55
Test-Um NT955 Series
A
PASS
or
FAIL
indication will be briefly displayed along with a speed
rating up to 1 Gigabit depending on the cable type. The screen will show
the Remote ID, wiremap of the individual pairs, and automatically scroll
down to display Length, Skew, SNR and BERT test results. The lights on
the remote unit flash sequentially to indicate a PASS condition. The job
file is saved after every Auto Test.
Then the Cable Test Schedule displays the results and the test highlight
automatically increments to the next cable in the list. The Voice over
IP icon (VoIP) displays if the cable test results indicate a speed rating
of 100MB or greater. You can go back to the previously tested cable
by using the arrow navigation buttons and the Results soft key (F2) to
inspect the specific test measurements, the speed test results, and the
wire map conditions of each individual pair on the cable. Use the Arrow
keys to scroll down this screen.
Interpreting Wiremap Errors:
The following four classes of wiring
errors cause cables to FAIL. Errors are reported in order of severity. The
severity refers to the ability of a more severe error to mask lower severity
errors. For example, if there is a short in the cable, miswires and split
pairs may be detected for the pairs involved in the short fault.
Short -
The pair has a low resistance connection between wire pairs or
the shield. The wire pairs involved and the distance to the short in feet or
meters displays in red on the wiremap screen.
(See Figure 4.3 & Figure 4.4)
Test Results
Untitled1.job
Expected
Results
1 1
2 2
3 3
6 6
4 4
5 5
7 7
8 8
Cable001
Fail
1 1
2 2
3 3
6 6
4 4
5 5
7 7
8 8
Test Time: 10:53 Thu 2005 Aug 25
BACKSPC
PG UP
PG DOWN
Test-Um Inc.
validator
100%
2005 Aug 25
10:53:01
CAT5E
1 Gbit/s
Remote ID: 1
Figure 4.3 Test Results Short on Pair 4 and 5
Validator
TM
How AutoTest Works
Validator
TM
How AutoTest Works
