User manual: CXE880 Fibre node
Contents
1. Figure 4 CXE880 front panel 1 Integrated optical receiver 2 OLC mode jumper 3 Optical power DC voltage test point 4 LED indicator for optical input power 5 Midstage attenuator 6 Slope selection jumper 7 Output diplex filter 8 Output test point 20 dB directional coupler 9 RF output port 10 Return path attenuator OLC mode jumper Fig 3 pos 2 Off Return path attenuation mode jumper Fig 4 pos 11 0 dB 16 dB 11 Return path attenuation mode jumper 12 Remote powering jumper for output 13 OMI test point 14 Integrated optical transmitter 15 LED indicator for optical output power 16 Ambient light sensor for lid status optional status monitoring board 17 LED indicator for alarm status optional status monitoring board Slope selection jumper Fig 3 pos 6 Sloped 8 dB Flat Remote powering jumper Fig 4 pos 12 On Off Figure 5 Jumper configurations 59300277 Rev 003 17 12 2012 8 12 Features Forward path Optical receiver The optical receiver is integrated within the CXE880 and will accept both 1310 and 1550 nm wavelength optical inputs The optical receiver provides both LED indicator and DC voltage test point for received optical power to quickly determine status of the unit The output stage uses a GaAs MESFET output amplifier to improve RF performance over the entire 85 to 1006 MHz passband Optical input power Optical input pow2. User Manual CXE880 59300277 Rev 003 17 12 2012 1 12 CXX Series User Manual Teleste Corporation CXE880 Fibre node Contents 59300277 Rev 003 17 12 2012 2 12 Je Ve Ulea e o EE 3 JE Ed ON corrida 3 ELE C0 E runa det de E ai de E EY 3 PONCIANO aeaee rated sia RS Cr e ane eons rene 3 Status monitoring card optional 4 Ia ie 5 Fibre AS laos OS OND DRDS A RO iaa 5 se A A 7 HEES 8 Forward path Optical receiver occcccccccccccncccccncconnncnononononnnonnnnnnnnnnnnonnnononenonos 8 Return path Optical transmitters eee 11 Legal deciarations oo En aaa 12 Introduction Installation Housing Powering 59300277 Rev 003 17 12 2012 3 12 The CXE880 is a fibre deep optical node with high performance characteristics It is designed for cases where high performance and cost effectiveness are a demand Requirements of future networks like 1 GHz frequency band and 85 108 MHz return split are taken in account The node is based on fixed receiver and transmitter The use of an integrated optical receiver and transmitter eliminates time consuming mounting of connectors and fibre splicing inside the housing The optical receiver supports light wavelengths from 1290 nm to 1600 nm Alignment of this product is made easy and no external plugs are needed Fibre connectors are situated at the housing wall enabling quick installation The OLC Optical Level Control as well as gain and slope ad
3. contents of this document are provided as is Except as required by applicable law no warranties of any kind either express or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose are made in relation to the accuracy reliability or contents of this document Teleste reserves the right to revise this document or withdraw it at any time without notice Ce Teleste Corporation P O Box 323 FI 20101 Turku FINLAND www teleste com
4. er can be measured from the optical power DC voltage test point Figure 4 pos 3 The test point DC voltage is directly proportional to optical input power in mW e g 10 V corresponds to 1 0 mW average optical power for 1310 nm Table below shows the correct measurements at the test point using a 1310 nm or 1550 nm transmitter Operating wavelength 1310 nm Operating wavelength 1550 nm TP V DC Input dBm TP V DC Input dBm 10 0 o 0 11 2 0 7 9 4 eg A 6 3 2 5 0 3 4 0 4 3 2 5 25 pl 28 6 2 0 7 Table 1 CXE880 optical receiver expected levels Do not connect any voltage to the test point or short circuit it to ground Use a voltage meter with an input resistance higher than 100 kQ 99300277 Rev 003 17 12 2012 9 12 The mainboard provides also a LED indicator Figure 4 pos 4 which gives a visual indication of the optical input power Optical power LED Condition Yellow Optical input power is below 7 dBm Optical input power is within the nominal range Green 7 0 dBm Red Optical input power exceeds 0 dBm Table 2 LED indicator for optical input power on CXE880 Forward path adjustment The following are instructions to be used for a normal adjustment procedure 1 Do not connect fibres or apply power before all the adjustments described below have been made Test the optical input power present on the fibre service cable using an optical power meter The CXE880 integrated optical input power range is
