Installation and Operating Manual
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OVERVIEW:
The BDA-LTE/LABC-33/33-90-AB assembly enhances the coverage area of radio
communications in buildings and RF shielded environments.
The BDA-LTE/LABC-33/33-90-AB has dual RF paths (Forward / Reverse) to improve
coverage in two distinct frequency bands.
The unit features low noise figure and wide dynamic range. It is based on a dual
duplexed path configuration with sharp out of band attenuation allowing improved
isolation between the receiving and transmitting paths.
OPERATIONALDESCRIPTION:
The BDA-LTE/LABC-33/33-90-R3U15 Downlink path receives RF signals from the
base station, amplifies the signal and transmits the signal into a Distributed Antenna
System at the direction of the mobiles. The signal travels over a DAS medium that
then dissipates the signal to the Mobile subscribers. The BDA-LTE/LABC-33/33-90-
AB Uplink path receives RF signals at the Mobile side from the DAS system, then
amplifies it, and transmits the amplified signal to the base station. The Uplink and
Downlink occupy two distinct dedicated frequency bands, each Uplink and Downlink
band is 18MHz wide.
For LTE Lower A, B and C Band, the frequency allocations are as follows:
Uplink: 698-716 MHz
Downlink: 728-746 MHz
Four diplexers isolate the paths and route each signal to the proper amplifying
channel.
An Automatic Level Control (ALC) allows for output power limiting. A variable step
attenuator gives 0 – 30 dB of attenuation in 2 dB steps. The use of these controls is
covered in the “OPERATION” section, later in this document.