Wavecrest OE-2 Скачать руководство пользователя

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SECTION 1– Introduction

The

WAVECREST

OE-2

converts optical communications signals into electrical signals. In

combination with a

WAVECREST

DTS

SIA

system, the

OE-2

enables accurate, high performance

jitter measurements on optical signals. The

OE-2

can be operated in local mode or it can be

controlled through its GPIB interface using

WAVECREST’s

Virtual Instruments

™

Signal Integrity

(

VISI

) software.

Features

The

OE-2

incorporates all of the features needed for making single- or dual-channel, high

performance optical signal measurements.

Fully Calibrated

The

OE-2

is fully calibrated from the optical input to the electrical output permitting

accurate signal level measurements without the need for additional instruments.

High Bandwidth

- Enables measurement of high-speed data communication signals.

Built-in Amplifiers

- Boosts low power signals to measurable levels.

Built-in Filters

Used to establish the noise bandwidth of optical signals. Available filter options include Fibre
Channel, Fibre Channel 2X, Gigabit Ethernet, InfiniBand™, XAUI, and SONET OC-48.

Power Meter

ach channel of the

OE-2

includes an average optical power meter.

High-Speed Measurements

WAVECREST

DTS or

SIA

system with an

OE-2

can quickly make highly

accurate jitter measurements.

GPIB Interface

- The

OE-2

can be run remotely via the GPIB or locally via the front panel.

Dual Channel Capability

- The

OE-2

is available in single-channel or dual-channel models.

Figure 1 – Dual-Channel

OE-2

shown with

WAVECREST

SIA-3000

Section 1 | Introduction |

Содержание OE-2

Страница 1: ...WAVECREST Corporation OE 2 Optical to Electrical Signal Converter User s Guide and Reference Manual 200005 01 REV A ...

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Страница 3: ...T product may differ in some respect from its published description but will always equal or exceed the original design specifications unless otherwise stated Copyright 2002 WAVECREST Corporation A Technologies Company 7626 Golden Triangle Drive Eden Prairie Minnesota 55344 952 831 0030 800 733 71 28 www wavecrest com All Rights Reserved U S Patent Nos 4 908 784 and 6 185 509 6 194 925 6 298 315 B...

Страница 4: ...s Upon termination you must immediately destroy the Software together with all copies adaptations and merged portions in any form Limited Warranty and Limitation of Liability Wavecrest SPECIFICALLY DISCLAIMS ALL OTHER REPRESENTATIONS CONDITIONS OR WARRANTIES EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPO...

Страница 5: ...TION 3 Instrument Set up and Measurement 9 Test System Requirements 9 Before Using the OE 2 9 Instrument Setup 9 VISI Software Setup and Configuration 10 Manually Assigning GPIB Addresses 11 Automatically Assigning GPIB Addresses 11 Setting Acquire Options 13 External Calibration 15 Output Setting Options 16 Trigger Options 17 View Options 17 Taking a Measurement 18 Appendix A Specifications and M...

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Страница 7: ...2 as well as using Virtual Instruments Signal Integrity software through a WAVECREST SIA 3000 or DTS 207x instrument APPENDIX A Specifications This section contains a comprehensive set of specifications for the OE 2 APPENDIX B GPIB Commands Includes various parameters values and codes necessary for implementing remote control of the OE 2 via the IEEE 488 interface APPENDIX C Preprogrammed Measurem...

Страница 8: ...or accessories Power cord Two 2 build out SMA connectors for Dual channel instrument one 1 connector for Single channel instruments Two 2 optical build out connectors for Dual channel instrument one 1 connector for Single channel instruments OE 2 User s Guide and Reference Manual Inspect the instrument If there is mechanical physical damage or if the instrument does not power up properly notify WA...

Страница 9: ...signal level measurements without the need for additional instruments High Bandwidth Enables measurement of high speed data communication signals Built in Amplifiers Boosts low power signals to measurable levels Built in Filters Used to establish the noise bandwidth of optical signals Available filter options include Fibre Channel Fibre Channel 2X Gigabit Ethernet InfiniBand XAUI and SONET OC 48 P...

Страница 10: ...cations protocols selectable by electronic switches In addition a fifth setting bypasses the filters for full bandwidth operation Filter settings can be independently selected for each channel using front panel controls or through the GPIB interface A bank of wideband electronic amplifiers follows the filters These electronically switched amplifiers amplify the electrical signal by approximately 1...

Страница 11: ... be detected until injury to the eye or skin has occurred To prevent injuries basic precautions should be followed NEVER look directly into an optical signal connector Always assume a laser beam is present NEVER direct an optical output signal connector in a direction that could cause harm to personnel nearby Always turn optical output signal devices OFF when not in use Where practical protective ...

