Compact Nodes and 90071

Transcription

1 Fiber ptics Compact Nodes and Dedicated ptimized Nodes The receiver node is designed for long distance trunk applications to feed architectures of any density. Dual output with enhanced intermodulation performance and flatness enables operators to cascade more amplifiers at the end of the system. The distribution node is ideally suited for system upgrades to help operators push fiber deeper into the network to increase bandwidth in support of interactive applications. The node is developed to serve at different levels and tasks in a HFC-network and can be connected directly to the subscriber s tap network. ne or two end-of-line amplifiers (line extenders) may be cascaded after the node. The dual node features two high-level distribution outputs. Redundant ptical Input Both nodes can be equipped with a second optical input receiver module. Configured for redundancy, this enables route diversity. In the event of fiber break, the signal will be routed through an alternative fiber path (e.g. in a ring structure). This will improve the network s uptime. The routing/switching operation will be conducted automatically by the node itself and monitored by TNCS, Transmission Network Control System, which is Scientific-Atlanta s element management system. TNCS, Transmission Network Control System Both nodes can be remotely monitored and controlled by TNCS via the plug-in Compact Transponder option. Which is available in a SMC version or in a HMS version. The fully frequency agile Compact Transponder allows monitoring and control of a large number of parameters in the nodes. TNCS improves overall network reliability and provides faster fault detection. Reverse Switch Ingress Locating Support The nodes have a unique support tool for locating ingress sources; a 3-State Reverse Switch in each individual node output. The switch is remotely controlled via TNCS. By switching the individual switches to detection mode, it can be observed from which output the ingress derives. Then, the decision to switch off this part totally may be taken. Automatic Level Control The nodes feature an automatic microprocessor controlled output level control. This ensures a constant output level independently of changing optical input levels e.g. by redundant switching, additional fiber splices, and other fiber handling that affects the attenuation. Unlike conventional designs, this automatic level control operates without pilot tones. Features 862 MHz node platform optimized for trunk or distribution applications to feed architectures of any density Full two-way communication Redundancy for the forward and/or reverse path Reverse path segmentation ptional status monitoring and control for enhanced reliability

2 Description, cont d Reverse Segmentation or Redundancy Both nodes allows reverse path segmentation which makes it possible to increase the capacity in the reverse path. Reverse segmentation means that both output ports have their own individual reverse transmitter. In the end this means fewer subscribers per output and more reverse capacity per subscriber. This could be very important e.g. in the event of many Internet subscribers. Alternatively, the second reverse transmitter may be used as redundant transmitter in the event of a fiber break in one of the reverse fibers. This feature is controlled via TNCS. Finally, if one of the reverse transmitters should fail itself, the full load will automatically (if set up) be switched to the other transmitter to obtain continuous operation. Standard delivery set up for the nodes is full load to both transmitters and 0 db switch attenuation. This set up may be changed remotely via TNCS or locally with the Handheld Programmer Terminal Dual Ingress Filter Both nodes are equipped with a socket designed to a plug-in Dual Ingress High Pass Filter if this proves necessary on specific node locations. If no filter is required, the socket is just left open. Compact Design Developed in a compact design, the nodes are mounted outdoor in pedestal or mounting cabinets. They can also be mounted indoor without cabinets. All fiber and coaxial cable entries are on the base of the housing for easy connection, typically for underground cabling. Reverse Signal Injection If insertion of a reverse signal is needed, this can be done from one of the node s output ports. A plug-in link type is mounted instead of a diplex filter, and the reverse signal to insert is connected to the output port. The port used for reverse insertion cannot be used for simultaneous forward (downstream) transmission. The advantage of inserting a reverse signal as described is that the entire reverse frequency range MHz of the reverse transmitter may be utilized. 2

3 Presentation, Fiber Node and Power supply fuse (2A for 230V) (5A for line powering) AC terminal (max. 10A) for line powering receiver 1&2 Type as primary and redundant. Reverse test point -20 db for 9004x -10 db for 9008x Control Port To setup the node and for software download The terminal can be connected here Level adjust To adjust output level L..D. to indicate No AGC (yellow) Rx1 (green/yellow/red) Rx2 (green/yellow/red) Reference level set To programme the receiver Reverse transmitter Fabry-Perot Type 90046: old version Type dbm DFB Type 90048: old version Type dbm Type dbm Control Port Level adjust Ref. level set RX2 RX1 AGC RX1 RTX1 RTX2 RX2 Fixings (3 pcs. in total) R1 Power supply 230V (2AT) 65V (5AT) R2 1 TNCS Module 10AT 1 & 2 Terminal for earthing -2 2 R1-20dB 10AT Fuses (reversible) To select AC path R1 & R2 R mm dB Voltage lock-out Type is only used in power supplies for line powering DC Voltage indicator qualizer (interstage) 862 MHz: Type db Type db Type db Type db link Attenuator ut 2 Type xx. xx is the attenuation in db Transponder Type SMC-version Type HMS-version Reverse Attenuator Type xx. xx is the attenuation in db Diplex filter Type xxxx. If the reverse path is not used insert a 0 db link type Reverse filter Autolink (0 db) if no filter is used Test point forward path -20 db directional coupled Block Diagram, Fiber Node and V AC AC or DC in DC DC qualizer Splitter RF switch µp Ref. level set Level adjust LD Alarms RTx 1 RTx 2 Rev. 2 Rev. 1 Compact Transponder (-40 db) -20 db 9004x -10 db 9008x Rev switch -48 db rel. out 2 HP filter or auto link -20 db Att. Att. Att. -20 db pt in Node setup pt. reverse out ut 2 ut 1 3

