Home
ViaLite DVB-T Link User Manual
Contents
1. Fibre Optic Link User Manual LRx D HB 4 CR2874 14 04 11 Pulse Power amp Measurement Ltd 65 Shrivenham Hundred Business Park Watchfield Swindon Wiltshire SN68TY UK Tel 44 0 1793 784389 Fax 44 0 1793 784391 Email sales ppm co uk www vialite co uk PPM LTD 2011 PPM LTD 2011 Instrument Care and Safety Information Please read the whole of this section before using your ViaLite product It contains important safety information and will enable you to get the most out of your link Electrical Safety The ViaLite 19 Rack Case power supply units are Safety Class 1 products having a metal case that is directly connected to earth via the power supply cable When operating the equipment note the following Hazardous voltages exist within the equipment There are no user serviceable parts inside and the covers should only be removed by suitably qualified personnel e The equipment does not have an isolating switch on the mains inlets Equipment must be installed within easy reach of a clearly labelled dual pole mains isolation switch e Make sure that only fuses of the required rated current and of the specified type anti surge quick blow etc are used for replacement Optical Safety The ViaLite RF DVB T Transmitter modules contain laser diode sources operating at 1310nm nominal These devices are rated at under EN60825 1 Safety of Laser Produc
2. RLL Output Voltage 7 75V for a gain of OdB and reduces by 0 125V per dB of RF link loss due to losses in the optical path 16 PPM LTD 2011 2 5 Module Formats 35 5mm o oo 128 4mm 175mm Plug in Module OEM Module 17 PPM LTD 2011 2 6 Alarms amp Monitoring 2 6 1 Module Alarm Output The circuit below shows how the alarm output should be configured for all types of ViaLite module The switch to the left of the dotted line is internal to the module The circuitry to the right of the dotted line is provided by the system user In the presence of an alarm condition the module will act as a high impedance node and will NOT sink current This is a fail safe system in that an alarm condition will be raised when a module is not present This is an important factor when commissioning link management systems as blank module positions will register module faults Internal to External to module module Pull Up Resistor Alarm Ground This circuitry 15 also provided by the Redundancy Switch module and the Alarm Concentrator module When either of these modules are used the alarm outputs cannot be considered VOLT FREE This is because the Redundancy Switch module and the Alarm Concentrator modules use the same module alarm outputs to detect whether a unit has failed When these modules are used a voltage of between 5V and 12V may be present on the Alarm outp
3. in order to minimise insertion loss The optical connectors used in PPM s systems maintain their performance even after hundreds of matings as long as they are kept clean Dirt or contamination may result in the core being obscured or misaligned and this in turn results in high insertion loss and poor link performance The following precautions should be taken to maintain the performance of your link e The cable connectors should always be cleaned before they are used even if they have been protected by dust caps When the fibre optic cables are not connected it is essential that the cable and module connectors be protected by the dust caps provided with the system 2 2 2 Connector and Cable Types ViaLite RF DVB T modules use single mode 8um 125um fibre terminated with FC APC optical connectors Cross site cables are available in standard 3mm diameter and heavy duty 8mm diameter variants FC APC is an industry standard for angle polished optical connectors and must not be confused with standard FC PC connectors The two connector types are not interchangeable and mating one with the other will damage both the cross site interconnect and the module 2 2 Connecting and Disconnecting The cable connectors should be cleaned before every connection see 2 2 4 To connect FC APC optical connectors align the centre ferrule on the cable connector with the female receptacle in the module There is a lug on the side of the
