Tektronix P6723, P6703B, P6701B User Manual

Service Manual

P6701B, P6703B & P6723
O/E Converters

070-9892-03

Warning

The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.

*P070989203*

070989203

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 pri ce change privileges reserved.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077

TEKTRONIX and TEK 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 loc ations.

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 incompat ible 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 W ARRANTY 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 priori ty 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

H Priced well below the cost of a single repair or calibration

H Avoid delays for service by eliminating the need for separate purchase authorizations from your company

H 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

Table of Contents

General Safety Summary iii...................................

Preface v...................................................

Related Manuals v.................................................

Contacting Tektronix v.............................................

P6701B and P6703B Sp ecifications 1...........................

Warranted Characteristics 1..........................................

Typical Characteristics 2............................................

Nominal Characteristics 4...........................................

P6723 Specifications 5.......................................

Warranted Characteristics 5..........................................

Typical Characteristics 6............................................

Nominal Characteristics 6...........................................

P6701B and P6703B Performance Verification 7.................

Equipment Required 7..............................................

Noise Equivalent Power 8...........................................

Output Zero 9.....................................................

DC Conversion Gain 9.............................................

AC Conversion Gain 10.............................................

P6723 Performance Verification 13..............................

Equipment Required 13..............................................

Output Amplitude 14................................................

Maintenance 17..............................................

Cleaning the Optical Connectors 17....................................

Cleaning the External Parts 18........................................

Handling 18.......................................................

Replacing TekProbe Interface Pins 19..................................

Removing and Replacing the TekProbe Interface Collar 20.................

Options 21..................................................

Replaceable Parts 23..........................................

P6701B, P6703B, and P6723 Service Manual

i

Table of Contents

ii

P6701B, P6703B, and P6723 Service Manual

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.

Only qualified personnel should perform service procedures.

ToAvoidFireor

Personal Injury

Symbols and Terms

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings 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.

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.

P6701B, P6703B, and P6723 Service Manual

iii

General Safety Summary

Symbols on the Product. The following symbols may appear on the product:

WARNING

High Voltage

Protective Ground

(Earth) Terminal

CAUTION

Refer to Manual

Double

Insulated

iv

P6701B, P6703B, and P6723 Service Manual

Preface

Related Manuals

Contacting Tektronix

This manual contains specifications and procedures for servicing the P6701B,
P6703B, and P6723 O/E C onverters.

For operating instructions, refer to the P6701B, P6703B, and P6723 Instruc-
tions (070-9890-XX).

Phone [phone]*

Address Tektronix, Inc.

Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA

Web site www.tektronix.com

Sales support 1-800-833-9200, select option 1*

Service support 1-800-833-9200, select option 2*

Technical support Email: techsupport@te ktronix.com

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific time

* This phone number is toll free in North America. After office hours, please leave a

voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.

P6701B, P6703B, and P6723 Service Manual

v

Preface

vi

P6701B, P6703B, and P6723 Service Manual

P6701B and P6703B Specifications

The specifications in Tables 1 through 3 apply to a P6701B or P6703B O/E
converter. The converter must have a warm-up period of at least 20 minutes and
be in an environment that does not exceed the limits described in Table 1.

Specifications for the P6701B and P6703B O/E converters fall into three
categories: warranted, typical, and nominal characteristics.

Warranted Characteristics

Warranted characteristics (Table 1) describes guaranteed performance within
tolerance limits or certain type-tested requirements. Warranted characteristics
that have checks in the Performance Verification section of the service manual
(070-9892-XX) are marked with the n symbol.

