ADC RF Wofx, User Manual

Page: 7 / 22

ADCP-61-813 • Issue 2 • February 2005
Page 1
© 2005, ADC Telecommunications, Inc.
1 GENERAL
The Automatic Redundant Switch, RDS-AS ( Figure 1 ), a member of the RF Worx family of
products, provides monitoring and redundant backup to Cable TV systems.
The RDS-AS constantly monitors the channel A RF input of ports 1 and 2 and will detect a drop
in signal strength to channel A. When this occurs, the RDS-AS immediately switches to back-
up channel B in order to provide an acceptable signal level to the system. The RDS-AS will
continue to monitor channel A and will switch the signal back when acceptable signal levels
have been restored.
The RDS-AS is designed for use in 19-inch equipment racks. All RF signal connections to the
switch are made through standard 75-Ohm BNC or F-connectors on the rear panel. All
operating controls and indicators are on the front panel.
Figure 1. Automatic Redundant Switch (RDS-AS)
1.1 Graphical User Interface - “SWatch” Switch Monitoring Software (Optional)
A SWatch GUI software for the RDS-AS can be purchased separately from ADC
Telecommunications. The program provides continuous remote monitoring of the RDS-AS and
associated systems. It is designed for Windows 95 systems with a 90 MHz (or faster) Pentium
Processor.
2 DESCRIPTION
The RDS-AS functions as an electronic A/B switch. This provides redundancy to amplifiers or
receivers used anywhere in the cable TV network.
Figure 2 shows a typical Dual A/B switch
configuration.
Note: The system watches to make sure that an acceptable signal has been received for a
full 15 seconds before returning to channel A.
OPER
ATIN
G
CALIB
RATIO
N
NOR
MAL
SWIT
CHIN
G
THRE
SHO
LD
(-R)
B
A
MAN
UAL
FAIL
URE
SELECT
SELECT
STATUS
12213-A
2A 240V
V: 38.4
–57.6
VDC/100/120/240
VA
C
Ø: 1
A: 1A MAX DC / 2A MAX A
C
HZ: 47
–63 HZ
UR