SVA 1 Single-mode Fiber Optic Variable Attenuator User's Guide
Contents
1. step measure optical power of the transmitter In the following procedures the Noyes OPM 5 optical power meter is used to perform measurements 1 Turn on the OPM 5 optical power meter refer to Figure page 5 2 Select the appropriate fiber optic test jumper Note The fiber type of this jumper must be the same as the fiber type normally connected to the output being measured 3 Mount the appropriate adapter cap on the OPM 5 optical input This adapter cap must match the connector on the end of the test jumper you will connect to the OPM 5 4 Connect one end of the test jumper to the OPM 5 adapter cap and the other end to the optical output to be measured 5 Press the A key to select the calibrated wavelength that matches the nominal wavelength of the source being measured 6 Press the dB dBm key to display power in dBm this is the measured NON ATTENUATED power level If using a power meter other then OPM 5 or OPM 4 record this measurement 7 Press and hold the REF key until HELD appears to set the reference level at the current wavelength The OPM 5 should display O dB 0 05 dB lt _ 3 adapter cap transmit jumper heed network es transmitter oor BOO om 10 FG an 7 network receiver Note The high return isolation of the attenuator assures that the transmitt2. with optical systems NOTICE An SVA 1 Single mode Variable Attenuator contains no user serviceable parts Except for cleaning optical ports this instrument must be returned to Noyes or authorized agents for repair IMPORTANT Proper care in handling should be taken when using any precision optical test equipment Scratched or contaminated optical connectors can impact the performance of the instrument It is important to keep the dust caps in place when the unit is not being used Section 1 General Information Thank you for purchasing a Noyes SVA 1 Single mode Variable Attenuator The purpose of this user s guide is to explain how to use and maintain this instrument Please check our web site at www AFLtele com click on Products gt Noyes Test amp Inspection for updates to this manual and additional application information If you have any questions about your instrument and recommended accessories or if you need technical or sales support please contact Noyes Customer Service Contacting Noyes Customer Service You may call Noyes Customer Service between 8 a m and 5 p m United States Eastern Time as follows Phone 800 321 5298 603 528 7780 Fax 603 528 2025 Web www AFLtele com click on Products gt Noyes Test amp Inspection Unpacking and Inspection This instrument has been carefully packed in accordance with standard shipping procedures Examine the equipment for damage that may have occurred during shipment If
3. you find any damage please contact Noyes Feature Overview The SVA 1 Single mode Variable Attenuator advances fiber optic field testing by offering superior performance in a low cost hand held package Utilizing a simplified industry accepted attenuation technique the innovative design of the SVA 1 offers superior resolution across the entire 60 dB dynamic range Intended for field testing during installation new equipment turn ups or routine maintenance the SVA 1 is acomplete easy to use attenuator Its unique features allow bidirectional signal transmission with no loss penalty The SVA 1 is available with a variety of connectors and reflectance options better than 60 dB With only two adjustments COARSE and FINE the SVA 1 is simple to understand and operate The SVA 1 is suited for all single mode applications including Telco LANs WANs Video and CATV Recommended Accessories You will need fiber optic test jumpers to connect your SVA 1 to the system under test Test jumpers must have the same core and cladding size as the fiber under test Test jumpers require the appropriate connectors on each end to match to the system s connector style and the output connector on the SVA 1 Test cables and jumpers with a variety of lengths and connector styles are available from Noyes A supply of optical cleaning pads and isopropyl alcohol or a connector cleaning cartridge is recommended to clean the optical connectors on your SVA 1 and
4. P AFL Telecommunications A Fujikura Business SVA 1 Single mode Fiber Optic Variable Attenuator User s Guide fP AFL Telecommunications A Fujikura Business SVA 1 Single mode Fiber Optic Variable Attenuator User s Guide Alo N OYES Test amp Inspection 2003 AFL Telecommunications all rights reserved SVA1 00 1000 Revision C 9 15 05 Specifications are subject to change without notice Limited Warranty One Year Limited Warranty All Noyes products are warranted against defective material and workmanship for a period of one year from the date of shipment to the original customer Any product found to be defective within the warranty period will be repaired or replaced by Noyes In no case will Noyes liabilities exceed the original purchase price of the product Exclusions The warranty on your equipment shall not apply to defects resulting from the following Unauthorized repair or modification Misuse negligence or accident CE Information These instruments have been C designed and tested to comply with the relevant sections of any applicable specifications including full compliance with all essential requirements of all applicable EU Directives Returning Equipment To return equipment please contact Noyes to obtain additional information and a Service Request S R number To allow us to serve you more efficiently please include a brief description specifying the reason
