HF/50MHz ALL MODE TRANSCEIVER

The 756PRO Series L

Icom and the renowned IC-756PRO series continue to make ham radio history:

• First 32-bit floating point DSP transceiver• First transceiver with customizable filter shapes. There were no optional filters to buy, for none were needed.• First mid-class HF transceiver with +30dBm-class third-order intercept point* • First amateur HF transceiver with a large TFT color LCD

For the new IC-756PROIII, Icom’s combined the cutting-edge receiver technology of the IC-7800 with the familiar ergonomics of the IC-756PROII.

Take your DXing to the next level with Icom’s IC-756PROIII.(*in the 14MHz band)

Legacy Continues to Grow

New receiver gives +30dBmthird-order intercept point*Using receiver design techniques intro-duced in the IC-7800, Icom’s engineeringteam focused on producing a distortion-free, high-dynamic-range. To achieve thisgoal, Icom used higher-grade componentsin vital receiver sections of the IC-756PROIII.* Under the condition of receive frequency 14.2MHz, input frequencies

14.3MHz and 14.4MHz, Pre-amp OFF, mode USB BW: 2.4kHz

Large inductorsThe IC-756PROIII uses large inductors in-stead of small coils in the bandpass filter(BPF) stage, because small coils sometimescause magnetic sat-uration in the BPFstage. Large induc-tors can handle bothstrong signals andweak signals withlower distortion.

Low-distortion BPF switchingThe BPF switching circuitry is one of thecritical points in a receiver where distortioncan be produced by strong out-of-band sig-nals. Distortion at this early receiver stage

then propagates throughout the remainingstages and cannot be removed by signalprocessing. The IC-756PROIII uses lowdistortion diodes with wide frequency char-acteristics that prevent formation of distor-tion components in the BPF stage.

Fundamental-type 64MHzroofing filterThe IC-756PROIII uses a fundamental-mode monolithic crystal filter for the roofingfilter. Although it’s more expensive thanovertone-mode filters, the fundamental-mode filter has a better shape factor and isless susceptible to intermodulation distor-tion under strong-signal conditions.This is the same15kHz crystal filterused in the IC-7800roofing filter circuit.

Two newly designed preamplifiersTo minimize distortion and maximize dy-namic range, the IC-756PROIII preampli-fiers use the same basic circuit design asthe IC-7800 preamplifiers. Preamp-1 is anoiseless feedback design, with push-pullamplifiers. This design has a high intercept

Fundamental-type roofing filter

The 756PRO Third

Large inductors in the RF stage

The 756PRO Third Generation’s new features

point and covers a wide frequency range.Preamp-2, which uses bipolar transistorsfor higher gain, is ideal when you use sep-arate low-efficiency receiving antennassuch as small loops or Beverages.

Real time spectrum scopewith mini scope functionThe real time spectrum scope is now an in-dispensable tool for top performing HF ra-dios. The IC-756PROIII’s spectrum scopeadds a mini scope function, as requestedby many PROII users. The mini scope al-lows you to monitor the scope screen whileyou use other function menus. For exam-ple, you can monitor the scope screeneven while you are changing the IF filtershape and passband width. The scoperange can be set in 4 steps ±12.5 kHz, ±25kHz, ±50 kHz and ±100 kHz, centered on

the receiving frequency. In addition, thespectrum scope has 3 attenuator levels(10dB, 20dB and 30dB).

Eight-channel RTTY TX memoryThe IC-756PROIII has 8 channels of RTTYtransmit memory. You can edit and send upto a 62 character message for each mem-ory channel without a PC or other externalunit*. The transmit memory is displayed onthe screen so you won’t send the wrongmessage. The built-in RTTY demodulatorand decoder allow you to check the callsignof the station on the air instantly. A PC orexternal unit is not also necessary. * When writing and

sending RTTY mes-

sages on site, a Termi-

nal Unit, TNC or PC

and dedicated soft-

ware is required.

Adjustable SSB transmit BWThe SSB transmit bandwidth is selectablefrom 100, 300 and 500Hz at the high-passedge, and 2500, 2700 and 2900Hz at thelow-pass edge respectively. 3 types of highand low combinations can be stored in thememory. In addition, the built-in audioequalizer has separate bass and treble ad-justments for a total of 121 combinations,so you can tone your voice up or down asyou want. With thisflexible DSP-basedwaveform shaping,you can tailor yourtransmit audio qual-ity to suit your oper-ating style.

