Tektronix 1503C User manual

User Manual
1503C
Metallic Time-Domain Reflectometer
070-7323-05
This document applies to firmware version 5.04
and above.
www.tektronix.com

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.
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.

1503C MTDR User Manual i
Table of Contents
List of Figures iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Repacking viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Safety Summary xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Instructions 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing to Use the 1503C 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front-Panel Controls 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu Selections 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Preparations 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Test Procedure 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Features (Menu Selected) 1–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operator Tutorial 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What is the Tektronix 1503C? 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does It Do It? 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
You, the Operator 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menus and Help 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Waveform Up Close 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Longer Cable 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noise 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Ref (∆Mode) 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIEW INPUT 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STORE and VIEW STORE 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIEW DIFF 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii 1503C MTDR User Manual
Menu-Accessed Functions 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDR Questions and Answers 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options and Accessories 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 04: YT–1 Chart Recorder 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 05: Metric Default 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 06: Ethernet) 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 07: YT–1S Chart Recorder 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 08: Token Ring Adapter 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 09: Universal Service Ordering Code 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 10: Token Ring Interface 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cord Options 3–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 3–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A: Specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental Characteristics A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certifications and Compliances A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Characteristics A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Operator Performance Checks B–1. . . . . . . . . . . . . .
Appendix C: Operator Troubleshooting C–1. . . . . . . . . . . . . . . . . .
Error Messages C–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix D: Application Note D–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary Glossary–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
1503C MTDR User Manual iii
List of Figures
Figure 1–1: Rear Panel Voltage Selector, Fuse, AC Receptacle 1–1. . . . . . . .
Figure 1–2: Display Showing Low Battery Indication 1–3. . . . . . . . . . . . . . .
Figure 1–3: 1503C Front-Panel Controls 1–4. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–4: Display and Indicators 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–5: Vp Set at .30, Cursor Beyond Reflected Pulse
(Setting Too Low) 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–6: Vp Set at .99, Cursor Less Than Reflected Pulse
(Setting Too High) 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–7: Vp Set at .66, Cursor on Rising Edge of Reflected
Pulse (Set Correctly) 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–8: 20-ft Cable at 5 ft/div 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–9: Short in the Cable 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–10: Open in the Cable 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–11: 455-ft Cable 1–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–12: 455-ft Cable with 20 ft/div, Cursor Off Screen 1–15. . . . . . . . . .
Figure 1–13: Return Loss 1–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–14: Reflection Adjusted to One Division in Height 1–16. . . . . . . . . .
Figure 1–15: Display with VIEW INPUT Turned Off 1–17. . . . . . . . . . . . . . .
Figure 1–16: Display of a Stored Waveform 1–18. . . . . . . . . . . . . . . . . . . . . . .
Figure 1–17: Display of a Stored Waveform and Current Waveform 1–18. . . .
Figure 1–18: Display of a Stored Waveform, Current Waveform,
and Difference Waveform 1–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–19: Waveform Moved to Top Half of Display 1–19. . . . . . . . . . . . . .
Figure 1–20: Current Waveform Centered, Stored
Waveform Above 1–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–21: Current Waveform Center, Stored Waveform
Above, Difference Below 1–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–22: Waveform of Three-Foot Lead-in Cable 1–21. . . . . . . . . . . . . . .
Figure 1–23: Cursor Moved to End of Three-Foot Lead-in Cable 1–22. . . . . .
Figure 1–24: Cursor Moved to End of Three-Foot Lead-in Cable 1–22. . . . . .
Figure 1–25: Cursor Moved to 0.00 ft 1–23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–26: Incident Pulse at Four Divisions, FILTER at
Desired Setting 1–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–27: Waveform Viewed in Normal Operation 1–24. . . . . . . . . . . . . . .
Figure 1–28: Waveform Showing Intermittent Short 1–25. . . . . . . . . . . . . . . .
Figure 1–29: Waveform Display with No Outgoing Pulses 1–25. . . . . . . . . . .

