Teledyne Lecroy Everywhereyoulook OE6250G-M User manual

User Manual
OE6250G-M
Optical-Electrical
Converter

OE6250G-M Optical-Electrical Converter User Manual
© 2021 Teledyne LeCroy, Inc. All rights reserved.
Users are permitted to duplicate and distribute Teledyne LeCroy
documentation for internal training purposes only. Resale or unauthorized
duplication of Teledyne LeCroy documentation materials is strictly prohibited.
Teledyne LeCroy is a registered trademark of Teledyne LeCroy, Inc. Other
product or brand names are trademarks or requested trademarks of their
respective holders. Information in this publication supersedes all earlier
versions. Specifications are subject to change without notice.
933645-00 Rev A
oe6250g-m-user-manual.pdf
May, 2021

User Manual
i
Contents
Warranty ..............................................................................................................ii
OE6250G-M Overview ....................................................................................... 1
Key Features:........................................................................................................... 1
Compatibility ........................................................................................................... 1
Safety .................................................................................................................. 2
Operation ............................................................................................................ 3
Connecting the Unit ............................................................................................... 3
Controlling from the Oscilloscope....................................................................... 4
Care and Maintenance...................................................................................... 6
Cleaning the Converter Body................................................................................ 6
Cleaning and Connecting Optical Fibers............................................................ 6
Calibration Interval ................................................................................................. 7
Troubleshooting...................................................................................................... 7
Service ...................................................................................................................... 7
Certifications ........................................................................................................... 8

OE6250G-M Optical-Electrical Converter
ii
Warranty
THE WARRANTY BELOW REPLACES ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF
MERCHANTABILITY, FITNESS, OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR
USE. TELEDYNE LECROY SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT OR OTHERWISE. THE
CUSTOMER IS RESPONSIBLE FOR THE TRANSPORTATION AND INSURANCE
CHARGES FOR THE RETURN OF PRODUCTS TO THE SERVICE FACILITY. TELEDYNE
LECROY WILL RETURN ALL PRODUCTS UNDER WARRANTY WITH TRANSPORT
PREPAID.
The product is warranted for normal use and operation, within specifications,
for a period of one year from shipment. Teledyne LeCroy will either repair or, at
our option, replace any product returned to one of our authorized service
centers within this period. However, in order to do this we must first examine
the product and find that it is defective due to workmanship or materials and
not due to misuse, neglect, accident, or abnormal conditions or operation.
Teledyne LeCroy shall not be responsible for any defect, damage, or failure
caused by any of the following: a) attempted repairs or installations by
personnel other than Teledyne LeCroy representatives or b) improper
connection to incompatible equipment, or c) for any damage or malfunction
caused by the use of non-Teledyne LeCroy supplies. Furthermore, Teledyne
LeCroy shall not be obligated to service a product that has been modified or
integrated where the modification or integration increases the task duration or
difficulty of servicing the oscilloscope. Spare and replacement parts, and
repairs, all have a 90-day warranty.
Products not made by Teledyne LeCroy are covered solely by the warranty of
the original equipment manufacturer.

User Manual
1
OE6250G-M Overview
The OE6250G-M is designed to help troubleshoot optical to electrical signal
integrity issues at the board level. For system integrators who deal with both
electrical and optical signals in their product, the OE6250G-M provides
electrical measurements on optical signal and takes full advantage of the
Teledyne LeCroy oscilloscope tool set and the broad debugging capabilities of
the Teledyne LeCroy Serial Data Analysis packages.
Utilizing the proprietary ProLink interface, the OE6250G-M becomes an
integrated part of the oscilloscope. The Optical wavelength, dark calibration
and reference receiver functions are all controlled from the oscilloscope’s
touch screen. The oscilloscope provides power to the converter, so no external
power supply is needed.
Key Features:
•Frequency range DC to 36 GHz (electrical, -3 dB)
o36 GHz (Flatness-optimized response)
o25 GHz (4th-order Bessel-Thomson response)
•50/125 μm multi-mode or single-mode fiber input
•Broad wavelength range (830 to 1600 nm)
Compatibility
The OE6250G-M convertor is compatible with oscilloscope series:
•WaveMaster 8 Zi/Zi-A/Zi-B
•LabMaster 10 Zi/Zi-A
Operation of the product requires oscilloscope firmware v.8.3.0.0 or later.

OE6250G-M Optical-Electrical Converter
2
Safety
This symbol appears on the product or in its documentation to alert you to
important safety considerations.
CAUTION of potential damage to product, or WARNING of potential for
bodily injury. Attend to the accompanying information to protect against
injury or damage. Do not proceed until conditions are fully understood
and met.
The maximum input optical power must not exceed 10mW.Exceeding this
limit will result in permanent damage to the optical components.
When making optical connections, always clean the optical connector and
ensure the facet is free from dirt or impurities. See the instructions on p.6.
Do not install or terminate fibers while a light source is active. Care must be
taken to ensure that the instrument has been turned OFF before inspecting the
end face(s) of the instrument, or any optical patch cords connected to this
instrument. Never look directly into a live fiber, and ensure that your eyes are
protected at all times.
Check the connector type. Optical connectors used in the instrument are
FC/PC type. Ensure that you DO NOT connect FC/APC type connectors directly
to this instrument. Doing so will result in damaging the connector. A convertor
patch cord can be used in case FC/APC connectors need to be used.

