The 'EXCALIBUR Pro' is a high-performance, low-cost, direct-sampling, software-defined, shortwave receiver with a frequency range from 9 kHz to 49.995 MHz. It includes 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, offering many additional features and improvements, such as for example: 4 MHz instantaneous processing bandwidth Low-noise preamplifier Configurable preselection filters Filter bandwidth adjustable down to 1 Hz 0.5 ppm frequency stability Test and measurement functions Pause function The receiver's superior performance results from its innovative, direct-sampling, digital down-conversion architecture along with the use of leading-edge components and design concepts. These all result in a very high IP3, wide dynamic range, high sensitivity, and accurate tuning. These key features create a receiver in a class of its own, with wide application potential, at a very affordable price. The entire 4 MHz DDC (digitally-down-converted) bandwidth is available for recording and demodulation. Three demodulators allow the simultaneous reception of three signal frequencies within the 4 MHz bandwidth. Features 9 kHz to 49.995 MHz continuous frequency range Direct sampling Digital down-conversion 16-bit 100 MSPS AD converter 50 MHz-wide, real-time spectrum analyzer 4 MHz recording and processing bandwidth Continuously adjustable filter bandwidth down to 1 Hz Three parallel demodulator channels Pause function Waterfall display functions Audio spectrum analyzer Audio and IF recording and playback Recording with pre-buffering EIBI, HFCC and user frequency databases support Networking 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 preselector Selectable low-noise preamplifier Test and measurement functions USB 2.0 interface