Table of Contents
iv 1503C MTDR User Manual
Figure 1–30: A Captured Single Sweep 1–26. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1: Display Showing 10-ft Cable in Start-Up Conditions 2–2. . . . . .
Figure 2–2: Cursor of Rising Edge of Reflected Pulse 2–3. . . . . . . . . . . . . . .
Figure 2–3: Waveform with VERT SCALE Increased Showing
an Open 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4: Waveform with Short 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: 10-foot Cable with Cursor at Far Left 2–4. . . . . . . . . . . . . . . . . .
Figure 2–6: 10-foot Cable with Cursor at Incident Pulse 2–5. . . . . . . . . . . . .
Figure 2–7: 10-foot Cable with Cursor at Incident Pulse, Vertical
Scale at 25 dB 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–8: Cursor on End of Longer Cable 2–6. . . . . . . . . . . . . . . . . . . . . . .
Figure 2–9: Scrolling Down the Cable 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–10: Pulse Width at 2 ns 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–11: Pulse Width at 10 ns 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–12: Pulse Width at 100 ns 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–13: Pulse Width at 1000 ns, Longer than the Cable
Being Tested 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–14: Noise on the Waveform. 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–15: Noise Reduced. 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–16: Noise Reduced to Minimum 2–10. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–17: Incident and Reflected Pulses with Cursor at 0.00 ft 2–11. . . . . .
Figure 2–18: Incident and Reflected Pulses with Cursor at 10.0 ft 2–12. . . . . .
Figure 2–19: New Zero Set at End of Test Cable 2–12. . . . . . . . . . . . . . . . . . .
Figure 2–20: Display with 10-ft Cable and NOISE FILTER turned to
VERT SET REF 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–21: VERT SCALE adjusted to Make Pulse Two Divisions
High 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–22: Filter Returned to Desired Setting 2–14. . . . . . . . . . . . . . . . . . . .
Figure 2–23: Display with VIEW INPUT Turned Off 2–15. . . . . . . . . . . . . . .
Figure 2–24: Display with VIEW INPUT Turned On 2–15. . . . . . . . . . . . . . .
Figure 2–25: Waveform Moved to Upper Portion of the Display 2–16. . . . . . .
Figure 2–26: Waveform with Cable Shorted 2–16. . . . . . . . . . . . . . . . . . . . . . .
Figure 2–27: Waveform with Both Current and Stored Waveforms 2–17. . . . .
Figure 2–28: Stored, Current, and Difference Waveforms 2–17. . . . . . . . . . . .
Figure 2–29: Display with VIEW STORE and VIEW DIFF Disabled. 2–19. .
Figure 2–30: Short and Open Viewed via Max Hold 2–19. . . . . . . . . . . . . . . .
Figure 2–31: Waveform Strobed Down Display in Max Hold 2–19. . . . . . . . .
Figure 2–32: Display with Pulse Turned Off 2–21. . . . . . . . . . . . . . . . . . . . . .

