JDS Uniphase SC-ADSL-A, Руководство пользователя

Страница: 70 / 90

Chapter 7 Interpreting Test Results
Copper results
56 SmartClass ADSL/Copper Tester User’s Guide
Normal resistance should be at least 5 M
Ω
; lower values indicate the presence
of faults.
Table 23 describes the resistance result.
Distance to short
This result measure the distance to the short. A resistance measurement of
4 k
Ω
or less typically indicates a short. For values greater than 4 k
Ω
, this func-
tion is disabled.
Table 24 describes the distance to short result.
Leakage
Leakage is a resistance measurement using higher voltage.
Table 25 describes the leakage result.
Opens/Capacitance
You measure opens/capacitance to:
– measure total electrical loop length (includes length of bridged taps).
– find wet sections, bridged taps or open faults.
Table 23 Resistance result specifications (no ambient)
Range ( Ω ) Resolution ( Ω ) Accuracy
0 to 999 1 2% ± 2.5
Ω
1.0K to 9.99K 10 2%
10.0K to 99.9K 100 2%
100.0K to 999K 1K 2%
1.0M to 9.9M 10K 6.5%
10.0M to 100M 100K 6.5%
Table 24 Distance to short result specifications
Range (feet) Resolution Range (meters) Resolution
0 to 3000 1 foot 0 to 999 3 meters
3000 to 30,000 100 feet 1000 to 10,000 30.5 meters
Table 25 Leakage result specifications (no ambient)
Range ( Ω ) Resolution ( Ω ) Accuracy
0 to 999 1 2% ± 2.5
Ω
1.0K to 9.99K 10 2%
10.0K to 99.9K 100 2%
100.0K to 999K 1K 2%
1.0M to 9.9M 10K 6.5%
10.0M to 100M 100K 6.5%