WA-0831 Antenna Distribution System

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he WiNRADiO WA-0831 Antenna Distribution System is an antenna switching and distribution device. While it particularly excels in combination with the WiNRADiO MS-8118/G3Multichannel Surveillance and Monitoring System, this device can also be used with third-party receiver systems. It can be operated stand-alone via front panel controls, or remotely via USB or LAN interface.


 Wide frequency range from 0.4 MHz to 1.8 GHz
 4 antenna inputs, 8 receiver outputs
 Custom configurations available
 Manual or remote control
 High IP3 matrix switches and amplifiers
 High isolation
 Ruggedized enclosure for mobile operations

The WA-0831 system features 4 separate inputs for the HF/VHF/UHF ranges (a suitable mix of HF, VHF and UHF inputs is factory-customizable at the time of order) and 8 receiver outputs. Internally, the system consists of antenna matrix switches and high dynamic range preamplifiers.

The WA-0831 system is eminently suitable for government, defence, law enforcement and other demanding high-end applications.

Bottom frequency
Top frequency
0.4 MHz
30 MHz
30 MHz
300 MHz
300 MHz
1.8 GHz
The antenna inputs can be customized and configured according to the user request by using HF, VHF and UHF modules for frequency ranges shown in the adjacent table.

The unit also contains convenient power supplies for external antenna preamplifiers (12 V current-limited DC voltage source is internally applied to the antenna inputs).

Front Panel

WA-0831 Front Panel

The WA-0831 front panel contains 4 x 8 LED-illuminated matrix switch buttons, a remote enable button and the power switch.

Rear Panel

WA-0831 Rear Panel

The four antenna inputs use N-type connectors located at the rear of the device. The eight outputs are connected to the receivers using SMA connectors.

A connection to the USB port is via a standard USB-B connector and the LAN network interface is via an RJ45 connector.

WA-0831 Software

When used with the WiNRADiO MS-8118/G3 Multichannel Surveillance and Monitoring System, the WA-0831 software integrates seamlessly with the system.

When used stand-alone, or in conjunction with third-party receiver systems, the WA-0831 unit can be controlled either manually using the operator control panel, or remotely via a supplied software application.

Programmers' SDK API is also available, to facilitate OEM integration and third-party application development.

How to Order

The WA-0831 is factory-configurable for any combination of the four antenna inputs, which can be either HF, VHF or UHF. For example, a WA-0831 unit can have four HF inputs, or four VHF inputs, or one HF plus one VHF plus two UHF inputs, etc.

The order code is in the form of WA-0831/nT-nT-.. where n is the number of inputs of a particular input model type T. There are three possible types:

Type Code
Bottom frequency
Top frequency
0.4 MHz
30 MHz
30 MHz
300 MHz
300 MHz
1.8 GHz

All combinations are possible, as long as the total number of inputs is four. Here are a few common configuration examples:

Product Code Description
WA-0831/4H 4 x HF (0.4-30 MHz) inputs
WA-0831/4V 4 x VHF (30-300 MHz) inputs
WA-0831/4U 4 x UHF (300-1800 MHz) inputs
WA-0831/2H-V-U 2 x HF (0.4-30 MHz), 1 x VHF (30-300 MHz), 1 x UHF (300-1800 MHz) inputs
WA-0831/H-2V-U 1 x HF (0.4-30 MHz), 2 x VHF (30-300 MHz), 1 x UHF (300-1800 MHz) inputs
WA-0831/H-V-2U 1 x HF (0.4-30 MHz), 1 x VHF (30-300 MHz), 2 x UHF (300-1800 MHz) inputs
WA-0831/2V-2U 2 x VHF (30-300 MHz), 2 x UHF (300-1800 MHz) inputs
Technical Specifications
Configuration 4 inputs / 8 outputs 
RF Connectors 4 x input (N-female) 
8 x output (SMA-female)
HF and VHF inputs -2 dB (± 3 dB)
UHF input -2 dB (± 4 dB)
HF input 12 dB
VHF and UHF inputs 8 dB
Frequency range Depends on input module configuration.
(0.4 MHz to 1.8 GHz when using all HF, VHF and UHF input modules.)
Impedance 50 ohm (all inputs and outputs)
Max. input level for no damage
HF and VHF inputs +22 dBm
UHF input +17 dBm
HF input +13 dBm @ 14 MHz
VHF input +20 dBm @ 150 MHz
UHF input +8 dBm @ 1000 MHz
HF input +27 dBm @ 14 MHz
VHF input +33 dBm @ 150 MHz
UHF input +23 dBm @ 1000 MHz
Output-to-output isolation -109 dB @ 10 MHz
-88 dB @ 100 MHz
-74 dB @ 400 MHz
-68 dB @ 1500 MHz
Input-to-output isolation -60 dB @ 10 MHz
-44 dB @ 100 MHz
-46 dB @ 400 MHz
-48 dB @ 1500 MHz
Power supply for active antennas 12 V DC (max 0.4 A) on antenna inputs of HF, VHF and UHF modules
Remote control interfaces USB 1.1/2.0 (USB-B connector)
LAN interface for TCP/IP networks (RJ45 connector)
Power 120/240 VAC, 50 Hz, selectable 
8–15 W (according to configuration)
Dimensions Width: 19" rack
Height: 3RU (5.25" = 133 mm)
Depth: 14.4"(365 mm)
Weight Approx. 19.5 lb (8.8 kg) 
(according to configuration)

1. All values are typical.
2. Specifications are subject to change without notice due to continuous product development and improvement.

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