Cisco Prisma II High Density Dual Reverse Optical .

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Data SheetCisco Prisma II High Density Dual Reverse OpticalReceivers The Cisco Prisma II optical network is an advanced transmission system designed tooptimize network architectures and increase reliability, scalability, and cost-effectiveness.The Prisma II High Density Dual Reverse Optical Receiver (HD-RXR) modules areavailable in the half-height High Density form factor.The HD-RXR modules contain two independent reverse optical receivers and two RF output ports.A single HD-RXR module occupies one slot in a Prisma II XD chassis. Two such modules can bevertically stacked in an associated Prisma II Host Module that occupies a single-wide slot in thePrisma II standard chassis. Up to 26 HD-RXR modules can operate in a standard 6RU chassis,*while up to 16 HD-RXR modules can operate in the Prisma II XD chassis.The ability to mix high density receivers with other Prisma II modules in the same chassis greatlyenhances the flexibility of the platform. HD-RXR modules are available in three versions: StandardGain, High Gain, and Low Noise.* The 56-connector version of the chassis is required to make use of all 4 receivers in one chassisslot.Figure 1.Cisco Prisma II High Density Dual Reverse Receiver (Left) and Populated Host Module (Right) 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 1 of 8

Data SheetFeatures Blind-mate (push-on) connections for RF, power, and data RF test points (one for each independent optical receiver) Adjustable RF output levels Optical automatic gain control Multiple setup and control options Local control via Local Craft Interface (LCI) and / or Intelligent Communications InterfaceModule (ICIM) Remote monitoring via ROSA / TNCS Master / Slave or Independent Mode RedundancyCalculating Reverse Receiver RF Output LevelUse the appropriate full link gain formula below together with the following procedures todetermine receiver (Rx) RF output level for design purposes.Receiver TypeFull Link Gain FormulaHigh Density Dual Low Noise Reverse Optical Receiver84 - mpeak (2 x Pin)HD-RXR - High Gain or Low Noise84 - mpeak (2 x Pin)1.Calculate the full link gain using the appropriate formula above, where: mpeak is the reverse transmitter single CW carrier RF input (drive) level, expressedin dBmV, that produces 100% peak OMI. Pin is the reverse receiver optical input power, expressed in dBm.The resulting full link gain is the gain of the link in dB from the reverse transmitter RFinput to the reverse receiver RF output, with receiver output attenuation set to minimum (0dB).2.Calculate the usable link gain as follows:a.b.3.Add the full link gain to the reverse transmitter maximum expected composite RFinput (drive) level to determine the maximum expected Rx composite RF output level.Determine if the maximum expected reverse Rx composite RF output level exceedsthe maximum RF output level specification.If it exceeds the maximum, calculate the amount of Rx RF attenuation (levelreduction in dB) required to prevent such occurrence. Then calculate the usable linkgain using the formula:Usable Link Gain Full Link Gain - Rx AttenuationIf it does not exceed the maximum, then the full link gain is equal to the usable linkgain (no Rx attenuation required).Calculate the receiver RF output level as follows: Rx RF Output Level Tx Design RF Input Level Usable Link GainThis formula yields the RF output level that can be used for reverse RF design in the headend orhub site where the receiver is located.Note:Many systems are designed for a common Rx RF output level by first calculating output level forthe link(s) with greatest optical loss. For links with lower optical loss, Rx RF attenuation is thenadded (2 dB for each dB lower optical link loss) to achieve the common Rx RF output level. 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 2 of 8

Data SheetUnderstanding Optical AGC RangeHigh Density Dual Reverse Receiver modules incorporate an optical automatic gain control (AGC)system that adjusts RF output attenuation to keep the output level constant as the optical inputpower level varies.Without optical AGC, the RF output of the optical receiver changes 2 dB for every 1 dB change inoptical input power. Given an RF output attenuation range of 26 dB, the optical AGC cancompensate for as much as 13 dB of change in optical input power. The distribution of this rangeabove and below the nominal optical input power level depends on the RF attenuation used toachieve the correct nominal RF output level.ExampleA High Density Dual Reverse Receiver produces 50 dBmV RF output for a nominal optical inputpower of -6 dBm. The design calls for 38 dBmV nominal RF output, so 12 dB of RF attenuation isapplied manually during setup to reduce the receiver RF output to 38 dBmV.This initial attenuation setting creates a margin of 12 dB for the optical AGC when keeping the RFoutput stable with falling optical input power. Because the RF output level changes 2 dB for every1 dB change in optical input power, the optical AGC in this case can correct for as much as 6 dBdrop in optical input power. It follows that the optical AGC can correct for as much as (13 – 6 ) 7dB rise in optical input power. 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 3 of 8

