Motorola SG 2000 Instrucciones de operaciones Pagina 17

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8 Overview
AT&T SLW2500 Installation and Operation Manual
SG2-LR Receiver
The receiver module, SG2-LR, is designed specifically for high performance in the SLW2500.
The SG2-LR receiver uses an integrated optical-hybrid photo-detector for improved RF
performance over the entire 54 MHz through 870 MHz passband.
Figure 2-6 illustrates a functional block diagram of the SG2-LR receiver:
Figure 2-6
SG2-LR receiver functional diagram
Module
enable
RF
output
Optical
input
Hybrid current
sense signal
(10V/A)
Hybrid current
test point
(1.0 V/A)
Optical power
sense signal
(1 V/mW)
Optical power
test point
(1 V/mW)
Module
enabled
Module
fault
Threshold
comparators
Optical power
monitor
Threshold
comparators
Optical receiver hybrid
Matching
network
Module enable
logic
Hybrid current
monitor
+24V
Low
Normal
High
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