WiNRADIO WR-G33DDC

The award-winning WiNRADiO WR-G33DDC 'EXCALIBUR Pro' is a powerful, cost-efficient, direct-sampling, software-defined shortwave receiver with a frequency range of 9 kHz to 49.995 MHz. It incorporates a real-time 50 MHz wide spectrum analyzer and 4 MHz wide instantaneous bandwidth, available for recording, demodulation and further digital processing.

This product is an advanced version of the WR-G31DDC receiver and offers many additional features and improvements, such as:

• 4 MHz instantaneous processing bandwidth
• Low noise preamplifier
• Configurable pre-selection filters
• Adjustable filter bandwidth up to 1 Hz
• Frequency stability of 0.5 ppm
• Test and measurement functions
• Pause function

The superior performance of the receiver is due to the innovative, direct-sampling, digital down-conversion architecture in combination with the use of advanced components and design concepts. This results in a very high IP3, a wide dynamic range, high sensitivity and precise tuning. These key features make the receiver unique in its class with a wide range of applications at a very affordable price.

The full 4 MHz DDC (digitally-down-converted) bandwidth is available for recording and demodulation. Three demodulators allow you to simultaneously receive three signal frequencies within the 4 MHz bandwidth.

Features of the Winradio WR-G33DDC:

• Frequency range: 9 kHz to 49.995 MHz
• Direct sampling
• Digital down conversion
• 16-bit 100 MSPS A/D converter
• 50 MHz wide real-time spectrum analyzer
• 4MHz recording and processing bandwidth
• Continuously adjustable filter bandwidth up to 1 Hz
• Three parallel demodulator channels
• Pause function
• Waterfall display features
• Audio spectrum analyzer
• Audio and IF recording and playback
• Recording with pre-buffering
• Support for EIBI, HFCC and user frequency databases
• Network version of application software available
• Very high IP3 (+31 dBm)
• Excellent sensitivity (0.20 µV SSB, 0.10 µV CW)
• Excellent dynamic range (107 dB)
• Excellent frequency stability (0.5 ppm)
• Selectable medium wave filter
• User configurable pre-selection
• Selectable low noise preamplifier
• Test and measurement functions
• USB 2.0 interface

Robust Front-End

The receiver’s robust front-end is equipped with an ultra-high linearity amplifier, resulting in exceptional performance with strong signals. This already robust front-end is further enhanced with a user-selectable pre-selector that can be set either automatically or manually. Users can construct up to 119 different filter combinations (91 bandpass, 14 low-pass and 14 high-pass). The front-end uses 34 subminiature electromechanical relays (instead of distortion-sensitive solid-state switches) for high dynamic range.

A user-selectable low-noise preamplifier provides extra sensitivity for receiving even the weakest signals. An advanced dithering technique eliminates spurious signals without significantly raising the receiver's noise floor. The superior 16-bit 100 MSPS analog-to-digital converter provides exceptional performance over an extremely wide signal range.

Software

The WR-G33DDC software provides an elegant and logical user interface. Several spectrum analyzer configurations are available, including the 50 MHz full span with 1.5 kHz resolution. The full zoom display can be viewed in both standard and waterfall modes.

The converted portion is highlighted and can be selected by keyboard or mouse cursor, and then displayed in another window, in which three independent receiver channels can exist. For each channel, the selectivity, IF shift, passband tuning, notch and other functions of the receiver can be adjusted, and the audio spectrum of the demodulated signal can be observed.

Despite the receiver's groundbreaking architecture, the software remains simple and intuitive to use, with all the features typically expected in modern receivers, such as noise reduction, memory functions, scheduler, squelch (level, speech or noise activated), numerous tuning options and a wide range of demodulation modes, including user-defined and optional DRM mode.

The digital down-converter offers 24 selectable output bandwidths ranging from 20 kHz to 4 MHz. The receiver selectivity can be adjusted with a resolution of 1 Hz. The low- and high-pass frequencies of the bandpass audio filter are graphically adjustable, as are the notch filter and the noise suppressor.

The parameters of all three independent channels can be set separately, allowing each channel to be recorded simultaneously and independently. Recording and playback are also possible at the output of the digital down-converter, where a full 4 MHz spectrum band can be recorded for later demodulation. Pre-buffering prevents signal loss at the start of a transmission.

A flexible scheduler function allows unattended recording of any channel at specific dates and times, and built-in support for HFCC, EIBI and user-defined frequency databases allows for effortless frequency storage and maintenance.

There is also a unique "pause" function, the first in the world for a shortwave receiver, which allows you to pause reception and resume it at a time convenient to you. This is very useful if the receiver is left unattended for a period of time.

A "toolbox" full of various test and measurement instruments, such as frequency error, SINAD, THD and modulation meters, logger and planner, complete the entire package and allow this product to be used as a measurement receiver, replacing much more expensive (and often less capable or accurate) conventional test equipment.

The software-defined architecture allows for easy software upgrades for demodulation and decoding requirements. Component variations and obsolescence are greatly reduced in a software-defined receiver, ensuring long-term premium performance.

A network version, which allows the receiver to be controlled remotely via LAN or the Internet, is also available.