The WiNRADiO WR-G65DDC 'EXCALIBUR Sigma' is a top performance, direct-sampling, software-defined, wide-band, two-in-one HF/VHF receiver with two frequency ranges from 1 kHz to 88 MHz and from 118 MHz to 190 MHz. The receiver has two independent and mutually exclusive inputs, one per each range. It includes a real-time 88 MHz wide spectrum analyzer (72 MHz in VHF range) and up to 64 MHz wide instantaneous bandwidth available for recording, demodulation and further digital processing.

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 excellent sensitivity, selectivity and dynamic range, highly accurate and stable tuning, and perfect demodulation. These key features create a receiver in a class of its own, with wide application potential, with many operational and instrumentation features not usually found on receivers of any price category.

The entire 64 MHz DDC (digitally down-converted) bandwidth is available for recording and demodulation, and ideal for hopping frequencies analysis. Three demodulators allow the simultaneous reception and decoding of radio signals within the entire band.

The receiver's robust front-end is equipped with an ultra-high-linearity amplifier which results in exceptional strong-signal performance while at the same time offering excellent sensitivity.

The WR-G65DDCe also features optional external reference clock inputs and outputs, coherence clock input, 1PPS pulse input as well as an FPGA interface, ready for phase-coherent system configurations such as in high performance interferometer direction finding applications. In addition, stereo analog output is also possible, as well as wide audio (10 Hz-150 kHz). The special data port offers numerous possibilities which include GPIO (general purpose I/O), HSP (high speed data output), or traditional RS232 interface.

The receiver interfaces to a Windows-compatible PC via USB 3.0, or 1 Gb Ethernet LAN port with PoE (Power over Ethernet functionality according to IEEE 802.3at standard).

The receiver is very well shielded against interference, making it possible to operate in a noisy computer environment. Its modest power requirements are less than 12 watts. While connected via LAN interface, thanks to PoE built-in functionality, the receiver can be operated and powered via a long Ethernet cable connection.

  • go2signals support (under development, asks shoc)
  • Direct sampling, Digital down-conversion
  • Excellent dynamic range
  • 16-bit 210 MSPS A/D converter
  • Ready for Phase-coherent system configurations
  • Three parallel demodulator channels
  • USB and LAN interface

Technical data

Feature Data
Receiver type Direct-sampling, digitally down-converting software-defined receiver with two independent and mutually exclusive inputs, one per each range.
Frequency ranges Range 1: 1 kHz to 88 MHz
Range 2: 118 MHz to 190 MHz
Tuning resolution 1 Hz
Mode AM, AMS, LSB, USB, DSB, ISB, CW, FMN, FSK, UDM (user-defined mode), DRM mode (optional)
Image Rejection
1 kHz to 88 MHz
100 dB typ. (within frequency range 1-35 MHz)
>85 dB (within frequency range 35-88 MHz)
Image Rejection
118 MHz to 190 MHz
>80 dB (within frequency range 130-185 MHz)
>60 dB (within frequency range 118-130 MHz)
1 kHz to 88 MHz
-3 dBm typ. (Preamp OFF)
-13 dBm typ. (Preamp ON)
118 MHz to 190 MHz
-7 dBm typ. (Preamp OFF)
-17 dBm typ. (Preamp ON)
1 kHz to 88 MHz
+40 dBm typ. (Preamp OFF)
+28 dBm typ. (Preamp ON)
118 MHz to 190 MHz
+21 dBm typ. (Preamp OFF)
+7 dBm typ. (Preamp ON)
Input damage level +30 dBm
1 kHz to 88 MHz
111 dB (Preamp OFF)
109 dB (Preamp ON)
118 MHz to 190 MHz
101 dB (Preamp OFF)
97 dB (Preamp ON)
Noise figure
1 kHz to 88 MHz
16 dB (Preamp OFF)
9 dB (Preamp ON)
Noise figure
118 MHz to 190 MHz
14 dB (Preamp OFF)
6 dB (Preamp ON)
1 kHz to 88 MHz
-128 dBm @ 10 MHz, 500 Hz BW (Preamp OFF)
-135 dBm @ 10 MHz, 500 Hz BW (Preamp ON)
118 MHz to 190 MHz
-130 dBm @ 150 MHz, 500 Hz BW (Preamp OFF)
-138 dBm @ 150 MHz, 500 Hz BW (Preamp ON)
Preselection Filters Bank
1 kHz to 88 MHz
18 filters available in automatic or manual mode
HPF: 850 kHz, 2.4 MHz, 5.4 MHz, 11.8 MHz
LPF: 3.1 MHz, 5.4 MHz, 11.8 MHz, 23.3 MHz
10 bandpass, OFF - bypass
LO Phase noise -145 dBc/Hz @ 10 kHz
Internal spurious below -110 dBm
RSSI accuracy 2 dB typ.
RSSI sensitivity -140 dBm
Processing and recording bandwidth 20 kHz - 64 MHz over USB 3.0
20 kHz - 6.4 MHz over USB 2.0
20 kHz - 16 MHz over 1Gbps LAN
Demodulation bandwidth
1 Hz - 64 kHz
(continuously variable in 1 Hz steps)
Spectrum analyzers Input spectrum/waterfall, 88/72 MHz BW, 2.8 kHz RBW
DDC spectrum/waterfall, 64 MHz BW, 1 Hz RBW
Channel spectrum, 64 kHz BW, 1 Hz RBW
Demodulated audio, 24 kHz BW, 1 Hz RBW
ADC 16 bit, 210 MSPS
Tuning stability 0.1 ppm (0 to 50 °C)
Antenna inputs 2 x 50 ohm (SMA connectors)
Output 24/16-bit digitized I&Q signal over USB/LAN interface
Interface USB 3.0
USB 2.0
1 Gbit Ethernet with PoE (Power over Ethernet)
Self-diagnostics IT (Built-In test) of the signal and processing path.
Thermal management - temperature monitoring.
Power supply 10 W (12 V/800 mA), or
12 W (PoE - IEEE 802.3at)
Operating temperature 0 to 55 °C
Dimensions 166 x 97 x 59 mm (6.5" x 3.8" x 2.3")
Weight 811 g (28.6 oz)