4. ferrule which must align to the gap in the receptacle When they are in alignment push the plug gently home and finger tighten the knurled collet onto the receptacle See Figure 1 below To disconnect FC APC connectors unscrew the knurled collet on the plug and gently withdraw the plug Replace the dustcaps on both the receptacle and the cable connector 12 PPM LTD 2011 Figure 1 a showing FC APC connector with dust cap removed b showing alignment of the lug on the side of the ferrule which must match the gap in the receptacle shroud before gently pushing the plug home and finger tighten the knurled collet nut onto the threaded receptacle 2 2 4 Care and Cleaning The cleaning kit provided should be used in conjunction with the instructions for cleaning prior to initial installation and initial use Each dry wipe card and receptacle cleaning stick should only be used once and then discarded Additional cleaning materials can be purchased from PPM The cable optical connectors should then be cleaned before every use even where they have been protected with dust caps If the cables have become excessively dirty and satisfactory operation cannot be achieved using dry wipe cleaning the following cleaning process should be employed Cleaning items required e Lint free fibre industrial cleaning tissue e Reagent grade Isopropyl Alcohol IPA e Air duster Cable Connector Cleaning Dampen a patch of cleaning tissue w
5. LNA feed and options to route a user fed LNA voltage through PIN 14 of the rear 15 way D sub Connector details shown below It is not possible to route a user fed LNA voltage through PIN 14 of the rear 15 way D sub Connector on any modules that have been purchased with internally generated LNA feeds PPM LTD 2011 Module Series DVB T Link D Series UHF DVB T 200 900 MHz 1 6 Care of fibre optic connectors Fibre optic connectors are more sensitive to damage and contamination than electrical connectors are In order to maintain full performance from your fibre optic link system it is necessary to take care to protect the connectors from damage and to keep them clean The cable connectors should always be cleaned before they are used even if they have been protected by dust caps A cleaning kit is provided with the equipment for this purpose When the fibre optic cables are not connected it is essential that the cable and module connectors be protected by the dust caps provided with the system Failure to do so may result in damage to the fibre ends which are critical to the system performance Please refer to section 2 2 for fibre optic cable handling and cleaning instructions 10 PPM LTD 2011 2 Setting up and Understanding the Link Please read fully document Lxx HB for information on installing your ViaLite equipment before commissioning your RF link system 2 1 Module Operation The DVB T fibre optic link mod
6. bre are given in the ViaLite System Handbook Lxx HB 14 PPM LTD 2011 2 3 Using the Transmitter Module 2 3 1 Connecting the Transmitter Module Connect the transmitter to the power supply the fibre optic cross site cable and the RF DVB T signal as described in section 2 1 The RF input signal applied to the BNC Signal Connector should be within the maximum and minimum signal levels given in the specifications in section 3 CAUTION On some modules there is 12Vdc connected to the RF co axial input to provide power to masthead amplifier The transmitter module should be turned off when connecting to the masthead amplifier and antenna 2 3 20 Front Panel Indicators The transmitter has two front panel LEDs to indicate the module status Power LED Status LED Standard Ext Power Feed Standard Ext Power version option version Feed option OFF Unit is Off Unit is Off Unit is Off Unit is Off Internal Fault Internal Fault Laser Failure Laser Failure Or DC Feed current limit 2 3 3 Alarm Output When the plug in transmitter module is fitted in an LRK 19 Rack Case an open collector alarm output is available via the LRK backplane alarm concentrator connector There are two monitor outputs for each module position on the LRK alarm concentrator connector ALMnA Open collector output Indicates laser failure OR DC Feed over current ALMnC Analogue monitor is not used on the RF DVB T Transmitter n indicates module positio