Other new features • New 60 meter band coverage, equivalent

transmit power and antenna tuner capa-bilities to the other bands.(U.S.A. version, USB mode only)

• 2 clocks show different time zones atonce, such as local and UTC time.

• Screen saver function• @ code (• – – • – • ), used in e-mail ad-

dresses, added to memory keyerRTTY transmit memory screen

SSB transmit bandwidth setting

Mini scope screen Normal spectrum scope screen

d Generation’s new features

Preamp-1 Preamp-2RF stage & Preamplifiers

32-bit floating point DSP & 24-bit AD/DA convertersThe heart of the IC-756PROIII is theproven combination of the 32-bit floatingpoint DSP and 24-bit AD/DA converters.This powerful combination supports manydigital processing features exclusive to theIC-756PROIII, which cannot be achievedwith traditional analog processors. The 24-bit AD/DA converter has an ultra-wide dy-namic range. Thereceiver delivers a dis-tortion-free, clearsound in any signalcondition, from a weaksignal to a strong fullpower station.

AGC loop managementThe digital IF filter and manual notch filterare included in the AGC loop driven by theDSP. This architecture completely elimi-nates “AGC pumping” caused by adjacentstrong signals out of the IF filter passband.In addition, programmable AGC time con-stants* (slow, medium, and fast presets) giveflexibility and speed needed for working thepile-ups. * Except FM mode.

Dual watchThe dual watch* function allows you to re-ceive 2 signals on the same band simulta-neously. You can listen to your favorite netwhile keeping an eye or ear on the DX sta-tion. The signal strength balance betweenthe main and sub frequencies is adjustablefrom the balance knob. (* Same band only)

Digital twin PBTDSP-based twin passband tuning (PBT)helps eliminate interference by changing theIF filter bandwidth and/or shifting the centerfrequency. With the digital IF filters, the PBTperformance allows you to cut away all theinterference and noise to hear the actualsignal. The LCD indicates the twin PBT con-ditions across the top of the screen.

Manual notch functionAn incredible 70dB of attenuation is at yourcommand with the manual notch. Eliminatestrong adjacent signals or beat tone noise,without reducing the performance of theAGC gain.

455k

Hz

36kH

z

3Lo

ManualNOTCH

IFFilter

DET

AGC

AGCDSPD/A

A/D

20

–20

–40

–60

–80

–100–600 –400 –200 0 200 400 600 800 [Hz]

[dB]

0

–800

Manual Notch characteristics

Inherited Propert

Sharp and soft filter shapes are selectable for SSB and CW mode

Select an appropriate filter shape that favors your operating style or band conditions.Independent SSB and CW filter gives you the flexibility.

SSB Sharp FilterThe perfect filter shape factor when sig-nal fidelity or pinpoint accuracy isneeded! A sharp slope from the filteredges gives full audio response whileeliminating any adjacent interference.

CW Sharp FilterThe “too good to be true” CW filter! Thesteep filter skirts — only 200Hz from the–6dB to the –60dB points — allow you tohear a weak CW signal that is sur-rounded by strong ones. DX hunters willhave to try thisone to really seethe magic of theSharp CW filter.

SSB Soft Filter The perfect filter shape factor when try-ing to pick out a weak signal! Therounded filter shape resembles a tradi-tional analog filter, by rolling off the highand low ends of the passband. Althoughmaintaining the steep filter skirt charac-teristics of a digital filter, the soft filter in-creases the signal-to-noise ratio of theintended signal.

CW Soft FilterRunning a pile-up has become easierwith the soft CW filter. By broadening thefilter skirt, the characteristics of the softfilter perform much like a mechanical fil-ter without the ringing.

Filter shape setting – SSB, CW, sharp

Inherited Properties From the 756PROII

Automatic notch function Eliminate annoying AM carriers, amplifier orradio tune up interference with a push of abutton. The automatic notch tracks 2 ormore interfering signals simultaneouslywithout intended signal loss or distortion.Very helpful on 80 and 160 meters.

Adjustable noise reductionThe 32-bit DSP processing power pro-duces real results by separating signalcomponents from the noise with the vari-able Noise Reduction. By suppressing thenoise components, an outstanding Signal-to-noise ratio is achieved, providing clear,clean audio in all modes without distortionof the target signal.

Adjustable noise blankerReduce annoying QRN from pulse-typenoise such as engine ignition systems andsparking appliance motors, with the fullyadjustable (101 steps) noise blanker.