Table of Contents
1503C MTDR User Manual v
Figure 2–33: Test Cable 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–34: Shorted Test Cable with a Captured Single Sweep 2–22. . . . . . .
Figure 3–1: A Typical Ethernet System 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–2: N-Type Male T-Connector 3–5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–3: N-Type Female T-Connector 3–6. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–4: System 1 – Tap Hidden by Traffic
(1 avg, 50 ft/div. 35 dB) 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–5: System 1 – Traffic and Tap Nearly Identical
(4 avg, 50 ft/div, 35 dB) 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–6: System 1 – Tap Becoming Visible
(16 avg, 50 ft/div, 35 dB) 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–7: System 1 – Tap Quite Visible
(128 avg, 50 ft/div, 35 dB) 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–8: System 1 – No Traffic
(1 avg, 50 ft/div, 35 dB) 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–9: System 1 – Tap Expanded, No Traffic
(1 avg, 2 ft/div, 35 dB) 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–10: System 2 – Cable w/ Revision One Repeater
(1 avg, 200ft/div, 2.25dB) 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–11: System 2 – First Tap, No Traffic
(1 avg, 1 ft/div, 44.5 dB) 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–12: System 2 – Same Tap with 5% Traffic
(1 avg, 1 ft/div, 44.5 dB) 3–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–13: System 2 – Same Tap, Increased Averaging
(16 avg, 1 ft/div, 44.5 dB) 3–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–14: System 2 – Farther Out, More Gain
(128 avg, 10 ft/div, 53.5 dB) 3–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–15: System 2 – 1000-ft Cable at 10 ns
(128 avg, 100 ft/div, 43.75 dB) 3–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–16: System 2 – Previous Waveform Expanded
(128 avg, 20 ft/div, 54.75 dB) 3–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–17: System 2 – Next Group of Taps
(128 avg, 20 ft/div, 54.75 dB) 3–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–18: System 2 – Group of Taps Expanded
(128 avg, 10 ft/div, 54.75 dB) 3–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–19: System 2 – Another Group of Taps
(128 avg, 10 ft/div, 54.75 dB) 3–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–20: System 2 – End of Cable (128 avg, 20 ft/div, 61.25 dB) 3–16. . .
Figure 3–21: Typical Frequency Response Curve with Ethernet
Option 06 3–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
vi 1503C MTDR User Manual
Figure B–1: Start-up Measurement Display B–2. . . . . . . . . . . . . . . . . . . . . . .
Figure B–2: Measurement Display with 10-foot Cable B–2. . . . . . . . . . . . . .
Figure B–3: Cursor at End of 10-foot Cable B–3. . . . . . . . . . . . . . . . . . . . . . .
Figure B–4: Cursor at End of 10-foot Cable, Vp Set to .30 B–3. . . . . . . . . . .
Figure B–5: Flatline Display Out to 50,0000+ Feet B–4. . . . . . . . . . . . . . . . .
Figure B–6: Waveform Off the Top of the Display B–4. . . . . . . . . . . . . . . . . .
Figure B–7: Waveform at the Bottom of the Display B–4. . . . . . . . . . . . . . . .
Figure B–8: Waveform with Gain at 57 dB B–5. . . . . . . . . . . . . . . . . . . . . . . .
Figure B–9: Distance at –2.00 ft B–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–10: Pulse Adjusted to Four Major Divisions in Height B–7. . . . . . .
Figure B–11: Waveform Centered, Cursor at 10.00 ft B–8. . . . . . . . . . . . . . .
Figure B–12: Pulse Adjusted to Four Major Divisions in Height B–8. . . . . . .
Figure B–13: Aberrations Less Than Four Divisions Out to 30.00 ft B–9. . . .
Figure B–14: Pulse Adjusted to Four Major Divisions in Height B–9. . . . . . .
Figure B–15: Aberrations Less Than Four Divisions Out to 300.00 ft B–10. . .
Figure B–16: Pulse Adjusted to Four Major Divisions in Height B–10. . . . . . .
Figure B–17: Aberrations Less Than Four Divisions Out to
3000.00 ft B–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Tables
Shipping Carton Test Strength ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse and Voltage Ratings 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vp of Various Dielectric Types 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impedance of Various Cable Types 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suggested Pulse and Ft/Div for Cable Lengths 1–13. . . . . . . . . . . . . . . . . . . . . . . . . .
Option 06 Electrical Characteristics 3–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental Characteristics A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certifications and Compliances A–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Characteristics A–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1503C MTDR User Manual vii
General Information
The Tektronix 1503C Metallic-cable Time-Domain Reflectometer (MTDR) is a
cable test instrument that uses radar principles to determine the electrical
characteristics of metallic cables.
The 1503C generates a half-sine wave signal, applies it to the cable under test, and
detects and processes the reflected voltage waveform. These reflections are
displayed in the 1503C liquid crystal display (LCD), where distance measurements
may be made using a cursor technique. Impedance information may be obtained
through interpreting waveform amplitude.
The waveform may be temporarily stored within the 1503C and recalled or may be
printed using the optional dot matrix strip chart recorder, which installs into the
front-panel Option Port.
The 1503C may be operated from an AC power source or an internal lead-acid
battery that supply a minimum of five hours operating time (see the Specifications
appendix for specifics).
Options available for the 1503C are explained in the Options and Accessories
chapter of this manual.
Terminology used in this manual is in accordance with industry practice.
Abbreviations are in accordance with ANSI Y1.1–19722, with exceptions and
additionsexplainedinparenthesesinthetext.GraphicsymbologyisbasedonANSI
Y32.2–1975.LogicsymbologyisbasedonANSIY32.14–1973andmanufacturer’s
data books or sheets. A copy of ANSI standards may be obtained from the Institute
of Electrical and Electronic Engineers, 345 47th Street, New York, NY 10017.
Changesthatinvolvemanualcorrections and/oradditionaldatawill beincorporated
into the text and that page will show a revision date on the inside bottom edge.
History information is included in any diagrams in gray.
Product Description
Battery Pack
Options
Standards, Documents,
and References Used
Changes and History
Information