7. csssssnscsesssssnsccessssnnecsesssen 15 2 4 Using 16 25 Module 17 0 Alaras 18 3 TECHNICAL SPECIFICATIONS csssscsssossssoscossnssssscsssvsssncosseees 20 4 MAINTENANCE AND FAULT FINDING GUIDE 21 s PRODUCT WARRANTY 22 PPM LTD 2011 1 Introduction 1 1 ViaLite DVB T Fibre Optic Link PPM s ViaLite DVB T Fibre Optic Link provides a high reliability transparent cross site connection between in UHF TV band Using optical fibre and a DVB T antenna suitably positioned for reception from a local transmitter a set top box and TV can be up to 30km from the antenna The position and information on the local DVB T transmitter stations can be obtained at the Digital TV Group website http www dtg org uk retailer coverage html EX rane ViaLtte POWER Q or IS ES a L LI stat UHF DVB T 470 860MHz Optical Tx IM INE IM ISP IMP ISP INED IM SS LES LIS LES The wide dynamic range of the link results in negligible degradation of the DVB T broadcast due to noise or interfering signals The use of optical fibre has a number of advantages over conventional coaxial alternatives Low signal loss enabling a long link with n
8. d will maintain them for a period of three years from the date of shipment at no cost to the customer Extended warranty options are available at the time of purchase Please note that the customer is responsible for shipping costs to return the unit to PPM The Company or its agents will maintain its products in full working order and make all necessary adjustments and parts replacements during the Company s normal working hours provided that the Customer will pay at the rates currently charged by the Company for any replacements made necessary by accident misuse neglect wilful act or default or any cause other than normal use Claims must be made promptly and during the guarantee period IMPORTANT Please contact both your selling agent and PPM prior to returning any goods for Warranty or Non Warranty repairs Goods will not be accepted without a valid Goods Return Number GRN 22 PPM LTD 2011 ViaLite RF DVB T FIBRE OPTIC LINK HANDBOOK LRX D HB ISSUE 4 CR 2874 PULSE POWER amp MEASUREMENT LTD 2011 NO PART OF THIS DOCUMENT MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM WITHOUT PRIOR WRITTEN PERMISSION PPM LTD 65 SHRIVENHAM HUNDRED BUSINESS PARK SWINDON SN6 8TY UK TEL 44 1793 784389 FAX 44 1793 784391 EMAIL SALES 9 PPM CO UK WEBSITE WWW VIALITE COM
9. down converted to UHF and fed to the optical transmitter module through a 75Q cable The signal is converted to an RF modulated optical signal by the laser and associated circuitry The light travels through optical fibre to the receiver module where it is converted back to an RF signal by the detector diode The broadcast signal is then fed to the transmission receiver by a 75 2 cable PPM LTD 2011 1 4 DVB T Antenna Installation For the DVB T reception configuration a DVB T antenna part number 51215 and a kit part number 51214 consisting of a masthead amplifier 15M of RG59 cable with two 750 and two connectors are available The antenna should be located in a position with good visibility of a DVB T broadcast transmitter Information on local transmitter stations can be found on the Digital TV Group website referred to in section 1 1 The masthead amplifier should be located close to the antenna with approximately 1M of RG59 cable A length of not more than 3M should connect the amplifier to the fibre optic transmitter using the connectors provided At the receiver end of the optic fibre link a short length of RG59 connects to the DVB T box using the connectors provided 1 5 LNA Feed In the majority of applications this product will be used to extend the range of coaxial cable In some cases the coaxial cable is used to power a low noise amplifier and or downconverter Since the fibre has no electrical conductivity the opt
10. egligible attenuation of the signal e Lightweight highly flexible and small diameter cable e Frequency response independent of the path length Immune to electromagnetic interference e Provides electrical 1solation PPM s ViaLite DVB T product offers particular advantages Full DVB T broadcast band coverage e Operation up to 30km e Compact plug in module up to 8 in 19 chassis e Shielded module option for use in high levels of electrical interference or over a wide operating temperature range Wide dynamic range for negligible signal degradation e Front panel status LEDs and rear panel alarm outputs laser status received light level e External mast head LNA PPM LTD 2011 1 2 Part Numbers This handbook covers the following RF DVB T modules L H T D 3 6 R 05 1310 Transmitters only zem uen DFB options 1310 1310x20nm 1550 1550x20nm CWDM options LRT Transmitter 1470 1470 3 LRR Receiver Pan 1490 14903nm 1510 1510 Transmitters Transmitters only 1530 1530 3 Rack Module 05 15dB Gain user LNA feed DFB Laser 1550 1550 3 Module 25 15dB Gain 12V LNA feed CWDM 1570 1570 3 Receivers 1590 1590 3nm D1 DVB T RF 50ohm SMA 05 15dB Gain 1610 1610 3nm D3 DVB T RF 75ohm BNC Not available in OEM format Refer to the ViaLite System Handbook for further details on the following ViaLite items Part Number Desc