Data SheetProduct SpecificationsOptical SpecificationsTable 1.FeatureUnitsHD-RXR Standard Gainand High GainHD-RXR Low NoiseInput PowerdBm-17 to -8 (High Gain)-17 to 0 (Standard Gain)-25 to -10Wavelengthnm1290 to 16201290 to 1620Optical Return LossdB 30 30StandardStandardOptical Interface: SC/APCNotesElectrical SpecificationsTable 2.FeatureUnitsHD-RXR Standard Gainand High GainHD-RXR Low NoiseNotesRF BandwidthMHz5 to 905 to 90RF Output LeveldBmVUse RF output levelcalculations (see previoussection)Use RF output levelcalculations (see previoussection)Maximum RF Output LeveldBmV58 (Composite)58 (Composite)1RF Attenuation RangedB0 to 26 in 0.75 dB steps0 to 26 in 0.75 dB steps2Optical AGC RangedB13133Module ResponsivityA/W dB 299 (High Gain) 49.5 299 49.54A/W dB 67 (Standard Gain) 36.5RF Frequency ResponsedB 0.5 0.5RF Test PointdB-20 ( 1.0)-20 ( 1.0)Return LossdB 16 16TiltdB 0.5 to -0.5 0.5 to -0.5Noise Equivalent PowerpA Hz 8 (High Gain) 10 (Standard Gain) 2Power ConsumptionW DC 5 5Notes:1.Reverse receiver (Rx) maximum output level is determined using 5 to 42 MHz noiseloading while ensuring that the link Noise Power Ratio (NPR) dynamic range is not Rxlimited. Rx RF attenuation may be needed to avoid exceeding maximum Rx output levelin operation. See Calculating Reverse Receiver RF Output Level on page 2.2.RF Attenuation control: software control is via LCI, ICIM, or ROSA / TNCS.3.Optical AGC range above and below nominal optical input power is determined by theinitial RF attenuation setting. See Understanding Optical AGC Range on page 3.4.Module responsivity is measured at 1310 nm with 0 dB RF attenuation, and may changeat other wavelengths.Unless otherwise noted, specifications reflect typical performance and are referenced to theambient air temperature at the inlet to the Prisma II standard or Prisma II XD chassis.Specifications are based on measurements made according to SCTE/ANSI standards (whereapplicable), using standard frequency assignments. 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 4 of 8

Data SheetProduct Specifications, cont'd.Table 3.Environmental SpecificationsFeatureUnitsHD-RXR Standard Gainand High GainHD-RXR Low NoiseNotesTemperature Range, Full Specs& Operational C F0 to 50 32 to 1220 to 50 32 to 122Humidity Range%0 to 950 to 95*Notes* Recommended for use only in non-condensing environments.Table 4.Mechanical SpecificationsFeatureUnitsHD-RXR Standard Gainand High GainHD-RXR Low odule Widthslots11Unless otherwise noted, specifications reflect typical performance and are referenced to theambient air temperature at the inlet to the Prisma II standard or Prisma II XD chassis.Specifications are based on measurements made according to SCTE/ANSI standards (whereapplicable), using standard frequency assignments. 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 5 of 8

Data SheetOrdering InformationProduct Ordering MatrixTable 5.Ordering P2-HD-RXR-SA4012718P2-HD-LN-RXR-SA4040565 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 6 of 8

Data SheetFor More InformationPrisma II products include some of the industry's most complete range of high performance opticalcomponents. For more information, please refer to the appropriate data sheet(s) listed below.Component DescriptionData Sheet PartNumberPlatform739199Prisma II 1310 HDTx Transmitters7006768Prisma II Forward Optical Receivers70118871550 nm Transmitters7392011550 nm Optical Amplifiers739202Ancillary Modules739205BDR Digital Reverse 2:1 Multiplexing System744484 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Page 7 of 8

Data SheetService and SupportUsing the Cisco Lifecycle Services approach, Cisco and its partners provide a broad portfolio ofend-to-end services and support that can help increase your network's business value and returnon investment. This approach defines the minimum set of activities needed by technology and bynetwork complexity to help you successfully deploy and operate Cisco technologies and optimizetheir performance throughout the lifecycle of your network.For More InformationTo learn more about this product, contact your local account representative.To subscribe to receive end-of-life/end-of-sale information, go .html.Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. andother countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks.Third party trademarks mentioned are the property of their respective owners.The use of the word partner does not imply a partnership relationship between Cisco and any other company.(1009R)Specifications and product availability are subject to change without notice. 2007-2011 Cisco and/or its affiliates. All rights reserved.Cisco Systems, Inc.800 722-2009 or 678 277-1120www.cisco.com 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.Part Number 7011888 Rev CJuly 2011Page 8 of 8

Prisma II standard chassis. Up to 26 HD-RXR modules can operate in a standard 6RU chassis,* while up to 16 HD-RXR modules can operate in the Prisma II XD chassis. The ability to mix high density receivers with other Prisma II modules in the same chassis greatly enhances the flexibility of the platform.

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