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Страница 13: ... filter selection knob selects one of the four low pass filters or full bandwidth Filter options are described in Appendix A Filters are independently selected for each channel dual channel models can use two different filters Filter selection can also be made through the GPIB interface See Appendix B for GPIB commands 2 Amplifier Selection The amplifier selection knob selects one of the four ampl...

Страница 14: ...ctrical signal is a linear representation of the optical signal CAUTION This output port is sensitive to electrostatic discharge Use ESD protection when connecting to this port 6 Channel 2 Optical Input This FC UPC input connector accepts either single mode or multimode up to 62 5 um optical fibers Optical signals from 770 to 1650 nm can be used Before attaching any connector to the OE 2 clean all...

Страница 15: ... 4AT 250V fuses 5x20 mm 12 Reset Pushbutton The Reset Pushbutton resets the OE 2 to the Power Up state This state is set to Full Bandwidth 10DB 1550NM in the factory The end user may change this setting remotely by using GPIB commands that are specified in Appendix B 13 Fan Exhaust Exhaust port for internal cooling fan Maintain at least 1 inch 2 5 cm clearance 14 AC Primary Switch Controls the AC ...

Страница 16: ...er s discretion A full GPIB command set is provided in Section 3 16 GPIB Port Address Switch Sets the address of the GPIB port The address can be set from 1 to 31 Address 0 is reserved for the controller the default OE 2 address is 6 The switch settings are in binary format as shown in the drawing below For example the switch setting shown below selects port 6 The last three switches are not used ...

Страница 17: ...nnector can be replaced if it becomes damaged or dirty A dirty or scratched O E input connector can severely degrade the input signal resulting in inaccurate measurements NOTE If the O E input connector is damaged the instrument must be returned to WAVECREST for repair Before Using the OE 2 To ensure the highest accuracy and proper GPIB operation it is important that All OE 2 s are warmed up for a...

Страница 18: ...he GPIB Board Mode pull down menu Click Apply Click Close Optical Configuration The Optical Configuration menu enables the user to Set up the IEEE 488 GPIB addresses for one or more OE 2 s up to five OE 2 s can be addressed in a single VISI based system Assign each OE 2 channel to a WAVECREST SIA or DTS instrument channel Set preliminary optical measurement parameters To access the Optical Configu...

Страница 19: ...dress for the bus connected to the OE 2 s The Optical GPIB Device field sets the address of the OE 2 s connected to the GPIB bus Set the Optical GPIB Device to the DIP switch setting on the back panel of the OE 2 and select the Add Device button The OE 2 address will appear in the Remote Device List In the case of multiple OE 2 installations each remote device will have to be individually added Th...

Страница 20: ...The left hand OE 2 channel will be named Port 1 and the right hand channel will be named Port 2 Optical Configuration Dialog Box Optical Channel Assignments Finally it is necessary to assign each OE 2 channel to a channel of the WAVECREST DTS or SIA instrument by highlighting one line in the Optical Input field corresponding to one channel path and selecting the DTS or SIA input channel in the SIA...

Страница 21: ... channel To set the Acquire Options From the Main Dialog Bar select Utilities The Utilities dialog bar will be displayed From the Utilities Dialog Bar select Optical Interface The Optical Interface tool will be displayed From the Optical Interface Dialog Bar select Acquire Options The Acquire Options dialog bar will be displayed see figure to the right Section 3 Setup and Measurement 13 ...

Страница 22: ...s the standards limits The default values for the preprogrammed settings are listed in Appendix C Select the Standard drop down menu Standards corresponding to the filters installed in the OE 2 will be listed in the Standard window For example if the OE 2 has filter option 1 with Fibre Channel Gigabit Ethernet and Infiniband filters installed those standards will appear in the drop down list Selec...

Страница 23: ...ormed and when complete the message The calibration was successfully completed will appear Reconnect your signal after the calibration process is done In the event that a calibration error warning appears repeat the calibration process making sure All optical signals are removed from the optical input The correct channel is selected The OE 2 GPIB Address and Optical Channel Assignments are correct...

Страница 24: ...wer units Select from units of dBm µW or mW for all power measurements Average power limit Pass Fail limit value The minimum average optical power limit specified in power units Modulation Measure Select either extinction ratio or optical modulation amplitude See Appendix A Modulation units Select unit of measure for modulation When extinction ratio is selected o Ratio o dB o Percentage When Optic...

Страница 25: ...Options The View Options menu enables the user to change the oscilloscope display The following settings can be specified or modified to customize your view Mode Dot Connect Measurements are displayed as a point to point straight line plot Persistence Measurements are displayed as individual dots in the plot window Delay the minimum time delay from the trigger event to the measure event Range the ...

Страница 26: ...re new measurements in VISI Measurements will be acquired until either the Single Stop command is issued or an error occurs This command affects the current tool only As shown below you may also display multiple windows to allow monitoring of more than one channel Adding a view opens a new default tool window associated with the active tool There may be many opened window views of one tool but all...

