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Related Manuals for PPM ViaLiteHD HRx-C-HB-1 series
Summary of Contents for PPM ViaLiteHD HRx-C-HB-1 series
- Page 1 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 sales@vialite.com www.vialite.com...
- Page 2 -C-HB-1 C-B ANDBOOK Instrument Care and Safety Information Please read the whole of this section before using your ViaLiteHD product. It contains important safety information and will enable you to get the most out of your Fibre Optic Link. Electrical Safety The ViaLiteHD chassis is a Safety Class 1 product (having metal case directly connected to earth via the power supply cable).
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Page 3: Table Of Contents
-C-HB-1 C-B ANDBOOK TABLE OF CONTENTS INTRODUCTION ..........................5 The C-Band ........................... 5 Typical deployment ....................... 5 Care of fibre optic connectors ....................5 SETTING UP AND UNDERSTANDING THE FIBRE OPTIC LINK ..........6 Module operation ........................6 2.1.1 5HP standard plug-in modules ................... 6 2.1.2 RF connectors ...................... - Page 4 -C-HB-1 C-B ANDBOOK SYSTEM INTEGRATION ......................22 Link loss budget calculations ....................22 Optical loss versus gain ...................... 22 Optical loss versus noise figure ..................22 Gain ............................. 23 3.4.1 Effect of temperature on gain ................... 23 Noise Figure ........................24 Linearity (P1dB compression) .....................
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Page 5: Introduction
The ViaLiteHD RF Fibre Optic Links (FOLs) are a family of fibre optically coupled link systems designed for the transmission of RF analogue signals over long distances for the communications market. ViaLiteHD is a product brand manufactured by Pulse Power and Measurement Ltd (PPM). ViaLite Communications is a division of Pulse Power and Measurement Ltd (PPM). -
Page 6: Setting Up And Understanding The Fibre Optic Link
-C-HB-1 C-B ANDBOOK Setting up and understanding the fibre optic link This section describes the connections between your RF fibre optic transmitter (electrical – optical converter) and receiver (optical - electrical converter) modules, and the operation of both modules in a system. -
Page 7: Rf Connectors
-C-HB-1 C-B ANDBOOK 2.1.2 RF connectors ViaLiteHD C-Band link products are fitted with 50 Ohm female SMA connectors. The SMA connector is a semi-precision sub-miniature RF and microwave connector and to maintain performance up to 8GHz, ensure that when not in use, the supplied RF connector dust caps are fitted. If any dust or dirt is visible within the connector body, cleaning with compressed air before mating is advised. -
Page 8: Fibre Optic Cable & Connectors
-C-HB-1 C-B ANDBOOK Fibre optic cable & connectors All ViaLiteHD RF modules use single-mode (9µm/125µm) cable terminated in a range of optical connectors detailed below. Cross-site fibre optic cables are available from ViaLite Communications as either standard patch leads or heavy-duty multicore cables. Angle polished (APC) and standard (PC) connector must not be confused. -
Page 9: Fc/Apc Connectors
-C-HB-1 C-B ANDBOOK Using the air duster, blow away any residue from the end of the connector. Module Female Receptacle Cleaning (only recommended if problems are being experienced) Either use an optical cleaning stick or twist a cleaning tissue to form a stiff probe, moisten either with IPA. -
Page 10: Sc/Apc Connectors
-C-HB-1 C-B ANDBOOK 2.2.5 SC/APC Connectors To connect SC/APC optical connectors follow these steps: Remove the plug protective cover. Align the connector keyway slot in the adaptor to the key of the plug. Gently push the plug-into the adapter until a click is heard and the connector locks. To disconnect follow these steps: ... -
Page 11: Using The Rf Link Module
-C-HB-1 C-B ANDBOOK Using the RF link module 2.3.1 Connecting the module Connect the transmitter module to the power source, cross-site fibre optic cable and RF signal as described in section 2.1. The RF input signal applied to the signal connector should be within the maximum and minimum signal levels given in the datasheet. -
Page 12: Connecting To The Summary Alarm
-C-HB-1 C-B ANDBOOK 2.3.5 Connecting to the summary alarm The alarm output pin should be connected to a suitable current source (a positive voltage via a 10kohm pull-up resistor is adequate). When the module is in a working (non-alarm) state, the alarm output pin is short circuited to ground by the module. -
Page 13: High Power And Dwdm Transmitter Modules, Thermal Load
-C-HB-1 C-B ANDBOOK The performance of the analogue monitors is as follows Monitor type Operation TX analogue, = 25 x I current monitor output = Voltage output of the current monitor, in volts = Average bias current of laser diode, in amps is 0 –... -
Page 14: Controlling Rf Modules
-C-HB-1 C-B ANDBOOK Controlling RF modules ViaLiteHD RF links are factory set and ready to operate. However, they can be software controlled (where an SNMP module is used in the same chassis) or manually controlled via the DIP switches fitted on each module. -
Page 15: Dip Switches - Receiver Mgc
-C-HB-1 C-B ANDBOOK SW1 Top DIP switch bank Single transmitter HRT Single receiver HRR Not fitted RXMGC RX – 0.5dB Not fitted RX – 1dB Not fitted RX – 2dB Not fitted RX – 4dB Not fitted RX – 8dB Not fitted SW2 Middle DIP switch bank Single transmitter HRT... -
Page 16: Manual Gain Control Example