11. ical transmitter has been designed to provide voltage feed at the head end of the link near the antenna amplifier Modules are available with two LNA options The first recommended for DVB T reception from fixed broadcast transmitters has a 5V or 12V 80mA feed built into the transmitter module This is designed to operate with the UHF masthead amplifier supplied by PPM but will operate with a number of popular masthead units Please contact PPM for suitability The second option recommended for complex systems such as reception of downconverted signals from COFDM radio cameras does not supply a voltage but facilitates connection of any supply voltage up to 36V to the rear panel This voltage will then be transferred to the RF input to the transmitter for powering low noise blocks The maximum current for this arrangement is 350mA The equipment is protected with a thermal fuse information in this section refers to fibre optic transmitter modules only LNA voltages are fed out through the RF input connector on the Tx modules OEM Modules Modules in this range DO NOT offer an internally generated LNA feed voltage Some modules do offer an ability to route a user fed LNA voltage through PIN 13 on the 14 way header details shown below When using PPM Outdoor Enclosure external LNA feed is available via the outdoor enclosure motherboard Plug In Modules Depending on bandwidth there are options for internally generated 5V or 12V
12. ith IPA and clean all surfaces of the plug ferrule e Using a dry cleaning tissue dry the ferrule and polish the end face e Using the air duster blow away all residues from the end of the connector Module Female Receptacle Cleaning only recommended if problems are being experienced e Twist a cleaning tissue to form a stiff probe and moisten with IPA Gently push the probe into the receptacle and twist around several times to dislodge any dirt e Repeat the above process with a dry tissue e Using the air duster blow away all residues from the receptacle 13 PPM LTD 2011 Important Notes is flammable Follow appropriate precautions and local guidelines when handling and storing IPA e be harmful if spilt on skin Use appropriate protection when handling e It should only be necessary to clean the female receptacles on the modules if problems are being experienced e Never inspect an optical fibre or connector with the naked eye or an instrument unless you are convinced that there is no optical radiation being emitted by the fibre Remove all power sources to the module and isolate the optical fibres 2 2 5 Minimum Bend Radius Because the optical fibre is made of glass it 1s important not to subject it to a tight bend radius For this reason the fibre has a minimum bend radius MBR specification beyond which the cable cannot be bent without excessive loss or damage occurring MBR specifications for PPM fi
13. n 1 to 8 The open collector alarm output sinks current in the absence of an alarm condition When an alarm occurs the output goes into a high impedance state Refer to section 2 6 for details of the alarm interface 15 PPM LTD 2011 2 4 Using the Receiver Module 2 4 1 Connecting the Receiver Module Connect the receiver to the power source fibre optic cross site cable and RF signal as described in section 2 1 2 4 2 Front Panel Indicators The transmitter has two front panel LEDs to indicate the module status Power LED Signal LED or Unit Off Unit Off RED Internal Fault Low light Optical loss gt 20dB The Low Light alarm is triggered when the light level at the receiver is below a preset limit This threshold is set to be 20dB optical less than the nominal system gain 2 4 3 Alarm and Monitor Output When the plug in receiver module is fitted in an LRK 19 rack chassis an open collector alarm output and a monitor output are available via the LRK backplane alarm concentrator connector There are two alarm outputs for each module position on the LRK alarm concentrator connector ALMnA open collector output Low received light level ALMnC Analogue Received Light Level voltage The open collector alarm output sinks current in the absence of an alarm condition When an alarm occurs the output goes into a high impedance state Refer to section 2 6 for details of the alarm interface