General Information
viii 1503C MTDR User Manual
Installation and Repacking
Before unpacking the 1503C from its shipping container or carton, inspect for signs
of external damage. If the carton is damaged, notify the carrier. The 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
damageordefect,oriftheinstrumentdoesnotmeetoperationalcheckrequirements,
contactyourlocalTektronixField Officeorrepresentative. If the shippingcontainer
is damaged, notify the carrier as well as Tektronix.
The instrument was inspected both mechanically and electrically before shipment.
It should be free if mechanical damage and meet or exceed all electrical
specifications.Procedurestocheckoperational performance are in the Performance
Checks appendix. These checks should satisfy the requirements for most receiving
or incoming inspections.
The 1503C is intended to be operated from a power source that will not apply more
than 250 volts RMS between the supply conductors or between either supply
conductor and ground. A protective ground connection, by way of the grounding
conductor in the power cord, is essential for safe operation.
The AC power connector is a three-way polarized plug with the ground (earth) lead
connected directly to the instrument frame to provide electrical shock protection. If
the unit is connected to any other power source, the unit frame must be connected
to earth ground.
Power and voltage requirements are printed on the back panel. The 1503C can be
operated from either 115 VAC or 230 VAC nominal line voltage at 45 Hz to 440 Hz,
or a battery pack.
Further information on the 1503C power requirements can be found in the Safety
Summary in this section and in the Operating Instructions chapter.
Unpacking and InItial
Inspection
Power Source and Power
Requirements

General Information
1503C MTDR User Manual ix
When the 1503C is to be shipped to a Tektronix Service Center for service or repair,
attach a tag showing the name and address of the owner, name of the individual at
your firm who may be contacted, the complete serial number of the instrument, and
a description of the service required. If the original packaging is unfit for use or is
not available, repackage the instrument as follows:
1. Obtain a carton of corrugated cardboard having inside dimensions that are at
least six inches greater than the equipment dimensions to allow for cushioning.
The test strength of the shipping carton should be 275 pounds (102.5 kg). Refer
to the following table for test strength requirements:
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 1503C 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, contact your local Tektronix Field Office or
representative.
Repacking for Shipment

General Information
x1503C MTDR User Manual
Contacting Tektronix
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*
Servicesupport 1-800-833-9200, selectoption 2*
Technicalsupport Email:[email protected]
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 a
voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.

1503C MTDR User Manual xi
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.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Use Proper Voltage Setting. Before applying power, ensure that the line selector is
in the proper position for the power source being used.
Thisproductisintendedtooperatefromapowersourcethatwillnotapplymorethan
250voltsRMSbetweenthe supply conductors or between the supply conductorand
ground. A protective ground connection, by way of the grounding conductor in the
power cord, is essential for safe operation.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
The standard power cord (161-0288-00) is rated for outdoor use. All other optional
power cords are rated for indoor use only.
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 apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Replace Batteries Properly. Replace batteries only with the proper type and rating
specified.
Recharge Batteries Properly. Recharge batteries for the recommended charge
cycle only.
Use Proper AC Adapter. Use only the AC adapter specified for this product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
To Avoid Fire or
Personal Injury
Power Source

General Safety Summary
xii 1503C MTDR User Manual
Do Not Operate With SuspectedFailures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in an Explosive Atmosphere.
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
CAUTION
Refer to Manual WARNING High Voltage Double
Insulated ProtectiveGround
(Earth) Terminal
This product contains a Nickel Cadmium (NiCd) battery, which must be recycled
or disposed of properly. For the location of a local battery recycler in the U.S. or
Canada, please contact:
RBRC (800) BATTERY
Rechargeable Battery Recycling Corp. [phone]
P.O. Box 141870 www.rbrc.com
Gainesville, Florida 32614
Symbols and Terms
Battery Recycling

1503C MTDR User Manual 1–1
Operating Instructions
Overview
The 1503C 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.
The 1503C can be stored in temperatures ranging from –62°C to +85°C if a battery
is not installed. If a battery is installed and the storage temperature is below –35°
C or above +65°C, the battery pack should be removed and stored separately (see
1503C Service Manual for instructions on removing the battery). Battery storage
temperature should be between –35°C to +65°C.
In the field, the 1503C can be powered using the internal battery. For AC operation,
check the rear panel for proper voltage setting. The voltage selector can be seen
through the window of the protective cap. If the setting differs from the voltage
available, it can be easily changed. Simply remove the protective cap and select the
proper voltage using a screwdriver.
REMOVE
CAP TO
REPLACE
FUSE
REMOVE
CAP TO
SELECT
VOLTAGE
Voltage
Selector
Line Fuse
AC Power
Cord Receptacle
Figure 1–1: Rear Panel Voltage Selector, Fuse, AC Receptacle
Handling
Powering the 1503C