Digital voice recorderThe Digital Voice Recorder (DVR) is a veryconvenient function for contests, DXpedi-tions and even normal operation. Recordyour callsign, CQ, or other station informa-tion into four memory locations. A total of90 seconds is available for the four memo-ries, with each memory channel being softpartitioned to allow custom recording sizes.A quick push of the front-panel DVR buttonallows you to record received signal into theR4 memory. The playback automaticallymutes the receiver for clear playback of theprevious 15 sec-onds of recordedaudio. The perfectfeature for thosecontest operatorswanting to improvetheir UBN.

CW memory keyerA must have feature for the CW operator,the internal memory keyer provides 4 mem-ories for programming station information,calling CQ and callsign. Each memory hasa capacity of 55 characters, as well asother time saving functions such as auto-

matic repeat, serial contest number auto-counter, and morse cut number functions.

Digital RF speech compressor The IC-756PROIII utilizes the 32-bit DSPfor the RF speech compressor providingthe maximum punch without the fuzzysound. Great for breaking through the noiseand hash to complete the QSO.

Highly stable transmitterFor a big, clear signal, the IC-756PROIIIuses two 2SC5125 transistors in the PAUnit. Along with superior IMD characteris-tics, these transistors have plenty of powerto allow for 100W full duty cycle operation.Advanced design considerations along withan aluminum, die-cast frame, and largecooling fan, help to stabilize the PA circuitproviding full duty cycle operation.

High stability crystal unitThe IC-756PROIII incorporates a high-sta-bility master oscillator, providing ±0.5ppm(–10ºC to +50ºC). A must for RTTY, SSTV orM A R Soperation.

Triple band stacking registerHop around the band with Icom’s exclusivetriple band stacking registers. Each bandremembers the last 3 frequencies, modeand other settings used.

SSB data communicationWhen the IF filter passband is reduced to500Hz or less in SSB/SSB data mode, spe-cial bandpass filters are automatically se-lected. The BPF automatically sharpen forbetter rejection of interfering signals. Alongwith the BPF, the IC-756PROIII automati-cally turns off the compression and enablesthe 1/4-tuning step for easier operation andmore accurate tuning. Perfect for PSK31,SSTV or other AFSK modes.

5-inch TFT color LCDEnjoy the full 5-inch TFT color display. TheIC-756PROIII has 8 colors of display set-tings and 7 types of font settings. Variousinformation is indicated on the color LCD,separated into an upper and lower screen.The lower screen can spread vertically toincrease the information viewing area.

Other features[Antenna and receiver] • Built-in high-speed auto antenna tuner • 2 TX/RX an-tenna connectors and RX antennaconnector • 30kHz–60MHz general cover-age receiver* • Built-in RX attenuator(6/12/18dB) • Twin peak audio filter forRTTY reception

[Transmitter] • Tx monitor function • Toneencoder • VOX operation • All mode powercontrol • External Control for Voice Memoryand Memory Keyer

[CW mode] • CW Wave form controlled bythe DSP • Multi-function electronic keyer in-cludes adjustable keying speed anddot/dash ratio, polarity, bug keyer • Contin-uously adjustable CW pitch control from300–900Hz • Double key jacks (Front andrear panels) • Full break-in (QSK) • CW re-verse

[Operation] • Set mode menu for speedysetting • Analog and digital meter indicatesrelative output power, SWR, ALC level andcompression level • Memory pad stores upto 5 or 10 operating frequencies andmodes • Quick split function • RF gain andsquelch control • ±9.999kHz Adjustable RITand ∂TX • 1Hz step tuning and display • 101 memory channels with 10-characterchannel name • Optional Voice synthesizerannounces the operating frequency, modeand signal strength in English • Program, memory, select memory, ∂fscans • Auto tuning step function • Dial lock• Band edge beep (can be disabled)• AH-4 control circuit • Automatic tuningspeed • CI-V interface with optional CT-17for PC remote control (* Depending on version)

•Rear View

Digital voice recorder

ties From The 756PROII

Crystal oscillator

Speech compressor ONSpeech compressor OFF

2.5ms/Div

100W

Audio output comparison

NR OFF NR ON

• Frequency coverage : USA version

Rx 0.030– 60.000MHz*1

Tx 1.800– 1.999MHz 3.500– 3.999MHz5.3305, 5.3465, 5.3665, 5.3715, 5.4035MHz*2

7.000– 7.300MHz 10.100–10.150MHz14.000– 14.350MHz 18.068–18.168MHz 21.000– 21.450MHz 24.890–24.990MHz28.000– 29.700MHz 50.000–54.000MHz

