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   WR-2902e
WR-2902e

The WiNRADiO WR-2902e VHF/UHF Sonobuoy Receiver is designed to receive signals from analogue (DIFAR) and digital (BARRA) sonobuoy transmitters, operating in the 136 to 173.5 MHz frequency range. This standard frequency range can be easily extended up to 1.5 GHz to suit special requirements.

The WR-2902e is a triple conversion superheterodyne receiver. It features a single antenna input, separate analog and digital signal outputs, and an audio output for monitoring.

The receiver is enclosed in a ruggedized aluminium enclosure and can be connected to any standard computer either via a serial port, or (optionally) via USB or PCMCIA ports. As all RF signal processing is performed by the receiver, the computer hardware and software requirements are modest and a standard laptop can be used to control the receiver. More than one receiver can be connected to a single computer, the number depending only on the availability of ports.

The WR-2902e receiver is supplied with Windows based application software and a DLL library developed for easy system integration into custom designed sonobuoy systems.

The Windows application software shows a graphical representation of all installed receivers (a virtual control panel), making it possible to observe the status of all receivers at a glance and make individual adjustments if necessary. Each receiver can be monitored, and a mixing facility is provided where a particular receiver can be selected for audio monitoring by simply clicking on the corresponding receiver panel.

WR-2902e Virtual Control Panel

     WR-2902e Control Panel (a portion only shown)

Technical Specifications

Frequency range136.000-173.500 MHz
Channel spacing375 kHz
ModesAnalogue FM (DIFAR),
High speed digital (BARRA)
Sensitivity0.9 µV (DIFAR),
1.5uV (BARRA)
IF bandwidth230kHz @ -6dB
Skirt selectivity470kHz @ -25dB
730kHz @ -60dB
Frequency responseLess than ± 1 dB variation from 5 Hz to 25 kHz (analog)
5Hz to 150kHz (digital)
Output level1.0 ± 0.1V rms @ 75kHz devn. and 1kHz mod. frequency (DIFAR),
TTL compatible (BARRA)
RSSI rangeExceeds 60dB for 5dB linearity
Image rejection80 dB or better
Frequency stability±20 ppm or better
Input impedance50 ohm (nominal)
ConnectorsRF input (BNC), DIFAR output (SMA), BARRA output (SMA);
3.5mm audio jack for monitoring
Power requirements+12V @ 420 mA
Total power consumption5 W max
Dimensions216 x 121 x 45 mm (8.5" x 4.75" x 1.75")
Mass1350 g (47.25 oz)
Ambient temperatureStorage: -20º to +75º C
Operation: 0º to +45º C

(Specifications are subject to change without notice.)


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