535 FUNCTIONS FOR RECEIVE Noise reductionThe noise reduction function reduces noise compo-nents and picks out desired signals which are buriedin noise. The received signals are converted to digitalsignals and then the desired signals are separatedfrom the noise.q Push the [NR] switch to turn the noise reductionON.• “NR” appears.w Rotate the [NR] control to adjust the noise reductionlevel.e Push the [NR] switch to turn the noise reductionOFF.• “NR” disappears.Deep rotation of the [NR] control results in audio sig-nal masking or distortion. Set the [NR] control formaximum readability. Notch functionThis transceiver has auto and manual notch functions.The auto notch function automatically attenuates morethan 3 beat tones, tuning signals, etc., even if they aremoving. The manual notch can be set to attenuate afrequency via the [NOTCH] control.➥ Push [A/NOTCH] to toggle the notch function be-tween auto, manual and OFF in SSB and AMmodes.➥ Push [A/NOTCH] to turn the manual notch functionON and OFF in CW mode.➥ Push [A/NOTCH] to turn the auto notch function ONand OFF in FM mode.• Set to attenuate a frequency for manual notch via the[NOTCH] control.• “A NOTCH” appears when auto notch is in use.• “NOTCH” appears when manual notch is in use.While operating the manual notch, noise may beheard. This comes from the DSP unit and does notindicate an equipment malfunction. Dial lock functionThe dial lock function prevents accidental changescaused by the tuning dial.➥ Push [LOCK/SPCH] to turn the dial lock function ONand OFF.• “LOCK” indicator lights while the dial lock function is ac-tivated.A G C D U P C M P T B W S C P[A/NOTCH] [NOTCH]Notch function indicatorsA G C D U P C M P T B W S C P[NR] [NR]Appears[LOCK/SPCH]Lights while the dial lock function is activated.

quick reference guide

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

Icom IC-746PRO Instruction Manual

i746PRO

IC-746PRO