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User Manual
1502C
Metallic Time-Domain Reflectometer
070-7169-05
This document applies for firmware version 5.04
and above.
www.tektronix.com
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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.
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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
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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.com Sales support 1-800-833-9200, select option 1* Service support 1-800-833-9200, select option 2* Technical support Email: techsupport@tektronix.com 1-800-833-9200, select option 3* 1-503-627-2400 6:00 a.m. – 5:00 p.m. Pacific time * This phone number is toll free in North America. After office hours, please leave
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Table of Contents General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Installation and Repacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Overview . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents Appendix D: Application Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–1 Pulse Echo Testing of Electrical Transmission Lines Using the Tektronix Time-Domain Reflectometry Slide Rule . . . . . . . . . . . D–1 Terms and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–1 Relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2 VSWR vs. Per
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Table of Contents List of Figures Figure 1–1: Rear Panel Voltage Selector, Fuse, AC Receptacle . . . . . 1–2 Figure 1–2: Display Showing Low Battery Indication . . . . . . . . . . . . . 1–3 Figure 1–3: 1502C Front-Panel Controls . . . . . . . . . . . . . . . . . . . . . . . 1–5 Figure 1–4: Display and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6 Figure 1–5: Vp Set at .30, Cursor Beyond Reflected Pulse (Set Too Low) . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents Figure 1–32: Waveform Display with No Outgoing Pulses . . . . . . . . . 1–30 Figure 1–33: A Captured Single Sweep . . . . . . . . . . . . . . . . . . . . . . . . . 1–32 Figure 2–1: Display Showing 3-ft Cable in Start-Up Conditions . . . . 2–3 Figure 2–2: Cursor of Rising Edge of Reflected Pulse . . . . . . . . . . . . . 2–3 Figure 2–3: Waveform with VERT SCALE Increased Showing an Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents Figure 2–33: Captured Single Sweep of Shorted Test Cable . . . . . . . . 2–25 Figure B–1: Start-up Measurement Display . . . . . . . . . . . . . . . . . . . . . B–2 Figure B–2: Measurement Display with 3-foot Cable . . . . . . . . . . . . . B–3 Figure B–3: Cursor at End of 3-foot Cable . . . . . . . . . . . . . . . . . . . . . . B–3 Figure B–4: Cursor at End of 3-foot Cable, Vp Set to .30 . . . . . . . . . . B–4 Figure B–5: Flat-Line Display Out to 50,0000+ Feet . . . . . . . .
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Table of Contents List of Tables Table i: Shipping Carton Test Strength . . . . . . . . . . . . . . . . . . . . . . . . ix Table 1–1: Fuse and Voltage Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 Table 1–2: Vp of Various Dielectric Types . . . . . . . . . . . . . . . . . . . . . . 1–12 Table A–1: Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . A–1 Table A–2: Environmental Characteristics . . . . . . . . . . . . . . . . . . . . . A–3 Table A–3: Ph
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General Information Product Description The Tektronix 1502C Metallic Time-Domain Reflectometer (MTDR) is a short-range cable tester capable of finding faults in metal cable. Tests can be made on coaxial, twisted pair, or parallel cable. The 1502C sends an electrical pulse down the cable and detects any reflections made by discontinuities. This is known as time-domain reflectometry. The 1502C is sensitive to impedance changes. Problems in the cable will be detected and displayed as changes in imp
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General Information Installation and Repacking Unpacking and Initial Before unpacking the 1502C from its shipping container or carton, inspect for signs of external damage. If the carton is damaged, notify the carrier. The Inspection shipping carton contains the basic instrument and its standard accessories. Refer to the replaceable parts list in the Service Manual for a complete listing. If the contents of the shipping container are incomplete, if there is mechanical damage or defect, or if the
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General Information Table i: Shipping Carton Test Strength Gross Weight (lb) Carton Test Strength (lb) 0 – 10 200 11 – 30 275 31 – 120 375 121 – 140 500 141 – 160 600 2. Install the front cover on the 1502C and surround the instrument with polyethylene sheeting to protect the finish. 3. Cushion the instrument on all sides with packing material or urethane foam between the carton and the sides of the instrument. 4. Seal with shipping tape or an industrial stapler. If you have any questions, cont
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General Information x 1502C MTDR User Manual
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General Safety Summary The safety information in this summary is for operating personnel. Specific warnings and cautions will be found throughout the manual where they apply, but might not appear in this summary. For specific service safety information, see the 1502C Service Manual. Safety Terms and Symbols Terms 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 th
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General Safety Summary Power Source This product is intended to operate from a power source that will not apply more than 250 volts RMS between the supply conductors or between the supply conductor and ground. A protective ground connection, by way of the grounding conductor in the power cord, is essential for safe operation. Grounding the Product This product is grounded through the grounding conductor of the power cord. To avoid electrical shock, plug the power cord into a properly wired recep
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General Safety Summary Tektronix Factory Service will accept 1502C batteries for recycling. If you choose to return the battery to us for recycling, the battery cases must be intact, the battery should be packed with the battery terminals insulated against possible short-circuits, and should be packed in shock-absorbant material. Tektronix, Inc. Attn: Service Department P.O. Box 500 Beaverton, Oregon 97077 U.S.A. For additional information, phone:1–800–TEK–WIDE xiii 1502C MTDR User Manual
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General Safety Summary xiv 1502C MTDR User Manual
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Operating Instructions Overview Handling The 1502C front panel is protected by a watertight cover, in which the standard accessories are stored. Secure the front cover by snapping the side latches outward. If the instrument is inadvertently left on, installing the front cover will turn off the POWER switch automatically. The carrying handle rotates 325° and serves as a stand when positioned beneath the instrument. Inside the case, at the back of the instrument, is a moisture-absorbing canister c
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Operating Instructions REMOVE REMOVE CAP TO CAP TO SELECT REPLACE VOLTAGE FUSE Voltage Selector Line Fuse AC Power Cord Receptacle Figure 1–1: Rear Panel Voltage Selector, Fuse, AC Receptacle Table 1–1: Fuse and Voltage Ratings Fuse Rating Voltage Rating 250 V Nominal Range 0.3 AT 115 VAC (90 – 132 VAC) 0.15 AT 230 VAC (180 – 250 VAC) Care of the Battery Pack CAUTION. Read these instructions concerning the care of the battery pack. They contain instructions that reflect on your safety and the p
