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Options and Accessories
1503C MTDR User Manual
3–13
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0.00 ft
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Figure 3–10: System 2 - Cable w/ Revision One Repeater *
(1 avg, 200ft/div, 2.25dB)
* Revision One repeaters must sense collisions and place a jam signal on both segments. When using the
carrier sense voltage level while sending out pulses (e.g., Single Sweep with Carrier is: On) the pulses
might exceed the collision or traffic thresholds of the repeater, causing it to send back jamming packets
that are synchronized with the 1503C. This creates an unusual waveform that looks similar to data. As
a rule, repeaters should be shut down prior to testing a segment to prevent such occurrences.
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ac
484.56 ft
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Figure 3–11: System 2 - First Tap, No Traffic
(1 avg, 1 ft/div, 44.5 dB)
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ac
484.56 ft
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Figure 3–12: System 2 - Same Tap with 5% Traffic
(1 avg, 1 ft/div, 44.5 dB)
Summary of Contents for 1503C
Page 4: ......
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...
Page 127: ......
Page 128: ......