PPM ViaLiteHD HRx-C-HB-1 series Скачать руководство пользователя

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ViaLiteHD

C-Band RF Fibre Optic Link

User Guide

HRx-C-HB-1

CR4067

11/03/2019

Pulse Power & Measurement Ltd

, 65 Shrivenham Hundred Business Park, Watchfield, Swindon, Wiltshire SN68TY, UK

Tel +44 (0)1793 784389 Fax +44 (0)1793 784391 Email

[email protected]

Web

www.vialite.com

Содержание ViaLiteHD HRx-C-HB-1 series

Страница 1: ...Link User Guide HRx C HB 1 CR4067 11 03 2019 Pulse Power Measurement Ltd 65 Shrivenham Hundred Business Park Watchfield Swindon Wiltshire SN68TY UK Tel 44 0 1793 784389 Fax 44 0 1793 784391 Email sales vialite com Web www vialite com ...

Страница 2: ... isolation switch which supplies the equipment ESD Precautions The ViaLiteHD RF Fibre Optic Link is equipped with high frequency active electronics without the correct handing they will be susceptible to damage Precautions for handling electro static sensitive devices should be observed when handling all ViaLiteHD modules Technicians should ensure that they use effective personal grounding i e ESD...

Страница 3: ...3 2 4 Controlling RF modules 14 2 4 1 Manual control MGC 14 2 4 2 Manual control DIP switch functions 14 2 4 2 1 DIP switches receiver MGC 15 2 4 2 2 DIP switches transmitter MGC 15 2 4 2 3 Manual gain control example 16 2 4 2 4 DIP switches control 16 2 4 3 Changing module RF gain 17 2 4 4 Software control via SNMP controller 17 2 5 LNA LNB and BUC DC feeds 17 2 5 1 LNA LNB feed transmitter modul...

Страница 4: ...ty P1dB compression 24 3 7 Linearity IP3 intermodulation 24 3 8 Spurious Free Dynamic Range SFDR 25 3 9 Link delay 26 3 10 RF isolation 26 3 10 1RF isolation plug in cards 26 3 11 Typical system configuration with fixed gain modules 27 3 12 Commissioning of a communications link 27 4 PART NUMBERING 28 4 1 Part numbering matrix 28 4 2 Part numbering DWDM wavelengths 28 5 MAINTENANCE AND FAULT FINDI...

Страница 5: ...f light with the RF signal which then travels through an optical fibre to the receiver module The distance between transmitter and receiver can range from 1m to 100km distances in excess of 100km can be achieved with more complex optical transport systems depending on the system specified The receiver module converts the modulated light back into an electrical signal which is available at the outp...

Страница 6: ...on the connectors may be left in place Push the release button of the module handle down and simultaneously pull the top of the handle towards you Align the module upright and perpendicular to the front face of the chassis so that the PCB slides into the crow s feet card guides top and bottom Gently push the module down its guide applying pressure via the handle you may also apply pressure between...

Страница 7: ...ust or dirt is visible within the connector body cleaning with compressed air before mating is advised When attaching cables to these RF connectors a torque wrench should be used to guarantee tightening to 1 0 Nm 2 1 3 Purple link modules The Purple Link is a small dustproof C Band RF over fibre module available for both the transmitter and receiver The 15 way D type connector provides connectivit...

Страница 8: ...be cleaned before use even where they have been protected with dust caps A large percentage of performance issues can be attributed to dirty fibres For more details please read the cleaning instruction which accompanies the connector cleaning kit Details can also be found on the CD supplied with your equipment 2 2 3 Cleaning optical connectors high levels of contamination If there are performance ...

Страница 9: ...cal 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 all modules and completely disconnect the optical fibres 2 2 4 FC APC Connectors To connect FC APC optical connectors follow these steps Remove the dust caps and align the white ceramic centre ferrule on the cable connector wi...