5. from 7 dBm to 0 dBm Optical Level Control OLC circuitry provides gain control that compensates for changes in input level caused by external variations The available gain reserve is factory set for optimum operation If needed the output level can be adjusted with the midstage attenuator You can however set an internal jumper Figure 4 pos 2 to disable the OLC This enables you to operate the CXE880 optical receiver at full gain for applications that do not require gain stabilization Use the midstage attenuator to get wanted output level The network plan should specify exact signal levels Refer to the Table 3 or Table 4 Output level without OLC dBuV Midstage attenuator dB 118 117 116 115 114 113 O17 BR NM O Table 3 Midstage attenuator selection when input power is 3 dBm at 4 OMI 59300277 Rev 003 17 12 2012 10 12 Output level with OLC dBuV Midstage attenuator dB 114 0 113 1 112 2 111 3 110 4 109 5 Table 4 Midstage attenuator selection when input power is between 0 7 dBm at 4 OMI Use the response mode jumper Figure 4 pos 6 to select the midstage slope Available options are flat or 8 dB sloped Apply the power Connect the fibre connector to the bulkhead adapter 99300277 Rev 003 17 12 2012 11 12 Return path Optical transmitters A diplex filter Figure 4 pos 7 is selected during configuration according to the preferred frequency split T
6. from it e When using a digital noise like signal the spectrum analyser s noise marker is adjusted to the same bandwidth as the digital signal has and the level is adjusted to the value shown in the unit s label or calculated from it The mainboard provides also a LED indicator Figure 4 pos 15 which gives a visual indication of the laser bias current Geh Condition Yellow Laser bias current is below the nominal range Green The laser diode bias current is OK Red Laser bias current exceeds the nominal range Table 5 LED indicator for optical output power on CXE880 99300277 Rev 003 17 12 2012 12 12 Legal declarations Copyright 2010 2012 Teleste Corporation All rights reserved TELESTE is a registered trademark of Teleste Corporation Other product and service marks are property of their respective owners This document is protected by copyright laws Unauthorized distribution or reproduction of this document is strictly prohibited Teleste reserves the right to make changes to any of the products described in this document without notice and all specifications are subject to change without notice Current product specifications are stated in the latest versions of detailed product specifications To the maximum extent permitted by applicable law under no circumstances shall Teleste be responsible for any loss of data or income or any special incidental consequential or indirect damages howsoever caused The
7. he CXE880 platform can be equipped either with a 1310 nm Fabry Perot transmitter or with a CWDM transmitter The CWDM lasers deploy eight wavelengths in range of 1470 1610 nm Return path adjustments The return transmitter is aligned in production eliminating the need for any user adjustments The level of return signal can be measured from the optical transmitter s OMI test point Figure 4 pos 13 In shielding cover of the CXE880 is described the fixed RF driving level at the OMI test point that gives 10 OMI The return signal level should be adjusted to match this level Table below shows the RF drive levels for different OMIs The signal level is adjusted with the return path attenuator Figure 4 pos 10 The adjustment range is 15 dB The attenuation can be approximately doubled with the return path attenuation mode jumper Figure 4 pos 11 Thus it is possible to achieve higher attenuation with a maximum amount of 31 dB OMI RF drive level dBuV from OMI test point 12 56 6 10 default value 55 0 8 53 1 6 50 6 4 47 0 For other OMI values the needed adjustment setting can be calculated from the formula Drive level 55 dBuV 20 x log OMI wanted 10 Depending on the nature of the return signal the input level can be measured as follows e When using a reference or test signal the level of the carrier signal is measured from the test point and it is adjusted to a value shown in the unit s label or calculated
8. justments use electrical controls that improve the reliability of the node Optional status monitoring card is factory installed and transmits status information using 10 7 MHz data link to e g HDO203 data receiver Data link works with up to 32 combined CXE880 return path signals The fibre optic receiver can be installed either into a street cabinet or to a sheltered outdoor environment Note Fibre adapter is not waterproof The amplifier should be installed in a vertical position so that the external cable connectors are underneath At least 100 mm of free space should be left above the amplifier to ensure sufficient cooling air circulation The cover of the housing is closed by a single bolt Tighten the bolt with a 4 mm Allen key Final tightening torque should be 2 5 3 5 Nm Before closing the lid ensure that nothing is trapped between the lid and the case all case gaskets are in their correct positions lid seats evenly on the rubber gasket The class of enclosure is IP43 when correctly installed and tightened To ground the amplifier housing connect at least 4 mm grounding wire Cu from a proper earth to the grounding point The supply voltage of the remote powered amplifier 26 65 V AC or 30 90 V DC can be fed through the RF output port Figure 4 pos 9 Make sure the remote powering jumper Figure 4 pos 12 is in correct position for remote powering Refer to Figure 4 External power can also be fed through the a
