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ICOM IC-756PRO
Features and Specifications

This information is subject to change without notice or obligation


IC-756PRO FEATURES

    A newly designed 32-bit floating point DSP This refined DSP provides noise reduction and auto notch, plus the following new features:
    • AGC loop operation - IF filter and notch circuits are included into DSP loop, which allows wider dynamic range.
    • Digital IF filter - with 51 selectable bandwidths. In order to apply PSK-31 and other digital operation modes, it is possible to make the bandwidth for SSB filter to 50Hz.
    • Low distortion, RF type speech compressor - Transmit bandwidth is selectable: 2.0kHz, 2.6kHz, and 2.9kHz.
    • Built-in RTTY demodulator / dual peak APF. - An RTTY (baudot) demodulator and decoder circuit are built-in. 2 peak frequencies can be selected by setting the shift width for RTTY operation. The receive character for RTTY appears on the screen.
    • Microphone equalizer - A total of 121 AF characteristics are selectable
    • Manual notch function - attenuation level: 70 dB
Noise reduction function - variable rejection level
  • TFT 5 inch color LCD - A first in HF transceivers! Provides a wider viewing angle and increased display of information. The following items are displayed on the LCD:
    • Dual frequency display
    • Memory frequency and memory name
    • IF filter bandwidth
    • RTTY tuning indicator / received character
    • Real-time spectrum scope
    • Voice memory / CW memory keyer contents
  • 8 channel digital voice memory function - up to 15 seconds, 4 channels for transmit and 4 channels for receive
  • Digital twin pass band tuning (PBT) - digitally narrows the passband width at the DSP to efficiently eliminate interfering signals. Operating the PBT at the DSP allows sharper, superior passband width characteristics for removal of unwanted signals.
  • Real-time spectrum scope - selectable sweep range: 12.5 kHz, 25kHz, 50kHz, 100kHz
  • Dual watch - the IC-756PRO can receive 2 signals on the same frequency band simultaneously. Conveniently monitor a DX station while operating on another frequency.
  • Triple band stacking register
  • Built-in memory keyer
  • Built-in automatic antenna tuner - covers 50MHz
  • Built-in Electronic keyer

 


 

IC-756PRO SPECIFICATIONS            

GENERAL

  • RX: 0.5 ~ 29.995MHz, 50 ~ 54MHz (working range: 0.3 ~ 60MHz)
  • TX: 1.9, 3.5, 7, 10, 14, 18, 21, 24, 28 and 50 MHz amateur band
  • Mode: USB, LSB, CW, RTTY, AM, FM
  • Frequency stability: within 1 ppm (60 minutes after power on), 7 ppm (within first 60 minutes after power on)
  • Number of memory channels: 101
  • Frequency resolution: 1Hz
  • Current drain: DC13.8V 15%, Max 23A
  • Dimensions: 340(W) x 111(H) x 285(D) mm; 13.37(W) x 4.37(H) x 11.22(D) in (projections not included)
  • Weight: 9.6 kg; 21.2 lb.


TRANSMIT

  • Output power: SSB/CW/RTTY/FM: 5 ~ 100 W variable, AM: 5 ~ 40 W variable
  • Modulation system:
    SSB: PSN modulation
    AM: Digital low power modulation
    FM: Digital phase modulation
  • Spurious emissions: less than -50 dB (HF), -60 dB (50MHz)
  • Carrier supression: more than 40 dB
  • Unwanted sideband supression: more than 55 dB


RECEIVE

  • Receive system: Triple superheterodyne
  • Sensitivity:
SSB, CW, RTTY (10 dB S/N): -0.16 dB 1.80-29.99 MHz preamp 1 on
  -0.18 dB 50.0-54.0 MHz preamp 2 on
AM (10 dB S/N): +22 0.5-1.799 MHz preamp off
  +6 1.80-29.99 MHz preamp 1 on
  +0 28.0-29.99 MHz preamp 2 on
FM (12 dB SINAD): -6 28.0-29.99 MHz preamp 1 on
  -10 50.0-54.0 MHz preamp 2 on
  • Selectivity (typical):
SSB (2.4kHz): 2.48kHz/-6 dB 2.7kHz/-60 dB
CW (500Hz): 510Hz/-6 dB 650Hz/-60 dB
RTTY (350Hz): 380Hz/-6 dB 510Hz/-60 dB
AM (6kHz): 6.5kHz/-6 dB 14.7kHz/-60 dB
FM (15kHz): 14.4kHz/-6 dB 18.8kHz/-60 dB
  • AF output: More than 2.0 W with an 8 ohm load


