Cisco EDR 85 System: Modules for Cisco GainMaker and GS7000 Data Sheet

The Cisco^®Enhanced Digital Return (EDR) 85 System expands the functionality of Cisco GS7000 and Cisco GainMaker^® Nodes by increasing the performance, reach, and efficiency of the reverse path transmissions.

The Cisco EDR 85 System includes EDR Transmitter modules that install in GainMaker and GS7000 Nodes, and companion Cisco Prisma^® high-density (HD) EDR PRX85 Receiver modules that install in a Prisma II or Prisma II XD chassis at the headend or hub. The transmitter and receiver use Small Form Factor Pluggable (SFP) optical pluggable modules (OPMs) for enhanced flexibility. The Cisco EDR 85 System operates over the 5-85 MHz range and supports all standard reverse frequency bandwidths at 40, 42, 55, 65, and 85 MHz.

At the transmit (node) end of the system, reverse-path RF input signals from each node port are routed to an EDR 2:1 or EDR 1:1Transmitter module in the housing lid. The transmitter module converts each signal to a baseband digital data stream and combines the signals into a serial data stream using time-division multiplexing (TDM). The baseband data stream is then converted to an optical signal for transmission to the headend or hub. The double-wide (2:1) transmitter modules occupy two transmitter slots and the 1:1 modules occupy one slot. The EDR 2:1 Transmitter is available for the GS7000 and GainMaker (4-Port or Reverse Segmentable) platforms (Figure 1). The EDR 1:1 Transmitter is available for the GS7000 and all GainMaker Node platforms (Figure 1). The transmitter OPMs are available in either Coarse Wavelength Division Multiplexing (CWDM) 1270-1610 nm wavelengths or Dense Wavelength Division Multiplexing (DWDM) ITU channels (17-61 nm).

At the receive end, typically in a large hub or headend, the EDR Receiver module receives the optical signal and performs the conversion back to the baseband data stream. The resulting data streams are converted back to analog reverse path signals for routing to termination equipment. The EDR Receiver module is available in the High Density form factor. The receiver OPMs are available in Standard Range (SR) and Extended Range (XR) configurations. Both configurations feature a dual LC/PC optical input connector that feeds two independent reverse optical receivers, each with its own RF output port.

A single EDR Receiver module (Figure 2) occupies one slot in a Cisco Prisma II XD chassis. Two EDR HD receiver modules can be vertically stacked in an associated Prisma II Host Module that occupies a single-wide slot in the Prisma II standard chassis. Up to 26 HD modules can operate in a standard 6 rack unit (6RU) chassis (the 56-connector version of the chassis is required to make use of both receivers in one chassis slot). Up to 16 HD modules can operate in the Prisma II XD chassis. The ability to mix EDR Receiver modules with other Prisma II HD modules in the same chassis greatly enhances the flexibility of the platform.

Features

●   High-performance digital reverse technology:

◦     12-bit encoding that enables transmission of analog video in the reverse band

◦     High-order digital modulation signals (for example,16 quadrature amplitude modulation [QAM], 64 QAM, and 256 QAM)

●   Multiple operating modes in the EDR receiver that support the EDR transmitter and the older integrated 2:1 bdr node transmitter

●   Optical pluggable modules that provide flexible inventory management

●   Long-reach transmission capabilities that eliminate the need for optical amplifiers, reducing cost and space requirements

●   Capability to send 90 individual 5-85 MHz reverse signals over a single fiber:

◦     Use of 2:1 multiplexing to reduce fiber usage

◦     Compatibility with Cisco’s 45-wavelength DWDM system

●   Support for independent balancing of reverse traffic at EDR receiver RF ports

●   Simplified setup that reduces installation time and expertise requirements

●   Distance- and temperature-independent link performance that simplifies engineering and maintenance requirements

●   Space-saving, high-density deployment in Prisma II or Prisma II XD chassis to increase deployment cost-efficiency

●   Optional monitoring of node (GS7000) and transmitter (GS7000 and GainMaker) parameters available at the receiver

Block Diagrams

Figures 3 and 4 provide block diagrams of the EDR systems for 2:1 and 1:1 transmission.

Figures 5 and 6 show block diagrams for EDR 2:1 and 1:1Transmitters in a GS7000 node. Figures 7 and 8 provide block diagrams for EDR 2:1 and 1:1 transmitters in a GainMaker node.

Product Specifications

Table 1 lists specifications for the EDR 85 Transmitter modules. Table 2 gives specifications for the EDR Receiver module. Table 3 lists RF link performance specifications.

Table 1.       Cisco EDR 85 Transmitter Modules

Table 2.       Cisco EDR 85 PRX85 Receiver Module

Note:      

Table 3.       RF Link Performance

Notes:

Tables 4 and 5 provide group delay and optical link specifications. Figure 9 shows noise power ratio (NPR) performance.

Table 4.       Group Delay, 1-MHz Bandwidth

Table 5.       Optical Link Characteristics

Notes:

Notes:

Ordering Information

Figure 10 provides ordering matrixes for the Cisco EDR 85 System components. Tables 7, 8, and 9 list part numbers for Cisco Prisma EDR required equipment, additional required equipment, and accessories.

Transmitter 2:1 Optical Pluggable Module (OPM) Order Matrix

Transmitter 1:1 Optical Pluggable Module (OPM) Order Matrix

Table 6.       DWDM and CWDM Wavelengths

Table 7.       Cisco Prisma EDR Required Equipment

Table 8.       Additional Required Equipment

Table 9.       Accessories

Service and Support

Using the Cisco Lifecycle Services approach, Cisco and its partners provide a broad portfolio of end-to-end services and support that can help increase your network's business value and return on investment. This approach defines the minimum set of activities needed by technology and by network complexity to help you successfully deploy and operate Cisco technologies and optimize their performance throughout the lifecycle of your network.

Contact:

Cisco Systems, Inc.

1 800 722-2009 or 678 277-1120

www.cisco.com

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