Node Includes:
(1) Receiver PN: 717896
(1) Prisma Laser Transmitter PN: 736784 .25
(1) Digital Module: 712892
(1) Power Supply PN: 9330107
Description
The bdr Digital Reverse 4:1 Multiplexing System expands the functionality of the Scientific-Atlanta Model 6944, 6942, and 6940 Nodes by increasing the performance, reach, and efficiency of the reverse path transmissions.
At the node (transmit) end of the system, the 5 to 40 MHz or 7 to 42 MHz reverse path RF input signals from each of the node’s four ports are routed to a Digital Module in the housing lid. The Digital Module converts each signal to a baseband digital data stream and time division multiplexes the four streams into a single data stream. The data stream is split to enable routing for redundant optical transport. One (non-redundant application) or two (redundant application) Laser Modules installed in the housing lid convert the baseband data stream to an optical signal for transmission back to the headend or hub at either 1310 nm or 1550 nm wavelengths. ITU grid wavelengths are used for Dense Wave Division Multiplexing (DWDM) applications.
On the receive end, typically in a large hub or headend, Receiver Modules located in the Receive Processor frame receive the optical signal and perform conversion back to the baseband data stream. The Receive Processor demultiplexes the data stream and converts the four resultant data streams back to analog reverse path signals for routing to termination equipment. This equipment is housed in the Prisma II Chassis, the industry’s first carrierclass platform – providing unprecedented network reliability, equipment density, and high-performance functionality.
Features
· High-performance bdr digital reverse technology, 12-bit encoding enables transmission of analog video and high-order digital modulation signals (e.g.,16 QAM, 64 QAM, and 256 QAM)
· 4:1 time division multiplexing reduces requirements for costly 1550 nm ITU transmitters
· Long reach transmission capabilities eliminate need for optical amplifiers, reducing cost and space requirements
· Capable of sending 96 individual 5-42 MHz or 7-42 MHz reverse signals over a single fiber
· leverages 4:1 time division multiplexing for quadrupling fiber usage
· compatible with Scientific-Atlanta’s 24 wavelength DWDM system
· Flexible RF combining enables balancing of the reverse traffic from each of the four node ports
· 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
· High-speed remote control and monitoring via Scientific-Atlanta’s ROSA / TNCS system
Data Sheet
SA 6944 Digital Rev...