Table 1: P6701B and P6703B warranted electrical characteristics

DC optical input dynamic range DC electrical out will m eet conversion gain specifications up to

11 mW (0 dBm) peak optical power input

Absolute maximum non-destructive optical input 10 mW average power; 20 mW peak power

n DC conversion gain P6701B: 1 V/mW ± 8% at DC, 780 nm

P6703B: 1 V/mW ± 8% at DC, 1310 nm

n AC conversion gain P6701B: 1 V/mW ± 8%, with ≤ 100 W

780 nm

P6703B: 1 V/mW ± 8%, with ≤ 100 W
1310 nm

n Output zero ≤±1mVinto50Ω,20to25_ C

n Noise equivalent power

(with 1 GHz low-pass filter)

Output impedance 50 Ω ± 10%

Temperature Operating: 0 to +50_ C

P6701B: ≤ 0.87 W

(≤ 28 pW Hz)

P6703B: ≤ 0.59 W

(≤ 19 pW Hz

Nonoperating: --40 to +71_ C

RMS

RMS



)

optical modulation,

P-P

optical modulation,

P-P

P6701B, P6703B, and P6723 Service Manual

1

P6701B and P6703B Specifications

Table 1: P6701B and P6703B warranted electrical characteristics (cont.)

Humidity Operating: 0--90% RH, tested at

+30to+50_ C

Nonoperating: 0--90% RH, tested at
+30to+60_ C

Altitude Operating: 4,572 m (15,000 ft)

Nonoperating: 15,240 m (50,000 ft)

Typical Characteristics

Typical characteristics (Table 2) describe typical but not guaranteed performance.

Table 2: P6701B and P6703B typical electrical characteristics

Effective wavelength range P6701B: 500 to 950 nm

P6703B: 1100 to 1650 nm

Wavelength dependent gain SeeFigure1

Optical bandwidth P6701B: ≥ 1.0 GHz

P6703B: ≥ 1.2 GHz

Rise time P6701B: ≤ 475 ps

P6703B: ≤ 390 ps

(peak optical signal input < 100 W

Aberrations ≤±15% peak optical signal input < 200 W

P-P

)

P-P

2

P6701B, P6703B, and P6723 Service Manual

P6701B and P6703B Specifications

P6701B

1.2

1.1

1.0

0.9

0.8

0.7

0.6

Relative Conversion Gain

0.5

0.4

0.3

0.2
400 500 600 700 800 900 1000

~ 0.8 at 850nm

Wavelength (nm)

P6703B

1.2

1.1

1.0

0.9

0.8

0.7

0.6

Relative Conversion Gain

0.5

0.4

0.3

0.2
1000 1200 1400 1600

Wavelength (nm)

~ 1.1 at 1550 nm

Normalized to 1310nm at 1 V/mW

Normalized to
780nm at 1 V/mW

Figure 1: Typical wavelength dependent gain (25_ C ambient)

P6701B, P6703B, and P6723 Service Manual

3

P6701B and P6703B Specifications

Nominal Characteristics

Nominal characteristics (Table 3) describe guaranteed traits, but the traits do not
have tolerance limits.

Table 3: P6701B and P6703B nominal electrical characteristics

Optical input coupling Accepts up to 62.5 m core diameter, Numerical Aperture ≤ 0.29

Optical fiber dressing > 1 inch bend radius, not to exceed a bend radius of < 1 inch to

maintain performance.

Absolute non-destructive fiber bend 0.5 inch bend radius

DC conversion gain linearity < 3% deviation in DC conversion gain from 50 W to 1000 W

average optical input relative to conversion gain with 500 W
average optical power input.

Output zero drift ≤±1.5 mV with output load requirement met for ideally stable

optical input, 0--25_ C

Output load requirement 50 Ω ± 1%

4

P6701B, P6703B, and P6723 Service Manual

P6723 Specifications

The specifications in Tables 4 through 6 apply to a P6723 O/E converter. The
converter must have a warm-up period of at least 20 minutes and be in an
environment that does not exceed the limits described in Table 4.

Specifications for the P6723 O/E converter fall into three categories: warranted,
typical, and nominal characteristics.

Warranted Characteristics

Warranted characteristics (Table 4) describes guaranteed performance within
tolerance limits or certain type-tested requirements. Warranted characteristics
that have checks in the Performance Verification section of the service manual
(070-9892-XX) are marked with the n symbol.

