Tektronix P6701B User manual

Instructions
P6701B, P6703B & P6723
O/E Converters
070-9890-01
1

Copyright Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX, TEK, and TEKPROBE are registered trademarks of
Tektronix, Inc.

WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of one (1) year from the date of shipment. If a
product proves defective during this warranty period, Tektronix, at its option, either will
repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the
defect before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to
a location within the country in which the Tektronix service center is located. Customer
shall be responsible for paying all shipping charges, duties, taxes, and any other charges for
products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY
TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF
THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR
HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Service Assurance
If you have not already purchased Service Assurance for this product, you may
do so at any time during the product’s warranty period. Service Assurance
provides Repair Protection and Calibration Services to meet your needs.
Repair Protection extends priority repair services beyond the product’s
warranty period; you may purchase up to three years of Repair Protection.
Calibration Services provide annual calibration of your product, standards
compliance and required audit documentation, recall assurance, and reminder
notification of scheduled calibration. Coverage begins upon registration; you
may purchase up to five years of Calibration Services.
Service Assurance Advantages
Priced well below the cost of a single repair or calibration
Avoid delays for service by eliminating the need for separate purchase
authorizations from your company
Eliminates unexpected service expenses
For Information and Ordering
For more information or to order Service Assurance, contact your Tektronix
representative and provide the information below. Service Assurance may not
be available in locations outside the United States of America.
Name VISA or Master Card number and expiration
Company date or purchase order number
Address Repair Protection (1,2, or 3 years)
City, State, Postal code Calibration Services (1,2,3,4, or 5 years)
Country Instrument model and serial number
Phone Instrument purchase date

P6701B, P6703B & P6723 Instructions 1
Table of Contents
General Safety Summary 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instruments with the TekProbe II Interface 12. . . . . . . . . . . . .
Instruments without the TekProbe II Interface 12. . . . . . . . . .
Operating Basics 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Safety 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Input 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Output 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Correcting for Conversion Gain 16. . . . . . . . . . . . . . . . . . . . . . . .
Setup 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P6701B and P6703B Specifications 20. . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Characteristics 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Characteristics 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P6723 Specifications 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Characteristics 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Characteristics 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2P6701B, P6703B & P6723 Instructions
General Safety Summary
Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it. To avoid
potential hazards, use this product only as specified.
To Avoid Fire or Personal Injury
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all
ratings and marking on the product. Consult the product manual for
further ratings information before making connections to the
product.
Do Not Operate Without Covers. Do not operate this product with
covers or panels removed.
Wear Eye Protection. Wear eye protection if exposure to high-intensity
rays or laser radiation exists.
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.

General Safety
P6701B, P6703B & P6723 Instructions 3
Safety Terms and Symbols
Terms in This Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that
could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you
read the marking.
WARNING indicates an injury hazard not immediately accessible as
you read the marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. These symbols may appear on the product:
ProtectiveGround
(Earth)Terminal CAUTION Refer to Manual Double Insulated
WARNING
High Voltage

4P6701B, P6703B & P6723 Instructions
Preface
This manual contains instructions and specifications for using the
P6701B, P6703B, and P6723 O/E Converters.
Related Manuals
For performance verification procedures, adjustment procedures, list
of replaceable parts, and other service information, refer to the
P6701B, P6703B, & P6723 Service Manual (070-9892-XX).
Contacting Tektronix
Product
Support For application-oriented questions about a Tektronix measurement product, call toll free in North
America:
1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
[email protected]
For product support outside of North America,
contact your local Tektronix distributor or sales
office.
Service
Support Contact your local Tektronix distributor or sales office. Or visit our web site for a listing of
worldwide service locations.
http://www.tek.com
For other
information In North America: 1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
To write us Tektronix, Inc.
P.O. Box 1000
Wilsonville, OR 97070-1000

