Sennheiser ACA 3 Antenna Combiner

Overview
Sennheiser offers a 2 x 4:1 combiner at unity gain, allowing for efficient and reliable wireless microphone coverage over large or complex sites. This combiner features switchable DC supply on each antenna input, making it compatible with various head amps and active antennas. Additionally, the RF from each of the eight antenna inputs can be switched to isolate unused antennas, ensuring optimal performance.

The ACA 3 is a compact and easy to deploy antenna combiner that supports the use of distributed antenna systems. It is compatible with all analog and digital Sennheiser wireless stationary receivers operating in the frequency range of 470 to 798 MHz. The combiner also includes LEDs to indicate input state, such as RF and DC power on, as well as DC current overload, which can be caused by faulty antenna cables. This makes the ACA 3 a reliable and versatile solution for various situations, including large churches, broadcast installations, outdoor sporting events, and reality TV shows.

Included in box
1x ACA 3
3x mains cable (for EU, UK and US plug)
1x Quick guide
1x Safety guide

About the Sennheiser ACA 3 Antenna Combiner
Sennheiser supports the use of distributed antenna systems with a range of high-specification 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.

Dimensions 43x483x205 [mm] (HxWxD), 19″, 1U
Connector BNC female, 50 Ω
Weight Approx. 2.75 kg
Storage temperature -20°C to +70°C
Operating temperature -10°C to +40°C
Power supply 100 – 240 V AC, 50/60 Hz
Gain 0 dB, ±3dB @ 470-790 MHz
Output voltage 12 V, 250 mA max (overload protected)
Frequency range 470-798 MHz
RF input +10 dBm max 10 mW / channel
RF output IP 3: >37 dBm (typ.); 1 dB cp: >20 dBm
Specials Chanel isolation (when switched OFF): 69 dB (typ.)
Operating relative humidity 5% to 95%

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

RF from each of the eight antenna inputs is switchable to isolate unused antennas

LEDs indicate input state; RF on, DC on and DC current overload (e.g. faulty ‘short circuit‘ antenna cable)