Issue; Functional Description - ADC ClearGain Dual Inline Tower Mounted Amplifier System User Manual

ADCP-75-214 • Issue 2 • September 2006
1.2

Functional Description

The basic purpose of a ClearGain Dual Inline TMA system is to amplify the uplink signal just
after the antenna. This is done to compensate for the loss in signal strength that occurs in
passage of the signal through the coaxial cable to the Base Transceiver Station (BTS) at the base
of the tower. The ClearGain TMA system improves the performance of the BTS by providing
12dB of uplink (reverse path) gain with a low noise figure. The ClearGain TMA system
provides visual and dry contact output alarming and lightning protection.
the system components are involved in system function.
COAXIAL
CABLE
Page 2
© 2006, ADC Telecommunications, Inc.
ANTENNA
BASE
STATION
RF SIGNALS
DC POWER
FAULT DETECTION
BTS ANT
Bias-T kit
Freq: 800 - 2200MHz
Temp: -40 to +65 C
ASSEMBLED IN
Input: 5 to 24VDC
KOREA
Max Current: 2A
Date: YYYY/MM/DD P/N: 1344027
S/N: XXXXXXXXX
DC
RX/TX (A)
GROUND
RX/TX (B)
Figure 2. System Function
COAXIAL CABLE
TO ANTENNA
ANT A
ClearGain
BTS A
JUMPER
CABLES
SITE
POWER
ALARM
ClearGain PDU
G W
B R
MHU
- + NO COM NC FAIL G A B
INPUT ALARM RS485 CONNECT
DC POWER
FAULT DETECTION
Figure 2 depicts how
ANT B
MHU
BTS B
OK OK OK
MHU 1 MHU 2 MHU 3
21305-B