IC-775DSP SPECIFICATIONS

GENERAL

  • Frequency Coverage:
    • Receive
      100khz-29.990 MHz
    • Transmit
      1,800-1.999999 MHz*1
      3,500-3.999999 MHz*2
      7,000-7,3000 MHz*3
      10,100-10,150 MHz
      14,000-14,350 MHz
      18,068-18,168 MHz
      21,000-21,450 MHz
      24,890-24-990 MHz
      28,000-29,700 MHz
       
      *11,830-1,850 for Spain version; 1,810-1,850 for France version;
         1,815-1,835/1,850-1,890 for Germany version
      *23,500-3,800 for Spain, France and Germany versions
      *37,000-7,100 for Spain, France and Germany versions
  • Mode: SSB, CW, AM, FM, RTTY
  • Number of memory channels: 101(99 regular, 2 scan edges)
  • Antenna impedance : 50 ohms nominal
  • Usable temperature range : -10C to 60C (14F to140F)
  • Frequency stability: Less than 200 Hz from 1 min. to 60 min. after power ON. After that rate of stability less than 30 Hz/hr. at + 25C (+77F). Temperature fluctuations OC to +50C (+32F to + 122F) less than 350 Hz
  • Power supply requirement: 120 V Type 85-135 V AC 230 V Type 187-265 V AC (switchable)
  • Power consumption:
    • Transmit
      max. power 760 VA
    • Receive
      squelched 140 VA
      max. audio 150 VA
  • Dimensions:
    • 424(W) X 150(H) X 390(D) mm
    • 16 11/16(W) X 5 29/32(H) X 15 11/32(D) in
  • Weight: IC-775DSP 16.7 kg (36.8 lb), IC-775 16.5 kg (36.4 lb)


Transmitter

  • Output power: SSB/SW/RTTY/FM 5-200 W
                          AM 5-50 W
                          (continuously adjustable)
  • Spurious emissions : Less than -60 dB
  • Carrier suppression : More than 40 dB
  • Unwanted sideband suppression : More than 55 dB
  • Microphone impedance : 600 ohms


Receiver

  • Receive system
    • ;SSB, CW, RTTY, AM: Quadruple conversion superheterodyne
    • FM: Triple conversion superheterodyne
  • Intermediate frequencies

    MODE SSB CW,RTTY AM FM
    1st 69.0115 MHz 69.0106 MHz 69.0100 MHz 69.0100 MHz
    2nd 9.0115 MHz 9.0106 MHz 9.0100 MHz 9.0100 MHz
    3rd 455 kHz 455 kHz 455 kHz 455 kHz
    4th 10.695 MHz 10.695 MHz 10.695 MHz -


  • Sensitivity (Preamp 1 On)

    SSB, CW, RTTY 100 - 500 kHz Less than 2.0 V
    (10 dB S/N) 1.8 - 29.9 MHz Less than 0.16 V
    AM (10 dB S/N) 0.5 - 1.8 MHz Less than 13.0 V
      1.8-29.99 MHz Less than 2.0 V
    FM (12 dB SINAD) 28-29.99 MHz Less than 0.5 V


  • Squelch Sensitivity (Preamp 1 ON)

    SSB, CW, RTTY, AM Less than 3 2 V at threshold
    FM Less than 0 32 V at threshold


  • Selectivity (normal filter selection)

    SSB More than 2 4 kHz/- 6 dB
      Less than 4 0 kHz/ -60 dB
    CW, RTTY More than 500 Hz/-6 dB
      Less than 1 0 kHz/-60 dB
    AM More than 2 4 kHz/-6 dB
      Less than 4 0 kHz/-60 dB
    FM More than 15.0 kHz/-6 dB
      Less than 30.0 kHz/-60 dB


  • Spurious and image rejection ratio: More than 70 dB
  • Audio output power: More than 2 6 W at 10% distortion with an 8-ohm load
  • RIT/TX (variable range) 9.999 kHz


ANTENNA TUNER

  • Matching impedance range : 16.7 - 150 ohms unbalanced (Less than VSWR 3 : 1)
  • Minimum operating input power: 8 W
  • Tuning accuracy : VSWR 1.5 : 1 or less
  • Insertion loss : Less than 1.0 dB (after tuning)

 

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

 