Table 4: P6723 warranted electrical characteristics

Optical sensitivity -- 8.0 dBm maximum average optical power,

-- 28 dBm minimum average optical power

Output rise time and fall time ≤ 455 ps

n Output amplitude Minimum: ≥ 690 mV

Maximum: ≤ 1.1 V

Output impedance 50 ± 10%

Output VSWR < 1.5:1 from 10 MHz to 1 GHz

< 2.0:1 from 1 GHz to 2 GHz

Temperature Operating: 0 to +50_ C

Nonoperating: --40 to +71_ C

Humidity Operating: 0--90% RH, tested at

+30to+50_ C

Nonoperating: 0--90% RH, tested at
+30to+60_ C

Altitude Operating: 4,572 m (15,000 ft)

Nonoperating: 15,240 m (50,000 ft)

1

Measured with an optical input using 223- 1 pseudorandom word having a 50% duty cycle.

P-P

P-P

1

P6701B, P6703B, and P6723 Service Manual

5

P6723 Specifications

Typical Characteristics

Typical characteristics (Table 5) describe typical but not guaranteed performance.

Table 5: P6723 typical electrical characteristics

Effective wavelength range 1100 to 1570 nm

Aberrations ≤±15%, 20%

P-P

total

Nominal Characteristics

Nominal characteristics (Table 6) describe guaranteed traits, but the traits do not
have tolerance limits.

Table 6: P6723 nominal electrical characteristics

Optical input coupling Accepts up to 62.5 m core diameter, Numerical Aperture ≤ 0.29

Optical data rate 20 MB/s minimum

650 Mb/s maximum

Optical fiber dressing > 1.5-inch bend radius

Absolute non-destructive fiber bend 0.5-inch bend radius

Output load requirement 50 Ω ± 1%, AC or DC coupled

1

Measured with an optical input using 223- 1 pseudorandom word having a 50% duty cycle.

1

1

6

P6701B, P6703B, and P6723 Service Manual

P6701B and P6703B Performance Verification

Use the following procedures to verify the warranted specifications of the
P6701B and P6703B O/E converters. Before beginning these procedures, refer to
page 12 and photocopy the test record and use it to record the performance test
results. The recommended calibration interval is one year.

These procedures test the following specifications:

H Noise equivalent power

H Output zero

H DC conversion gain

H AC conversion gain

Equipment Required

Table 7 lists the equipment required to perform the performance verification
procedure. The types and quantities of connectors may vary depending on the
specific equipment you use.

The instrument should be given a 20 minute warm up period and ambient
temperature must be between 20 and 30 degrees C.

Table 7: Test equipment

Description Minimum requirements Example product

Optical power meter with
head and adapters

P6701B only: 780 nm cal
source

P6701B only: 850 nm cal
source

Accuracy > 2.5%, resolution >
5 pW, Max power > 1 mW, cali­brated from 700 nm -- 1600 nm

output > 200uW (CW)1,
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

output > 200uW1,
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

HP 8153A with power
sensor HP 81532A and
HP 81531A

P6701B, P6703B, and P6723 Service Manual

7

P6701B and P6703B Performance Verification

Table 7: Test equipment (cont.)

Description Example productMinimum requirements

P6703B only: 1310 nm cal
source

output > 200uW1,
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

P6703B only: 1550 nm cal
source

RF power meter noise<.1mV,BW>4GHz HP 437B with power sensor

P6703B only: 1300 nm
impulse generator

P6701B only: 850 nm
impulse generator

Sampling oscilloscope 11K (1140X, CSA40xX, or

Adjustable optical
attenuator

Digital voltmeter 4 1/2 digit Tektronix DMM916

50 ohm termination ± 1% 011-0049-01

Optical cable FC-FC multimode, 62.5um, 2

Inline optical adapter FC female to FC female 131-5039-00

TekProbe Power Supply Tektronix 1103

output > 200uW (CW)1,
stability > 0.1 dB over 5 minutes,
modulated square wave @ 10 kHz
with off modulation at zero-light
level

4 decades, 50um core fiber, FC­style connectors

meters

HP 8481D

OIG 502

OIG 501

DSA60X)

JDS 5000L with 62 m
fiber with FC connectors

174-2322-00

Noise Equivalent Power

8

Low-pass filter 1GHz Mini Circuits SLP 1000

1

CW and modulated mode available: modulation with OFF level at or below 0.1uW,
optical falltime < 1us

1. Power the P670XB under test using an 1103 Tekprobe power supply.

2. Connect the P670XB output channel from the 1103 power supply to the

power meter input with the 1 GHz filter in series with this connection.

