Item Frequency Range Output Power Specifications Down link 851 ~ 866 MHz Up link 806 ~ 821 MHz Down link +12dBm/Total Up link +12dBm/Total Down link Gain 65 dB Up link Down link Shutdown level +14dBm/Total Up link Down link ALC Range 25dB Up link Ripple < 7dB Propagation Delay < 1us Noise Figure < 7dB VSWR < 1.8 : 1 P1dB +24 dBm Output IP3 +40 dBm Frequency Stability ≤ ±0.1.3 Description This product is designed for offices, hotel rooms, small parking lots, garages or small buildings, helping to improve communications signal and coverage by extending the coverage of a base station. Outdoor antenna receives from a base station, then USHR-800NIH bi-directional amplifier amplifies the signal. After amplification, the signal is passed through to the indoor antennas. Conversely, signals from handsets are amplified and retransmitted to the base station. 2. Installation 2.
2.4 Before Installation You will need to determine the following before beginning the USHR-800NIH installation: a. b. c. d. e. Base station location Location where the outdoor antenna is to be installed Location where the indoor antenna is to be installed Location where the USHR-800NIH is to be installed Length and type of coaxial cable needed to connect from the outdoor antenna to the bi-directional amplifier unit f.
2.6.1 Turn-On Procedure Verify all RF connectors are tightened and cables and antennas are secured. Connect AC/DC Adaptor on the bi-directional amplifier’s DC IN connector. Turn on the Power Switch. The Power indicator LED should be green. Make sure that no other LED is illuminated. If any other LED is lit, consult the trouble shooting page of this manual, or “2.6.2 Antenna Isolation and Alignment” section. 2.6.2 Antenna Isolation and Alignment USHR-800NIH is equipped with an over drive protection circuit.
TO BASE TO MOBILE POWER TX FAIL RX FAIL ON OFF DC IN 8
2.8 Installation Example USHR-800NIH can be installed with multiple indoor antennas as shown in Figure 2-8. In this example, a 6-way power splitter was used to split the signal to and from the indoor antennas. 3. Operation 3.1 Introduction This section provides information for operating the USHR-800NIH bi-directional amplifier. 3.2 Operating Instruction 3.2.1 Power-up Connect the bi-directional amplifier to AC/DC Adaptor. Turn on Power Switch.
3.2.2 Fail Status 3.2.2.1 Overdrive Fail There is one overdrive fail on the unit, for the up link. Over driving occurs when the RF output power of the bi-directional amplifier exceeds a prescribed limit. This means that the input RF power level is too high, or the bi-directional amplifier is oscillating. The condition may be transient, caused by a passing emergency vehicle emitting a strong signal for example, or permanent, due to a nearby base station.
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