9. mplifier into the network by moving remote powering jumper to ON position Maximum feed through current is 2 A The power intake of the remote powered amplifier may also be done externally via the cable feed through that is located on the upper right corner of the amplifier see Figure 1 The protective fuse is located on the left hand side of the power supply board 59300277 Rev 003 17 12 2012 4 12 8907016 Figure 1 Remote cable connector The locally powered CXE880 fibre node is connected to the main voltage of 165 255 V AC via its own power cord The power supply is double shielded and does not require separate grounding However the amplifier housing has to be grounded from the grounding point The supply voltage fuse T3 15 A 250 V is located on the upper right corner of the amplifier underneath the remote cable connector Figure 1 Status monitoring card optional When equipped with an optional status monitoring card the node continuously monitors internal temperature local and remote supply voltages optical input power laser current lid status and statistics of power failures Measurement results and status information is transmitted using 10 7 MHz FSK data link to e g HDO203 data receiver The two first mentioned parameter statuses are also indicated with the LED indicator Figure 4 pos 17 The following table further describes behaviour of the LED During the power up sequence the LED will display yello
10. provides termination splicing and storage functions for fibre cables The shielding cover of the node provides a protective enclosure for optical fibres and components Warning The SC APC adapter is connected to the integrated fibre receiver through a short length of fibre on the rear side of the bulkhead To avoid 59300277 Rev 003 17 12 2012 6 12 damage to the fibre take care not to rotate the adapter when installing or removing the fibre connector Cleaning fibre connectors For correct optical operation ensure that all optical connectors are cleaned immediately before mating using a suitable optical connector cleaning kit If a cleaning kit is not available wipe the end of the connector using pure isopropyl alcohol 99 and a lint free wipe Dry it with filtered compressed air Wait until dry to insert connector into the adapter When fibre optic connectors are unmated the optical fibre end faces must be protected from contamination using suitable dust caps Contamination of fibre end faces will reduce the performance of the optical fibre and could ultimately cause failure of the system Contamination could also damage the fibre end faces when the connectors are mated TELESTE Front panel 99300277 17 12 2012 l TP 1 10 V mW User Manual mid CXE880 Rev 003 7 12 8912057 D 8 dB E e slope gt TELESTE output TP 20 dB OMI 55 dByV 10 input TP 10 dE 58800222 002
11. w light for a short period of time to indicate that the LED is functional The LED blinking indicates that packets are sent on the FSK link Status monitoring Description LED on CXE880 Green No alarms Internal temperature exceeds 75 C or local supply Yellow voltage is not between 11 13 V Internal error in status monitoring card Does not ea affect node operation For more information on data sent on FSK link and its representation see HDO230 user manual Interfaces Fibre installation 59300277 Rev 003 17 12 2012 5 12 Underneath the CXE880 fibre receiver are two optical fibre ports with fibre adapters and one RF output port with F female connector The coaxial output has a standard PG11 thread and they accept any KDC type adapter or connector The length of centre conductor is illustrated in Figure 3 8912065 Figure 2 CXE880 Fibre Optic Receiver 1 Optical fibre input port 2 Ground 3 Optical fibre output port 4 RF output port 8905010 260 280 mm gt a Es gt mm Maximum Figure 3 Centre conductor length The CXE880 fibre optic receiver and transmitter come as standard with a bulkhead mounted SC APC adapter Fibre installation is a critical procedure and it should be done carefully Incorrect handling of the fibre can result in damage and degraded performance The node contains an internal fibre organiser The fibre organiser
Download Pdf Manuals
Related Search