Cisco Model 6944 and 6940 Node bdr Dig Rev 2 1 Mux System for Prisma II Data Sheet
Description
The Prisma II
™ “carrier-class” platform supports Scientific-Atlanta’s
revolutionary bdr™ digital reverse technology. The Prisma II bdr™
Digital Reverse 2:1 Dual Multiplexing System includes a unique
approach for incorporating cost-effective network redundancy as
well as saving space and cost.
At the transmit end of the system, typically in a hub or remote
terminal, four 5 to 42 MHz analog reverse path signals are input to
a two slot wide Transmit Processor. The Transmit Processor
converts each RF signal to its own baseband digital reverse stream.
The data streams are paired and multiplexed together, resulting in
two high data rate streams, one for each pair of inputs. Laser
modules installed within the Transmit Processor Frame convert the
high data rate stream to an optical signal for transmission at either
1310 nm or 1550 nm wavelengths. 1550 nm ITU grid wavelengths are used for Dense Wave Division Multiplexing
(DWDM) applications.
On the receive end, typically in a large hub or headend, two Receiver Modules located in the Receive Processor
frame receive the optical signal and perform conversion back to the baseband data stream. The Receive
Processor de-multiplexes the data stream and converts the resultant data streams back to analog reverse path
signals for routing to termination equipment.
Digital Reverse 2:1 Dual Multiplexing System includes a unique
approach for incorporating cost-effective network redundancy as
well as saving space and cost.
At the transmit end of the system, typically in a hub or remote
terminal, four 5 to 42 MHz analog reverse path signals are input to
a two slot wide Transmit Processor. The Transmit Processor
converts each RF signal to its own baseband digital reverse stream.
The data streams are paired and multiplexed together, resulting in
two high data rate streams, one for each pair of inputs. Laser
modules installed within the Transmit Processor Frame convert the
high data rate stream to an optical signal for transmission at either
1310 nm or 1550 nm wavelengths. 1550 nm ITU grid wavelengths are used for Dense Wave Division Multiplexing
(DWDM) applications.
On the receive end, typically in a large hub or headend, two Receiver Modules located in the Receive Processor
frame receive the optical signal and perform conversion back to the baseband data stream. The Receive
Processor de-multiplexes the data stream and converts the resultant data streams back to analog reverse path
signals for routing to termination equipment.
Features
• High-performance baseband digital reverse technology with 12-bit encoding enables transmission of analog
video and high-order digital modulation signals (e.g., 16 QAM, 64 QAM and 256 QAM)
• High Density deployment of two 2:1 digitally multiplexed 5-42 MHz reverse signals
• 2:1 time division multiplexing reduces requirements for costly 1550 nm ITU transmitters by 50%
• Long reach transmission capabilities eliminate need for optical amplifiers, reducing cost and space
requirements
• Capable of sending 48 individual 5-42 MHz reverse signals over a single fiber
-leverages 2:1 time division multiplexing for doubling fiber usage
-compatible with Scientific-Atlanta’s 24 wavelength DWDM system
-compatible with Scientific-Atlanta’s 24 wavelength DWDM system
• Unique sub-module design provides functions for full path redundancy and dense product packaging in
Prisma II platform
• Simplified set-up reduces installation time and expertise requirements
• Distance and temperature independent link performance simplifies engineering and maintenance requirements
• Space-saving, high-density deployment in Prisma II platform increases deployment cost efficiency
• Extended temperature performance enables Remote Terminal applications
• High-speed remote control and monitoring via Scientific-Atlanta’s Transmission Network Control System
(TNCS)
Optoelectronics
Prisma II
™
bdr
™
Digital Reverse
2:1 Dual Multiplexing System for
High Density Installations
High Density Installations