OPTIONS

  • IC-4KL HF 1 kW LINEAR AMPLIFIER This is an all solid-state, full-duty 1 kW linear amplifier including an automatic antenna tuner. The IC-4KL is fully controllable from the IC-775/DSP. No need to tune and no need to switch the operating band. Full break-in (QSK) operation is possible. The amplifier/power supply unit and the remote control unit are separated.
  • IC-2KL HF 500 W LINEAR AMPLIFIER This is an all solid-state 500 W linear amplifier. The power amplifier unit can be separately set-up from the power supply unit.
  • IC-AT500 500 W automatic antenna tuner. Best match for the IC-775/DSP with the IC-2KL. Includes an automatic antenna selector for 4 separate antennas.
  • EX-627 AUTOMATIC ANTENNA SELECTOR Automatically selects the antenna for the selected ham band. Manual selection is also possible. Max. input power: 1000 W PEP
  • MB-19 Mounting handles for 19-inch rack.
  • SP-20 4 Audio filters; headphone jack; can connect to 2 transceivers; style/size matched to the IC-775/DSP. Input impedance: 8ohms. Max. input power: 5 W.
  • SP-21 Designed for base station operation. Input impedance: 8ohms. Max. input power: 5 W.
  • SM-20 Unidirectional, electret microphone for base station operation. Includes (UP)/(DOWN) switches and a low cut function.
  • SM-8 Electret condenser-type desktop microphone including 2 connection cables for simultaneous connection of 2 transceivers. (UP)/(DOWN) switches are included.
  • CT-16 Easy tuning when connecting another Icom HF or V/Uhf transceiver for instant satellite communications.
  • CT-17 For remote transceiver control using a personal computer equipped with an RS-232C port. You can change frequencies, operating mode, memory channels, etc.
  • HM-36 Hand microphone equipped with (UP)/(DOWN) switches.
  • CR-282 Contains a temperature-compensating oven heater and crystal unit for improved frequency stability. Frequency stability: 0.5 ppm
  • UT-66 Announces operating frequency and mode.
  • UI-100 Enables several digital functions, such as noise reduction, for the IC-775 (non-DSP type). Already installed in the IC-775DSP.
  • FL-101, FL-102, FL-223 9 MHz FILTERS Have good shape factor and provide you with better reception.
    FL-101: 250 Hz/-6dB (CW nar.)
    FL-102: 6.0 kHZ/-6dB (SSB wide/AM med./FM nar.)
    FL-223: 1.9 kHz/-6 dB (SSB nar.)
  • FL-53A and FL-222455 kHz FILTERS Have good shape factor and provide you with better reception.
    FL-53A: 250 Hz/-6 dB (CW nar.)
    FL-222: 1.9 kHz/-6 dB (SSB nar.)


IC-781 SPECIFICATIONS

GENERAL

  • Frequency Coverage:
    Receive: 0.1 ~ 30.0 MHz
    guaranteed range 500 kHz ~ 30 MHz
    Transmit:
    160-m band 1.8 ~ 2.0 MHz
    80-m band 3.5 ~ 4.0 MHz
    40-m band 7.0 ~ 7.3 MHz
    30-m band 10.1 ~ 10.15 MHz
    20-m band 14.0 ~ 14.35 MHz
    17-m band 18.068 ~ 18.168 MHz
    15-m band 21.0 ~ 21.45 MHz
    12-m band 24.89 ~ 24.99 MHz
    10-m band 28.0 ~ 29.7 MHz
  • Modes: A3J (SSB),A1 (CW),F3 (FM), F1 (RTTY), A3 (AM)
  • Frequency step: 10 Hz (with [TS] OFF); 1 Hz (with [TS] ON)
  • Antenna impedance (with [TUNER] OFF): 50 ohms (unbalanced)
  • Power Supply Requirement: 100 ~ 120 V AC (U.S.A. version); 220 ~ 240 V AC (Australia,Europe,France versions)
  • Power consumption:
    Receiving maximum. audio: 150 VA; standby: 140 VA
    Transmitting maximum.: 760 VA; minimum: 325 VA
  • Usable Temperature Range: -10C to +60C; +14F to +140F
  • Frequency stability: 15 Hz (-10C to +60C; +14F to +140F)
  • Dimensions: 425(W) x 149(H) x 411(D) mm, 16.7(W) x 5.9(H) x 16.2(D) in
  • Weight: 23 kg; 50.7 lb.


