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.
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. 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.
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.
Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii v Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v v P6701B and P6703B Specifications . . . . . . . . . .
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. To Avoid Fire or Personal Injury Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markings on the product.
General Safety Summary Symbols on the Product.
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 Instructions (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 www.tektronix.
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.
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.
P6701B and P6703B Specifications P6701B 1.2 Normalized to 780nm at 1 V/mW Relative Conversion Gain 1.1 1.0 0.9 0.8 0.7 ~ 0.8 at 850nm 0.6 0.5 0.4 0.3 0.2 400 500 600 700 Wavelength (nm) 800 900 1000 P6703B 1.2 Relative Conversion Gain 1.1 1.0 ~ 1.1 at 1550 nm 0.9 0.8 Normalized to 1310nm at 1 V/mW 0.7 0.6 0.5 0.4 0.3 0.
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.
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.
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.
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.
P6701B and P6703B Performance Verification Table 7: Test equipment (cont.) Description Minimum 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 output > 200uW (CW)1, stability > 0.1 dB over 5 minutes, modulated square wave @ 10 kHz with off modulation at zero-light level RF power meter noise < .
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 performing this step.
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.
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 and P6703B Performance Verification Test record Probe Model/Serial Number: Temperature: Date of Calibration: Certificate Number: RH %: Technician: Performance test Minimum Noise Equivalent Power N/A 15 nW (P6701B) 7 nW (P6703B) Output zero N/A 1 mV DC conversion gain 92 mV 108 mV AC conversion gain - 16 mV 16 mV 12 Incoming Outgoing Maximum 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.
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.
P6723 Performance Verification Test record Probe Model/Serial Number: Temperature: Date of Calibration: Certificate Number: RH %: Technician: Performance test Minimum Output Amplitude 0.69 V P6701B, P6703B, and P6723 Service Manual Incoming Outgoing Maximum 1.
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.
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.
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.
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.
Options Option 95 documents the measurements taken during calibration. Option FR documents the frequency response of the O/E converter.
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 1 3 Figure 6: Standard accessories 1 5 2 6 7 3 8 4 9 Figure 7: Optional accessories P6701B, P6703B, and P6723 Service Manual 23
Replaceable Parts Replaceable parts list Fig. & index number Tektronix part number Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr.
Replaceable Parts Manufacturers cross index Mfr. code Manufacturer Address City, state, zip 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.
Replaceable Parts 26 P6701B, P6703B, and P6723 Service Manual
