The Professional Audio and Small Series & Customization teams from Sennheiser have used their knowledge to develop this addition to their line-up of professional wireless systems: the active antenna combiner ACA 3. Sennheiser supports the use of distributed antenna systems with a range of high-specification custom antenna combiners to allow wireless microphone coverage over multiple rooms and large or complex sites.

With the increasing demand for “zone” systems in various situations including large churches, broadcast installations, outdoor sporting events and reality TV shows, Sennheiser‘s engineers have used this expertise to develop the ACA 3, a compact and easy to deploy 2 x 4:1 antenna combiner compatible with all analog and digital Sennheiser wireless stationary receivers operating in the supported frequency range of 470 to 798 MHz.

Includes

• ACA 3 Active Antenna Combiner
• 3 Mains cables (for EU, UK and US plug)
• Quick guide
• Safety guide

Features

• 2 x 4:1 combiner at unity gain
• Switchable DC: supplied on each antenna input for head amps or active antennas, e.g. AB 3, AB 3700, A12AD, AB 9000
• Switchable RF: RF from each of the eight antenna inputs is switchable to isolate unused antennas
• Visual indication: LEDs indicate input state; RF on, DC on and DC current overload (e.g. faulty “short circuit” antenna cable)

Specifications

• Connector: BNC female, 50 Ω
• Dimensions (H x W x D): 1.69 x 19.02 x 8.07 in (43 x 483 x 205 mm), 19", 1U
• Frequency range: 470-798 MHz
• Gain: 0 dB, ±3dB @ 470-790 MHz
• Output voltage: 12 V, 250 mA max (overload protected)
• Operating relative humidity: 5% to 95%
• Operating temperature: 14°F to 104° (-10°C to +40°C)
• Power supply; 100-240V~ / 50-60Hz / 1A
• RF input: +10 dBm max 10 mW / channel
• RF output: IP3: >37 dBm (typ.); 1 dB cp: >20 dBm
• Specials: Chanel isolation (when switched OFF): 69 dB (typ.)
• Storage temperature: -4°F to 158°F (-20°C to +70°C)
• Weight (incl. plug, cable): Approx. 6.1 lbs (2.75 kg)