3. With the dust cover on the input to the P670XB, the power meter reading
should be ≤ 15 nW for the P6701B and ≤ 7 nW for the P6703B.

P6701B, P6703B, and P6723 Service Manual

Output Zero

DC Conversion Gain

P6701B and P6703B Performance Verification

1. Attach 1103 powered P670XB output to voltmeter with 50 ohm termination.

2. Install optical dust cover on input to P670XB under test.

3. Check that output voltage is ≤ 1mV.

NOTE. Make sure that the optical connector ends of both the fiber jumpers and
the input fiber of the O/E converter under test are well cleaned before perform­ing this step. Use isopropyl alcohol, lint-free lense paper and clean compressed
air to clean the fiber ferrule ends. Refer to page 17 for the recommended
cleaning procedure.

P6701B

1. Connect 780 nm laser to attenuator.

NOTE. The fiber bend radius of the P670XB fiber input should lay with >1-inch
bend radius along the fiber’s entire length. Although this precaution must be
maintained throughout the entire PV procedure, it is especially important for this
step in order to accurately adjust and measure DC-conversion gain of the
P670XB.

2. Connect FC connector of the optical attenuator to FC-receptacle of the
optical power meter using the optical cable. Use the appropriate optical
power meter sensing head with calibrated measurement for a wavelength
span including 780 nm and 850 nm. Be sure the optical power meter
wavelength setting is at 780 nm.

3. Adjust attenuator or the optical source source so that the power meter reads
100 W.

4. Move the FC fiber end (the one now adjusted to 100 W average power)
from the optical power meter and connect to the P670XB input under test by
using the FC-FC inline female-female optical adapter.

5. Attach voltmeter with 50 ohm termination to 1103 powered P670XB output.

6. Check for 100 mV reading on voltmeter, ± 8%. (The 780 nm conversion gain

is 1.00 V/mW.)

P6701B, P6703B, and P6723 Service Manual

9

P6701B and P6703B Performance Verification

P6703B

1. Connect 1310 nm laser to attenuator.

NOTE. The longer wavelengths of 1310 nm and especially 1550 nm are more
sensitive to loss in fiber due to bending of the fiber than the short wavelength.
The fiber bend radius of the P670XB fiber input should lay with >1-inch bend
radius along the fiber’s entire length. Although this precaution must be
maintained throughout the entire PV procedure, it is especially important for this
step in order to accurately adjust and measure DC-conversion gain of the
P670XB.

2. Connect FC connector of the optical attenuator to the FC receptacle of the
optical power meter using optical cable; use the appropriate optical power
meter sensing head with calibrated measurement for a wavelength span
including 1310 nm and 1550 nm. Be sure the optical power meter wave­length setting is at 1310 nm.

AC Conversion Gain

3. Adjust the attenuator or optical source so that the power meter reads 100 W.

4. Move the FC fiber end (the one now adjusted to 100 W average power)

from the optical power meter and connect to the P670XB input under test by
using the FC-FC inline female-female optical adapter.

5. Attach voltmeter with 50 ohm termination to 1103 powered P670XB output.

6. Check for 100 mV reading on voltmeter, ± 8%. (The 1310 nm Conversion

Gain is 1.00 V/mW.)

1. Connect the probe under test to the 11K series oscilloscope and to the cal
source.

H If the unit under test is a P6701B, connect the 850 nm modulated laser

source to the optical attenuator input. Connect the output of the optical
attenuator to the P6701B input via an inline adapter.

H If the unit under test is a P6703B, connect the 1310 nm modulated laser

source to the optical attenuator input. Connect the output of the optical
attenuator to the P6703B input via an inline adapter.

10

2. Adjust the laser cal source to provide a 10KHz to 20KHz optical square
wave on the scope. Adjust the optical attenuator so that the total peak-to­peak signal from the P670XB is about 200 mV (or 200 W if the vertical
units displayed are “W”).

