BSRF AS-122

BSRF AS-122 Active Antenna Splitter

The BSRF AS-122 distributes signals from two antennas to up to six diversity receivers. Each of its two separate RF channels has one BNC input and six SMA outputs. Each receiver connects to an A output and a B output, allowing six receivers to share the antenna pair.

RF Distribution and Antenna Power

The filtered inputs support active and passive antennas. Switchable, regulated 12 V DC feed powers suitable active antennas or antenna amplifiers through the coaxial cable. Individual current limiting protects this supply; RF peak indicators warn of excessive input levels.

When using active antennas, gain should compensate for coaxial cable loss. Excessive gain can overload the distribution amplifier. The AS-122 itself takes external power through a four-pin Hirose connector.

Main Features

• Two independent RF paths with twelve outputs in total.
• Supports analogue and digital wireless systems within its operating band.
• Filtered inputs and RF peak indication.
• Aluminium enclosure for audio bag or sound cart use.

Specifications

• Frequency range: 340–770 MHz.
• Gain: 0 dB ±1 dB.
• Noise figure: 1.5 dB.
• Output isolation: at least 15 dB.
• RF inputs: 2 × BNC, 50 Ω.
• RF outputs: 2 × 6 SMA, 50 Ω.
• Antenna power: regulated 12 V, up to 200 mA.
• External power: 12–17 V DC, four-pin Hirose.
• Current consumption without active antennas: 76 mA.
• Dimensions: 88 × 84 × 44 mm; weight: 265 g.

Included

• 1 × AS-122 active antenna splitter.
• 1 × stainless steel wire clip for mounting in four positions.

Connection and Alternatives

Operation requires an external power supply, power cable, two antennas and suitable BNC and SMA coaxial cables. Terminate unused outputs with 50 Ω SMA loads.

See also the BSRF AS-62. To select or combine two antenna pairs, the BSRF AS-84 provides outputs for up to four diversity receivers.