Страница 10: ...automatically disengage Push until a click is heard and the connector locks To disconnect To disconnect depress the lever at the rear of the connector and withdraw the connector The protective cover automatically engages when removed Only connect E2000 APC cable to E2000 APC adaptors 2 2 7 Minimum bend radius Because optical fibre is made of glass it is important not to subject it to excessive str...

Страница 11: ...RED fast TX Alarm Not used Flashing RED slow Not used RX Alarm RED Not used Not used LED3 GREEN I2C enabled Flashing GREEN I2C active AMBER I2C disabled 2 3 3 LED indicator purple modules These modules are fitted with a single LED for indication of the state of the module 2 3 4 Module summary alarm Each module has a single summary alarm which registers the status of the module Activation of this a...

Страница 12: ...rm lines pull up by other chassis equipment such as switch splitter summary alarm or SNMP and web controller modules 2 3 6 Received light level RLL alarm Receiver modules monitor the average incoming received light level RLL if the power drops below a pre set threshold the module will generate an RLL alarm The RLL alarm threshold is set for a nominal input power of 15 0dBm o Nominal optical loss o...

Страница 13: ...bility that at high temperature operating efficiency will be reduced Furthermore if the active thermal control is unable to maintain laser operating temperature a major alarm and module shutdown will ensue To maintain full operational temperature and efficiency we suggest that you take the following actions Do not place DWDM transmitters adjacent to each other When using a 3U chassis if more than ...

Страница 14: ...one third of its length Two sets of switches will be installed depending on the type of module Details of the function of each switch are given in the section below 2 4 2 Manual control DIP switch functions Located on the bottom side of the module board three DIP switches SW1 to 3 provide manual control of various functions SW1 and SW2 are dedicated to manual gain control MGC Once TX_MGC_ON or RX_...

Страница 15: ...n can be changed in nominal steps of 0 5dB For special manual gain control modules record the factory setting of each gain step this is the preset gain of the receiver RXMGC ON Manual gain control OFF Software control or at default setting RX 0 5dB ON Gain increased by 0 5dB nominal OFF no gain increase RX 1dB ON Gain increased by 1dB nominal OFF no gain increase RX 2dB ON Gain increased by 2dB no...

Страница 16: ...hat you record the initial setting of each switch this is the preset configuration of the module SW3 control functions are common to the whole module The on board micro controllers can be manually reset by using TX_RESET and or RX_RESET they must return to the OFF clear position to initiate the actual reset sequence Switching on SNMP_dis will disable the module I2C bus for that module In this case...

Страница 17: ...ages supplied 2 5 1 LNA LNB feed transmitter modules Transmitter modules may be used to provide a power feed via the RF connection to a preceding low noise amplifier LNA or low noise block down converter LNB The voltage source for this function can be supplied externally via a chassis connection or from the module s on board voltage generator The external DC paths option 3 of a module may be acces...

Страница 18: ... may have a resistance of up to 0 2 ohms per meter this varies greatly between different types and constructions of cable Voltage measured at RF connector versus load current input voltage 12V NOTE the graph shows the module operating beyond its specification limit to illustrate the margin of safe operation it should not be operated beyond its specification limit 2 5 6 BUC feed receiver modules Re...

Страница 19: ...ilure in some very sensitive spectrum analysers or similar equipment Please check before connecting your equipment Contact ViaLite Communications for more details 2 6 2 Protection of ViaLiteHD equipment from DC pulses All modules have AC coupled inputs and or outputs and will be sensitive to large transients 5V applied at the RF connector This may result in permanent damage to the modules particul...

Страница 20: ...P and web controller or summary alarm card the alarm lines maybe loaded and pulled up see chassis handbook Note When fitted in a chassis or enclosure adjacent to a RF switch or RF splitter card alarm lines maybe loaded and pulled up see chassis handbook 2 6 6 Power interface 12V input Nominal input voltage 12V Maximum operational voltage range 11 5 to 13V 2 6 7 Analogue interface laser diode bias ...

