WR-G313 | WiNRADiO

WiNRADiO » WR-G313

Double-conversion PC controlled receiver with last IF in digital technology (Software Defined Radio). All-mode, frequency range 0.009-30 MHz expansible up to 180 MHz with optional unit. Ideated in USA.

Reference market : ham-radio

General :
Frequency coverage 0.0090 ~ 30.0000 MHz
0.0090 ~ 180.0000 MHz [1]
Modulation mode CW / LSB / USB / ISB / AM / AM-S / FM / DRM [2]
Tuning step 1 Hz min
Receiver :
Sensitivity CW 7.1 uV (0.01 MHz, 10dB S/N)
2.8 uV (0.025 MHz, 10dB S/N)
1.8 uV (0.05 MHz, 10dB S/N)
0.5 uV (0.1 MHz, 10dB S/N)
0.18 uV (0.15~0.5 MHz, 10dB S/N)
0.13 uV (0.5~1.5 MHz, 10dB S/N)
0.07 uV (1.5~120 MHz, 10dB S/N)
0.09 uV (120~180 MHz, 10dB S/N)
SSB 0.40 uV (0.15~0.5 MHz, 10dB S/N)
0.28 uV (0.5~1.5 MHz, 10dB S/N)
0.25 uV (1.5~120 MHz, 10dB S/N)
0.32 uV (120~180 MHz, 10dB S/N)
AM 1.60 uV (0.15~0.5 MHz, 10dB S/N)
1.10 uV (0.5~1.5 MHz, 10dB S/N)
0.90 uV (1.5~120 MHz, 10dB S/N)
1.10 uV (120~180 MHz, 10dB S/N)
FM 0.70 uV (0.15~0.5 MHz, 12 dB SINAD)
0.50 uV (0.5~1.5 MHz, 12 dB SINAD)
0.32 uV (1.5~120 MHz, 12 dB SINAD)
0.40 uV (120~180 MHz, 12 dB SINAD)
MDS (Minimum Detectable Signal) -135 dBm
Selectivity 0.001 ~ 15 KHz user-defined [3]
RF attenuator 0 / 18 dB
Dynamic range 95 dB
IP3 (3rd order intercept point) +8 dBm
Image rejection 65 dB
Frequency stability ± 0.5ppm with temperature from 0°C to +60°C
Frequency accuracy ± 1ppm at +25°C
Intermediate frequency 45 MHz
12~22 KHz
Features :
Memory Unlimited memory channels
Antenna SMA 50Ω connector [4]
Power supply External
Connections USB
Mechanical and environmental data :
Dimensions 164 (W) x 41 (H) x 96 (D) mm
Weight 480g

[1] 180 MHz with optional unit
[2] DRM mode optional
[3] With 1 Hz steps
[4] SMA / BNC adapter provided

Description :

The WR-G313 is an SDR receiver for HF and VHF, the basic version covers up to 30 MHz while the band from 30 to 180 MHz is optional requiring an additional module. The salient feature of this WiNRADiO device is the remarkable sensitivity that makes it possible to monitor for example CW signals on levels of just 0.05 uV, this performance is well suited to listening stations that use internal antennas or of limited size. The S-meter tool implemented in the interface also offers a high accuracy, the indication is available in addition to S standard points also in dBm and uV. The receiver has a circuit with mixed architecture. Analogous in the two frequency conversions, the first uses a 15 KHz wide quartz roofing filter composed of two 4-pole cells, subsequently digital integrating a dedicated DSP in the hardware to define the filtering of the signals and their demodulation. The computer, connected via USB to the WR-G313, implements further processing and analysis by means of the software.

The filters bandwidth is adjustable in 1 Hz steps over the entire 0.001 ~ 15 KHz range, thus covering all the listening needs in the various modulations. Spectrum analysis operates in real time on 20 KHz wide showing the signal components with a resolution of 16 Hz. The 20 KHz segment of the digitized IF can be recorded on the PC to be reproduced at another time by freely setting selectivity, mode, notch filter, noise-blank. As far as the analysis functions are concerned, the software allows to measure an entire set of parameters on the tuned channel such as the depth of modulation in the AM, the frequency deviation in the FM, the distortion and the SINAD that quantify the signal quality, the audio spectrum with a detail of 5 Hz. In addition to the narrowband spectrum analysis there is also the panoramic analysis function that incorporates very interesting display utilities such as the ability to show the traces of minimum / maximum activity and automatic search for the identification of emission peaks.

Performance and practical notes :

Those interested in the receiver pay attention to the fact that the device is available in two versions. The most common WR-G313e (ndr: here described and visible in the image at the top of the page) is a module to be connected via USB to a PC, the WR-G313i instead develops into a PCI type card. The characteristics do not differ in practice while naturally the type of installation has radically different features. Requirements for the PC are a Pentium 500 MHz CPU or higher and Windows XP and following operating system. Aspect to highlight is that by virtue of its design the apparatus also works in conjunction with a computer dated or otherwise of modest performance. Further known on the spuries generated within the receiver by the various oscillators, these are small and not superior - as stated by the manufacturer - to equivalent signals of 0.4 uV in the antenna input. This behavior is appreciable in general terms but is flanked by a non-ideal image attenuation in the various contexts of use.

Valuation :

Dynamic range
Spurious response
Signal functions
Control functions
User friendly

Stars: 1=insufficient, 2=just sufficient, 3=mediocre, 4=good, 5=excellent

Review :

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