User Manual
3
Operation
Connecting the Unit
To connect the converter to the oscilloscope:
1. Connect the power cable by
aligning the red dot on the
LEMO plug to the red mark on
the oscilloscope’s LEMO
receptacle and pushing until
you hear a click.
2. Connect one end of the 2.92
mm cable to the 2.92 mm
connector on the OE6250G-M
and the other to the 2.92 mm
connector on the oscilloscope.
3. Clean and connect the optical
fiber as explained on p.6.
NOTE: To disconnect power, pull
back the knurled sleeve on the
LEMO plug to release the lock and
hold it in the released position while
pulling the cable out of the
receptacle.

OE6250G-M Optical-Electrical Converter
4
Controlling from the Oscilloscope
After the connector is attached, the vertical scale shown on the Channel
descriptor box will automatically change to µW/div units. Turning the front
panel V/Div knob or changing the V/Div setting on the Cxdialog will adjust the
scale factor to give full dynamic range in µW/Div.
The OE6250G-M dialog behind the Cxdialog displays the converter’s attributes
and allows for the selection of the converter’s Dark Calibration, Reference
Receiver, and Optical Wavelength functions.
Dark Calibration
The OE6250G-M incorporates a Dark Calibration function to measure the channel
offset signal without any light present in the optical receiver.
The Set to Zero function resets the Dark Calibration value to zero. The Dark
Level field allows manual entry of the Dark Level offset (this will be overridden
by the “Dark Calibration” function).
Reference Receiver
The OE6250G-M’s frequency response is selectable:
•“Fourth Order Bessel Thomson” gives a response that is typically used
to emulate an optical reference receiver. In this mode, the bandwidth (-
3 dB point) is arbitrarily selectable between 1 GHz and 25 GHz
(depending on the oscilloscope having sufficient bandwidth).
•“Flat” gives a response that is designed to maximize the frequency-
domain flatness and bandwidth of the acquisition system. In this
mode, the bandwidth (-3 dB point) is arbitrarily selectable between 1
GHz and 36 GHz (dependent on the oscilloscope having sufficient
bandwidth).

User Manual
5
The plot below shows a comparison of both response modes (at their
maximum bandwidth setting).
05 10 15 20 25 30 35 40
Frequency (GHz)
-6
-5
-4
-3
-2
-1
0
1
Response (dB)
OE6250G-M: Nominal Compensated Response
4th-order Bessel-Thomson response
Flatness-opimized response
Optical Wavelength
The optical wavelength of the OE6250G-M can be selected between
830 nm and 1600 nm in increments of 10 nm.
The OE6250G-M is calibrated at 850 nm, 1310 nm, and 1550 nm.
Other wavelength responses are interpolated/extrapolated from the calibrated
values.

OE6250G-M Optical-Electrical Converter
6
Care and Maintenance
Cleaning the Converter Body
Clean only the exterior of the product using a soft cloth moistened with water
or an alcohol solution. Do not use harsh chemicals or abrasive elements. Under
no circumstances submerge the device or allow moisture to penetrate it.
CAUTION: Do not attempt to clean internal parts. Refer to qualified
service personnel.
Cleaning and Connecting Optical Fibers
CAUTION: Before connecting any fiber-optic cable to a port, inspect the
fiber using a fiber inspection microscope. Failure to do so may result in
permanent damage to the connectors and degradation in
measurements.
If the optical fiber is clean, proceed to connect it to the port. If the fiber is dirty,
clean it as follows:
1. Gently wipe the fiber end with a lint-free swab dipped in isopropyl alcohol.
2. Use compressed air to dry it completely.
3. Visually inspect the fiber end to ensure its cleanliness.
To safely connect optical fibers:
1. Carefully align the connector and port to prevent the fiber end from
touching the outside of the port or rubbing against other surfaces. If your
connector features a key, ensure that it is fully fitted into the port’s
corresponding notch.
2. Push the connector in so that the fiber-optic cable is firmly in place, thus
ensuring adequate contact. If your connector features a screw sleeve,
tighten the connector enough to firmly maintain the fiber in place.
CAUTION: Do not over tighten, as this will damage the fiber and the
port. If your fiber-optic cable is not properly aligned and/or connected,
you will notice heavy loss and reflection.

User Manual
7
Calibration Interval
The recommended calibration interval is one year.
Troubleshooting
Before returning a product as defective, do the following:
•Verify that the Teledyne LeCroy oscilloscope is running firmware v.
8.3.0.7 or higher. To verify the firmware version of your oscilloscope,
choose Utilities > Utilities Setup from the menu bar, then touch the
Status tab.
•Check that the power connector is plugged in and locked, and that the
2.92mm cable is connected.
Service
Defective products must be returned to a Teledyne LeCroy service facility for
diagnosis and repair or replacement. Defective products under warranty will be
repaired or replaced.
For a complete list of offices by country, including our sales & distribution
partners, visit: teledynelecroy.com/support/contact
Teledyne LeCroy
700 Chestnut Ridge Road
Chestnut Ridge, NY, 10977, USA
teledynelecroy.com
US Service and Support:
Ph: 800-553-2769 / 845-425-2000
FAX: [phone]
[e-mail]

Certifications
For the full list of current certifications, see the EC Declaration of Conformity
shipped with your product.
The probe is marked with this symbol to indicate that it complies
with the applicable European Union requirements to Directives
2012/19/EU on Waste Electrical and Electronic Equipment (WEEE).
For more information about proper disposal and recycling of your
Teledyne LeCroy product, visit teledynelecroy.com/recycle.
Unless otherwise specified, all materials and processes are compliant with
RoHS Directive 2011/65/EU in its entirety, inclusive of any further amendments
or modifications of said Directive.
933645-00 Rev A
May, 2021