Cambium Networks cnWave 5G Fixed, Руководство по эксплуатации и устранению неисправностей

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General Troubleshooting Procedures 72
Test
number Meter positive Meter negative Approximate
value Notes
4 White (pin 3) Brown (pin 1) 0.7 V typical Diode test range (note)
5 Yellow (pin 4) Green (pin 2)
6 White+Yellow
(pins 3+4) Brown+Green
(pins 1+2)
Note
The cnWave™ 5G Fixed B1000 radio includes a reverse-polarity protection diode wire across
the supply. Tests 4, 5, and 6 (as listed above in
Table 6 ) sense this diode and help confirm
the correct wiring.
Testing resistance of the power cable
Before connecting the bottom end of the power cable to the PSU, measure the resistance between pins.
If any of the tests fail, examine the power cable for wiring faults.
Table 4 provides the expected
resistances from the bottom of the cable up to the ODU (which must be connected) and back again. It
must be the same with or without DC-LPUs fitted.
Table 7: Details of the expected resistances
Cable length Approximate resistance (O hm), using 0.75 mm
2
cable
Ft m Between pins 1 and 2
Between pins 3 and 4
Between pins 1 and 3 and
Between pins 2 and 4 Between
any pin
and the
cable
shield
0 0 0.5
>10K
(all cable lengths)
> 100K
(all cable
lengths)
33 10 1.0
66 20 1.5
99 30 2.0
131 40 2.5
164 50 3.0
197 60 3.5
230 70 4.0
262 80 4.5
295 90 5.0
328 100 5.5