User manual ICOM IC-726

[. . . ] When compared to a typical triple-conversion system, the double-conversion system is more difficult to implement but it dramatically reduces signal distortion and provides a high-fidelity RF signal to the DSP processor. Receiver System Noise floor level 90° Phase shifter Inband dynamic range characteristics Compared to the IC-756PROIII Audio output level [dB] Antenna Input [dBm] Three built-in 1st IF (roofing) filters, including 3kHz T h e I C - 7 6 0 0 h a s t h r e e bu i l t - i n 1 s t I F (roofing) filters ahead of the 1st IF amplifier stage. The 3kHz filter is especially effective in CW and SSB modes to eliminate overloading caused by strong signals just outside the passband. Typical triple-conversion receiver 6kHz, 3kHz and 15kHz 1st IF filters (from top to bottom) Digital IF filter The IC-726 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 The IC-726 double-conversion receiver with image-rejection 2nd mixer rare DX station while your competition's still tweaking their transceiver controls. [. . . ] Three filter memories allow you to change filter settings instantly, a great help during contesting or other high-rate operating. Digital IF filter setting example e i v e r p e r f o r m a n c e s t a n d a r d s a l l D X 'e r s h a v e c o m e t o e x p e c t Above photo includes optional SP-23 and IC-PW1/EURO. Digital twin PBT After "building your own" digital IF filter, you can use 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 blanker A 100-step digital noise blanker reduces interference from pulse-type noise sources such as engine ignition systems. Dualwatch function Digital notch filter Dualwatch allows you to receive two signals in the same band simultaneously. Signals such as heterodynes and AM carriers can be eliminated with automatic notch filter technology, m a k i n g i n t e r fe r e n c e f r o m R F sources such as beat signals and RTTY signals a thing of the past. You can also choose three shape factors for the notch filter, to optimize interference rejection. Manual notch filter characteristics For example, you can listen to a DX station transmitting on 14. 025MHz while also listening to the pileup calling him on 14. 030MHz. Dualwatch receiver (Same band only) Noise reduction The processing power of the 32-bit DSP produces results you can hear!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 Reduction ON Noise Reduction Characteristics Noise Reduction OFF High stability TCXO unit The IC-726 provides ±0. 5ppm frequency stability using a high stability temperature-compensate crystal oscillator (0°C to +50°C). This high stability TCXO unit offers stable operation even during continuous transmission on RTTY or PSK31 mode. TCXO Unit Versatile Functions and Intuitive Operation 5. 8 inch ultra-wide viewing angle TFT display The IC-726's ultra-wide viewing angle display has excellent color rendition and high contrast ratio with fast response time. These features allow the spectrum scope and simulated analog meters to move smoothly and naturally. White LED backlighting offers faster start-up, stable brightness, and very long life. Digital voice memory With digital voice memory, you can record the incoming signal and immediately replay the audio, a must-have feature for DXing and contesting. Because the transceiver is recording continuously, time-shift playback can replay the 15 seconds of audio that you heard <before> you pushed the Rec button!In addition, 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. With this flexibility of DSP-based waveform shaping, transmit audio quality is adjustable to your preference. Built-in memory keyer Built-in memory keyer provides 4 channels for CW mode and 8 channels each for RTTY and PSK31 modes, capable of storing up to 70 characters for each channel. The memory keyer is useful for sending CQ or exchanging numbers during contests. When not contesting, you can store and send your name, QTH, rig, etc. With a USB keyboard, you can send memory contents using a function key on the keyboard. High power final amplifiers High-power FET transistors, RD100HHF1, are used in the PA unit providing excellent signal quality and low IMD characteristics. With a large heat sink and cooling fans, reliable 100W output at high duty cycle can be used, for example in contesting or data modes. Memory keyer screen High power FET Transistors USB connectors on the front and rear panel The IC-726 has one USB connector on the front panel and one on the rear panel. You can connect a USB keyboard or USB flash drive to the front panel (type A plug) and connect a PC to the rear panel (type B plug). [. . . ] You can connect a USB keyboard or USB flash drive to the front panel (type A plug) and connect a PC to the rear panel (type B plug). Using the CI-V data format and external software*, you can control the IC-726 from a PC via the USB port. You can also transfer audio, both transmit and receive, via the USB port. [. . . ]