P6701B, P6703B & P6723 Instructions 5
Getting Started
This section contains a description of the P6701B, P6703B, and
P6723 O/E Converters and information about features, options,
accessories, and proper installation.
Product Description
The P6701B, P6703B, and P6723 products (Figure 1) are optical-to-
electrical (O/E) converters that convert optical communication and
optical video signals into electrical signals for display on an
oscilloscope.
The P6701B analog converter accepts short wavelength signals
(500 to 950 nm) present in multimode fibers. Conversion gain of
1V/mW is calibrated at 780 nm.
The P6703B analog converter accepts longer wavelength signals
(1100 to 1600 nm) present in singlemode or multimode fibers.
Conversion gain of 1V/mW is calibrated at 1310 nm.
The P6723 digital converter views the digital content of optical
signals (1100 to 1600 nm) with data rates up to 650 Mb/s. The
P6723 converts the digital content of the optical signal to an
electrical signal with a constant voltage of approximately 1 Vp-p .
Figure 1: P6701B, P6703B, and P6723 O/E Converters

Getting Started
6P6701B, P6703B & P6723 Instructions
The P6701B, P6703B, and P6723 O/E Converters have the
TekProbe II interface which is standard on Tektronix TDS, 1140X,
and DSA600 series oscilloscopes. The interface supplies power to
the converter, selects the correct vertical scale (watts/division), and
automatically sets the 50 Wtermination on the oscilloscope input.
Figure 2 shows the input connector of the TekProbe II interface.
Figure 2: TekProbe II interface (input)
To adapt the P6701B, P6703B, and P6723 O/E Converters to
measurement instruments that do not have the TekProbe II interface,
order the Tektronix 1103 TekProbe Power Supply.

Getting Started
P6701B, P6703B & P6723 Instructions 7
Options
Table 1 lists the options available for the P6701B, P6703B, and
P6723 O/E Converters. These options must be ordered when you
purchase the O/E converter.
Table 1: Options
Accessory Description
Calibration data (Option 95). Option 95 documents the
measurements taken during calibration.
0
dB
Frequency
Frequency response data (Option FR). Option FR documents
the frequency response of the O/E converter.
Standard Accessories
Table 2 shows the standard accessories of the P6701B, P6703B, and
P6723 O/E Converters.

Getting Started
8P6701B, P6703B & P6723 Instructions
Table 2: Standard accessories
Accessory Description
FC–FC inline adapter. Adapter for connecting FC male to the FC
male input of the converters.
Replacement part number: 131-6252-00
ST–FC inline adapter. Adapter for connecting ST male to the FC
male input of the converters.
Replacement part number: 131-6250-00
SC–FC inline adapter. Adapter for connecting SC male to the
FC male input of the converters.
Replacement part number: 131-6251-00
Calibration certificate. A certificate of traceable calibration is
provided with every instrument shipped.
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Set of user instructions. (Includes this book) Provides
instructions for operating the P6701B, P6703B, and P6723 O/E
Converters in English, French, German, and Japanese.
Replacement part number: 070-9890-01
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Service information. Includes the performance verification
procedure list of replaceable parts (English only).
Replacement part number: 070-9892-02

