UA870 UHF有源指向型天线
UHF有源指向型天线，适用于舒尔U4S、U4D、ULXP、ULXS、UR4S和UR4D接收机，或UA844或UA845天线分配系统。
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舒尔UA870是一款UHF有源无线指向型天线，具有双极化对数周期阵列。与1/2波长全向型天线相比，UA870的心形拾音模式能够更有效地接收预定覆盖区域的信号，并更有效地抵制覆盖区域范围以外的射频信号。
为补偿同轴电缆的信号损失，UA870的板载放大器提供给用户可选的3或10 dB增益。增益设置由两个LED灯显示。 天线放大器采用远程12 V直流电源供电，由舒尔UR4或ULX接收机或舒尔UA845或UA844天线分配系统通过同轴电缆提供。UA870可以安装在话筒支架上、悬挂在天花板上或采用旋转式转接器托架安装在墙壁上。UA870能够抵御恶劣天气影响，适合室外使用。使用两根UA870天线可获得最佳分集性能。
射频频率范围
- UA870A: 782-810 MHz
- UA870KK: 838-862 MHz
- UA870MB: 800-830 MHz
- UA870MC: 774-782 MHz
- UA870UB: 692-716 MHz
- UA870WB: 470-900 MHz
- UA870USTV: 470-698 MHz
- UA870X: 944-952 MHz
- Power Source: Remote 12 Vdc from coaxial cable connection to receiver or antenna distribution system.
- Power Consumption:
- UA870 (A, KK, MB, MC, UB, X): 0.81 W (12 Vdc)
- UA870 (WB, USTV): 68W (12Vdc)
- Antenna Gain: 7 dB typical (on axis)
- Amplifier Gain:
- UA870 (A, KK, MB, MC, UB, X):
- Gain Switch at 3 dB: 3 dB ± 2 dB
- Gain Switch at 10 dB: 10 dB ± 2 dB
- UA870 (WB, USTV)
- Gain Switch at 3 dB: –2, +1.5 dB
- Gain Switch at 10 dB: –1 dB, +3.0 dB
- UA870 (A, KK, MB, MC, UB, X):
- Third Order Intercept Point (3OIP) at output: More than 30 dBm
- Reception Pattern:
- Directional; Cardioid
- 3dB Beam Width: 100 degrees
- Amplifier Gain Indicators:
- 3 dB: Green LED
- 10 dB: Red LED
- Connector: Female, BNC-type
- Dimensions:
- UA870 (A, KK, MB, MC, UC, X): 226 mm x 234 mm x 40.7 mm
- UA870 (WB, USTV): 316.2 mm x 359.4 mm x 35.5 mm
- Stand Adapter: Positive-action, break resistant, adjustable from 0 to 90 degrees, with standard 5/8 in. -27 thread
- Net weight:
- UA870 (A, KK, MB, MC, UC, X): 227 g
- UA870 (WB, USTV): 317 g
