Icom IC-7700

Icom IC-7700

Icom IC-7700 110dB Dynamic Range and +40dBm 3rd Order Intercept Point (IP3)

The IP3 performance of a radio can be improved by sacrificing sensitivity, but Icom considers this a poor choice. To achieve REAL high-performance, Icom reviewed all of the analog receiver circuitry. Icom IC-7700 employs mechanical relay BPF switching, a digitally tuned pre-selector, and three Hi-spec 1st IF filters (roofing filter) in a Dynamic range characteristics (in 14MHz band) clean and simple double-conversion superheterodyne design. By balancing the analog and DSP functions, Icom IC-7700 provides superior sensitivity simultaneously with a superb dynamic range of 110dB, and +40 dBm IP3 (even in USB mode with 2.4 kHz filter bandwidth)..

Better Than +110dBm 2nd Order Intercept Point (IP2)

An IP2 point of more than +110 dBm* means the 2nd order distortion from strong broadcast stations will be completely eliminated. The endless pursuit of leading analog circuit engineering makes it possible to achieve this leading edge level of performance.
* Measurements were made using custom equipment, due to the limits of normal signal generators (SG) and duplexers to +85 dBm. The IP2 figure is a typical value.

Double Conversion Superheterodyne System

While multiple IF stages can become a source of distortion products and spurious responses, Icom IC-7700 utilizes Icom’s original image-rejection mixers in a simple double conversion superheterodyne. This reduces distortion and produces a much cleaner audio signal compared to triple or quadruple superheterodyne receivers.

High Specification Inband IMD

In-band IMD (Intermodulation Distortion) creates undesired spurious signals as a consequence of non-linear processing of multiple signals. All (2nd, 3rd or even higher) orders of IMD performance are superior in Icom IC-7700. The improvement will be especially evident in CW mode. You’ll notice the difference as you copy weak signals without internal distortion or noise.

Inband IMD Characteristics

 

Band Pass Filter

While some may lead you to believe that coils and capacitors are all created equal, at Icom we know design excellence. Rather than using switching diodes that can introduce distortion, the IC-7700 design utilizes high-grade mechanical relays along with large capacitors and toroidal coils; resistant to magnetic saturation, providing superior linearity, and greatly reducing distortion.

DIGI-SEL (Digital Pre-Selector)

The DIGI-SEL (digital pre-selector) is a very narrow, user adjustable, pass band filter designed to automatically track the operating frequency, attenuating interference from out-of-band signals. While the pre-selector’s pass-band remains centered on the operating frequency, on the fly adjustments are possible via front panel controls. The DIGI-SEL is especially useful for multi-transmitter operation and near strong broadcast stations by reducing the 2nd, 3rd, and even higher order IMD components from other stations.

Pre-Amplifiers

The Icom IC-7700 has a total of 4 pre-amplifiers, two for the HF bands and two for the 50MHz band. The purpose of pre-amplifiers is to improve receiver sensitivity for the pursuit of higher gain and a better noise figure. Icom IC-7700 employs a noiseless feedback design with push-pull amplifiers. Using feedback transformers, the pre-amplifiers provide a high IP3 while keeping a low noise figure.

1st Mixer

The 1st mixer stage is driven with a signal from the high-drive Local Oscillator with excellent C/N. A 16V p-p of high-level LO signal is applied to the mixer to improve intermodulation characteristics while avoiding a parasitic

Icom IC-7700 Specifications

General
Frequency coverage*1 U.S.A. Version Rx TxEurope, UK Version Rx Tx	0.030– 60.000 MHz*2 1.800– 1.999 MHz 3.500– 3.999 MHz 5.3305, 5.3465, 5.3665, 5.3715, 5.4035 MHz*3 7.000– 7.300 MHz 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 50.000–54.000 MHz0.030– 60.000 MHz*2 1.810– 1.999 MHz 3.500– 3.800 MHz 7.000– 7.100 MHz (Europe version) 7.000– 7.200 MHz (UK version) 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 50.000– 52.000 MHz *1 Frequency ranges vary depending on version. *2 Some frequency ranges are not guaranteed. *3 Carrier point frequency. USB mode only.
Mode	USB, LSB, CW, RTTY, PSK31, AM, FM
Number of channels	101 (99 regular, 2 scan edges)
Antenna impedance	50Ω unbalanced (Tuner off)
Antenna connector	SO-239×4 and BNC×1
Power supply requirement	85–265V AC
Temperature range	0°C to +50°C; +32°F to +122°F
Frequency stability	Less than ±0.05ppm (0°C to +50°C, after warm up)
Frequency resolution	1 Hz (minimum)
Power consumption Tx Max. power	Tx Max. power 800VA Rx Stand-by 200VA (typ.) Max. audio 210VA (typ.)
Dimensions (W×H×D) (projections not included)	425 × 149 × 437 mm; 1623⁄32 × 57⁄8×177⁄32 in
Weight (approx.)	22.5kg; 49.6lb

Transmitter
Output power SSB, CW, RTTY, PSK31, FM AM	(continuously adjustable) 5–200W 5–50W
Modulation system SSB AM FM	DPSN modulation Digital low power modulation Digital phase modulation
Spurious emission HarmonicsUnwanted emissions (Except harmonics)	More than 60dB (HF bands) More than 70dB (50 MHz band) More than 50dB (HF bands) More than 66dB (50 MHz band)
Carrier suppression	More than 63dB
Unwanted sideband suppression	More than 80dB
TX variable range	±9.999 kHz
Microphone impedance	600Ω (8-pin connector)

Receiver
Receive system	Double conversion super-heterodyne system
Intermediate frequencies 1st 2nd	64.455 MHz 36 kHz
Sensitivity (typical) SSB, CW, RTTY (BW: 2.4 kHz at 10dB S/N)AM (BW: 6k Hz at 10dB S/N)FM (BW: 15 kHz at 12dB SINAD)	0.1–1.799 MHz 0.5μV (Pre-amp 1 ON) 1.8–29.999 MHz 0.16μV (Pre-amp 1 ON) 50.0–54.0 MHz 0.13μV (Pre-amp 2 ON) 0.1–1.799 MHz 6.3μV (Pre-amp 1 ON) 1.8–29.999 MHz 2μV (Pre-amp 1 ON) 50.0–54.0 MHz 1μV (Pre-amp 2 ON) 28–29.990 MHz 0.5μV (Pre-amp 1 ON) 50.0–54.0 MHz 0.32μV (Pre-amp 2 ON)
Squelch sensitivity (Pre-amp: OFF) SSB, CW, RTTY, PSK31 FM	Less than 5.6μV Less than 1μV
Selectivity (representative value) SSB, RTTY (BW: 2.4 kHz)CW (BW: 500 Hz)AM (BW: 6 kHz)FM (BW: 15 kHz)	More than 2.4 kHz/–3dB Less than 3.6 kHz/–60dB More than 500 Hz/–3dB Less than 700 Hz/–60dB More than 6.0 kHz/–3dB Less than 15.0 kHz/–60dB More than 12.0 kHz/–6dB Less than 20.0 kHz/–60dB
Spurious and image rejection ratio	More than 70dB
Audio output power	More than 2.6W at 10% distortion with an 8Ω load
RIT variable range	±9.999 kHz
PHONES connector	3-conductor 6.35 (d) mm (1⁄4″)
EXT SP connector	2-conductor 3.5 (d) mm (1⁄8″) /8Ω

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

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