Страница 21: ...e increased 1V Output boost ENABLE Voltage when set to AUX Nominal output voltage 22V AUX mode ON Output voltage range 21 to 23V Current rating 150mA per channel for single transmit channel Short circuit protection Yes TONE active Nominal output level 0 6Vp p Tone Gen ACTIVE Output range 0 4 to 1 2Vp p Nominal frequency 22kHz Frequency accuracy 20 to 24 kHz 2 6 10 RF connectors Maximum RF input po...

Страница 22: ...e if the fibre is under excessive tension compression or is bent into a small radius For clean undamaged single mode connectors optical insertion loss is typically 0 2dB per interface Note The losses at the optical connections of the transmitter and receiver are allowed for during manufacture of the module and may be ignored during link gain calculations For short links 250m containing no addition...

Страница 23: ... pair TX 0dB RX 15dB 3 4 1 Effect of temperature on gain The gain of a ViaLiteHD C Band Link generally reduces as temperature increases The graph below shows change in RF gain versus the room temperature gain 6 00 5 00 4 00 3 00 2 00 1 00 0 00 1 00 2 00 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Response dB Frequency MHz ViaLite Link Frequency response 1 5 1 0 0 5 0 0 0 5 1 0 1 5 30 20 10 0 10...

Страница 24: ...lowered as a trade off with noise figure when commissioning a system to best align with the signal levels present Below is the data for a High Gain link pair TX 0dB RX 15dB 3 7 Linearity IP3 intermodulation The IP3 Compression point of a ViaLiteHD C Band Link is generally consistent with frequency The nominal point can be raised or lowered as a trade off with noise figure when commissioning a syst...

Страница 25: ...ltering the gain of the transmitter in order balance the link Noise Figure and linearity the SFDR is largely unaffected Below is the data for a High Gain link pair TX 0dB RX 15dB 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 0 1000 2000 3000 4000 5000 6000 7000 8000 Input IP3 dBm Frequency MHz ViaLite Link IP3 96 98 100 102 104 106 108 110 112 0 1000 2000 3000 4000 5000 6000 7000 8000 SFDR dB Frequency ...

Страница 26: ...ic RG 59 4 1 ns per meter dependent on dielectric RG 213 5 1 ns per meter RG 316 4 2 ns per meter Delays quoted are typical for these cable types construction of cables of the same type will vary between manufacturers i e foam PTFE solid polyethylene dielectric If delay is critical please check your manufacturer s cable specification or electrically test the cables 3 10 RF isolation ViaLiteHD card...

Страница 27: ...is damaged 1 Install the link connecting all optical patch cords and cross site fibre optic cables Clean ALL optical connectors BEFORE mating with the modules 2 Power up the equipment and allow 15 minutes to warm up 3 Ensure that the RF power into the transmitter module is set to optimum for your system Use a broadband RF power meter for this measurement Typically this is the input level at which ...

Страница 28: ... 194400 1542 1423 C56 195600 1532 6813 H20 192050 1561 0125 H32 193250 1551 3193 H44 194450 1541 7457 H56 195650 1532 2896 C21 192100 1560 6062 C33 193300 1550 9180 C45 194500 1541 3494 C57 195700 1531 8981 H21 192150 1560 2001 H33 193350 1550 5170 H45 194550 1540 9533 H57 195750 1531 5068 C22 192200 1559 7943 C34 193400 1550 1161 C46 194600 1540 5573 C58 195800 1531 1157 H22 192250 1559 3886 H34 ...

Страница 29: ...Check all optical connectors are clean Low signal level Gain adjustment set too low RF feed not connected Optical loss too high Incorrect optical connectors Incorrect manual or software gain settings Input power too high Increase gain setting Check RF connections Clean and check Optical connections Ensure that optical cable matches the type of connectors on you ViaLiteHD module normally cable and ...

Страница 30: ...les These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is ...

Страница 31: ... hours provided that the Customer will pay at the rates currently charged by ViaLite Communications 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 ViaLite Communications prior to returning any goods for warranty o...

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