Fault Finding
132
10 Fault Finding
If communication has been lost with the unit at the near end of the link then there may be a
hardware fault with the wiring, network or hardware.
Go to the hardware section below.
If
communication with the far end of the link is lost then go to the radio section below.
10.1
Hardware
If there are problems suspected with the link hardware the following procedure is recommended.
10.1.1
Power
Check the power LED at each end of the link. If the power lights are illuminated go to the Ethernet
section below. If at either end they are not illuminated then
check the power source. If neither
is illuminated then there is no voltage on the power wires to the ODU.
•
Check that the mains power is connected and switched on.
•
Check that the power LED illuminates if the ODU connector is disconnected at the PIDU Plus
(Open the PIDU Plus flap on the left hand side).
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 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 led
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.
1. There is no power reaching the ODU because of a wiring fault
2. The ODU is faulty
3. The PIDU Plus is faulty
4. 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.
The power indicator LED should be continually illuminated.
Содержание MOTOWI 4
Страница 1: ...PTP 500 Series User Guide phn 1115 000v001 ...
Страница 74: ...Web Page Reference 74 Figure 37 Save Configuration File Screen ...
Страница 100: ...Web Page Reference 100 Figure 59 Spectrum Management as seen from the Master ...
Страница 108: ...Web Page Reference 108 Figure 66 Spectrum Management Master Screen With Operational Restrictions ...
Страница 112: ...Web Page Reference 112 Figure 68 Remote Management ...
Страница 165: ...Data Rate Calculations 165 Figure 112 QPSK 0 50 Single Payload Figure 113 QPSK 0 75 Single Payload ...
Страница 166: ...Data Rate Calculations 166 Figure 114 16 QAM 0 50 Single Payload Figure 115 16 QAM 0 75 Single Payload ...
Страница 167: ...Data Rate Calculations 167 Figure 116 64 QAM 0 67 Single Payload Figure 117 64 QAM 0 83 Single Payload ...
Страница 168: ...Data Rate Calculations 168 Figure 118 256 QAM 0 75 Single Payload Figure 119 QPSK 0 50 Dual Payload ...
Страница 169: ...Data Rate Calculations 169 Figure 120 QPSK 0 75 Dual Payload Figure 121 16 QAM 0 50 Dual Payload ...
Страница 170: ...Data Rate Calculations 170 Figure 122 16 QAM 0 75 Dual Payload Figure 123 64 QAM 0 67 Dual Payload ...
Страница 171: ...Data Rate Calculations 171 Figure 124 64 QAM 0 83 Dual Payload Figure 125 256 QAM 0 75 Dual Payload ...
Страница 197: ...Glossary 197 UTP Unshielded Twisted Pair VLAN Virtual Local Area Network ...
