Operator Tutorial
2–4
1503C MTDR User Manual
O
N
ac
10.00 ft
O
F
F
O
F
F
O
F
F
Short
Figure 2–4: Waveform with Short
The distance window still reads 10.00 ft. If the short is not directly across the
conductors of the BNC (e.g., needle nose pliers) the downward edge of the
waveform might be slightly past the cursor, indicating the length of the shorting
device (e.g., jumper wire).
7. Remove the short.
With a little practice, you will be able to identify many kinds of cable faults.
The Waveform Up Close
It helps to know what makes up a pulse. Here is the waveform anatomy using the
93 10-foot test cable as an example:
1. Turn the
n
o
POSITION control counterclockwise until the distance window
reads –2.00 ft. The cursor will be on the far left side of the display and the
reflected pulse will be near center.
O
N
ac
–2.00 ft
O
F
F
O
F
F
O
F
F
Figure 2–5: 10-foot Cable with Cursor at Far Left
Summary of Contents for 1503C
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Page 92: ...Appendix A Specifications A 6 1503C MTDR User Manual...
Page 104: ...Appendis B Operator Performance Checks B 12 1503C MTDR User Manual...
Page 122: ...Glossary Glossary 6 1503C MTDR User Manual...
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