Tektronix TV Converter Box 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  
 
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  
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  
Company  
Address  
City, State, Postal code  
Country  
Phone  
VISA or Master Card number and expiration  
date or purchase order number  
Repair Protection (1,2, or 3 years)  
Calibration Services (1,2,3,4, or 5 years)  
Instrument model and serial number  
Instrument purchase date  
 
Table of Contents  
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
iii  
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
v
v
v
P6701B and P6703B Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Warranted Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Nominal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
1
1
2
4
P6723 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Warranted Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Nominal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
5
5
6
6
P6701B and P6703B Performance Verification . . . . . . . . . . . . . . . . .  
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Noise Equivalent Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Output Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
DC Conversion Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
AC Conversion Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
7
7
8
9
9
10  
P6723 Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Output Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
13  
13  
14  
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Cleaning the Optical Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Cleaning the External Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Replacing TekProbe Interface Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Removing and Replacing the TekProbe Interface Collar . . . . . . . . . . . . . . . . .  
17  
17  
18  
18  
19  
20  
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
21  
23  
i
P6701B, P6703B, and P6723 Service Manual  
 
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.  
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.  
To Avoid Fire or  
Personal Injury  
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.  
Symbols and Terms  
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.  
iii  
P6701B, P6703B, and P6723 Service Manual  
 
General Safety Summary  
Symbols on the Product. The following symbols may appear on the product:  
WARNING  
Protective Ground  
(Earth) Terminal  
CAUTION  
Double  
High Voltage  
Refer to Manual  
Insulated  
iv  
P6701B, P6703B, and P6723 Service Manual  
 
Preface  
This manual contains specifications and procedures for servicing the P6701B,  
P6703B, and P6723 O/E Converters.  
Related Manuals  
For operating instructions, refer to the P6701B, P6703B, and P6723 Instruc-  
tions (070-9890-XX).  
Contacting Tektronix  
Phone  
1-800-833-9200*  
Address  
Tektronix, Inc.  
Department or name (if known)  
14200 SW Karl Braun Drive  
P.O. Box 500  
Beaverton, OR 97077  
USA  
Web site  
Sales support  
Service support  
Technical support  
1-800-833-9200, select option 1*  
1-800-833-9200, select option 2*  
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.  
v
P6701B, P6703B, and P6723 Service Manual  
 
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 meet 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  
P6701B: 1 V/mW 8% at DC, 780 nm  
n DC conversion gain  
P6703B: 1 V/mW 8% at DC, 1310 nm  
n AC conversion gain  
P6701B: 1 V/mW 8%, with 100 WP-P optical modulation,  
780 nm  
P6703B: 1 V/mW 8%, with 100 WP-P optical modulation,  
1310 nm  
n Output zero  
1 mV into 50 , 20 to 25_ C  
n Noise equivalent power  
(with 1 GHz low-pass filter)  
P6701B: 0.87 WRMS  
(28 pWHz )  
P6703B: 0.59 WRMS  
(19 pWHz )  
Output impedance  
Temperature  
50 10%  
Operating: 0 to +50_ C  
Nonoperating: -40 to +71_ C  
1
P6701B, P6703B, and P6723 Service Manual  
 
P6701B and P6703B Specifications  
Table 1: P6701B and P6703B warranted electrical characteristics (cont.)  
Humidity  
Operating: 0-90% RH, tested at  
+ 30 to + 50_ C  
Nonoperating: 0-90% RH, tested at  
+ 30 to + 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  
Optical bandwidth  
See Figure 1  
P6701B: 1.0 GHz  
P6703B: 1.2 GHz  
Rise time  
P6701B: 475 ps  
P6703B: 390 ps  
(peak optical signal input < 100 WP-P  
)
Aberrations  
15% peak optical signal input < 200 WP-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  
0.5  
0.4  
0.3  
0.2  
Normalized to  
780nm at 1 V/mW  
~ 0.8 at 850nm  
400  
500  
600 700  
Wavelength (nm)  
800  
900  
1000  
P6703B  
1.2  
1.1  
1.0  
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
~ 1.1 at 1550 nm  
Normalized to 1310nm at 1 V/mW  
1000  
1200  
1400  
Wavelength (nm)  
1600  
Figure 1: Typical wavelength dependent gain (25_ C ambient)  
3
P6701B, P6703B, and P6723 Service Manual  
 