Operating Instructions
1–2 1503C MTDR User Manual
The 1503C is intended to be operated from a power source that will not apply more
than250 VRMSbetween thesupplyconductorsor betweeneithersupply conductor
and ground. A protective ground connection by way of the grounding conductor in
the power cord is essential for safe operation.
The AC power connector is a three-way polarized plug with the ground (earth) lead
connected to the instrument frame to provide electrical shock protection. If the unit
isconnectedtoany other power source, the unit frame mustbeconnectedto an earth
ground. See Safety and Installation section.
CAUTION. If you change the voltage selector, you must change the line fuse to the
appropriate value as listed near the fuse holder and in the table below.
FUSE RATING VOLTAGE RATING
250 V NOMINAL RANGE
0.3 A T 115 VAC (90 – 132 VAC)
0.15 A T 230 VAC (180 – 250 VAC)
CAUTION. Read these instructions concerning the care of the battery pack. They
contain instructions that reflect on your safety and the performance of the
instrument.
The1503Ccanbe poweredbyarechargeablelead-gelbatterypackthatis accessible
only by removing the case from the instrument. When AC power is applied, the
battery pack is charged at a rate that is dependent on the battery charge state.
The battery pack will operate the 1503C for a minimum of eight continuous hours
(including making 30 chart recordings) if the LCD backlight is turned off.
The battery pack will charge fully in 16 hours when the instrument is connected, via
the power cord, to an AC power source with the instrument turned off. The
instrument may be turned on and operated while the batteries are charging, but this
will increase the charging time. For longest battery life, a full charge is preferred
over a partial charge.
For maximum capacity, the batteries should be charged within a temperature range
of +20°C to +25°C. However, the batteries can be charged within a temperature
rangeof0°Cto+40°Candoperatedintemperaturesrangingfrom–10°Cto+55°C.
Care of the Battery Pack
Battery Charging

Operating Instructions
1503C MTDR User Manual 1–3
CAUTION. Do not charge battery pack below 0°C or above +40°C. Do not
discharge battery pack below –10°C or above +55°C. If removing the battery pack
during or after exposure to these extreme conditions, turn the instrument off and
remove the AC power cord.
The battery pack should be stored within a temperature range of –35°C to +65°C.
However, the self-discharge rate will increase as the temperature increases.
If the instrument is stored with the battery pack installed, the battery pack should
be charged every 90 days. A fully charged battery pack will lose about 12% of its
capacity in three to four months if stored between +20°C and +25°C.
If the battery is low, it will be indicated on the LCD (bat/low). If this is the case,
protective circuitry will shut down the 1503C within minutes. Either switch to AC
power or work very fast. If the instrument is equipped with a chart recorder, using
the recorder will further reduce the battery level, or the added load might shut down
the instrument.
O
F
F
O
F
F
O
F
F
O
N
1 avg 0.00 dB 5000 ft
bat/low 0.00 ft
50 W 2 ns
Low Battery
Indicator
Figure 1–2: Display Showing Low Battery Indication
Protection circuits in the charger prevent deep discharge of the batteries during
instrument operation. The circuits automatically shut down the instrument
whenever battery voltage falls below approximately 10 V. If shutdown occurs, the
batteries should be fully recharged before further use.
NOTE. Turn the POWER switch off after instrument shutdown to prevent continued
discharge of the batteries.
When the instrument is stored at temperatures below –10°C, voids might develop
in the liquid crystal display (LCD). These voids should disappear if the instrument
is placed in an ambient temperature w+5°C for 24 hours.
Low Battery
Low Temperature
Operation

Operating Instructions
1–4 1503C MTDR User Manual
When operating the 1503C in an environment below +10°C, a heater will activate.
The element is built into the LCD module and will heat the display to permit normal
operation. Depending on the surrounding temperature, it might take up to 15
minutesto completely warm the crystalsin the LCD. Oncewarmed, the display will
operate normally.
Preparing to Use the 1503C
Check the power requirements, remove the front cover, and you are ready to test
cables. The following pages explain the front-panel controls.
O
F
F
O
F
F
O
F
F
O
N
1 avg 0.00 db 2 ns
ac 0.00 ft
MENU
VIEW
INPUT
VIEW
STORE
VIEW
DIFF
STORE
POSITION
INPUT PROTECTED
POWER
(PULLON)
POSITION
NOISEFILTER VERTSCALE DIST/DIV
SET REF
HORZ
VERT
.3.4 .5 .6.7
.8
.9 .00
.01
.02
.03
.04 .05
.06
.07
.08
.09
Vp
METALLIC TDR
CABLE TESTER
1503C
Tektronix
1 3 4 5 6 7
910
11
12
13
14
15
1 ft
50 Ω
IMPEDANCE
2
PULSE WIDTH
8
400 V PEAK MAX
CABLE
Figure 1–3: 1503C Front-Panel Controls
CAUTION.Do not connect to circuits or cables with live voltages greater than 400 V
peak. Voltages exceeding 400 V might damage the 1503C front-end circuits.