Test link end hardware
Chapter 8 Troubleshooting
phn-0896_012v000
8-14
Jul 2010
Step
Test
Result
6
Measure the resistance between pins 1 and 3. Subtract
0.2 Ohms.
Ohms
7
Measure the resistance between pins 4 and 7. Subtract
0.8 Ohms.
Ohms
8
Compare the results of steps 1 to 4 and steps 6 to 7 to
the maximum allowed:
If the cable is carrying Ethernet, then the maximum
allowed is 20 Ohms.
If the cable is carrying only power to the ODU
(Ethernet over Fibre only), then the maximum
allowed is 60 Ohms.
If any of the steps 1 to 6 results are greater than the
maximum allowed, the test has failed.
PASS or
FAIL
9
Measure the resistance between pin 1 and the screen
(ODU ground). If it is less than 100K ohms (regardless
of cable length), the test has failed.
K Ohms
PASS or
FAIL
10
Measure the resistance between pin 8 and the screen
(ODU ground). If it is less than 100K ohms (regardless
of cable length), the test has failed.
K Ohms
PASS or
FAIL
11
Measure the resistance between pin 1 and pin 8:
If UltraSync GPS is not fitted, and the resistance is
less than 100K Ohms (regardless of cable length),
the test has failed.
If UltraSync GPS is fitted, and the resistance is less
than 2K Ohms (regardless of cable length), the test
has failed.
K Ohms
PASS or
FAIL
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