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  
Optical fiber dressing  
Accepts up to 62.5 m core diameter, Numerical Aperture 0.29  
> 1 inch bend radius, not to exceed a bend radius of < 1 inch to  
maintain performance.  
Absolute non-destructive fiber bend  
DC conversion gain linearity  
0.5 inch bend radius  
< 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 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 power1  
Output rise time and fall time  
455 ps  
n Output amplitude  
Minimum: 690 mVP-P  
Maximum: 1.1 VP-P  
Output impedance  
Output VSWR  
50 10%  
< 1.5:1 from 10 MHz to 1 GHz  
< 2.0:1 from 1 GHz to 2 GHz  
Temperature  
Humidity  
Operating: 0 to +50_ C  
Nonoperating: -40 to +71_ C  
Operating: 0-90% RH, tested at  
+ 30 to + 50_ C  
Nonoperating: 0-90% RH, tested at  
+ 30 to + 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.  
5
P6701B, P6703B, and P6723 Service Manual  
 
P6723 Specifications  
Typical Characteristics  
Typical characteristics (Table 5) describe typical but not guaranteed performance.  
Table 5: P6723 typical electrical characteristics  
Effective wavelength range  
Aberrations  
1100 to 1570 nm  
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  
Optical data rate  
Accepts up to 62.5 m core diameter, Numerical Aperture 0.29  
20 MB/s minimum1  
650 Mb/s maximum1  
Optical fiber dressing  
> 1.5-inch bend radius  
0.5-inch bend radius  
Absolute non-destructive fiber bend  
Output load requirement  
50 1%, AC or DC coupled  
1
Measured with an optical input using 223 - 1 pseudorandom word having a 50% duty cycle.  
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
H
H
H
Noise equivalent power  
Output zero  
DC conversion gain  
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  
Accuracy > 2.5%, resolution >  
5 pW, Max power > 1 mW, cali-  
brated from 700 nm - 1600 nm  
HP 8153A with power  
sensor HP 81532A and  
HP 81531A  
P6701B only: 780 nm cal  
source  
output > 200uW (CW)1,  
stability > 0.1 dB over 5 minutes,  
modulated square wave @ 10 kHz  
with off modulation at zero-light  
level  
P6701B only: 850 nm cal  
source  
output > 200uW1,  
stability > 0.1 dB over 5 minutes,  
modulated square wave @ 10 kHz  
with off modulation at zero-light  
level  
7
P6701B, P6703B, and P6723 Service Manual  
 
P6701B and P6703B Performance Verification  
Table 7: Test equipment (cont.)  
Description  
P6703B only: 1310 nm cal output > 200uW1,  
source stability > 0.1 dB over 5 minutes,  
Minimum requirements  
Example product  
modulated square wave @ 10 kHz  
with off modulation at zero-light  
level  
P6703B only: 1550 nm cal output > 200uW (CW)1,  
source  
stability > 0.1 dB over 5 minutes,  
modulated square wave @ 10 kHz  
with off modulation at zero-light  
level  
RF power meter  
noise < .1 mV, BW > 4 GHz  
HP 437B with power sensor  
HP 8481D  
P6703B only: 1300 nm  
impulse generator  
OIG 502  
P6701B only: 850 nm  
impulse generator  
OIG 501  
Sampling oscilloscope  
11K (1140X, CSA40xX, or  
DSA60X)  
Adjustable optical  
attenuator  
4 decades, 50um core fiber, FC-  
style connectors  
JDS 5000L with 62 m  
fiber with FC connectors  
Digital voltmeter  
50 ohm termination  
Optical cable  
4 1/2 digit  
1%  
Tektronix DMM916  
011-0049-01  
FC-FC multimode, 62.5um, 2  
meters  
174-2322-00  
Inline optical adapter  
FC female to FC female  
131-5039-00  
TekProbe Power Supply  
Tektronix 1103  
Low-pass filter  
1 GHz  
Mini Circuits SLP 1000  
1
CW and modulated mode available: modulation with OFF level at or below 0.1uW,  
optical falltime < 1us  
Noise Equivalent Power  
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.  
8
P6701B, P6703B, and P6723 Service Manual  
 
P6701B and P6703B Performance Verification  
Output Zero  
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 1 mV.  
DC Conversion Gain  
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 perform-  
ing 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 fibers 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.)  
9
P6701B, P6703B, and P6723 Service Manual  
 