Europe versionRx 0.030– 60.000MHz*1

Tx 1.810– 1.999MHz 3.500– 3.800MHz7.000– 7.100MHz 10.100–10.150MHz

14.000– 14.350MHz 18.068–18.168MHz21.000– 21.450MHz 24.890–24.990MHz28.000– 29.700MHz 50.000–52.000MHz

*1 Some freq. bands are not guaranteed. *2 USB mode only• Mode : USB, LSB, CW, RTTY, AM, FM• Number of memory Ch. : 101 (99 regular, 2 scan edges)• Antenna connector : SO-239×2 and phono [RCA; (50Ω)]• Temperature range : –10˚C to +50˚C; +14˚F to +122˚F• Frequency stability : Less than ±0.5ppm (1 min. after power

ON; 0˚C to 50˚C; +32˚F to +122˚F)• Frequency resolution : 1Hz• Power supply requirement : 13.8V DC ±15% (negative ground)• Power consumption : Tx Max. power 23A

Rx Standby 3.0A (typ.)Max. audio 3.5A (typ.)

• Dimensions : 340(W)×111(H)×285(D) mm;(projections not included) 133⁄8(W)×43⁄8(H)×117⁄32(D) in

• Weight (approx.) : 9.6kg; 21lb 1oz

• Output power : SSB, CW, RTTY, FM 5–100W(continuously adjustable) AM 5–40W

• Modulation system : SSB DPSN modulationAM Digital low power modulationFM Digital phase modulation

• Spurious emission : Less than –50dB (HF bands)Less than –60dB (50MHz band)

• Carrier suppression : More than 40dB• Unwanted sideband suppression:

More than 55dB• Microphone connector : 8-pin connector (600Ω)

• Receive system : Triple conversion superheterodynesystem

• Intermediate frequencies : 1st 64.455MHz (for all modes)2nd 455kHz (for all modes)3rd 36kHz (for all modes)

• Sensitivity (typical) :

10dB S/N for SSB, CW, RTTY and AM, 12dB SINAD for FM*1Pre-amp 1 is ON, *2Pre-amp 2 is ON

• Squelch sensitivity (Pre-amp: OFF):SSB, CW, RTTY Less than 5.6µVFM Less than 1µV

• Selectivity (representative value): SSB, RTTY More than 2.4kHz/–6dB(BW: 2.4kHz) Less than 3.2kHz/–40dB

Less than 3.6kHz/–60dBLess than 4.3kHz/–80dB

CW (BW: 500Hz) More than 500Hz/–6dBLess than 700Hz/–60dB

AM (BW: 6kHz) More than 6.0kHz/–6dBLess than 15.0kHz/–60dB

FM (BW: 15kHz) More than 12.0kHz/–6dBLess than 20.0kHz/–60dB

• Spurious and image : More than 70dBrejection ratio (except IF through on 50MHz band)

• AF output power : More than 2.0W at 10% distortion(at 13.8V DC) with an 8Ω load

• RIT variable range : ±9.999kHz• PHONES connector : 2-pin connector 6.35 (d) mm (1⁄4″)• EXT SP connector : 2-pin connector 3.5 (d) mm (1⁄4″)/8Ω

• Matching impedance range:HF bands 16.7–150Ω unbalanced*1

50MHz band 20–125Ω unbalanced*2

*1Less than VSWR 3:1; *2Less than VSWR 2.5:1• Min. operating input power: 8 W• Tuning accuracy : VSWR 1.5:1 or less

(SWR after the motor has stopped)• Insertion loss : Less than 1.0dB (after tuning)

SPECIFICATIONS

1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan Phone: +81 (06) 6793 5302 Fax: +81 (06) 6793 0013 Count on us!URL: http://www.icom.co.jp/world/index.html

Printed in Japan

2380 116th Avenue NE, Bellevue, WA 98004, U.S.A.Phone : +1 (425) 454-8155Fax : +1 (425) 454-1509E-mail : sales@icomamerica.comURL : http://www.icomamerica.com

Communication EquipmentHimmelgeister Str. 100, D-40225 Düsseldorf, GermanyPhone : +49 (0211) 346047Fax : +49 (0211) 333639E-mail : info@icomeurope.comURL : http://www.icomeurope.com

