Description
Icom and the renowned IC-756PRO series continue to make ham radio history.
The 756PRO Third Generation’s Features.
Receiver gives +30dBm third-order intercept point*
Using receiver design techniques introduced in the IC-7800, Icom’s engineering team focused on producing a distortion-free, high-dynamic-range. To achieve this goal, Icom used higher-grade components in vital receiver sections of the IC- 756PROIII.
The BPF switching circuitry is one of the critical points in a receiver where distortion can be produced by strong out-of-band signals. Distortion at this early receiver stage then propagates throughout the remaining stages and cannot be removed by signal processing. The IC-756PROIII uses low distortion diodes with wide frequency characteristics that prevent formation of distortion components in the BPF stage.
The IC-756PROIII uses a fundamental mode monolithic crystal filter for the roofing filter. Although it’s more expensive than overtone-mode filters, the fundamental mode filter has a better shape factor and is less susceptible to intermodulation distortion under strong signal conditions. This is the same 15kHz crystal filter used in the IC-7800 roofing filter circuit.
To minimize distortion and maximize dynamic range, the IC-756PROIII preamplifiers use the same basic circuit design as the IC-7800 preamplifiers. Preamp-1 is a noiseless feedback design, with push-pull amplifiers. This design has a high intercept point and covers a wide frequency range. Preamp-2, which uses bipolar transistors for higher gain, is ideal when you use separate low-efficiency receiving antennas such as small loops or Beverages.
The real time spectrum scope is now an indispensable tool for top performing HF radios. The IC-756PROIII’s spectrum scope adds a mini scope function, as requested by many PROII users. The mini scope allows you to monitor the scope screen while you use other function menus. For example, you can monitor the scope screen even while you are changing the IF filter shape and passband width. The scope range can be set in 4 steps ±12.5 kHz, ±25 kHz, ±50 kHz and ±100 kHz, centered on the receiving frequency. In addition, the spectrum scope has 3 attenuator levels (10dB, 20dB and 30dB).
The SSB transmit bandwidth is selectable from 100, 300 and 500Hz at the high-pass edge, and 2500, 2700 and 2900Hz at the low-pass edge respectively. 3 types of high and low combinations can be stored in the memory. In addition, the built-in audio equalizer has separate bass and treble adjustments for a total of 121 combinations, so you can tone your voice up or down as you want. With this flexible DSP-based waveform shaping, you can tailor your transmit audio quality to suit your operating style.
32-bit floating point DSP & 24-bit AD/DA converters
32-bit floating point DSP & 24-bit AD/DA converters The heart of the IC-756PROIII 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 exclusive to the IC-756PROIII, which cannot be achieved with traditional analog processors. The 24- bit AD/DA converter has an ultra-wide dynamic range. The receiver delivers a distortion- free, clear sound in any signal condition, from a weak signal to a strong full power station.
The dual watch* function allows you to receive 2 signals on the same band simultaneously. You can listen to your favorite net while keeping an eye or ear on the DX station. The signal strength balance between the main and sub frequencies is adjustable from the balance knob. An incredible 70dB of attenuation is at your command with the manual notch. Eliminate strong adjacent signals or beat tone noise, without reducing the performance of the AGC gain.
Accessories supplied with radio: ORIGINAL BOX, DC-POWER LEAD, SPEAKER MICROPHONE
Specifications:
RF output power:
AM: 5-40/5-40 W
FM: 5-100/5-100 W (100% duty cycle)
SSB: 5-100/5-100 W (100% duty cycle)
CW: 5-100/5-100 W (100% duty cycle)
RTTY: 5-100/5-100 W (100% duty cycle)
Frequency range:
TX: 10-160 m + WARC / 50-54 MHz
RX: 0.03-60 MHz
Current drain / power consumption:
RX: Max 3.5 A
TX: Max 23 A
Modulation system:
AM: Low power modulation
FM: Phase modulation
SSB: PSN modulation
Other features:
32 bit IF-DSP. Built-in RTTY demodulator and auto-ATU. IP3 = +30 dBm.
Built-in keyer. 5″ color TFT. CI-V computer control.
Dimensions (W*H*D): 340*111*285 mm (13.4*4.37*11.22″)
Weight: 9.6 Kg (21.16 lb)
