ADC ClearGain Tower-Mounted Amplifiers User Manual
ClearGain® Tower-Mounted Amplifiers
Americas
SPEC SHEET
As mobile usage continues to increase, service providers are faced with the challenge of optimizing
and expanding their wireless networks to provide new and existing services. ADC’s ClearGain®
Tower-Mounted Amplifiers (TMAs) minimize the cost of network expansion and improve quality of
service, allowing service providers to increase profitability from new and existing services.
The ClearGain TMAs improve signal quality by boosting the uplink signal of a mobile system to
increase receiver performance and improve overall coverage.
Features:
Provides amplification of the Band
•
Highly advanced LNA amplifies RX signal for improved receiver performance
•
and increase in coverage
Dual duplex feature reduces the number of feeder cable runs by providing simultaneous
•
operation of TX and RX with low TX loss
Full Band feature provides amplification of the entire band
•
Advanced filtering maintains the lowest possible noise figure for improved quality of service
•
Slim, stackable design conserves tower space and reduces tower-related costs
•
Seamless aluminum sleeve construction protects components from the elements
•
Modular system is fully compatible with all base stations
•
Power and alarming for up to six masthead units is provided from a single unit at the base station
•
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ClearGain® Tower-Mounted Amplifiers
+ INPUT
NO COM NC
ALARM
MHU
DISCONNECT
Power Distribution Unit
MHU1 MHU2 MHU3 MHU4 MHU5 MHU6
Base
Station
ClearGain™
TMA
ANT
BTS
Bias-T
BTS
Antenna
BTS
Americas
®
Tower-Mounted Amplifiers
ClearGain
Introduction
Unacceptable network quality is one of the main
reasons for mobile subscriber churn. With industry
churn 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
ClearGain Tower-Mounted Amplifiers help provide
this improvement in signal quality.
TMAs improve signal quality by boosting the
uplink (RX) signal of a mobile system immediately
after the antenna. This compensates 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, make longer calls,
and successfully complete
calls in an expanded
geographic area, resulting
in increased revenue.
System Overview
The ClearGain TMA system is modular, consisting
of a Masthead Unit (MHU), a Power Distribution
Unit (PDU) and a Bias-T Unit. This system provides
full compatibility with all base stations. The
ClearGain MHU offers dual duplex operation and
incorporates a highly advanced fixed-gain, lownoise amplifier (LNA) and high-performance filters
for added reliability. The MHU amplifies each band
to maximize signal quality and optimize coverage.
The ClearGain MHU features a slim, lightweight
design. This allows two ClearGain TMAs to
be mounted with one set of brackets thereby,
conserving valuable and costly tower space
and reducing clutter on the tower. The TMA
is protected with a strong, aluminum sleeve
construction designed to ensure superior weather
protection and resistance to corrosion, resulting in
increased reliability.
In the ClearGain TMA system, DC power is
supplied to the MHU from a ClearGain PDU. The
PDU also provides alarming and monitoring of the
feeder cable and up to six MHUs from a single
unit. The flexible design of the ClearGain PDU
allows it to be rack- or wall-mounted on the side
of a BTS cabinet.
An external Bias-T Unit is used in conjunction
with the ClearGain PDU. The Bias-T inserts DC
power onto the coaxial cable and extracts alarm
and monitoring signals from the coaxial cable.
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2
ClearGain® Tower-Mounted Amplifiers
Americas
DD800 Full Band Typical Specifications
ELECTRICAL
Nominal Impedance of RF Inputs and Outputs:
Frequency Range:
TX: 869-894 MHz
RX: 824-849 MHz
Passband (RX)
Gain: 12 dB
Noise Figure: 1.5 dB
Dynamic Range
Input at 1 dB Gain Compression: 0 dBm
IIP3: +13 dBm
Max Input Power: +10 dBm
851 MHz Rejection: <30 dB
Bypass Insertion Loss: 2.0 dB
Isolation in Tx Path: 80 dB
Rejection 1850-1998 MHz: 80 dB
Insertion Loss of TX Path (TX to Antenna):
Passband Return Loss
TX Band: >18 dB
RX Band: >18 dB
Intermodulation:
Maximum Input Power (RMS Power):
Tx Rejection in Rx Band:
-120 dBm
500 W
40 dB
50 Ohm
0.4 dB
®
Tower-Mounted Amplifiers
ClearGain
POWER
Operational Voltage:
Operational Current:
PHYSICAL
Dimensions (HxWxD):
Weight:
Color:
Housing:
CONNECTORS
Antenna Connector:
BTS Connector:
ENVIRONMENTAL
Operating Temperature:
Lightning Protection:
Vibration
Storage: ETS3019-1-1
Transport: ETS3019-1-2
Operation: ETS3019-1-3
REGULATORY
EMC:
APPROVALS
FCC:
UL:
6.3 kg (13.9 lbs.)
Silver
ETS300 342-2
Part 15, Class A
1950
7 to 15 Vdc
140 ±10 mA
332 mm x 250 mm x 84 mm
Aluminum
7/16 DIN female
7/16 DIN female
-40°C to +60°C
IEC 61000-4-5
QUALITY
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MTBF:
900,000 hours
3
ClearGain® Tower-Mounted Amplifiers
Americas
DD800 B-Band Typical Specifications
ELECTRICAL
Nominal Impedance of RF Inputs and Outputs:
Frequency Range:
TX: 880-894 MHz
RX: 835-849 MHz
Passband (RX)
Gain: 12 dB
Noise Figure: 1.7 dB
Dynamic Range
Input at 1 dB Gain Compression: 0 dBm
IIP3: +13 dBm
Max Input Power: +10 dBm
Antenna Isolation 851-869 MHz: >35 dB
Bypass Insertion Loss: 2.0 dB
Isolation in Tx Path: 80 dB
Rejection 1850-1998 MHz: 80 dB
Insertion Loss of TX Path (TX to Antenna):
Passband Return Loss
TX Band: >18 dB
RX Band: >18 dB
Intermodulation:
Maximum Input Power (RMS Power):
Tx Rejection in Rx Band:
-120 dBm
500 W
40 dB
50 Ohm
0.4 dB
®
Tower-Mounted Amplifiers
ClearGain
8 / 0 7 • 1 0 5 1 8 7 A E
POWER
Operational Voltage:
Operational Current:
Alarm Current Level:
PHYSICAL
Dimensions (HxWxD):
(13 in x 9.8 in x 3.3 in)
Weight:
Color:
Housing:
CONNECTORS
Antenna Connector:
BTS Connector:
ENVIRONMENTAL
Operating Temperature:
Lightning Protection:
Vibration
Storage:
Transport:
Operation:
REGULATORY
EMC:
APPROVALS
FCC:
UL:
QUALITY
MTBF:
6.3 kg (13.9 lb)
Silver
ETS300 342-2
Part 15, Class A
1950
900,000 hours
7 to 20 Vdc
140 ±10 mA
350 ± 10 mA
332 mm x 250 mm x 84 mm
Aluminum
7/16 DIN female
7/16 DIN female
-40° to +60° C
IEC 61000-4-5
ETS3019-1-1
ETS3019-1-2
ETS3019-1-4
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