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 fibers 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 wave-  
length setting is at 1310 nm.  
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.)  
AC Conversion Gain  
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.  
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-to-  
peak signal from the P670XB is about 200 mV (or 200 W if the vertical  
units displayed are “W”).  
10  
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).  
11  
P6701B, P6703B, and P6723 Service Manual  
 
P6701B and P6703B Performance Verification  
Test record  
Probe Model/Serial Number:  
Temperature:  
Certificate Number:  
RH %:  
Date of Calibration:  
Technician:  
Performance test  
Minimum  
Incoming  
Outgoing  
Maximum  
N/A  
15 nW (P6701B)  
7 nW (P6703B)  
Noise Equivalent Power  
Output zero  
N/A  
1 mV  
DC conversion gain  
AC conversion gain  
92 mV  
- 1 6 m V  
108 mV  
16 mV  
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, cali-  
brated from 700 nm - 1600 nm  
HP 8153A with power  
sensor HP 81530A and  
HP 81531A  
1310 nm digital optical  
signal source  
52 MHz - 622 MHz  
Tektronix CTS710/CTS750  
Sampling oscilloscope  
oscilloscope with Tekprobe II  
interface  
Tektronix TDS784x  
Adjustable optical  
attenuator  
4 decades, 50 m core fiber,  
FC-style connectors  
JDS 5000L with 62 m  
fiber with FC connectors  
Optical cable  
FC-FC multimode, 62.5 m, 2  
meters  
174-2322-00  
13  
P6701B, P6703B, and P6723 Service Manual  
 
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 perform-  
ing 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:  
Temperature:  
Certificate Number:  
RH %:  
Date of Calibration:  
Technician:  
Performance test  
Minimum  
Incoming  
Outgoing  
Maximum  
0.69 V  
1.1 V  
Output Amplitude  
15  
P6701B, P6703B, and P6723 Service Manual  
 
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  
Use the following items to clean the fiber-optic connectors:  
H
H
H
clean compressed air  
fiber-optic cleaning swabs  
isopropyl alcohol  
Procedure  
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.  
17  
P6701B, P6703B, and P6723 Service Manual  
 
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  
 
Maintenance  
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  
and high insertion loss.  
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.  
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  
19  
P6701B, P6703B, and P6723 Service Manual  
 
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.  
21  
P6701B, P6703B, and P6723 Service Manual  
 
Options  
22  
P6701B, P6703B, and P6723 Service Manual  
 
Replaceable Parts  
NOTE: Parts illustrated  
with dashed lines are not  
replaceable  
3
2
1
2
Figure 5: Replaceable parts  
2
3
1
Figure 6: Standard accessories  
1
2
3
4
7
8
9
6
5
Figure 7: Optional accessories  
23  
P6701B, P6703B, and P6723 Service Manual  
 
