Triplett RWC1000K/RWC1000NP Instrukcja Użytkownika Pobierz pdf (Strona 63)

61

APPENDIX

Bad cable (Near end short): The error is displayed as follows:

12> 27' SHORT

36> 26' OPEN

45> 25' OPEN

78> 26' OPEN

EXIT DETAILS

12> ------- SHORT

36> 26' OPEN

45> 25' OPEN

78> 26' OPEN

EXIT DETAILS

The SHORT on 12> is most likely at the connector (near end). If the

short is on the FAR END of the cable it would look like this:

Bad cable:

Near End Short

Bad cable:

Far End

Short

OPENs in cable pairs generate errors in both in SKEW tests and

in wire map tests. The following example shows a 200’ cable with

a break in the middle on pair 78. The following is the ﬁ rst screen to

show a problem.

Bad cable:

Open

Note there are two problems shown. The SKEW (difference in DE-

LAY between pairs) is much greater than 50 NS. Another problem

SKEW > 50 NS

LENGTH = 98'

DELAY 148 NS PASS

SKEW 150 NS FAIL

EXIT DETAILS

1 2 ... 58 59 60 61 62 63 64 65 66 67

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