Mohr CT100B Series, Operator'S Manual

Page: 16 / 138

List of Figures
3.43. TDR trace with impedance vertical units demonstrating vertical scale in ohms . . 58
3.44. Example layer peeling trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.1. Options under the Connect to CT Viewer menu. . . . . . . . . . . . . . . . . . . . 65
4.2. Selecting Manual Connect in the Connect to CT Viewer menu will bring up a server
menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
5.1. An open cable fault shows an upward step edge at the location of the fault. . . . . 68
5.2. A short cable fault shows a downward step edge at the location of the fault. . . . . 69
5.3. An open cable fault at 824 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
5.4. Normal SMA female barrel interconnect measuring 52.1 ohms. . . . . . . . . . . . 70
5.5. Comparison of typical SMA and BNC coaxial cable interconnects. . . . . . . . . . 70
5.6. Relationship of impedance to reflection coefficient . . . . . . . . . . . . . . . . . . . 72
5.7. Relationship of return loss to reflection coefficient. . . . . . . . . . . . . . . . . . . 73
5.8. Relationship of voltage standing wave ratio to reflection coefficient. . . . . . . . . . 74
5.9. Simulated comparison of a 90 ps rise time TDR and an 800 ps TDR . . . . . . . . 75
5.10. Comparison of
S
11
return loss of a 2.4 GHz WiFi patch antenna. . . . . . . . . . . 77
5.11. Impedance Smith chart relationships. . . . . . . . . . . . . . . . . . . . . . . . . . . 78
5.12. Layer peeling scattering diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
xiv CT100B TDR Cable Analyzers Operator’s Manual