A.B.N. 88 006 092 575Unit 1 / 103 Garden Road,Clayton VIC 3168 AustraliaPhone : +61 (03) 9549 7500Fax : +61 (03) 9549 7505 E-mail : sales@icom.net.auURL : http://www.icom.net.au

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.Phone : +44 (01227) 741741Fax : +44 (01227) 741742E-mail : info@icomuk.co.ukURL : http://www.icomuk.co.uk

Zac de la Plaine, 1, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, FrancePhone : +33 (5) 61 36 03 03Fax : +33 (5) 61 36 03 00E-mail : icom@icom-france.comURL : http://www.icom-france.com

Crta. de Gracia a Manresa Km. 14,75008190 Sant Cugat del Valles Barcelona, SpainPhone : +34 (93) 590 26 70Fax : +34 (93) 589 04 46E-mail : icom@icomspain.comURL : http://www.icomspain.com

146A Harris Road, East Tamaki, Auckland, New ZealandPhone : +64 (09) 274 4062Fax : +64 (09) 274 4708E-mail : inquiries@icom.co.nzURL : http://www.icom.co.nz

Glenwood Centre #150-6165 Highway 17, Delta, B.C., V4K 5B8, CanadaPhone : +1 (604) 952-4266Fax : +1 (604) 952-0090E-mail : info@icomcanada.comURL : http://www.icomcanada.com

Your local distributor/dealer:6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C.Phone : +886 (02) 2559 1899Fax : +886 (02) 2559 1874E-mail : sales@asia-icom.comURL : http://www.asia-icom.com

10C07, Long Silver Mansion, No.88, Yong DingRoad, Haidian District, Beijing, 100039, ChinaPhone : +86 (010) 5889 5391/5392/5393Fax : +86 (010) 5889 5395E-mail : bjicom@bjicom.comURL : http://www.bjicom.com

Sopot, 3 maja 54, PolandPhone : +48 (58) 550 7135Fax : +48 (58) 551 0484E-mail : icompolska@icompolska.com.plURL : http://www.icompolska.com.pl

JP98/14190QA TW03/00288EM

Icom Inc. (Japan), is an ISO 9001 and ISO 14001 certification acquired company. 04WS014B* © 2004–2005 Icom Inc.

HF/50MHz ALL MODE TRANSCEIVER

GENERAL

OPTIONS

RECEIVER

TRANSMITTER

AH-4 HF+50MHz AUTOMATIC AN-TENNA TUNER

Covers 3.5–54MHz with a 7m (23 ft) orlonger wire antenna.

AH-2b ANTENNA ELEMENTA 2.5m long antenna element for mobileoperation with the AH-4. All amateur bandsbetween 7–54 MHz can be matched.

CT-17 CI-V LEVEL CONVERTERFor remote transceiver control using a PCequipped with an RS-232C port. You canchange frequencies, operating mode, etc.

UT-102 VOICE SYNTHESIZER UNITAnnounces operating frequency and modein English.

SM-20 DESKTOP MICROPHONEUnidirectional, electret microphone for basestation operation. [UP/DOWN] switchesand a low cut function are available.

HM-36 HAND MICROPHONESame as supplied.

ANTENNA TUNER

Supplied accessories:• Hand microphone • DC power cable • Spare fuses • CW key plug

SP-23 EXTERNAL SPEAKER4 audio filters; headphone jack.Input impedance: 8ΩMax. input power: 5W

PS-125 DC POWER SUPPLYStyle and size are matched to the IC-756PROIII.13.8V DC, 25A max.

All stated specifications are subject to change without notice or obligation.

Frequency SSB, CW, RTTY AM FMRange (MHz) (at 2.4kHz BW) (at 6kHz BW) (at 15kHz BW)

0.50–1.799 — 13µV —1.80–27.99 0.16µV*1 2µV*1 —28.0–29.99 0.16µV*1 2µV*1 0.5µV*1

50.0–54.0 0.13µV*2 1µV*2 0.32µV*2

IC-PW1/IC-PW1EURO HF+50MHz 1kW LINEAR AMPLIFIERCovers all HF and 50MHz bands, provides clean, stable 1kW output. Automatic antennatuner and compact detachable controller are standard. 2 exciter inputs are available.

The LCD display may have cosmetic imperfections that appear as tiny spots. This is not a malfunction or defect, but a normal characteristic of LCD displays.