Replaceable Parts  
Replaceable parts list  
Fig. &  
Tektronix  
Serial no. Serial no.  
index  
number  
part number effective  
discont’d  
Qty Name & description  
Mfr. code  
18359  
Mfr. part number  
P-6158-1  
5-1  
-2  
131-3627-01  
131-6353-00  
205-0191-00  
1
1
1
CONTACT,ELEC:GOLD PLATED TIP  
CONTACT,ELEC:GOLD PLATED TIP  
SHELL,ELEC CONN:BNC,ABS,DOVE GRAY  
Standard accessories  
18359  
P-6158-2  
-3  
80009  
205-0191-00  
6-1  
-2  
131-6252-00  
131-6250-00  
131-6251-00  
1
1
1
CONN:FC TO FC SQUARE MOUNT  
ADAPTER,W/ZIRCONIA CERAMIC SLEEVE  
0C5R7  
0C5R7  
0C5R7  
CO92290  
C032980  
C002453  
CONN:FC TO ST ADAPTER W/ZIRCONIA CERAMIC  
SLEEVE  
-3  
CONN:SC TO FC SQUARE FLANGE ADAPTER  
W/ZIRCONIA CERAMIC SLEEVE  
070-9890-XX  
070-9892-XX  
1
1
MANUAL,TECH:INSTRUCTIONS,4 LANGUAGES  
MANUAL, TECH:SERVICE,ENGLISH  
80009  
80009  
070-9890-XX  
070-9892-XX  
Optional accessories  
7-1  
174-1497-00  
174-1385-00  
1
1
CA ASSY,FBR OPT:SINGLE MODE,2M L  
FC/PC TO DIAMOND 2.5  
80009  
80009  
174-1497-00  
174-1385-00  
CA ASSY,FBR OPT:SGL MODE,2M L,FC/PC  
DIAMOND3.5  
174-1386-00  
174-1387-00  
174-1388-00  
1
1
1
CA ASSY,FBR OPT:SINGLE MODE,2M L,FC/PC-ST  
CA ASSY,FBR OPT:SGL MODE,2M L,FC/PC-FC/PC  
80009  
80009  
80009  
174-1386-00  
174-1387-00  
174-1388-00  
CA ASSY,FBR OPT:SGL MODE,2M  
L,FC/PC-BICONIC  
174-2322-00  
174-2323-00  
174-2324-00  
174-3737-00  
1
1
1
1
CABLE,FIBER OPT:JUMPER,2 METER,62.5  
MICRON,FC/PC TO FC/PC  
62712  
62712  
62712  
0C5R7  
174-2322-00  
174-2322-00  
PC/SK-20-002A  
CABLE,FIBER OPT:JUMPER,2 METER,62.5  
MICRON,FC/PC TO BICONIC  
CABLE,FIBER OPT:JUMPER,2 METER,62.5  
MICRON,FC/PC TO SMA 906  
-2  
FIBER OPTIC:COUPLER, 1 X 2 SPLITTER,  
WAVELENGTH INDEPENDENT, 90/10 RATIO, ATT.  
0.1 DB, REFLE  
3-0102-10-B-UFC-0  
1-UFC-01  
-3  
-4  
011-0049-01  
012-0482-00  
1
1
TERMN,COAXIAL:50 OHM,2W,BNC  
24931  
28A123-1  
CA ASSY,RF:COAXIAL,RFD,50  
OHM,(175-1455-00),36 L,BNC,MALE,STR,BOTH  
ENDS,W/STRAIN RELIEF BO  
TK2469  
012-0482-00  
-5  
-6  
015-0554-00  
119-5118-00  
1
1
ADPTR,SMA,ELEC:FEMALE BNC TO MALE SMA  
24931  
29JP170-1  
ATTEN,OPTICAL:30MM,L10DBFOR 1310/1550NM,FC 0LK97  
CONN.FA100-35-10-HP,CTS710  
FA100-35-10-HP  
-7  
020-2209-00  
1
ACCESSORY KIT:CONNECTOR,OPTICAL,DIN TO FC 80009  
SQUARE MOUNT ADAPTER,  
020-2209-00  
-8  
-9  
- - - - - - - - - -  
- - - - - - - - - -  
1
1
1103 TekProbe Power Supply  
80009  
80009  
Order by Description  
Order by Description  
FS156 or FS622 SDH/SONET filters  
24  
P6701B, P6703B, and P6723 Service Manual  
 
Replaceable Parts  
Manufacturers cross index  
Mfr.  
code  
Manufacturer  
Address  
City, state, zip code  
0C5R7  
0LK97  
18359  
24931  
ALCOA FUJIKURA LTD  
JDS FITEL INC  
150 RIDGEVIEW CIRCLE  
570 WEST HUNT CLUB RD  
51 NEWCOMB ST  
DUNCAN, SC 29334  
NEPEAN, ONTARIO CA ONTARIO K2G 5W8  
ATTLEBORO, MA 02703-1403  
FRANKLIN, IN 46131  
PYLON CO. INC.  
BERG ELECTRONICS INC  
BERG ELECTRONICS RF/COAXIAL DIV  
2100 EARLYWOOD DR  
PO BOX 547  
62712  
80009  
TK2469  
SEIKO INSTRUMENTS USA INC  
TEKTRONIX INC  
ELECTRONIC COMPONENTS DIV  
2990 W LOMITA BLVD  
TORRANCE, CA 90505  
14150 SW KARL BRAUN DR  
PO BOX 500  
BEAVERTON, OR 97077-0001  
VANCOUVER, WA 98661  
UNITREK CORPORATION  
3000 LEWIS & CLARK HWY  
SUITE 2  
25  
P6701B, P6703B, and P6723 Service Manual  
 
Replaceable Parts  
26  
P6701B, P6703B, and P6723 Service Manual  
 
 
 

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