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AW Diversity Antenna Distribution Module [DADM228]

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Product Details
Brand: Audio Wireless

DADM228 is a custom design offers Diversity Antenna distribution solution for portable sound bags or sound carts

Diversity Antenna Distribution Module DADM228 is a custom design, which offers the solution to antenna distribution requirements for portable sound bag and sound trolley applications. Designed for where the weight and size matters without sacrificing on performance. The DADM228 is a 2xIN and 2x8 OUT active antenna distribution system with in-built band-pass filtering; the DADM228 eliminates multiple receiver antennas and provides a tidy sound bag solution with improved RF performance. There are two industry standard BNC input connectors for antenna inputs which enables use of standard low loss RF extension cables, and there 2x8 mini-RF SMA connectors feeding the diversity receivers. The DADM228 has a very high input signal handling capacity with very low noise figure and offers an outstanding inter-modulation performance when compared to other low power devices available. The system box offers, +6dB to -10dB gain user adjustable in 1dB steps to suit individual applications. The user adjustable gain offers flexibility optimizing system RF gain budget to suit, Digital, Hybrid and Analogue receivers are available in our industry. In applications when remote antenna powering is needed, the DADM offers switchable MHA powering with RED LEDs indicating power ON/OFF status, the MHA powering can be turned ON/OFF through the OLED display menu. The antenna inputs compromise a very low loss very selective band-pass filter designs to reject unwanted frequencies below and above the tuning bandwidth. The DADM is externally powered between 10-18Vdc, the dc input connector is an industry standard 4-pin Hirose, a green LED indicates power-on status of the system box and the OLED display continuously displays dc input voltage. Audio Wireless Diversity Antenna and dc power distribution systems are now first choice among freelance sound engineers, hiring companies as well as major broadcasters for all wireless microphone applications.


  • One pair of antenna feeds up to eight diversity receivers
  • Built-in band-pass filtering and signal splitters
  • User adjustable gain
  • Remote antenna powering
  • Industry standard connectors
  • Intuitive OLED display menu and LED indicators
  • Single power source solution
  • Master ON-OFF switch
  • Continuous system volts monitoring
  • Soft ON/OFF switch for each individual Remote Antenna powering
  • CNC machined aluminum custom design, lightweight and rugged - fits neatly in any sound bag or sits in the cart
RF Distribution Section
Frequency Range 470 to 1164MHz(in bands)
Input Impedance 50 Ω
Output Impedance 50 Ω
Gain (each output)

+6 dB to -10dB, user adjustable

Current Consumption 135mA
UHF Bandpass Type
Available Bandwidths

470-700MHz, 470-608MHz, 470-663MHz, 470-960MHz, 470-990MHz, 510-622MHz, 960-1164MHz (UK DME BAND), 470-1164MHz (Covers UK DME BAND)

OIP3 > +41dBm
Port to port isolation > 20dB (min.)
Noise figure < 3 dB
RF Inputs 2 x 50 Ω Standard BNC Sockets
RF/DC outputs to receivers 2 x 4 x 50 Ω mini UHF SMA sockets
Main ON/OFF Switch Master switch
External Power 10-18V dc
Remote Antenna Powering Switchable dc T-bias powering, 12Vdc @ 200mA max, regulated for active antenna powering, short circuit protected
Outer Case
Dimensions 192x42x64mm (W x H x D)
Weight 465g
Related Accessories

16 x SMA to SMA link cables (custom lengths)
2 x BNC to BNC Antenna extension cables (custom lengths)
2 x monopole BNC Antennae
1 x 4-pin Hirose to 4-pin Hirose dc power cable (custom lengths)


2 x LPDA-P


2 x LPDA-A-DT V2

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