WR-G400 Downconverter

G400 Downconverter

Features

  Feeder mount
  High gain
  PLL synthesizer based
  Low phase noise oscillator
  Good oscillator stability
  Very low noise figure
  Ruggedized to IP65 rating

The WiNRADiO WR-G400 block downconverter is a standalone device which translates a range of L-Band frequencies to mid-band VHF, centered at 142.7 MHz.

This compact, weatherproof device can be mounted directly onto the dish feedpoint (such as the WiNRADiO WR-AX-400D-PF Patch Feeder) using an N-type coax connector, thereby eliminating the use of high-frequency cable and associated signal losses.

The downconverter employs a fixed 1552.3 MHz frequency synthesiser in a phase locked loop which ensures a very low phase noise and stability over a wide temperature range. The low-side frequency injection produces a non-inverted IF output spectrum.

Stop-band attenuation of more than 70 dB is achieved at 1810 MHz, where unwanted leakage from GSM cellular networks could occur.

The IF output signal is provided with an output impedance of 50 Ohm via a female SMA connector, with a fixed gain of 55 dB.

Power of nominally 12V is supplied to the device via the IF output coax cable. If the receiver connected to the downconverter does not support this, power can be supplied via a suitable power injector, such as the WiNRADiO WR-BT-3500.

The converter is packaged in a surface treated aluminium enclosure which provides ingress protection that conforms to IP65 rating.


Technical Specifications
Model WR-G400
Type Block Downconverter
Conversion Single stage
IF Spectrum Inversion None
Input Frequency Range 1680 - 1712 MHz
Input Impedance 50 Ohm
Gain 55 dB fixed
Dynamic Range > 55 dB
Noise Figure 0.8 dB typical, 1.2 dB maximum
Stop-Band Attenuation > 70 dB at 1810 MHz
1dB Compression Output +10 dBm
LO Frequency 1552.3 MHz
LO Stability 2.5 ppm (-20 to +50C )
Output Center Frequency 142.7 MHz
Output Impedance 50 Ohm
Power Supply 8-15 V DC @ 160 mA via IF output coax cable
Input Connector N-Type male
Output Connector SMA female
Operating Temperature -20 to +50C
Humidity Tolerance 0 - 100%
Construction Aluminium enclosure
Environmental Protection IP65
Surface Finish Anodised
Dimensions 137 x 47 x 30 mm (5.39" x 1.85" x 1.18")
Weight 0.5 kg (1.1 lb)

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