P6701B, P6703B, and P6723 Service Manual

P6701B and P6703B Performance Verification

3. Set the oscilloscope for 5 us/div on the horizontal scale and 5 mV/div (or
5 uW/div) for the vertical scale. Trigger the scope on the negative edge of
the trace and set ground to the middle of the screen. This is equivalent to
1%/div.

4. Check that the OFF level of the square wave at approximately 5 us after the
90% fall time point is within 16 mV (8%) of the ground level (center line).

P6701B, P6703B, and P6723 Service Manual

11

P6701B and P6703B Performance Verification

Test record

Probe Model/Serial Number: Certificate Number:
Temperature: RH %:
Date of Calibration: Technician:

Performance test Minimum Incoming Outgoing Maximum

Noise Equivalent Power

Output zero N/A 1mV

DC conversion gain 92 mV 108 mV

AC conversion gain -- 1 6 m V 16 mV

N/A 15 nW (P6701B)

7 nW (P6703B)

12

P6701B, P6703B, and P6723 Service Manual

P6723 Performance Verification

Use the following procedure to verify the warranted specification (output
amplitude) of the P6723 O/E converter. Before beginning these procedures, refer
to page 15 and photocopy the test record and use it to record the performance test
results. The recommended calibration interval is one year.

Equipment Required

Table 8 lists the equipment required to perform the performance verification
procedure. The types and quantities of connectors may vary depending on the
specific equipment you use.

The instrument should be tested at an ambient temperature between 20 and 30
degrees C.

Table 8: Test equipment

Description Minimum requirements Example product

Optical power meter with
head and adapters

Accuracy > 2.5%, resolution >
5 pW, Max power > 1 mW, cali­brated from 700 nm -- 1600 nm

HP 8153A with power
sensor HP 81530A and
HP 81531A

1310 nm digital optical
signal source

Sampling oscilloscope oscilloscope with Tekprobe II

Adjustable optical
attenuator

Optical cable FC-FC multimode, 62.5 m, 2

52 MHz -- 622 MHz Tektronix CTS710/CTS750

interface

4 decades, 50 m core fiber,
FC-style connectors

meters

Tektronix TDS784x

JDS 5000L with 62 m
fiber with FC connectors

174-2322-00

P6701B, P6703B, and P6723 Service Manual

13

P6723 Performance Verification

Output Amplitude

NOTE. Make sure that the optical connector ends of both the fiber jumpers and
the input fiber of the O/E converter under test are well cleaned before perform­ing this step. Use isopropyl alcohol, lint-free lense paper and clean compressed
air to clean the fiber ferrule ends. Refer to page 17 for the recommended
cleaning procedure.

1. Using the fiber jumpers, connect the 1310 nm digital optical source to the
optical attenuator input. Connect the output of the optical attenuator to the
power meter.

2. With the 1310 nm digital optical source transmitting at 155 Mbits/sec (OC3),
adjust the optical attenuator so that the power meter indicates --20 dBm.

3. Disconnect the jumper end from the output of the attenuator and connect the
optical input connector of the P6723 to the output of the attenuator.

4. Connect the output of the P6723 to the input of the TDS784.

5. Set the TDS784 to 5 ns/div, 200 mV/div, triggered on the signal and use the

horizontal cursors to measure the peak-to-peak amplitude.

6. Check that the peak-to-peak output (steady state on to steady state off) is
≤ 1.1 V and ≥ 0.69 V.

14

P6701B, P6703B, and P6723 Service Manual

P6723 Performance Verification

Test record

Probe Model/Serial Number: Certificate Number:
Temperature: RH %:
Date of Calibration: Technician:

Performance test Minimum Incoming Outgoing Maximum

Output Amplitude

0.69 V 1.1 V

P6701B, P6703B, and P6723 Service Manual

15

P6723 Performance Verification

16

P6701B, P6703B, and P6723 Service Manual

Maintenance

To keep the P6701B, P6703B, and P6723 O/E Converters in good operating
condition, observe proper cleaning and handling techniques.

Cleaning the Optical Connectors

Small dust particles and oils can easily contaminate fiber-optic connectors and
reduce or block the signal. Take care to preserve the integrity 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-abrasive and leave no residue.

