Motorola PTP 500 Series - Table 16 - Resistance Table Referenced to the RJ45 at the PIDU Plus

9 Troubleshooting (Fault Finding)
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Table 16 - Resistance Table Referenced To The RJ45 at the PIDU Plus
Resistances should fall within + or -10% of the stated values.
CAT-5
Length
(Meters)
Resistance between
pins 1&2, 3&6 , 4&5 and
pins 7&8 (ohms)
Resistance between
pins 1&3 (ohms)
Resistance
between pins 4&7
(ohms)
0 0.8 1.0 1.6
10 2.7 2.7 3.3
20 4.6 4.4 5.0
30 6.5 6.1 6.7
40 8.3 7.8 8.4
50 10.2 9.5 10.1
60 12.1 11.2 11.8
70 14.0 12.9 13.5
80 15.8 14.6 15.2
90 17.7 16.3 16.9
100 19.6 18.0 18.6
150 29.0 26.5 27.1
200 38.4 35.0 35.6
250 47.7 43.5 44.1
300 57.1 52.0 52.6