Transmitter

  • Maximum output power:
    SSB: 150 W PEP
    CW,RTTY,FM: 150 W
    AM: 75 W
  • Modulation system:
    SSB: balanced modulation
    FM,RTTY: reactance frequency modulation
    AM: low level modulation
  • Maximum frequency deviation: 5 kHz
  • RTTY shift width: 170 Hz, 425 Hz, 850 Hz selectable
  • Spurious emissions: Less than -60 dB
  • Carrier supression: Less than -40 dB
  • Unwanted sideband: Less than -55 dB (with 1 kHz modulation)
  • Microphone impedance: 600 ohms


Receiver

  • Receive system:
    SSB,CW,AM,RTTY: Quadruple-conversion superheterodyne
    FM: Triple-conversion superheterdyne
  • Intermediate frequencies:
    Mode 1st 2nd 3rd 4th
    SSB 46.5115 MHz 9.0115 MHz 455 kHz 10.6950
    CW,RTTY 46.5106 MHz 9.0106 MHz 455 kHz 10.6950
    AM 46.5100 MHz 9.0100 MHz 455 kHz 10.6950 MHz
    FM 46.5100 MHz 9.0100 MHz 455 kHz
  • Sensitivity (preamp ON):
    SSB, CW, RTTY (for 10 dB S/N):
    0.1 ~ 0.5 MHz Less than 0.5 V
    0.5 ~ 1.8 MHz Less than 1.0 V
    1.8 ~ 30 MHz Less than 0.16 V
    AM (for 10 dB S/N):
    0.1 ~ 0.5 MHz Less than 3.2 V
    0.5 ~ 1.8 MHz Less than 6.3 V
    1.8 ~ 30.0 MHz Less than 1.0 V
    FM (for 12 dB SINAD):
    28 ~ 30.0 MHz Less than 0.23 V
  • FM squelch sensitivity: 28 ~ 30 MHz Less than 0.23 V
  • Selectivity:
    SSB, CW-W, RTTY-W, AM-N: More than 2.4 kHz/-6 dB ; Less than 3.8 kHz/-60 dB
    CW-N, RTTY-N (with [CW250Hz] OFF): More than 500 kHz/-6 dB; Less than 1 kHz/-60 dB
    CW-N, RTTY-N (with [CW250Hz] ON): More than 250 kHz/-6 dB; Less than 800 kHz/-60 dB
    AM-W: More than 6.0 kHz/-6 dB ; Less than 15.0 kHz/-60 dB
    FM: More than 15.0 kHz/-6 dB ; Less than 30.0 kHz/-50 dB
  • Spurious and image rejection ratio:
    Image: Less than -80 dB
    IF: Less than -70 dB
  • Audio output: More than 2.6 W with an 8 ohm load at 10% distortion
  • Notch filter attenuation: More than 45 dB
  • RIT variable range: 9.99 kHz


Antenna Tuner

  • Output matching range: 16.7 ~150 ohms unbalanced
  • Minimum input power: 15 W
  • Auto tuning accuracy: VSWR less than 1.2:1
  • Insertion loss: Less than 0.5 dB (after tuning)


CRT Display

  • Output level:
    Composite video signal: 1 Vp-p
    Video components: 0.7 Vp-p positive
    Synchronous components: 0.3 Vp-p negative
  • Output impedance: 75 ohms
  • Horizontal frequency: 15.75 kHz
  • Vertical fequency: 60 Hz

IC-781 OPTIONS

  • IC-4KL 1 kW HF LINEAR AMPLIFIER
  • IC-2KL 500 W HF LINEAR AMPLIFIER
  • IC-AT500 500 W AUTOMATIC ANTENNA TUNER
  • SP-20 EXTERNAL SPEAKER WITH AUDIO FILTERS (8 ohms/5 W)
  • SM-6 DESKTOP MICROPHONE
  • SM-8 DESKTOP MICROPHONE
  • SM-20 DESKTOP MICROPHONE
  • HM-12 HAND MICROPHONE (includes UP/DOWN switches)
  • UT-36 VOICE SYNTHESIZER UNIT
  • CT-16 SATELLITE INTERFACE UNIT
  • CT-17 CI-V LEVEL CONVERTER
  • EX-627 HF AUTOMATIC ANTENNA SELECTOR
  • FL-103 SSB WIDE FILTER (9.0115 MHz, 2.8 kHz/-6 dB)

 

 

                                                           


  

Copyright 2000  Whiskey Whiskey. All rights reserved.
Last updated: 09 March 2000 .