UA870 (Discontinued)UHF Active Directional Antenna
Note: UA870X is still available in the U.S., but all other variations are discontinued. Please see UA874, which replaces UA870.
UHF Active Directional Antenna for U4S, U4D, ULXP, ULXS, UR4S and UR4D Receivers or UA844 or UA845 Antenna Distribution Systems. See specifications for frequency ranges per individual model.
The Shure UA870 is an active UHF wireless directional antenna. It features a log periodic dipole array. When compared to an omnidirectional 1/2-wave antenna, the cardioid pattern provided by the UA870 offers enhanced reception of the desired coverage area and greater rejection of RF signals outside the coverage area.
To compensate for coaxial cable signal loss, the UA870 has an on-board amplifier that offers user selectable 3 or 10 dB gain. The gain setting is indicated by two LEDs. Remote 12 Vdc power for the antenna amplifier is provided by a Shure U4S, U4D, ULXP, ULXS, UR4S and UR4D Receiver or a Shure UA845 or UA844 Antenna Distribution System through the connecting coaxial cable.
The UA870 can be mounted on a microphone stand, suspended from the ceiling, or mounted to a wall using the integrated swivel adapter bracket. The UA870 is weather resistant for use outdoors. For best diversity performance, use two UA870 antennas.
RF Frequency Range
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 . . . . . . . . . . . . . . . . . . . . . . 944-952MHz *
* Available in U.S.
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)
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, UB, X): 8.90 in. (226 mm) H X 9.21 in. (234 mm) W X 1.60 in. (40.7 mm) D
UA870 (WB, USTV): 12.45 in. (316.2 mm) H X 14.15 in. (359.4 mm) W X 1.40 in. (35.5 mm) D
Stand Adapter
Positive-action, break resistant, adjustable from 0 to 90 degrees,
with standard 5/8 in. -27 thread
Net Weight (without cable)
UA870 (A, KK, MB, MC, UB, X): 8 oz. (227 grams)
UA870 (WB, USTV): 11.2 oz (317 grams)
CERTIFICATION
The Shure Model UA870 UHF Active Directional Antenna meet the essential requirements of the European R&TTE Directive 99/5/EC and is eligible to carry the CE marking. Meets Requirements of EMC Standard EN 301 489 Parts 1 and 9.
| User Guides | Language | File Size |
|---|---|---|
| UA870 User Guide | English, French, German, Italian, Spanish | 229 (kb) |
