The PA821B active broadband antenna combiner streamlines the simultaneous operation of many PSM systems at a venue. The PA821B combines the RF outputs from up to four PSM transmitters into one RF output to feed a single transmit antenna. This provides significantly improved reception quality due to reduced intermodulation distortion and dropouts due to multipath interference. (Directly replaces PA421A.)
The PA421B is compatible with Shure PSM300, PSM 900 and PSM 1000.
Shure PA421B Features
- Combines up to four PSM transmitters to a single antenna set for improved RF networking & reduced rack clutter.
- 4 Input LED signals (green when active; off when inactive)
- Quieter, temperature-sensitive fan for significant reductions in ambient unit noise and heat
- Daisy-chain up to 2 combiners with the expansion port.
- LED indicators for signal presence and signal overload
- PA421B Antenna Combiner1
- IEC Power Cord1
- 2 ft. DC power output cables4
- 22 in. coaxial cables, BNC terminated One (1) 11 in. coaxial cable, BNC terminated4
- RF Frequency Range
- PA421B: 470-865 MHz
- PA421BX: 865-960 MHz
- Impedance50Ω
- Operating Temperature Range −18°C (0°F) to 63°C (145°F)
- Power Requirements 100 to 240 V AC, 50-60 Hz
- Current Drain 1.09 A (referenced at 100 V AC) (109 VA)
- Power Consumption 98 W max.
- RF Input
- Connector Type: BNC
- Configuration: Active
- Impedance: 50Ω
- RF Gain: 0 dB (±2 dB)
- LED Indicator Min. Detection Threshold: 2.5 dBm
- LED Indicator Overload Threshold: >24 dBm
- Main Output
- Connectory Type: BNC
- Impedance: 50Ω
- Expansion Port
- Connector Type: BNC
- Configuration: Passive
- Impedance: 50Ω
- Insertion Loss: <4 dB
- RF Expansion Port Normal Operating Range 33 dBm (2 W)
- DC Outputs
- Output Voltage: 15V DC
- Output Current (Per Output): 660 mA max
- Output Power (Per Output): 9.9W
- LED Indicator Min. Detection Threshold: 85 mA
- LED Indicator Overload Threshold: >660 dBm
