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Icom IC-9100

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Icom IC-9100

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Quick Overview

H.F. VHF/UHF All Mode Base


Double conversion superheterodyne

Icom's basic idea about the best receiver circuit is to reproduce high fidelity audio without internal distortion. Our answer to achieve this goal is to adopt a double conversion superheterodyne system*. The double conversion system simplifies the electronic circuitry and reduces the number of components which cause internal distortion. The digital signal processing (DSP) technologies and image rejection mixer make it possible to adopt this system

Independent dual receivers

As seen in the above figure, the IC-9100 has 3 independent receiver circuits from the antenna connector to the second IF mixer (image rejection mixer). One each for HF/50MHz, 144MHz, 430/440MHz bands. See the table below for simultaneous receive pairs.

32-bit floating point DSP & 24-bit AD/DA converters

 The heart of the IC-9100 is the proven combination of the 32-bit floating point DSP and 24-bit AD/DA converters. This powerful combination supports many digital processing features.

AGC loop management

Digital IF filters, manual notch filter and other digital functions are incorporated in the AGC loop management controlled by the DSP unit. The AGC effectively works for the desired signal and rejects blocking by strong adjacent signals out of the filter passband. The AGC time constant presets (slow, medium and fast) give the flexibility and speed needed for working pile-ups.

Digital IF filter

The IC-9100 DSP allows you to “build your own” digital IF filter. You can quickly choose bandwidth, shape factor, and center frequency, so that you can work that rare DX station. Three filter memories allow you to change filter settings instantly, a great help during contesting or other tough conditions.

Digital twin PBT and IF shift

 After “building your own” digital IF filter, you can use the digital twin Passband Tuning (PBT) to shift and narrow the IF passband until the interference is gone and you can clearly hear that weak signal.

Noise reduction

The 16-step variable noise reduction can significantly enhance the receiver's signal-to-noise ratio, giving you a clean, clear audio signal that may make the difference between making the contact or not.

Noise blanker

The digital noise blanker reduces interference from pulse-type noise such as engine ignition. The noise blanker allows you to change the threshold level as well as blank duration parameter and attenuation level.

RF speech compressor

The digital RF speech compressor boosts average talk power, improving signal strength and readability in SSB mode. It is useful for for breaking through the noise and complete the QSO.

Adjustable transmit bandwidth

The transmit bandwidth is selectable from 100, 200, 300, 500Hz at the low-pass edge, and 2500, 2700, 2800, 2900Hz at the high-pass edge, respectively. Three types of high and low combinations can be stored in the memory as favorite settings.

Three first IF filters (3/6/15kHz) for HF/50MHz band

 The IC-9100 comes with a built-in 15kHz 1st IF filter and can accept up to two optional filters (3kHz FL-431 and 6kHz FL-430). By changing the first IF filter width according to the operating mode, the desired signal is protected from adjacent inband signals at the later stages for better receiver performance.

RTTY demodulator and decoder

The built-in RTTY demodulator and decoder allow you to instantly read an RTTY message on the display. No external units or PC required. The built-in tuning indicator visually helps in critical tuning.

Ample CW functions

All of the following CW capabilities are included in the IC-9100:

  • 4 channels of keyer with 70 characters of memory per channel
  • Multi-function electronic keyer with adjustable keying speed from 6-48 wpm, dot-dash ratio from 1:1:2.8 to 1:1:4.5 and paddle polarity
  • Bug keyer and full break-in function

Built-in Antenna Tuner for HF/50MHz band

 The internal antenna tuner automatically tunes for low SWR in the HF and 50MHz bands. Once you transmit on a frequency, the tuner can instantly retune the frequency using its built-in memory.

Manual notch filter and auto notch filter

 The manual notch filter controlled by the DSP has extremely sharp characteristics and provides more than 70dB of attenuation. It eliminates persistent beat tones without affecting the AGC loop function. The automatic notch filter tracks and eliminates two or more interfering signals, such as beat signals and carriers or tones from digital signals.

Other HF/50MHz features

  • Two preamplifier types for HF/50MHz bands:
    Preamp 1: Increases low level signal improving intermodulation,
    Preamp 2: High gain preamplifier
  • Triple band stacking register
  • Quick split and frequency lock functions
  • RIT and ⊿Tx variable up to ±9.999kHz
  • SSB/CW synchronous tuning automatically shifts the carrier point when switching between CW and LSB/USB modes
  • AH-4 control circuit

HF to UHF common features

  • Built-in voice synthesizer announces operating frequency, mode and S-meter level
  • User programmable band edge beep (Can be disabled)
  • Microphone equalizer and adjustable transmit bandwidth
  • 20dB built-in attenuator
  • ±0.5ppm high frequency stability
  • Audio equalizer function
  • 1Hz pitch tuning and display
  • Automatic tuning steps
  • Program, memory, select memory, mode select and ⊿f scanning
  • Up to 424 memory channels*
  • Headphone separate function (left for main audio, right for sub audio)

* With optional UX-9100.

Large, Multi-function 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) for both the main and sub bands vertically. The dot-matrix portion of the LCD shows the following items:

  • Channel name
  • Function key assignment
  • Band scope
  • RTTY decoder screen
  • Memory keyer contents
  • Graphical SWR scale
  • D-STAR call sign, message, DR list
  • GPS position information.

USB connector for PC control

The IC-9100 has a standard type B USB connector and can be connected to a PC. Modulation input, audio output, RTTY demodulator output and CI-V command can be controlled via the USB cable. Also, the conventional CI-V remote control jack is built in to the IC-9100.

Other VHF/UHF features

  • VSC (Voice Squelch Control) function
  • AFC function (FM/DV mode)
  • CTCSS and DTCS tone encoder and decoder
  • 9600bps data socket
  • Automatic repeater function* and one-touch repeater function

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