The ADT-200A is world's first amateur radio transceiver with completely digital signal processing. The device is equipped with the latest DSP technology, moreover it is produced professionally with state-of-the-art technology.
The software algorithms for the signal processing have been carefully developed and have been optimized several times. Tests show that the ADT-200A can keep up with even the best commercial receivers regarding selectivity, sensitivity and intelligibility.
As a novelty the transmit signal is processed by adaptive predistortion, a technique that is used for the first time in amateur radio. This technology stands out due to high efficiency and a remarkably clean transmit spectrum, combined with an exceptionally clear modulation.
The Highlights of the ADT-200A
Receiver
- 4 receivers with independent frequency selection
- Automatic fine tuning for AM and CW via push button
- Audio recorder capable of recording up to 60 minutes
- Several noise blankers eliminate even extreme impulses
- Linear S-meter with an unbelievable range of -148dBm up to +17dBm and a typical error of ±1dB
Transmitter- Adaptive Predistortion allows PA efficiency up to 70% and results in a very clean modulation
- Low distortion voice enhancer replaces the legacy speech compressor
- Clean output spectrum with an intermodulation ratio of >45dBc
- Calibrated VSWR- and power meter working from 100mW
Planned further developments- Spectrum analysis, displayed on a PC
- Audio recorder with a capacity of 1 hour
- Web server module for remote access
- Morse decoder
- Digital operating modes
- Smart Antenna: directional RX antanna, also for the low bands (up to 160m)
- Network analyzer for exact measurement of antenna impedances up to 30MHz
- TRX-Module for 2m and 70cm
The ADT-200A is world's first amateur radio transceiver with completely digital signal processing. The device is equipped with the latest DSP technology, moreover it is produced professionally with state-of-the-art technology.
The receiving portion uses a 14bit A/D converter which offers a S/N ratio of 74dB over the half Nyquist bandwith of 36.86MHz. After the subsequent decimation, a blocking dynamic range of 120dB will be achieved. The ADT-200A uses the latest generation of high performance DSP manufactured by Analog Devices Inc. capable of up to 2 billion instructions per second leaving room for future options.
The power amplifier is equipped with high voltage MOS-FET’s capable of producing 50W within the range of 1.8MHz to 30MHz with an efficiency of up to 70%. Adaptive predistortion delivers an undistorted transmission signal, which is a first in amateur radio application.
The ADT-200A has a front end, along with four parallel receivers and can be enhanced with a VHF/UHF module as an option. Eight independent VFO’s provide many split band operations. Further design highlights include an audio recorder, capable of recording up to 1 hour, an automatic fine tuning for SSB, an antenna scope which allows measurement of the complex antenna impedance and an optional Web server module.
The menu selections of the four receivers and the transmitter is accomplished with only three knobs and 18 push buttons, providing the same functionalities as other high end transceivers. Operator selections are supported by two high resolution graphic displays.
Shipping & Returns