ADC RF Wofx, User Manual

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ADCP-61-813 • Issue 2 • February 2005
Page 2
© 2005, ADC Telecommunications, Inc.
A typical application would protect two optical-to-RF receivers. In this configuration, the RDS-
AS can independently protect one or two pairs of receivers or amplifiers. If there are two pairs,
individual thresholds can be established for each pair, and once the RDS-AS detects a signal
level falling below threshold, it will switch from A to B for that particular pair. All status
conditions for each pair of receivers are available locally and remotely via the SWatch switch
monitoring software.
Figure 2. Block Diagram for Dual A/B Switch Mode Operation
2.1 Atypical Configuration
Figure 3 details a split system on the A side, with one receiver carrying the lower-frequency
CATV signals and the other receiver carrying the higher CATV signals. On the B side, only one
system is used to carry the combined lower/higher frequency CATV signals. It should be noted
that the RDS-AS will not provide satisfactory results in the above configuration. It is
recommended that systems with this configuration use the ADC Split Linked A/B Switch
(RDS-SLAB) product.
REDUNDANT
FIBER OPTIC
TRANSPORT
SYSTEM
RF
OUTPUT
#1
RF
OUTPUT
#2
RF
RDS-2 A A
B B
RF
PRIMARY
TRANSCEIVER/
AMP
PRIMARY
TRANSCEIVER/
AMP
PORT 1 PORT 2
MICROPROCESSOR
CONTROL
COMPUTER
MONITOR &
ALARM
SYSTEM
STANDBY
TRANSCEIVER/
AMP
STANDBY
TRANSCEIVER/
AMP
10137-B