舒尔PA系列UHF天线组合器最多可让四台PSM无线发射机共用一根天线（620 - 670 MHz）描述：
Shure PA-Series UHF Antenna Combiners are designed to allow up to four PSM wireless transmitters to use a single antenna. The unit combines four PSM wireless transmitters to a single antenna, reducing stage clutter and improving intermodulation distortion performance (620-670 MHz)功能：
UHF operation
Up to four wireless transmitters can be combined into one transmitting antenna.
Low noise and intermodulation distortion. The PA Antenna Combiner maintains clean signals with minimal distortion.
Microstrip technology for signal combining and filtering.
Four push/pull amplifiers for improved linear performance.
Front-mounted antenna. The PA Antenna Combiner comes with hardware to front-mount the antenna, which allows for better radio transmission.
Dual rackmount hardware. The PA Antenna Combiner comes with hardware so that it can be rackmounted with another PA Antenna Combiner or PSM Transmitter into a single rack space.
规格：
UHF Carrier Frequency Range: PA760: 620 to 670 MHz, PA770: 720 to 750 MHz
System Gain: 0 dB (+2 dB, -4 dB)
Input/Output Port VSWR: Less than 1.7:1
Output Port Isolation: Greater than 23 dB
Third Order Intercept Point (3 OIP): Greater than 25 dBm
Input AC Line Voltage: 100 to 240 Vac, 50/60 Hz (country dependent)
NOTE: This product is not completely disconnected from the mains when the power switch is in OFF position.
Maximum Input Current: 0.5 Aac
Maximum RF Input Power: +20 dBm (100 mW)
Impedance: 50 ohms nominal
Operating Temperature Range: -7 degrees C to +49 degrees C
Overall Dimensions: 44.5 mm high x 197.4 mm wide x 225.6 mm deep (1.75 in. x 7.770 in. x 8.880 in.)
Net Weight: 1.34 Kg (2 lbs, 15.4 oz)
Input/Output Connector Type: BNC-type (4 input, 1 output)特点：
•超高频运行•最多四个无线发射器可以组合成一个发射天线•低噪音和互调失真•微带技术信号合并和过滤•四个推/拉改进的线性高性能的放大器•前置更好的传输天线，安装硬件包括•双机架安装机架安装额外的硬件支持巴勒斯坦权力机构或PSM发射机天线合在一个单一的机架空间