4 Compact Fiber Node and Specifications ptical Fiber node type Units Notes Application Trunk Distribution Input ptical wavelength nm ptical input level dbm 5.5 AGC range 1310 nm dbm -4.5 to to Input noise current, below 750 MHz pahz utput Frequency range, reverse/forward MHz / Split frequencies with plug-in diplex filters MHz MHz 30/45, 42/54 55/75, or 65/87 Reverse attenuation from output to db 9.3 reverse transmitter Number of outputs 2 outputs utput level dbµv 2 x Main outputs dbµv 2 x 98 2 Main output dbµv 2 x CTB db 66 4 CTB db 60 5 CS db 62 4 CS db 60 5 Level flatness db < ± 0.5 < ± 0.9 utput level slope db equalizer, max. 6 equalizers 6 Alarms DC supply voltage Green LD Reduced received power Yellow LD No AGC Yellow LD No optical signal Red LD Connectors ptical connector Depending on adapter RF connector PG 11(5/8" reduction incl.) Test points F-female General Specifications Supply voltage V AC, DC, 230 AC Power consumption *) W AC loop-through A 7 Hum modulation dbc -65 Screening db 85 perating temperature C -15 to +55 Mechanical Housing Die-cast, Silumin Dimensions: H x W x D m 255 x 250 x 125 (measured with fittings) When opened, the node requires a minimum space of 300 mm in width. 4

5 Specifications, cont`d Notes: 1. AGC ranges for optical modulation index 5% Type utput level dbµv AGC range dbm 1310 nm and m= 5% to to to to to to +5.5 AGC range dbm 1550 nm and m= 3% -4.0 to to to to to to ) ptical input -4.5 to dbm, m = 5%. 3) ptical input -6.0 to dbm, m = 5%. 4) 42 channels CNLC, m = 5%, Pin max. 1.5 dbm, measured without plug-in equalize System specifications including transmitter at MI = 5% 5) As 4) but measured with 9 db plug-in equalizer 6) A pre-equalization value in should not exceed 6 db since this will reduce the C/N performance at low frequencies. Pre-equalizing the trunk receiver will not improve system CTB/CS performance because the total system performance is determined by the transmitter only rdering Information Description Part Number ptical Node, 862 MHz, 230 V AC A ptical Node, 862 MHz, V AC A ptical Node, 862 MHz, 230 V AC A ptical Node, 862 MHz, V AC A TNCS Interface ptical Input Receiver Modules 1 st receiver nd receiver to be ordered separately redundant TNCS Monitorable Parameters Power supply DC voltage + Power supply AC coax line voltage + ptical input power, both receivers + utput level + Temperature + TNCS Controllable Parameters utput level, offset from initial level + Reverse transmitters on/off + 3-State Reverse switch 0, -6 db, off + Switch between reverse transmitters + Alarms via TNCS and Locally Local Alarms via LD s No optical input level + Low optical input level, adjustable + ptical level K + AGC out of range + Reverse transmitter ageing + Reverse laser failure + 5

6 Required and ptional Accessories This page contains ordering information for required and optional accessories. Please consult with your Scientific-Atlanta sales representative to determine the best configuration for your particular application. The following Required Accessories must be ordered separately: Required Accessories Pads (attenuators) - available in 1.0 db steps from 0 to 20 db 1 required for forward attenuation 2 required for reverse attenuation qualizer - 1 required, chose from below: 1 required for equalization 1 required for link (0dB) Diplex Filter - 2 required, chose from below: 2 required for forward and reverse splitting Reverse Transmitter; chose from below: 1 required for reverse transmission 2 required for redundant or segmented reverse transmission ptical Adapter - up to 4 adapters are required; 1 for each optical connection. Internal optical connector is SC/APC, chose from below: Adapter SC/APC to 2108 Adapter SC/APC to FC/APC Adapter SC/APC to SC/APC The following ptional Accessories must be ordered separately: ptional Accessories optical receiver for redundant forward operation Voltage Lock-ut Module, 24 or 35 V * Dual Ingress Blocking Filter Compact Transponder HMS Compact Transponder Handheld Terminal *The 35 V Lock-ut Part Number A xx A xx A A xxyy A9008x.10yyyy A9008x.10yyyy A A A Part Number A A xx A xxxx A A A Complete part numbers are available in separate datasheets Scientific-Atlanta and the Scientific-Atlanta logo are registered trademarks of Scientific-Atlanta, Inc. Specifications and product availability are subject to change without notice Scientific-Atlanta, Inc. All rights reserved. urope & Asia or North America or Part Number A Rev January