To reduce the need for cleaning, immediately replace protective caps on the
fiber-optic connectors when not in use.

Equipment Required

Procedure

Use the following items to clean the fiber-optic connectors:

H clean compressed air

H fiber-optic cleaning swabs

H isopropyl alcohol

Clean the fiber-optic connectors as follows:

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.

P6701B, P6703B, and P6723 Service Manual

17

Maintenance

NOTE. Cleaning kits for fiber-optic connectors are available from a number of
suppliers.

Cleaning the External Parts

Remove dirt with a soft cloth dampened in a mild detergent and water solution or
isopropyl alcohol.

CAUTION. To avoid damaging the probe, use only a mild detergent and water
solution or isopropyl alcohol; do not use any other solvents or abrasive
cleaners. Do not immerse the probe.

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.

The P6701B, P6703B, and P6723 O/E Converters can connect to optical fibers
with a core diameter of up to 62.5 m 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 24.)

18

P6701B, P6703B, and P6723 Service Manual

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 m, the O/E converters may still
couple light, but the mismatch in core diameter will cause lower conversion gain
andhighinsertionloss.

Replacing TekProbe Interface Pins

1. To remove the interface pin, grasp the pin with a pair of needle-nose pliers
and gently pull the pin out. See Figure 2.

2. To replace the pin, insert the new pin into the socket and press it in against a
hard surface.

Maintenance

Figure 2: Replacing TekProbe interface pins

3. The pin installed in the position shown in Figure 3 is 0.020 inch shorter than
the other pins. Be sure to install the correct pin in this position; instruments
with the TekProbe interface may report errors if a longer pin is in this
position. See the Replaceable Parts List that begins on page 23 for ordering
information

P6701B, P6703B, and P6723 Service Manual

19

Maintenance

Short pin

Figure 3: Location of short interface pin

Removing and Replacing the TekProbe Interface Collar

1. To remove the collar, firmly pull the collar off by hand.

2. To replace the collar, align the smaller group of pins with the smaller of the

two holes in the interface collar and align the tabs with the slots. Gently
press the two pieces together. See Figure 4.

Tab

Slot

Figure 4: Replacing the TekProbe collar

20

P6701B, P6703B, and P6723 Service Manual

Options

Option 95 documents the measurements taken during calibration.

Option FR documents the frequency response of the O/E converter.

P6701B, P6703B, and P6723 Service Manual

21

Options

22

P6701B, P6703B, and P6723 Service Manual

Replaceable Parts

3

2

1

Figure 5: Replaceable parts

1

Figure 6: Standard accessories

NOTE: Parts illustrated
with dashed lines are not
replaceable

2

2 3

1 2 3 4

5

6

Figure 7: Optional accessories

P6701B, P6703B, and P6723 Service Manual

7 8 9

23

Replaceable Parts

Replaceable parts list

Fig. &
index
number

5--1 131--3627--01 1 CONTACT,ELEC:GOLD PLATED TIP 18359 P--6158--1

--2 131--6353--00 1 CONTACT,ELEC:GOLD PLATED TIP 18359 P--6158--2

--3 205--0191--00 1 SHELL,ELEC CONN:BNC,ABS,DOVE GRAY 80009 205--0191--00

6--1 131--6252--00 1 CONN:FC TO FC SQUARE MOUNT

--2 131--6250--00 1 CONN:FC TO ST ADAPTER W/ZIRCONIA CERAMIC

--3 131--6251--00 1 CONN:SC TO FC SQUARE FLANGE ADAPTER

7--1 174--1497--00 1 CA ASSY,FBR OPT:SINGLE MODE,2M L

--2 174--3737--00 1 FIBER OPTIC:COUPLER, 1 X 2 SPLI TTER,

--3 011--0049--01 1 TERMN ,COAXIAL:50 OHM,2W,BNC 24931 28A123--1

--4 012--0482--00 1 CA ASSY,RF:COAXIAL,RFD,50

--5 015--0554--00 1 ADPTR,SMA,ELEC:FEMALE BNC TO MALE SMA 24931 29JP170-- 1

--6 119--5118-- 00 1 ATTEN,OPTICAL:30MM,L10DBFOR 1310/1550NM,FC

--7 020--2209--00 1 ACCESSORY KIT:CONNECTOR,OPTICAL,DIN TO FC

--8 ------------------ -- 1 1103 TekProbe Power Supply 80009 Order by Description

