JDS Uniphase OneExpert DSL, User Manual

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Chapter 10 Test Results
Copper results
OneExpert DSL User’s Guide
April 2014 22052280, Revision 001
89
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.
Opens/Capacitance: < 3% difference between Tip (A) and Ring (B) values indicate an acceptably
balanced loop. Anything greater indicates an unbalanced line or open fault, which inhibit digital
signals.
Table 25 describes the opens/capacitance result.
DC current
You measure DC current to verify if enough current is present to operate equipment including the
phone or caller ID boxes.
DC current on Tip (A) to Ring (B) should be

23 mA at the NID. Anything less will not allow for differ-
ences in temperature and phone equipment will not operate during extremes.
Table 26 describes the DC current result.
50 to 999 1 5% ± 2.5

1.0K to 9.99K 10 5%
10.0K to 99.9K 100 5%
100.0K to 999K 1K 5%
1.0M to 9.9M 10K 10%
10.0M to 100M 100K 15%
Table 24 Leakage result specifications (no ambient) (Continued)
Range (

) Resolution (

) Accuracy
Table 25 Opens/Capacitance result specifications (no ambient)
Range (feet)
Resolution
(feet)
Range (meters)
Resolution
(meters) Range
(capacitance) Accuracy (applies to
capacitance only)
0 to 2,999 1 foot 0 to 999 0.1 meter 0 to 47.1 nF 1% ± 15 pF
3000 to 66000 1 foot 1,000 to 20,000 0.1 meter 47.1 nF to 1.57 µF 2%
Table 26 DC current result specifications
Range Resolution Accuracy
0 to 110 ma 1ma 2% ± 1ma