TDR-410 OPERATING MANUAL version 1.03
17
The measurement has an additional fault if:
- you set an incorrect value of V
P
,
- this ratio is not constant over the measured distance.
Please note that the value of the V
P
factor is smaller for cable wound on the drum than cable uncoiled
/ unwound and installed. Furthermore, it may also change with the cable aging.
The above examples of V
P
factor for different cable types are only an indication for the user
to make swift and calculate the measurement with reasonable accuracy
The use of V
P
allows the highest measurement accuracy calculated by the user with a known
length of the tested cable section, as described in detail in section 3.6.
Typical values of impedance Z
Cable type
Z
Cat 5 STP
Cat 5 UTP
Coaxial air
Coaxial drive
Coaxial PE foam
Coaxial full PE
Symmetrical PE gel
Symmetrical dry PE
Symmetrical PTFE
Symmetrical PVC
Paper 72nF
Paper 83nF
100
100
50/75
50/75
50/75
50/75
100
100
100
100
100
100
Summary of Contents for TDR-410
Page 1: ......
Page 2: ......
Page 6: ...TDR 410 OPERATING MANUAL version 1 03 4 15 ACCESSORIES 19 16 MANUFACTURER 19...
Page 22: ...TDR 410 OPERATING MANUAL version 1 03 20 NOTES...
Page 23: ......
Page 24: ......
