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ClearGain
®
Tower-Mounted Amplifier
2
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Introduction
Unacceptable network quality is one of the
main reasons for mobile subscriber churn. With
industry churn rates at their current rates, a
service provider’s entire customer base could
be lost in as few as three years. The cost of
acquiring new subscribers to replace the existing
customer base can be enormous. Improvements
in quality of service can directly impact a service
provider’s profitability through the cost savings
associated with increased subscriber retention
and the additional revenue gained from increased
billable minutes of use resulting from improved
signal quality.
While subscribers are willing to pay a premium
for data services, improved quality of service is
necessary to provide new data services. Due to
the tradeoff between bit rate and bandwidth
inherent to data services, improved signal
quality is required to achieve the same level of
performance at even higher data rates. ADC’s
tower-mounted amplifiers (TMAs) help provide
this improvement in signal quality.
The main purpose of a TMA is to boost the
uplink (RX) signal of a mobile system immediately
after the antenna, thereby compensating for
the loss in signal strength that occurs when
the signal is passed through the coaxial feeder
cable to the base transceiver station (BTS) at
the base of the tower. ClearGain TMAs perform
this amplification with the lowest possible noise
contribution, resulting in a substantial increase
in receiver performance and an improvement in
overall coverage. These improvements in quality
of service allow mobile subscribers to place more
calls, longer calls, and successfully complete calls
in an expanded geographic area, resulting in
increased revenue.
ClearGain
®
Tower-Mounted Amplifier
Europe, Middle East, Africa
+ -
INPUT
NO COM NC
ALARM
MHU
DISCONNECT
Power Distribution Unit
MHU1 MHU2 MHU3 MHU4 MHU5 MHU6
Base
Station
Tower-
Mounted
Amplifier
ANT
BTS
Bias-T
ANT
BTS