prevent electri-cal shocks, TVI, BCI and other problems.(+)(_)Rear panel view!5 !3 tr!2 !1 !0 o i u yq w e!471 PANEL 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