HF for the Next Millennium The DX advantage you’ve always wanted!

HF for the Next Millennium

The DX advantage you’ve always wanted!

DESIGN CONCEPT

• Create the “Ultimate HF Transceiver”

• Innovative Technology• Feature Set NEVER Available

Before

• High End Ergonomics • Affordable Pricing

Customer Requirements• Revolutionary DSP

Technology • Uncompromised

Receiver Performance• Unparalleled Transmit

Audio• Large, Easy to Read

Display• Compact Size

Customer Satisfaction

Quality Value

Performance

What’s NEW

• 32 Bit Floating Point DSP

• 24 Bit AD/DA Converter

• Digital IF Filtering

• 4.9” TFT Color LCD Display

• Digital Voice Recorder

• Improved Receiver Performance

• RTTY Decoder

Meeting the NeedsA newly designed 32 Bit Floating Point DSP unit was created for use in the IC-756PRO.

With the power of the 32 Bit Floating Point DSP, ICOM was able to move the DSP higher in the IF stages. At 36kHz, the IC-756PRO is a triple conversion receiver, with the 1st IF at 65.455MHz.

DSP Controlled AGC

24 BitAD/DA Converter

32 BitFloating Point

DSP

Digital IFFilters

RevolutionaryDSP

Meeting the Needs

SSB (2.4kHz) 2.4kHz –6dB

2.8kHz –60dB

CW (500Hz) 500Hz – 6dB700Hz –

60dB

RTTY (350Hz) 360Hz –6dB

650Hz –60dB

AM (6kHz) 6.0kHz – 6dB15kHz –

60dB

FM (15kHz) 12kHz – 6dB20kHz –

60dB

DSP Controlled AGC



DSP

Digital IFFilters

Digital IF filters provide IF shape factor that can not be match with crystal or mechanical filters for superior adjacent signal rejection.

RevolutionaryDSP

Meeting the Needs

Front panel, tunable digital IF filters give you an ultra-sharp pass band IF. The 32 Bit DSP along with the 24 Bit AD/DA Converter provides an ultra wide ADC dynamic range of 144dB.

DSP Controlled AGC



DSP

Digital IFFilters

RevolutionaryDSP

Meeting the Needs

Weak signal work is easier now with the help of the DSP controlled Multiple AGC Loops.

This system removes blocking by strong adjacent signals, with virtually no more pumping of the AGC.

Finally you have user selectable time constants for the three AGC presets. (Fast, Mid, and Slow.)

DSP Controlled AGC



DSP

Digital IFFilters

RevolutionaryDSP

Meeting the Needs

Digital Noise Reduction

AutomaticManual

Notch Filter

DPSNDigital

Phase Shift Network

Digital IFFilters

The IC-756PRO covers a wide frequency range, 30kHz to 60MHz.

The dynamic range of the receiver is 105dB with a high intercept point of +23dBm.

Icom’s original DDS (Direct Digital synthesizer) provides superior phase noise to improve dynamic range.

A high stability crystal oscillator, CR-338, is stock for the PLL Reference oscillator (± 0.5ppm 0-50C).

UncompromisedReceiver

Performance

Impressive Receiver

• Receiver Range: 0.03~60MHz

• Digital Demodulation for all Modes

• Dynamic Range of 105dB with a High Intercept Point of +23dB

• 3 Selectable AGC Speeds

Meeting the Needs


AutomaticManual

Notch Filter

DPSNDigital

Phase Shift Network

Digital IF Filters

31, 100Hz steps between the 3600-600Hz and 10, 50Hz steps between the 500-50Hz ranges, will allow the receive pass band to be tweaked for optimum performance.

No other radio gives you as wide of a range with visual indicators as the IC-756PRO


Performance

Meeting the Needs


AutomaticManual

Notch Filter

DPSNDigital

Phase Shift Network

Digital IFFilters

A Digital PSN (Phase Shift Network) is employed at the modulator/demodulator level. The result is high quality receive signals for all voice operations.

The new 32 Bit Floating Point DSP allows the IC-756PRO to have both a Manual and Automatic Notch Filter.

The Manual Notch achieves more than a 70dB attenuation, which is great to eliminate annoying tones the Automatic Notch Filter can not cover.


Performance

Meeting the Needs


AutomaticManual

Notch Filter

DPSNDigital

Phase Shift Network

Digital IFFilters

The new DSP used in the IC-756PRO digitally separates desired signal components from noise components.

Outstanding signal to noise ratio is achieved, providing clean, clear audio in SSB, easy to copy RTTY and crisp, clear SSTV reception.

In addition, the Digital Noise Reduction has a continuously adjustable noise suppression level.


Performance

Meeting the Needs

The NEW DSP used in the IC-756PRO offers transmit audio tailoring never available before as standard equipment.

Microphone Equalization, RF Speech compression, along with the Digital Phase Shift Network give a clean, low distortion signal.