14. onnector Use with other types may compromise system performance Operating Temperature Rack plug in module 0 C to 40 C Shielded remote module 20 C to 50 C Storage Temperature 40 C to 70 C Optical Characteristics Wavelength 1310 20nm Fibre Single mode 9 125 Corning SMF28 or equivalent All parameters are specified after a 15minute warm up 20 PPM LTD 2011 4 Maintenance and Fault Finding Guide Refer to the following table that gives a list of commonly encountered problems and suggested solutions Power LED does not light Power source not connected Connect power source on Plug in module when plugged into Converter Module not plugged fully into Plug module in fully Sleeve Converter Sleeve Power LED lights up RED External LNA feed is in current Check the masthead amplifier and limit RF cable for a short circuit Status LED lights up RED Tx Laser Failure Return to local PPM office Rx Low optical level Clean the optical connectors Check optical link for breaks and No optical signal the connections for tight bend radii etc The ViaLite range of RF DVB T Transmit and Receive Modules are precision engineered and calibrated for optimum performance and accuracy before dispatch However in the event of any problems or queries arising about the equipment please contact PPM or your local agent 21 PPM LTD 2011 gt Product Warranty The Company guarantees its products an
15. ription LRKIS Case for Desktop or 19 rack installation Accommodates up to 8 plug in modules and 2 mains power supplies LRK2S Sub rack for 19 rack installation Accommodates up to 8 plug in modules and 2 mains power supplies LPS M Main Power Supply plug in for LRK1S or LRK2S FC APC Patch lead 2 8mm jacket Length defined in metres by x 1m 2m 5m 10m PPM LTD 2011 1 3 System Description 1 3 1 DVB T Reception Masthead LNA DVB T Antenna Optic Fibre Receiver ViaLite LRR D3 6R 05 Optic Fibre Transmitter ViaLite DVB T Box LRT D3 6R 25 H1310 The optic fibre link operates as follows The DVB T broadcast signal from the TV antenna is amplified by the masthead amplifier and fed to the optical transmitter module through a 750 cable The signal is converted to an RF modulated optical signal by the laser and associated circuitry The light travels through optical fibre to the receiver module where it is converted back to an RF signal by the detector diode The broadcast signal is then fed to the DVB T receiver by a 750 cable PPM LTD 2011 1 3 2 Broadcast Transmission Link Camera Radio Link ASI Receiver Downconverter Optic Fibre Cable Link HF Cable Optic Fibre Transmitter ViaLite LRT D3 6R 05 H1310 Optic Fibre Receiver ViaLite LRR D3 6R 05 Transmission Receiver The optic fibre link operates as follows The signal from the camera radio link is
16. ts as CLASS 1 radiation emitting devices When operating the equipment note the following e Never look into the end of an optical fibre directly or by reflection either with the naked eye or through an optical instrument e Never leave equipment with radiating bare fibres accessible always cap the connectors e Do not remove equipment covers when operating e Details of optical connections to the units compatible fibre types and care instructions can be found in the ViaLite system handbook Please read this section before using the link Adjustment maintenance and repair of the equipment should only be carried out by suitably qualified personnel For more information on the ViaLite range of products please refer to the ViaLite system handbook PPM LTD 2011 TABLE OF CONTENTS INTRODUC TION o One RHENUS URS ORIS 5 5 De 6 ti 7 14 DVB T Antenna Installation 9 9 1 6 of fibre optic connectors sssssssssssssssssssssssssssssssssscssssssssscsesssssnscsesssssnsecssssssssesecsssnsseesssssassees 10 2 SETTING UP AND UNDERSTANDING THE LINK 11 11 2 2 Fibre Optic Cable amp Connectors sssscccssssssssssssssssssssssssssesssssssssesssssssnsesssssssnscsesssssnscsesssssscsesssen 12 2 3 Using the Transmitter Module sssssccssssssssscssssssssssssssssesssssssssecssssssnse