Getting Started
P6701B, P6703B & P6723 Instructions 9
Optional Accessories
Table 3 lists the optional accessories available for the P6701B,
P6703B, and P6723 O/E Converters.
Table 3: Optional accessories
Accessory Description
F
iber
opt
ic
c
a
ble
s.
Assorte
d ju
m
p
er
c
a
bles
e
x
te
nd
t
h
e
i
npu
t
cable and adapt the for connection to types of cables or
connectors.
FC–Diamond 2.5 mm singlemode. 2 m fiber jumper cable
P rt mber 00
P
a
rt
nu
mber
: 174-1497-
00
FC–Diamond 3.5 mm singlemode. 2 m fiber jumper cable
Part number: 174-1385-00
FC
–ST
s
i
ng
le
mod
e
.2
m
f
iber
ju
m
p
er
c
a
ble
FC
–ST
s
i
ng
le
mod
e
.2
m
f
iber
ju
m
p
er
c
a
ble
Part number: 174-1386-00
FC–FC singlemode. 2 m fiber jumper cable
Part number: 174-1387-00
– ic ic i le e m iber m er c ble
FC
–
B
ic
on
ic
s
i
ng
le
mod
e
.2
m
f
iber
ju
m
p
er
c
a
ble
Part number: 174-1388-00
FC–FC multimode. 62.5 m, 2 m fiber jumper
Part number: 174-2322-00
–ic ic li e m m iber m er c ble
FC
–
B
ic
on
ic
mu
l
t
i
mod
e
.62.5 
m
, 2
m
f
iber
ju
m
p
er
c
a
ble
Part number: 174-2323-00
FC–SMA multimode. 62.5 m, 2 m fiber jumper cable
Part number: 174-2324-00
FC 3-port 10%/90% optical splitter for singlemode fiber.
Comes with FC connectors.
Part number: 174-3737-00

Getting Started
10 P6701B, P6703B & P6723 Instructions
Table 3: Optional accessories (cont.)
Accessory Description
1103 Power Supply. Order the 1103 power supply for
instruments that do not have the TekProbe Interface. Options are
available for the following countries or regions.
Standard. North America and Japan
Option A1. European
Option A2. UK
Option A3. Australia
Option A5. Switzerland
5
0 t
er
m
i
nat
i
on. T
ermi
na
tes
t
h
e
o
u
t
pu
t
o
f
t
h
e
11
0
3 p
o
w
er
supply to the required 50 Wif the oscilloscope does not have a
50 Winput setting.
Part number: 011-0049-01
50 precision BNC cable. Extends the output of the 1103
p
o
w
er
s
upp
ly
.
p
o
w
er
s
upp
ly
.
Part number: 012-0482-00
BNC female to SMA male adapter. Adapts BNC cable to SMA
connector.
Part number: 015-0554-00
10 dB in-line optical attenuator. Comes with FC connector.
Part number: 119-5118-00

Getting Started
P6701B, P6703B & P6723 Instructions 11
Table 3: Optional accessories (cont.)
Accessory Description
DIN-FC adapter. Adapter for connecting DIN male to the FC
male input of the converters.
Part number: 020-2209-00
SDH/SONET and FibreChannel filters. (P6701B and P6703B
only) Precision filters that provide nominal Bessel-Thompson
frequency response for the following SDH/SONET and
FibreChannel data rates:
FS156 (SDH/SONET). Filter for OC-3/STM-1 (155.52 Mb/s)
FS622 (SDH/SONET). Filter for OC-12/STM-4 (622.08 Mb/s)

Getting Started
12 P6701B, P6703B & P6723 Instructions
Installation
Before you connect the output of the P6701B, P6703B, and P6723
O/E Converters, determine whether or not your instrument has the
TekProbe II interface (see Figure 2 on page 6).
Instruments with the TekProbe II Interface
For instruments that have the TekProbe II interface, simply connect
the converter to the oscilloscope input. The interface provides
connections for power, signal, and scale factor coding.
NOTE. TDS 400 and TDS 400A series oscilloscopes always interpret
the P6701B, P6703B, and P6723 attenuation setting as 10 and
display units as V instead of mW. When you use the O/E converters,
divide the measurement (or scale factor) by 10 and interpert
measurements as milliwatts instead of volts.
Instruments without the TekProbe II Interface
For instruments that do not have the TekProbe interface, order the
optional 1103 TekProbe Power Supply. Accessories are also
available to terminate the output into the required 50 W.

