Summary of Contents for Wavecrest OE-2
- Page 1 WAVECREST Corporation OE-2 Optical to Electrical Signal Converter User’s Guide and Reference Manual 200005-01 REV A...
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- Page 3 WAVECREST Corporation continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current product may differ in some respect from its published...
- Page 4 Wavecrest. License Grant. Wavecrest grants you a license to use one copy of the Software. USE means storing, loading, installing, executing or displaying the Software. You may not modify the Software or disable any licensing or control features of the Software.
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Page 5: Table Of Contents
OE-2™ User’s Guide and Reference Manual Table of Contents Preface Organization and Inspection ............v SECTION 1 Introduction ..................1 Features ..................1 OE-2 How the Works ..............2 Laser Safety ..................3 SECTION 2 Front and Back Panel Descriptions..........5 Front Panel Controls and Connectors .......... - Page 6 This page intentionally left blank...
- Page 7 Includes a series of tables that show the preprogrammed measurement limits for each OE-2 model. WARNING Operating the OE-2 outside of the maximum operational specifications published in Appendix A of this manual can damage the instrument. The Wavecrest Warranty does not cover damage resulting from improper operation or mishandling of the OE-2.
- Page 8 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,...
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Page 9: Section 1- Introduction
DTS or SIA system, the OE-2 enables accurate, high performance WAVECREST 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. -
Page 10: How The Oe-2 Works
The average current in the photo receiver is measured to determine the average optical power of the input signal and is available only through the GPIB interface. The signal gain in every filter and amplifier path in the OE-2 is measured and stored locally in the OE-2. These calibration values are used by WAVECREST’s... -
Page 11: Laser Safety
Laser Safety OE-2 Although the optical to electrical converter does not emit laser energy, it does process OE-2 optical signals from laser devices. Therefore, laser signals will be present at the inputs. These signals present retinal and/or personal hazards because they are invisible and might not be detected until injury to the eye or skin has occurred. - Page 12 This page intentionally left blank. | Section 1 | Introduction...
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Page 13: Section 2 - Front And Back Panel Descriptions
SECTION 2 – Front and Back Panel Descriptions OE-2 This section describes the front and back controls and connectors of the OE-2 Dual Channel Front panel Front Panel Controls and Connectors Filter Selection OE-2 routes the converted signal through low-pass filters to establish a finite, repeatable measurement... - Page 14 Over range LED/Signal LED Two LEDs on the front of the OE-2 indicate optical input signal status. The lower “SIGNAL” LED is lit when the OE-2 senses an optical signal. If the upper “OVERRANGE” LED is blinking red, the optical signal power is beyond the input range of the instrument and should be removed to prevent damage to the optical detector.
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Page 15: Back Panel Controls And Connectors
Back Panel Controls and Connectors OE-2 Back Panel AC Input Port IEC Inlet for AC cord. Connect to an AC source in the range of 100-240 VAC, 47-63 Hz. Fuse Primary AC fuse. Located inside of connector housing. Should be replaced with two Wickman 4AT/250V fuses (5x20 mm). - Page 16 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.
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Page 17: Instrument Set-Up And Measurement
SECTION 3 – Setup and Measurement OE-2 This section describes the set-up of the and provides instructions that enable the user to take a quick measurement for rapid familiarization with the instrument. In addition, this section describes the Virtual Instrument Signal Integrity™ (VISI) software tools... -
Page 18: Visi™ Software Setup And Configuration
VISI SOFTWARE SETUP Controller Mode Edit | Configuration Menu OE-2 SIA-3000™ SIA- In order for the to communicate with the using the GPIB bus, the 3000 must be in the “Controller” mode. To select Controller mode: Select on the Edit Configuration... -
Page 19: Manually Assigning Gpib Addresses
(see figure below). The fields in this dialog GPIB Address Assignment box will be blank unless device assignments were previously made. The GPIB Address OE-2’ dialog box manages the address settings for both the GPIB host and all Assignments Optical Configuration Dialog Box – GPIB Address Assignment... - Page 20 SIA-3000 , the should read: Optical Channel Assignment OE-2, GPIB Device 6, Port 1 Active Channel Ports left in the inactive state will still pass signals, but VISI software will not recognize the channel port. | Section 3 | Setup Measurement...
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Page 21: Setting Acquire Options
Setting Acquire Options OE-2 The Acquire Options dialog bar displays the settings for optical signal measurements. In setting the Acquire Options, note that “channel” refers to the DTS or channel. To set the Acquire Options: From the Main Dialog Bar, select Utilities. The Utilities dialog bar will be displayed. - Page 22 Select the channel to view. (“Channel” refers to the DTS or OE-2 channel.) The software will poll the configured to that channel to determine which filter bank options are installed. WAVECREST ’s VISI software has preprogrammed set-ups for several popular communication standards, including Fibre Channel, Gigabit Ethernet, and Infiniband.
