User Manual

FCC ID: QQRBSMR1W60
BDA OVERVIEW:
The BDA assembly extends the coverage area of radio communications in
buildings and RF shielded environments.
The unit features low noise figure and wide dynamic range. It is based on a
duplexed path configuration with sharp out of band attenuation allowing improved
isolation between the receiving and transmitting paths.
BDA BLOCK DIAGRAM DESCRIPTION:
Refer to figure 1 for the following discussion.
The BDA Downlink path receives RF signals from the base station and amplifies
and transmits them to the subscriber. The BDA Uplink path receives RF signals
from the subscriber and amplifies and transmits them to the base station. The
Uplink and Downlink occupy two distinct frequency bands; 806-821 MHz for the
Uplink and 851-866 MHz for the Downlink. Two diplexers isolate the paths and
route each signal to the proper amplifying channel.
A selectable Automatic Level Control (ALC) allows for output power limiting. A
Manual Gain Control (MGC) provides continuous control of amplifier gain. The
use of these controls is covered in the “OPERATION” section, later in this
document.
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