Highly Stable Transmitter

DPSNDigital

Phase Shift Network

RF Speech Compressor

Microphone Equalizer

UnparalleledTransmit

Audio

Meeting the Needs


DPSNDigital

Phase Shift Network



The NEW microphone equalizer in the IC-756PRO gives you 121 audio variation properties, 11 in the high and 11 in the low sound ranges.

This allow you to find that perfect transmit signal you are looking for.


Audio

Meeting the Needs


DPSNDigital

Phase Shift Network



The IC-756PRO has truly drawn the line between previous models and their standard equipped processors.

The 32 bit capacity of the DSP allows the speech processor to compress the transmitter audio input. This increases the average output audio level.

Bottom line, average talk power is increased.


Audio

RF Compression Comparison

Meeting the Needs


DPSNDigital

Phase Shift Network



As with the receiver, the transmit audio passes through the Digital PSN (Phase Shift Network).

The SSB modulator uses the PSN modulator in the 32 Bit DSP. This creates a 10db improvement in the S/N ratio compared to previous models.

The result is a consistently reproducible, clear transmit audio for all voice operations.


Audio

Meeting the Needs


DPSNDigital

Phase Shift Network



The IC-756PRO has a newly adopted high rating power transistor (2SC5125 x 2) in the PA circuit.

With the die-cast aluminum frame and large cooling fan to help stabilize the PA circuit providing 100% full duty cycle operation at full power.


Audio

4.9” TFT Color LCD display

Wider Viewing Angle and Increased Information

• Real Time Spectrum Scope

• Memory or Memo-Pad List

• Set Mode Conditions

• Memory Keyer Contents

• Switch Labels

Multiple Screens (Basic Operation)

4 screen colors for desired operating

preferences

Preferred for low light operations Preferred for well lighted areas

Multiple FontsIf you don’t like a certain display font, you can

change it to one of the seven display fonts.

Display (Wide Mode)

If there is too much data or the display is not large enough, the IC-756PRO has a wide display mode which allows you to see the lower portion in a larger format.

Set Modes (Basic)

Operation settings are placed in a user friendly set mode menu. Using the soft keys, you can quickly change the most commonly used settings on the fly.

Set Mode (Audio Levels)

Transmit audio is as easy to set as selecting the proper control and rotating the tuning dial.

Spectrum Scope

Here is one of the beauties of the display. The spectrum scope can show active spectrum as well as display history with the max hold function.

Set Mode (Others)

Even the set items are in a user friendly menu.

Display Set Mode

Display Settings give you choices for Contrast, Brightness, Button Backlights, Display Type, Display Fonts, Memory Name, and Call Sign.

Memory Channel View

Memory Alphanumeric with readout of Frequency, Mode, Filter Selection, and Channel Number.

Set Mode (Filters CW)

CW filter selections as simple as 1, 2, 3. Select each filter setting by pushing the filter button. Then you can make changes on the fly with the Digital PBT. Also, the CW pitch changes the center frequency, which is shown on the display.

Set Mode (AGC)

If the AGC is too fast or too slow, a quick setting change can make it just right. Also, different settings for different modes eliminates adjustments when hopping around the band.

Set Mode (Filters SSB)

Several visual guides help see what is happening to your IF bandwidths. As with CW you can change the FIL1, FIL 2, and FIL 3 settings to what you want, then using the Digital Twin PBT can narrow or shift the IF bandwidth. It’s also great for teaching others in radio operation.

Filter Indicators

Filter indicators located at the top of the TFT display give you a quick look at the filter status. BW being Bandwidth and the SFT being Shift, you can see what changes are made with the Digital Twin PBT. You can also see what filter you have selected, and the mode you are using.

Smart Keys

ICOM Smart Key system changes with the mode and operations you use. No more guessing “what mode do I use with what key?”

Band Scope

The Spectrum Scope first came out on the IC-781, then the IC-756, and now on the NEW IC-756PRO. The selections are 25, 100, and 200kHz wide with the displayed frequency being the center point of the display. There is also Sub marker and TX marker along with a Hold function.

Band Scope (Attenuator)

What once took a S5 signal to see it on the scope is no longer the case. You can select from one of four attenuator levels.

10dB

20dB

30dB

Digital Voice Recorder

New to the ICOM HF product line is the Digital Voice Recorder. It’s

useful for both transmit and receive, with 4-15 second channels.

Dual Watch

True in-band dual receive is possible with the IC-756PRO Dual Watch Mode. Same Band and same Mode is required.

RTTY Decoder

Want to see if RTTY DX is coming in or just copy the ARRL Bulletins, without firing up the computer? The IC-756PRO RTTY Decoder is a nice little item. The IC-756PRO utilizes a Dual Automatic Peak filtering system along with a tuning indicator, making RTTY decoder tuning quite easy.

© 2000 Icom America, Inc. No Portion of this presentation may be altered without written permission of Icom America.

Documents

HF for the Next Millennium The DX advantage you’ve always wanted!