Take your DXing to the Next Level
+30dBm-class Third-order Intercept Point The 756PRO Series Legacy Continues to Grow
Icom and the renowned IC-756PRO series continue to make ham radio history: - First 32-bit floating point DSP transceiver
- First transceiver with customizable filter shapes. There were no optional filters to buy, for none were needed.
- First mid-class HF transceiver with +30dBm-class third-order intercept point*
- First amateur HF transceiver with a large TFT color LCD
For the new IC-756PROIII, Icom''s combined the cutting-edge receiver technology of the IC-7800 with the familiar ergonomics of the IC-756PROII. Take your DXing to the next level with Icom''s IC-756PROIII.
(*in the 14MHz Band) The 756PRO Third Generation''s new features New 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 IC756PROIII.
* Under the condition of receive frequency 14.2MHz, input frequencies 14.3MHz and 14.4MHz, Pre-amp OFF, mode USB BW: 2.4kHz Large inductors
The IC-756PROIII uses large inductors instead of small coils in the bandpass filter (BPF) stage, because small coils sometimes cause magnetic saturation in the BPF stage. Large inductors can handle both strong signals and weak signals with lower distortion. Low-distortion BPF switching
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. Fundamental-type 64MHz roofing filter
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 Two newly designed preamplifier
To minimize distortion a |