-C-HB-1 C-B ANDBOOK TXMGC ON = Manual gain control, OFF = Software control or at default setting TX – 0.5dB ON = Gain increased by 0.5dB nominal, OFF= no gain increase TX – 1dB ON = Gain increased by 1dB nominal, OFF= no gain increase ... -
Page 17: Changing Module Rf Gain
-C-HB-1 C-B ANDBOOK 2.4.3 Changing module RF gain The link performance specifications apply when modules are operated in the factory preset configuration. However, the gain of the modules can be changed to suit customer requirements. The performance of the transmitter is highly dependent on the laser diode. Changing transmitter and receiver gain will affect the sensitivity and linearity of the module. -
Page 18: Lna Feed - Purple Link Modules
-C-HB-1 C-B ANDBOOK +1V nominally. This is implemented using the modules software configuration. This option is NOT available on units equipped with +5V, +12V or external voltage feeds. 2.5.4 LNA feed - Purple link modules Modules in this range offer an internally generated +5V or +12V feed and external feed only. LNA feed –... -
Page 19: Manual Configuration Of Lna/Lnb And Buc Feeds, Plug-In Modules
-C-HB-1 C-B ANDBOOK 2.5.7 Manual configuration of LNA/LNB and BUC feeds, plug-in modules Some modules can be configured either by jumper or by switch to provide an LNA/LNB or BUC feed either from an internally generated voltage or from the rear connector in the ViaLiteHD chassis. The diagram below shows how these are set. -
Page 20: Logic Interface, I2C
-C-HB-1 C-B ANDBOOK 2.6.4 Logic interface, I2C Absolute maximum voltage rating -0.3 to +5.3V No damage Input, Logic Low (max) <1.5V Input, Logic High (min) >3.5V Output, Logic Low (max) <0.6V no load Output, Logic High (min) >4.3V no load Drive capability 1k ohms Short circuit protection... -
Page 21: Internally Generated Lnb Power Supply And Tone
-C-HB-1 C-B ANDBOOK 2.6.9 Internally generated LNB power supply and tone Voltage set to LOW Nominal output voltage 13.4V, Output select = LOW Output voltage range 12.4 to 14.4V Current rating 700mA per channel for single transmit channel Short circuit protection Voltage set to HIGH Nominal output voltage 18.5V, Output select = HIGH... -
Page 22: System Integration
-C-HB-1 C-B ANDBOOK System integration Link loss budget calculations The link gain (transmitter RF input level to receiver RF output level) depends on the following factors: Optical loss (due to connector insertion loss and optical fibre loss). Transmitter gain setting. ... -
Page 23: Gain
-C-HB-1 C-B ANDBOOK Gain The Gain of a ViaLiteHD C-Band Link is generally consistent with frequency in the designated downlink and uplink bands. Useable gain and performance can be found in a wide range from 500MHz to 8 GHz. Below is the data for a High Gain link pair (TX=0dB, RX=15dB) ViaLite Link: Frequency response 2.00 1.00... -
Page 24: Noise Figure
-C-HB-1 C-B ANDBOOK Noise Figure The noise Figure of a ViaLiteHD C-Band Link generally increases with frequency resulting in a lower noise figure for the downlink than the uplink. The nominal Noise Figure can be raised or lowered as a trade off with linearity when commissioning a system to best align with the signal levels present. -
Page 25: Spurious Free Dynamic Range (Sfdr)
-C-HB-1 C-B ANDBOOK ViaLite Link: IP3 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 Frequency (MHz) Spurious Free Dynamic Range (SFDR) The SFDR of a ViaLiteHD C-Band Link is generally lower at higher frequencies due to the impact of the Noise Figure increasing with frequency. -
Page 26: Link Delay
-C-HB-1 C-B ANDBOOK Link delay The ViaLiteHD link introduces a small amount of delay to the system, similar to the contribution of an amplifier. The typical delay contribution is shown below. You should also account for delay through RF and fibre cables as these are likely to be much higher than the delay in the link fibre optic modules. ... -
Page 27: Typical System Configuration With Fixed Gain Modules
-C-HB-1 C-B ANDBOOK 3.11 Typical system configuration with fixed gain modules The diagram below illustrates a typical communications system configuration. RF feeds for Antenna SSPA and LNA ViaLiteHD chassis Patch cables Cable Termination box Cross site cable Cross site cable Cable Termination box Patch cables ViaLiteHD chassis... -
Page 28: Part Numbering
-C-HB-1 C-B ANDBOOK Part numbering Part numbering matrix Note: Options are dependent on module type. Not all combinations of options are available. Contact ViaLite Communications for more details. Part numbering, DWDM wavelengths Frequency Wavelength Frequency Wavelength Frequency Wavelength Frequency Wavelength Channel Channel Channel... -
Page 29: Maintenance And Fault Finding Guide
-C-HB-1 C-B ANDBOOK Maintenance and fault finding guide Refer to the following table that gives a list of commonly encountered problems and suggested solutions. Fault Possible Causes Solution Power LED does Power is not connected to Connect mains power to the rear of the PSU. not illuminate. -
Page 30: Fcc Approval
-C-HB-1 C-B ANDBOOK FCC Approval Information to the user of ViaLiteHD products: For a Class A digital device or peripheral, the following instructions are furnished to the user. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. -
Page 31: Product Warranty
-C-HB-1 C-B ANDBOOK Product warranty ViaLite Communications guarantees its ViaLiteHD products, and will maintain them for a period of three years from the date of shipment and 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 module to ViaLite Communications.
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