Страница 27: ... in Single Mode fiber 5 Over the range of 18 to 3 dBm at 850 nm or over the range of 22 to 3 dBm for 1310 and 1550 nm operation 6 Measured by 650 fs FWHM mode locked laser impulse 7 Calculated 3 dB frequency response from an FFT of impulse response 8 Full Bandwidth 20 dB amplifier positions selected 9 Measured with 20 GHz oscilloscope 10 Peak to Peak ISI contribution simulated from mode locked las...

Страница 28: ...ical OE 2 Responsivity versus Wavelength OE 2 Impulse Response to a 650 femtosecond mode locked laser impulse full bandwidth 20 dB amplifier selected Notes A Typical measurements provide non warranted information about system performance or capabilities B Wavecrest continually engages in research related to product improvement New material production methods and design refinements are introduced i...

Страница 29: ...sh language IEEE 488 2 commands The command list is shown in Appendix III Environmental Requirements Temperature Range Operating 15 C to 35 C Storage 40 C to 55 C Humidity 0 85 RH non condensing Ventilation A minimum of two inches of unobstructed airflow must be maintained on each side and rear panel of the instrument air inlet and exhaust openings to provide adequate ventilation for the OE 2 To m...

Страница 30: ...on factory and one will be provided Fuse Replacement The IEC plug in at the back of the OE 2 provides the input connection for the AC power cord A small compartment on the IEC plug houses two Wickman 2AT 250V fuses 5x20mm To gain access to the fuses remove the power to the OE 2 and disconnect the power cord With a small screwdriver pry open the fuse compartment on the IEC plug Remove the fuses and...

Страница 31: ...e current Filter Amplifier Wavelength settings to register 0 or 1 Register 0 is the Power up state of the OE 2 STB Status Byte Query TST NS ESE NS IDN Identification Query OPC Operation Complete Command OPT NS RST Reset SRE NS TRG NS WAI NS Note NS Not Supported Table B2 WAVECREST Common Commands Command Command Syntax Query Syntax SYSTEM HEADer LONGform VERsion SYSTEM HEADER ON OFF 1 0 LONGFORM O...

Страница 32: ...er in the table MODEL refers to the of channels SING or DUAL VERSION refers to the hardware release 6 charactrers BXX XX for Beta and RXX XX for production FILTer Return the current filter setting string AMPLifier Return the current amplifier setting string WAVElength Returns a string representing the floating point value of the wavelength ACResponse Returns a string representing the AC Response f...

Страница 33: ...annel OE 2 x may only take on a value of 1 ACResponse Channel subcommand that provides a query response only The AC response of the OE 2 Channel is determined from the current wavelength filter and amplifier settings This constant in units of W V is used to convert the electrical output of the OE 2 in volts to optical input power When combined with the average power reading the level and magnitude...

Страница 34: ...he average power measurement Any wavelength setting that does not match the input optical wavelength will result in an incorrect average power reading Wavelength units are meters Example write CHAN1 WAVE 1550E 9 SYSTEM Root command for system wide commands ADFormat System subcommand that sets or reads the current A D format When set to BITS the AVEP command returns the counts from the A D converte...

Страница 35: ...C L FC 1300 nm dBm 9 5 OMA mW 4 320 Fibre Channel 200 SM LC L FC2X 1300 nm dBm 11 7 OMA mW 4 160 Fibre Channel 100 M5 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 100 M6 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 200 M5 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Fibre Channel 200 M6 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Infiniband 1X SX IB 850 nm dBm 2 OMA mW 0 196 150 Infiniban...

Страница 36: ... Channel 200 M5 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Fibre Channel 200 M6 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Infiniband 1X SX IB 850 nm dBm 2 OMA mW 0 196 150 Infiniband 1X LX IB 1300 nm dBm 2 OMA mW 0 186 150 Infiniband 4X SX IB 850 nm dBm 2 OMA mW 0 150 150 Infiniband 12X SX IB 850 nm dBm 2 OMA mW 0 150 150 1 Leave blank for user setting 2 Not specified or multiple specs in the standar...

Страница 37: ...320 Fibre Channel 200 SM LC L FC2X 1300 nm dBm 11 7 OMA mW 4 160 Fibre Channel 100 M5 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 100 M6 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 200 M5 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Fibre Channel 200 M6 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 1 Leave blank for user setting 2 Not specified or multiple specs in the standard leave blan...

Страница 38: ...320 Fibre Channel 200 SM LC L FC2X 1300 nm dBm 11 7 OMA mW 4 160 Fibre Channel 100 M5 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 100 M6 SN I FC 850 nm dBm 10 OMA mW 0 156 300 Fibre Channel 200 M5 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 Fibre Channel 200 M6 SN I FC2X 850 nm dBm 10 OMA mW 0 196 150 1 Leave blank for user setting 2 Not specified or multiple specs in the standard leave blan...

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