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Page 23: External Calibration
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 OE-2 GPIB Address and Optical Channel Assignments are correct (under pull-down menu) -
Page 24: Output Setting Options
Output Setting Options dialog bar enables the user to set the units of measure, such as milliwatt or Output Settings microwatts, for optical measurements. Pass/fail limits for optical power, modulation and rise and fall time measurements are accessible through this selection. To access the , select the button on the Dialog Bar. -
Page 25: Trigger Options
Trigger Options The Trigger Dialog Bar enables the user to set up trigger sources and conditions on the DTS or instrument. Select trigger source. Trigger Select Auto to set the trigger threshold voltage to Trigger Method the 50% voltage point of the Pulsefind values on the selected trigger channel. -
Page 26: Taking A Measurement
Taking a Measurement Two types of measurements are available once the setup of the instrument has been completed and are available from the Tool Bar or the Action pull-down menu. • Single/Stop command (Action menu) Use this command to acquire a single measurement in VISI. It is also used to stop a series of measurements from being taken after the Run command is issued. -
Page 27: Appendix A Specifications And Maintenance
Infiniband filter and 20 dB amplifier positions selected. 11. Per amplifier at 100 MHz. Low Pass Filter Response Characteristics The OE-2 includes four switchable filters. The following filter options are available. A fifth path provides full-bandwidth operation (no filter). Standard... - Page 28 OE-2 will comply with these specifications after a 30-minute warm-up period. OE-2 Frequency Response (calculated from the FFT of a 650 femtosecond mode-locked laser impulse; full bandwidth, 20 dB amplifier selected). | APPENDIX A | Specifications...
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Page 29: Power Requirements
The OE-2 includes an IEEE-488 interface. The connector and address selection switch are located on the rear panel of the instrument. Power Requirements The OE-2 operates on 100-120 VAC & 200-240 VAC (±10%), 47-63Hz. The OE-2 is rated for 275 Watts. Fuses: (2) two 2AT/250V, 5 x 20 mm. Power supply is auto ranging. -
Page 30: Fuse Replacement
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. -
Page 31: Appendix Bgpib Commands
GPIB Commands APPENDIX B - The following GPIB commands are supported in the OE-2. Table B1. IEEE.2 Common Commands Command Definition *CLS Clear Status *ESR? Event Status Register Query *LRN? *OPC? Operation Complete Query *RCL *rcl <0/1> Recall settings from register 0 or register 1 *SAV *sav <0/1>... - Page 32 No write command. :AVEPwr ? Returns a string representing the floating point value of the current average optical power into the OE-2. The measurement units are selected by the ADF System subcommand and should be set to watts unless a calibration is underway.
- Page 33 CHANnel (CHANx): Root command that specifies the channel to which a subcommand applies. On a Dual Channel OE-2, ‘x’ may take on values of ‘1’ or ‘2’. On a Single Channel OE-2, ‘x’ may only take on a value of ‘1’.
- Page 34 See the calibration example under the CALIBRATE root command. TYPE: Channel subcommand that provides a query response only. The type (or option) of the OE-2 channel is returned in a ‘/’ delimited field. The return string contains the filter positions that are available for the specified channel.
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Page 35: Appendix C Preprogrammed Measurement Limits
Preprogrammed Measurement Limits APPENDIX C – The following Charts show the preprogrammed measurement limits for each OE-2 model. See Section 3 for more information on the measurement limit presets. Table C1. OE-2 Option 1 Average Power Modulation Modulation Modulation Rise/Fall times... - Page 36 (1) Leave blank for user setting (2) Not specified or multiple specs in the standard—leave blank (3) Future product—reserved. Do not show in OE-2 software, available with SIA-3000 (4) The Fibre Channel standard offers a tradeoff between spectral center wavelength, RMS spectral width, and minimum OMA.
- Page 37 (1) Leave blank for user setting (2) Not specified or multiple specs in the standard—leave blank (3) Future product—reserved. Do not show in OE-2 software, available with SIA-3000 (4) The Fibre Channel standard offers a tradeoff between spectral center wavelength, RMS spectral width, and minimum OMA.
- Page 38 (1) Leave blank for user setting (2) Not specified or multiple specs in the standard—leave blank (3) Future product—reserved. Do not show in OE-2 software, available with SIA-3000 (4) The Fibre Channel standard offers a tradeoff between spectral center wavelength, RMS spectral width, and minimum OMA.
- Page 39 WAVECREST Corporation World Headquarters: West Coast Office: Europe Office: Japan Office: 7626 Golden Triangle Drive 1735 Technology Drive, Ste. 400 Hansastrasse 136 Otsuka Sentcore Building, 6F Eden Prairie, MN 55344 San Jose, CA 95110 D-81373 München 3-46-3 Minami-Otsuka TEL: TEL:...
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