P6701B, P6703B & P6723 Instructions 13
Operating Basics
This section presents the basic information necessary you need to
know to operate the P6701B, P6703B, and P6723 O/E Converters.
Operating Safety
WARNING. To avoid eye injury, wear eye protection if risk of
exposure to high-intensity rays or laser radiation exists.
Cleaning
Small dust particles and oils can easily contaminate fiber-optic
connectors and reduce or block the signal. Take care to preserve the
integrity of your connectors by keeping them free of contamination.
CAUTION. To prevent loss of optical power or damage to the
fiber-optic connectors, keep the connectors clean at all times.
When cleaning the connectors with a swab, use gentle circular
motions. Use only high quality cleaning supplies that are non-abra-
sive and leave no residue.
To reduce the need for cleaning, immediately replace protective caps
on the fiber-optic connectors when not in use.

Operating Basics
14 P6701B, P6703B & P6723 Instructions
To remove contamination, clean the fiber-optic connectors using the
following procedure:
EquipmentRequired
Clean compressed air
Fiber-optic cleaning swabs
Isopropyl alcohol
Procedure
1. Hold the can of compressed air upright and spray the can into the
air to purge any propellant.
2. Spray the clean compressed air on the connectors to remove any
loose particles or moisture.
3. Moisten a clean fiber-optic swab with isopropyl alcohol then
lightly swab the surfaces of the connectors.
4. Spray the clean compressed air on the connectors again to
remove any loose particles or isopropyl alcohol.
NOTE. Cleaning kits for fiber-optic connectors are available from a
number of suppliers.

Operating Basics
P6701B, P6703B & P6723 Instructions 15
Handling
Even though the fiber-optic cable of the P6701B, P6703B, or P6723
O/E Converter is protected by a jacket and strain relief, the
fiber-optic cable should be handled carefully at all times.
CAUTION. To avoid damaging the P6701B, P6703B, and P6723 O/E
Converters, take the following precautions:
Do not crush, crimp, or sharply bend the fiber optic cable.
Do not pull or yank the fiber-optic cable.
Do not drop the converter assembly since damage and misalignment
of the photodiode optical assembly can result. Store the converter in
a secure location when not in use.
Replace the protective cap on the connector when the converter is
not in use.
Optical Input
The P6701B, P6703B, and P6723 O/E Converters can be connected
to optical fibers with a core diameter of up to 62.5 mm through one
of the FC, ST, SC, or DIN adapters. Adapter cables that aid in
connecting many other popular optical connectors are also available.
(Refer to Optional Accessories on page 9.)
CAUTION. To maintain the high performance (low return loss) of the
O/E converter, connect an adapter and cable between the input of
the O/E converter and the device under test. When you make
connections to other devices, leave the adapter and cable in place to
protect the optical connector of the O/E converter from wear.
If you connect fiber cores larger than 62.5 mm, the O/E converters
may still couple light, but the mismatch in core diameter will cause
lower conversion gain and high insertion loss.

Operating Basics
16 P6701B, P6703B & P6723 Instructions
Electrical Output
The P6701B and P6703B O/E converters output approximately
1 V/mW across 50 Wat the nominal calibrated wavelength (780 nm
for the P6701B converter and 1310 nm for the P6703B converter).
The P6723 O/E converter provides a nominal NRZ (non return to
zero) signal (X1 Vp-p) that is AC-coupled to the 50 Woutput. The
P6723 converter provides a constant peak-to-peak amplitude
electrical output for long wavelength optical signals (1310/1550 nm)
ranging from –8 dBm to –28 dBm average optical power.
Correcting for Conversion Gain
You can compensate your measurement for wavelengths that have a
conversion gain other than one. For example, if you are using a
P6703B to measure a signal with a wavelength of 1550 nm, the
conversion gain at that wavelength is typically 1.1 V/mW versus
1.0 V/mW at 1310 nm (see Figure 7 on page 23). To correct the
measurement to 1 V/mW, multiply the measurement by 0.909 (the
reciprocal of 1.1).
If your measurement instrument is so equipped, you can automatical-
ly multiply displayed waveforms or measurements by the appropriate
correction factor. Refer to your instrument manual for details.