ADC Telecommunications Inc. PSM7A7UD Manual Do Utilizador
Duplexer and Low Noise Amplifier
FlexWave Prism RF Modules for Prism Remote Units Installation Guide
Page 13
TECP-77-141 Issue 5 • 300001744178 Rev E • November 2013
© 2013 TE Connectivity Ltd.
Duplexer and Low Noise Amplifier
The RF Module provides the PRU with an internal Duplexer that is optimized to provide the
desired RF band‐pass filtering and in‐band equipment isolation between FWD and REV paths.
The Duplexer provides the filtering necessary to the transmit and receive paths to and from the
connected antenna.
The Duplexer for the Prism Remote Unit Single‐ and Dual‐Card RF Modules and the Dual‐Slot 40W
RF Modules contains up to two REV path Low Noise Amplifiers (LNA for PRI and/or SEC reverse
paths). Each LNA provides the Prism reverse path with nominal 30 dB REV gain and system NF of
5 dB per RX path.
The Duplexer for an HDM RF Module does not have a Low Noise Amplifier.
Duplexers are not field serviceable.
desired RF band‐pass filtering and in‐band equipment isolation between FWD and REV paths.
The Duplexer provides the filtering necessary to the transmit and receive paths to and from the
connected antenna.
The Duplexer for the Prism Remote Unit Single‐ and Dual‐Card RF Modules and the Dual‐Slot 40W
RF Modules contains up to two REV path Low Noise Amplifiers (LNA for PRI and/or SEC reverse
paths). Each LNA provides the Prism reverse path with nominal 30 dB REV gain and system NF of
5 dB per RX path.
The Duplexer for an HDM RF Module does not have a Low Noise Amplifier.
Duplexers are not field serviceable.
Linear Power Amplifiers
The Linear Power Amplifier (LPA) is a high quality broadband RF amplifier used for achieving
Prism product‐rated power for the PRU Tx forward path spectrum RF. The PAs are pass‐band
specific, with the maximum composite Tx power levels, and >10 dB instantaneous peak power
rating listed in:
Prism product‐rated power for the PRU Tx forward path spectrum RF. The PAs are pass‐band
specific, with the maximum composite Tx power levels, and >10 dB instantaneous peak power
rating listed in:
•
for Single‐Card, Dual‐Card, and HDM RF Modules
•
for Dual‐Slot 40W RF Modules.
The LPA is housed within the RF Module, and is not field serviceable.
Table 5. LPA Maximum Composite Tx Power Levels for Single‐Card, Dual‐Card, and HDM RF Modules
Passband
Maximum
dBm
Watts
Instantaneous
Bandwidth
(MHz)
(MHz)
AWS 2100
+43
20
45
Cellular 850
+43
20
25
+46
40
25
EGSM 900
+40
10
35
DCS 1800
+42
15.8
75
LTE 700 Lower ABC
+43
20
18
+46
40
18
LTE 700 Upper C
+43
20
10
+46
40
10
PCS 1900
+43
20
70
PGSM 900
+40
10
25
SMR 800
+38
6.5
18
SMR 900
+38
6.5
5
UMTS 2100
+42
15.8
60