Audio Wireless Diversity Antenna Combiner and Distribution Module (DADM224-2C)

A unique custom design for antenna combining, distribution and DC power distribution system. The DADM224-2C is a 4x IN and 2x 4 OUT active antenna combiner and distribution system with in-built low loss band-pass filtering, LNA and user-adjustable gain stage at each RF input.

The DADM224-2C enables the user to cover a 2-zone wider area with improved RF reception. The DADM224-2C eliminates multiple receiver antennas and provides a tidy sound bag, cart and trolley set-up applications with improved RF coverage and performance.

There are four industry-standard BNC input connectors for antenna inputs that enable the use of standard low loss RF extension cables, and there are 2x 4 SMA connectors feeding the diversity receivers. Each antenna input can be individually turned ON/OFF via the OLED menu when not used, with a LED indicator showing the status of each antenna input.

The four switchable DC Hirose power sockets supply dc power to sound bag or sound cart equipment. DADM224-2C is a CNC machined aluminum box to withstand daily location work, finished in black anodizing with clear laser marked legends for long-term readability.

RF DISTRIBUTION SECTION:

• frequency range: 470 to 1164 MHz
• bandwidth: pre-programmed band, specify at order
• input impedance: 50 Ohm
• output impedance: 50 Ohm
• gain (each output): +6 dB to -14dB, user-adjustable
• current consumption: 270mA at 14.0V dc

UHF BANDPASS TYPE

• available bandwidths: 470-608 MHz, 470-654 MHz, 470-700 MHz, 510-698 MHz, 512-614 MHz
• OIP3: > +41dBm
• port to port isolation: > 20dB (min.)
• noise figure: < 2 dB

CONNECTIONS:

• RF inputs: 4 x 50 Ohm standard BNC sockets
• RF outputs: 2 x 4 x 50 Ohm mini UHF SMA sockets
• main ON/OFF switch: master switch
• DC power OUT: 4 x 4-pin Hirose sockets individually fused and protected against reverse polarity

POWERING:

• external power: 10-18V DC
• remote antenna powering: switchable DC T-bias powering, 12Vdc @ 250mA max, regulated for active antenna powering, short circuit protected
• Hirose DC output: unregulated incoming volts, switched, individually fused, and protected against reverse polarity

OUTER CASE:

• dimensions (W x H x D in mm): 192 x 82 x 35
• weight: 420g