Motorola PTP 600 System User Manual page 172
Series point-to-point wireless bridges
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- User manual (250 pages) ,
- Parts list (38 pages) ,
- Deployment manual (23 pages)
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If it does illuminate then either the ODU is drawing too much current, or the power wiring to
the ODU is short circuit or the PSU is supplying insufficient power. The likely fault can be
determined by removing the jumper (J906), found inside the removable cover of the PIDU
Plus, and measuring the current taken with an ammeter placed across the 2 jumper pins. This
is normally 10mA without the ODU connected and 300mA to 1A when the ODU is connected.
If it does not illuminate then recheck that power is applied to the PIDU Plus by measuring the
voltage across +55V and 0V pads inside the removable cover in the PIDU Plus. Check that
the PIDU Plus is not short circuit by measuring the impedance across the Power connector. Is
the lamp faulty?
10.1.2 Ethernet
The Ethernet LED is driven from the ODU processor and thus is capable of informing you of
many conditions using different flash sequences. If the Ethernet indicator does not illuminate
at all there are four possible conditions.
•
There is no power reaching the ODU because of a wiring fault
•
The ODU is faulty
•
The PIDU Plus is faulty
•
The Ethernet network side is faulty
Look at the following table to check the LED response for power up, disconnect the power
and reapply and note what happens.
Differentiating between 1-3 and 4 can be achieved by removing the power for 1 second.
Watch the Ethernet indicator for 1 minute, if it never flashes then the problem is 1-3. Take the
jumper (J906) out of the PIDU Plus and check the current taken by the ODU. This should be
300mA to 1A when starting to run normally.
If the Ethernet indicator flashes to begin with but then stops flashing, the ODU is powered and
software loaded but Ethernet connectivity has been lost between the ODU and the users
connected equipment. All Ethernet connections should be rechecked.
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