--9 ------------------ -- 1 FS156 or FS622 SDH/SONET filters 80009 Order by Description

Tektronix
part number

070--9890--XX 1 MANUAL,TECH:INSTRUCTIONS,4 LANGUAGES 80009 070--9890--XX

070--9892--XX 1 MANUAL, TECH:SERVICE,ENGLISH 80009 070-- 9892-- XX

174--1385--00 1 CA ASSY,FBR OPT:SGL MODE, 2M L,FC/PC

174--1386--00 1 CA ASSY,FBR OPT:SINGLE MODE,2M L,FC/PC--ST 80009 174--1386--00

174--1387--00 1 CA ASSY,FBR OPT:SGL MODE, 2M L,FC/PC--FC/PC 80009 174-- 1387-- 00

174--1388--00 1 CA ASSY,FBR OPT:SGL MODE, 2M

174--2322--00 1 CABLE,FIBER OPT:JUMPER,2 METER,62.5

174--2323--00 1 CABLE,FIBER OPT:JUMPER,2 METER,62.5

174--2324--00 1 CABLE,FIBER OPT:JUMPER,2 METER,62.5

Serial no.
effective

Serial no.
discont’d

Qty Name & description Mfr. code Mfr. part number

Standard accessories

ADAPTER,W/ZIRCONIA CERAMIC SLEEVE

SLEEVE

W/ZIRCONIA CERAMIC SLEEVE

0C5R7 CO92290

0C5R7 C032980

0C5R7 C002453

Optional accessories

FC/PC TO DIAMOND 2.5

DIAMOND3.5

L,FC/PC--BICONIC

MICRON,FC/PC TO FC/PC

MICRON,FC/PC TO BICONIC

MICRON,FC/PC TO SMA 906

WAVELENGTH INDEPENDENT, 90/10 RATIO, ATT.

0.1 DB, REFLE

OHM,(175--1455--00),36 L,BNC,MALE,STR,BOTH
ENDS,W/STRAIN RELIEF BO

CONN.FA100--35--10--HP,CTS710

SQUARE MOUNT ADAPTER,

80009 174--1497--00

80009 174--1385--00

80009 174--1388--00

62712 174--2322--00

62712 174--2322--00

62712 PC/SK--20--002A

0C5R7 3--0102--10--B--UFC--0

1-- UFC--01

TK2469 012--0482--00

0LK97 FA100--35--10--HP

80009 020--2209--00

24

P6701B, P6703B, and P6723 Service Manual

Replaceable Parts

Manufacturers cross index

Mfr.
code

0C5R7 ALCOA FUJIKURA LTD 150 RIDGEVIEW CIRCLE DUNCAN, SC 29334

0LK97 JDS FITEL INC 570 WEST HUNT CLUB RD NEPEAN, ONTARIO CA ONTARIO K2G 5W8

18359 PYLON CO. INC. 51 NEWCOMB ST ATTLEBORO, MA 02703--1403

24931 BERG ELECTRONICS INC BERG ELECTRONICS RF/COAXIAL DIV

62712 SEIKO INSTRUMENTS USA INC ELECTRONIC COMPONENTS DIV

80009 TEKTRONIX INC 14150 SW KARL BRAUN DR

TK2469 UNITREK CORPORATION 3000 LEWIS & CLARK HWY

Manufacturer Address City , state, zip code

2100 EARLYWOOD DR
PO BOX 547

2990 W LOMITA BLVD

PO BOX 500

SUITE 2

FRANKLIN, IN 46131

TORRANCE, CA 90505

BEAVERTON, OR 97077--0001

VANCOUVER, WA 98661

P6701B, P6703B, and P6723 Service Manual

25

Replaceable Parts

26

P6701B, P6703B, and P6723 Service Manual