17. ty over Temperature 3dB over operating range lt 0 08dB C below 40 C typ lt 0 1dB C above 40 C typ lt 0 05dB C typ Dynamic Range Input Third Order Intercept Input P1dB gt 10dBm Noise Figure lt 18dB at OdB optical loss User Interface Input Output Impedance VSWR 5251 Power LED Transmitter Status LED Green Transmitter laser functioning Receiver Status LED Green Received light level above threshold threshold factory set to nominal 20dB optical 40dB electrical loss Red Received light level below threshold Transmitter Alarm Output Current sink Laser Degraded Alarm Receiver Alarm Output amp Monitor Current sink Light Low Alarm Analogue Received Light Level RLL monitor RLL monitor voltage 7 75V for a gain of OdB and reduces by 0 125V per dB of RF link loss due to losses in the optical path RF Connector 750 BNC Female LNA Supply Voltage Option on optical 12VDC 350mA external feed transmitter 12VDC 80mA internal feed Optical Connector E2000 APC Narrow key gt 60dB return loss Suhner FCPC Z M A601 Monitor amp Alarm Interface Rack plug in module 15 female D type on 19 rack case backplane Shielded remote module 8pin female Lemo 1B Converter Sleeve 15pin female D type Transmitter lt 4 5W Receiver lt 4W at 12VDC 0 5VDC Operating Conditions Absolute Maximum RF Input RF in gt 15dBm 20Vdc Optical gt 60dB return loss E2000 APC Narrow key narrow key c
18. ules are available as 19 Plug in modules 2 1 1 Plug in Module The plug in modules are designed for use in PPM s ViaLite 19 Rack Case The plug in module may also be used in a standalone configuration with a Converter Sleeve The module is powered from the 19 Rack Case backplane and all connections are on the rear panel of the module Power Alarm DIN 41612 backplane connector providing power and connectivity to the module alarm outputs RF BNC connector for applying the UHF input to the optical transmitter or monitoring the UHF output from the optical receiver signal Depending on the option selected the transmitter module may have an LNA feed for powering a LNA or downconverter Optical FC APC female receptacle for connection to the cross site fibre optic cable Power Alarm Connector RF Connector Optical Connector 11 PPM LTD 2011 2 2 Fibre Optic Cable amp Connectors 2 2 1 of fibre optic connectors Modern optical connectors offer very high levels of performance reliability and repeatability However they are more sensitive to damage and contamination than electrical connectors In order to maintain full performance from your fibre optic link system it is necessary to take care to protect the connectors from damage and to keep them clean The light carrying core of a single mode optical fibre is 8um in diameter and in a mating connector pair two cores must be aligned to better than
19. ut line when the module is in the failed mode When the module is working correctly the voltage on the Alarm output line will be 1 0 0 If true VOLT FREE contacts are required please consult PPM Maximum current 50mA Maximum voltage 15V 2 6 2 Module Monitor Output All modules also provide an analogue monitor output for monitoring the condition of the Optical transmitter receiver Details of the monitor can be found in the technical specifications in section 3 of this document 18 PPM LTD 2011 2 6 3 Module Alarm amp Monitor Connection Rack Modules Connection is made to the module by the 15 way D Sub connector on the rear of the rack backplane LEE LLL ul ANN eooc0o0 E __ ERN 9 DeNeCome View looking into connector 2 OEM Modules Connection is made to the module by the 14pin boxed header Molex C Grid III 0 1 dual row connector All OEM modules are supplied with a 250mm interface cable Dig Alm Alarm Output Pink 2 from supply 8 Bak 13 9 Rx 232 Pink Connect Top view 14 pin header 19 PPM LTD 2011 3 Technical Specifications Bandwidth Bandwidth 200 900MHz Gain RF Link Gain at OdB optical loss OdB 3dB Subtract 2 x Optical Loss dB for gt 04 optical loss Optical Losses Fibre 0 4dB km typ Connectors 0 5dB per connector typ Gain Stabili
Download Pdf Manuals
Related Search
Related Contents
Blackboard 9.1 User Guide - University of West London FM-100KFⅡ 仕様書 - 日東電工CSシステム株式会社 Cámara digital con zoom Kodak EasyShare DX6440 Guía del usuario BEST Range Hoods K29 User's Manual WIRING DIAGRAMS Hvtit..ni ou Toshiba EM-31061A Scale User Manual Plan de cours SERIAL # TC42 INSTALLATION AND OPERATING INSTRUCTIONS Copyright © All rights reserved.
Failed to retrieve file