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Chapter 5 AN100U/UX Troubleshooting
Redline Communications Inc. Confidential and Proprietary
Step 6
Verify that the IF cable path is not shared with any other cables (i.e. AC power cables), as
these cables can cause interference to the communication between the radio and the IDU,
thus triggering the LO1/LO2 error messages. The IF cable should be separately routed and
shielded from any other cables and potential sources of interference, along the entire path
between the ODU and IDU.
Step 7
After verifying all of the information above, reboot the IDU to see ensure the error clears.
See “Rebooting the Devices” on page 3-2.
Step 8
If the error persists, and you have verified the device’s software version, then replace the
ODU hardware. See “Replacing a Radio” on page 4-1 and “Replacing the Antenna” on
page 4-4. Contact [email protected] to obtain an RMA number to
return the equipment to Redline.
Radio Reference Frequency Errors
A related error message, Radio Reference Frequency Error may result.
The radio reference frequency is sent from the IDU to the ODU, and is then passed through
the PLL which generates its own system clock which is then used to program the two local
oscillators LO1 and LO2.
The radio reference frequency is the first check before the LO1 and LO2 are programmed.
This is done during sector controller startup as indicated above.
Once the radio type has been determined and the FPGA boots up it will get its clock signal
from the PLL indicating that the communication between IDU and ODU has been
established.
If the ODU does not receive the correct reference frequency from the IDU or if the
reference frequency is too low, then a Radio Reference Frequency Error will result and the
radio interface will be disabled.
If you observe this error in the event log, then it is possible that the radio is not receiving
the required voltage for the following reasons:
•
the IDU may be defective
•
the communication channel between the IDU and ODU is experiencing errors.
•
if the ODU does not receive the correct Reference Frequency from the IDU, or if the
Reference Frequency is too low, it will result in a Radio Reference Frequency Error,
thus disabling the radio interface.
The troubleshooting procedure is the same as listed above for LO1/LO2 errors with the
following exceptions:
Step 1
After verifying all of the information as outlined in steps 1 to 5 above, reboot the IDU to
ensure the error clears. See “Rebooting the Devices” on page 3-2.
Step 2
If the error persists, and you have verified the device’s software version, then replace the
IDU hardware. See “Replacing the Indoor Unit of the AN100U/UX” on page 3-3.
Step 3
If the error still persists, and you have verified the device’s software version, then replace
the ODU. See “Replacing a Radio” on page 4-1 and “Replacing the Antenna” on page 4-4.
