ICOM IC-7400

HF/50/144MHz All mode Transceiver

32-bit DSP Technology Takes You Even Higher - To144MHz!

ICOM IC-7400

ICOM has taken the DSP technology recently inytroduced in the IC-756PROII, and created awhole new radio category. The IC-7400 incorporates the 32-bit DSP features to create some of the most flexible signal enhancing, and interference reduction ever offered in this type of radio. So follow along as we describe the latest features now available in the IC-7400.

Starting with the 32-bit DSP processor and 24-bit AD/DA converter, ICOM enables the ham radio operator to create the listening environment that best suites the current band and operating conditions.

All Mode Digital Modulation and Demodulation.

Let’s start with the modulation and demodulation of the signals. For signal purity and clarity, an all mode digital PSN ( Phase Shift Network) system has been incoporated into the DSP system. For transmit, this greatly reduces the intermodulation distortion, producing the highest quality transmit audio. While the PSN seperates the signal from noise by phasing out noise and other unwanted signals

IF Filter Shapes.

Next is the IF filters. You will never have to purchase optional filters, with over 51 different filter width, just dial in the width you want. Then select whether you want a sharp or soft filter shape for SSB and CW modes. For the digital operators, your digital filters are seperate from the SSB filters

Digital Twin PBT.

Only Icom brings you Twin Passband tuning! Tailor your IF passband with the Twin PBT by electronically shifting the upper and lower IF passbands. Depending on the use of the concentric knobs, you can either narrow the IF passband, or shift the entire passband to eliminate interfering signals.

Manual Notch Filter.

Interference management is not a problem with the Manual Notch filter. With it’s incredible 70dB attenuation, the manual notch can eliminate a wide variety of QRM. The Automatic Notch Filter can track two or more interfering signals like Heterodynes and “Key uppers”!

Digital Noise Reduction.

By digitally manipulating the incomming signal, the DSP is able to reduce various types of noise and enhances the receive signal components. Providing an outstanding signal to noise ratio to give clean, clear audio.

AGC Loop Management.

Another first in this class of transceiver, the IC-7400 incorporates a multiple AGC loop management system, which uses the DSP filtering to remove unwanted signals is removed using the DSP, the AGC will not be affected. In other words, “ No more pumping of the AGC!” Also, the AGC is independently controllable for mode and the time settings. ( Off, 0.1-6.0 or 8.0 sec.)

Microphone Equalizer.

Bring Hi-Fidelity to the amateur airwaves. The Microphone Equalizer will change your RST from “ 59” to “Great Audio” and “Nice Signal”. Adjust your audio for Bass and Treble characteristics to total 121 levels for all voice operation. The transmit filter width in SSB mode is selectable from 2.8/2.4/2.2kHz. The Rx tone control is also an Equalizer for the received audio. As with the transmit audio, select the amount of Bass and Treble you need for the audio clarity you want.

Digital RF Speech Compressor.

Need more punch in your signal; the ICOM Digital RF Speech Compressor gives you all you need without fuss and noise. Great for breaking through QRM.

HF + 50MHz + 144MHz All Band Coverage Covering.

All HF bands as well as 50MHz and 144MHz, the IC-7400 all mode transceiver also includes a general coverage receiver from 0.03 - 60MHz* and 144 - 146MHz with full IF DSP capability.

* Some frequency bands are not guaranteed.

Continuous Duty at 100W.

The bipolar 2SC2694’s are used to provide a clean 100 watts of output power for SSB, CW, RTTY and FM modes. ( 40W in AM). The die-case aluminum chassis and the riable speed cooling fan enables the IC-7400 to transmit full power all the time*; the perfect companion for those digital mode contests. * On a 50Ω load at room temperature.

Large, Multi-fuction LCD.

The large multi-function LCD displays frequency, 9-character channel name, channel number, multi functional meter 
( includes S-meter, RF output, SWR and ALC level) and other operting status. 
The dot-matrix portion of the LCD shows following items:
Channel name
Function key assignment
Band Scope
RTTY decoder screen
Memory keyercontents
Graphical SWR scale 

RTTY Demodulator and Decoder.

The built-in RTTY demodulator and decoder reads baudot RTTY signals on the screen without turning on your PC or other gear. The RTTY tuning indicator helps critical tuning. The Twin Peak filter removes interfering QRM giving you a moreaccurate decoded message.

Ample CW Functions.

Multi function electronic keyer, variable dot/dash ratio ( 2.8:1 to 4.5:1) and key speed ( 6-60 WPM), paddle polarity, bug key etc. CW pitch is adjustable (300 to 900Hz). Full break-in capability. Double key jacks- one each for front and rear panel.

Memory Keyer.

4 channel memory keyer stores up to 50 characters withserial contest number auto-counter, morse cut number and auto repeat function. In addition, a user supplied external keypad* controls the memory keyer from your finger tips.
* Not supplied by ICOM

Built-in Antenna Tuner.

The internal antenna tuner matches the HF and 50 MHz bands automatically. After operating on a band for the first time, the tuner memorizes the selected antenna and preset point providing for very high speed tuning. 2 antenna connctors for HF and 50MHz bands and 1 for 144MHz band is equipped on the IC-7400

SSB/CW Synchronous Tuning.

You no longer have to worry about losing a CW signal while tuning with SSB mode. 
With the SSB/CW synchronous tuning, the frequency automatically shifts when you change modes.

Voice Squelch Control (VSC) function.

The Voice Squelch Control function opens the squelch only when receiving a modulated voice signal.

Other Outstanding Features.

•Triple band stacking register
•2 types of preamplifier ( Regular and Hi-gain) for HF and 50MHz, 1 for 144MHz band
•20 dB RF attenuator
•Level adjustable noise blanker ( 101 steps)
•BPF function below 500Hz band width in SSB mode
•¼ speed dial tuning function for SSB-data, CW and RTTY modes
•108 selectable DTCS and 50 selectable CTCSS with encoder/decoder
•1750Hz tone encoder
•Optional high stability crystal unit, CR-338
•Up to 10 memo-pads temporarily store frequencies and modes
•Quick split function with split lock function
•+/- 9.99kHz RIT and ∆TX
•Band edge beep
•CI-V capability for PC Control
•VOX
And more...