5. er is not adversely affected by reflected power step Il insert SVA 1 between transmitter and receiver 8 Insert the SVA 1 attenuator between the transmitter and receiver 9 Increase the attenuation by turning the Fine or Course knobs until the Bit Error Rate exceeds the specified minimum rate network lt q gt gt network transmitter receiver receive jumper transmit jumper step III measure system margin 10 Disconnect the receive jumper at the receiver and connect it to the OPM 5 optical power meter The ATTENUATED power level will automatically be displayed In diagram below the OPM 5 indicates an additional 7 dB of loss that is available before system failure Changing the display reading to dBm gives the absolute level at which system failure occurred This level should be within the receiver manufacturer specifications If using an optical power meter other then OPM 5 or OPM 4 calculate the system margin by subtracting the NON ATTENUATED power level from the ATTENUATED power level Note Adjusted attenuation is wavelength dependent Confirm loss levels when changing light source transmit jumper network transmitter receive jumper network receiver Receiver Sensitivity Test If the power measured by an optical power meter is too high or hot for the receiver perform the following steps 1 Insert the SVA 1 attenuator between the transmitter and rece
6. iver 2 Increase the attenuation by turning the Fine or Course knobs until the system operates properly 3 Connect the optical power meter to the SVA 1 to measure the attenuated power 4 The loss displayed on the optical power meter is the attenuation required to bring the system within specifications of the receiver Note A fixed attenuator of the appropriate value can then be permanently inserted in the system This process is referred to as padding the system Section 4 Cleaning Maintenance the Optical Ports It is important to keep all optical connections and surfaces free from dirt oils or other contamination to ensure proper operation Scratched or contaminated connectors can reduce system performance Optical ports must be kept free from dirt or other contaminates to ensure acc and operation Noyes recommends using our new non flammable environmentally safe solution and m It is important olded dual head connector end face cleaning tips urate measurements A supply of optical cleaning pads and isopropyl alcohol is recommended to clean the optical ports Fiber Optic Cleaning o keep the dust cap in place when the unit is not being used Section 5 Specifications SVA 1 Specifications Specified Wavelengths 1310 nm amp 1550 nm 30 nm Insertion Loss lt 1 5 dB 1310 nm Minimum Attenuation 60 dB Return Loss 50 dB gt 60 dB optional angled FC Coarse Ad
7. justment 0 to 60 dB nominal Fine Adjustment 0 to 10 dB nominal Standard Connector FC ST SC Operating Temperature C 10 to 55 Storage Temperature C 30 to 60 Dimensions 5 5 H x 2 75 W x 1 5 D 14 x 7 x 3 8 cm Weight 0 4 Ib 0 2 kg 10 d AFL Telecommunications A Fujikura Business Thank you for choosing Noyes Test amp Inspection 16 Eastgate Park Road Belmont NH 03220 Phone 800 321 5298 AAA 603 528 7780 CERTIFIED Fax 603 528 2025 www AFLtele com gt Products gt Noyes Test amp Inspection Ao a OYES Test amp Inspection
8. s for the return of the equipment AFL Telecommunications Noyes Test amp Inspection 16 Eastgate Park Road Belmont NH 03220 Phone 800 321 5298 603 528 7780 Fax 603 528 2025 Contents Section 1 Section 2 Section 3 Section 4 Section 5 Safety MMOPMAL ON sisien e EE General Information Contacting Noyes Customer Service c cccccccsesececeeessseeeseeees Unpacking and INSPECTION seinri iante sapaan aiias FC ature OVGIVIEWS veut sdisiginan wieamivaninviiuedinndemiieiias Recommended ACCESSOFIES ccccceecsesecsecsecesseesessteevsesstessseeates Functional Description SVA 1 Front PaNEl ss sissies issatesiessen sina ianinaieavnaansinsien insite y Applications System Margin TeSt se seessneseissatecsacetecahs cagesvinsateestncatyearesmabeeteh step measure optical power of the transmitter cee step II insert SVA 1 between transmitter and receiver Step Ill measure system Margin neennncrnrsniniinss Receiver Sensitivity TeSt ic cscessscsonesssasesssssevasssaedineevenssasaeesssevanes Maintenance Cleaning the Optical POMS sissies daemon Specifications SVA 1 Specifications vo cccceeeccsssetecssetersssetesssseersseseseseeeeress Safety Information A CAUTION To avoid serious eye injury never look directly into the optical outputs of fiber optic network equipment test equipment patch cords or test jumpers Refer to your company s safety procedures when working
9. test cables A supply of fiber optic cleaning swabs or a can of filtered compressed air is recommended for cleaning connector adapters Noyes recommends using our new non flammable environmentally safe Fiber Optic Cleaning solution and molded dual head connector end face cleaning tips Section 2 Functional Description SVA 1 Front Panel Input Output port used to connect the SVA 1 to the receiver or transmitter end of the system under test Fine adjustment knob used for fine attenuation adjustment 0 to 10 dB nominal Display windows indicate the attenuation adjustment being between minimum or maximum IU lt Input Output port used to connect the SVA 1 to the receiver or SVA 1 SINGLEMODE ATTENUATOR transmitter end of the system under test FINE COURSE ES eE 10 dB 60 dB Coarse adjustment knob used for course adjustments 0 to 60 dB MAX MAX nominal Display windows indicate the attenuation adjustment being between minimum or maximum n NOYES FIBER SYSTEMS Section 3 Applications System Margin Test The SVA 1 is used effectively during system margin measurements To measure the system margin first measure the absolute power in dBm of the transmitter with an optical power meter and record the measured NON ATTENUATED power level
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