Chapter 7
Cable Testing Fundamentals
7-22
Impedance Test
Average impedance is derived from electrical delay and capacitance measurements.
The results of this test are expressed in ohms. Average impedance testing can help
identify physical damage to the cable, connector defects, or cable segments with
incorrect characteristic impedance.
This test uses capacitive measurements; therefore, it is necessary to specify the
correct cable type in order to accurately perform the test.
Note: If a CAT 3 cable is selected (specified as the cable type where PVC is used in the
cable insulation) but a CAT 5 cable (where Teflon
is used as the cable insulation)
is actually used, the average impedance will be calculated incorrectly. To avoid this
problem, be sure to specify the correct cable type.
Note: The RH is not required to perform this test.
Содержание LANTEK
Страница 1: ...IDEAL INDUSTRIES LANTEK CABLE TESTERS USER S GUIDE 01 FEBUARY 2002 MANUAL PART 6510 00 5000 REV A ...
Страница 80: ...Chapter 3 Calibration Configuration and Special Operations 3 39 store up to 10 custom cables ...
Страница 116: ...Chapter 4 Autotesting 4 24 ...
Страница 124: ...Chapter 5 Analyze Testing 5 8 ...
Страница 172: ...Chapter 6 Using LANTEK REPORTER 6 48 ...
Страница 208: ...Appendix A Safety Precautions A 4 ...