List of Figures
3.1. Example nameplate label found on back of a CT100B . . . . . . . . . . . . . . . . . 11
3.2. Diagram of the CT100B front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3. Diagram of the rear panel of the CT100B/CT100HF . . . . . . . . . . . . . . . . . . 14
3.4. Keyboard controls for front panel buttons and knobs . . . . . . . . . . . . . . . . . . 15
3.5. The Reset Options menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.6. The two versions of the Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.7. Example of a dialog box with entries to be filled in . . . . . . . . . . . . . . . . . . . 31
3.8. Example of a dialog box with a scrollable list of items . . . . . . . . . . . . . . . . . 32
3.9. Screenshot showing typical features of the CT100B . . . . . . . . . . . . . . . . . . . 33
3.10. A small fault in a long cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.11. Example trace with impedance (ohms) as vertical unit . . . . . . . . . . . . . . . . . 36
4.1. Clip lead adapter and controlled impedance adapter . . . . . . . . . . . . . . . . . . 40
4.2. An open fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.3. A short fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.4. A scan of an SMA connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.5. Screenshot showing AUTOFIT result . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.6. Use of HORIZONTAL SCALE knob to improve Vp accuracy . . . . . . . . . . . . . 44
4.7. Final Vp of the cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.8. Smoothed vs. unsmoothed traces at very small vertical scales . . . . . . . . . . . . . 46
4.9. AUTOFIT cable. The cable termination is a short . . . . . . . . . . . . . . . . . . . 47
4.10. Vertical scale used to emphasize cable fault . . . . . . . . . . . . . . . . . . . . . . . 47
4.11. A zoomed in view of the cable fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.12. Relative distance measurement between two impedance “faults” . . . . . . . . . . . . 49
4.13. The Set/Clear Zero Offset button on the Display menu . . . . . . . . . . . . . . . . . 50
4.14. The Zero Offset menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.15. Zero Offset applied to a trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.16. Multi-segment cable segment with Vp of 0.400 . . . . . . . . . . . . . . . . . . . . . . 52
4.17. Multi-segment cable segment with Vp of 0.850 . . . . . . . . . . . . . . . . . . . . . . 52
4.18. Scan of a portion of a cable, zoomed-in vertically . . . . . . . . . . . . . . . . . . . . 53
4.19. Scan progress display with Cancel button . . . . . . . . . . . . . . . . . . . . . . . . 54
4.20. Selecting the live trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.21. Selecting a scanned trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.22. Selecting a difference trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.23. The Annotations selection in the Scan menu . . . . . . . . . . . . . . . . . . . . . . . 57
4.24. The Annotations menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.25. Use Set Start Point to annotate a specific point on a trace . . . . . . . . . . . . . . . 58
4.26. Use Set Start Point and Set End Point to annotate a range of points on a trace . . . 58
4.27. The annotations list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.28. Annotations appear as arrows on the trace . . . . . . . . . . . . . . . . . . . . . . . . 59
CT100B TDR Cable Analyzers Operator’s Manual xiii
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