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Chapter 5 AN100U/UX Troubleshooting
Redline Communications Inc. Confidential and Proprietary
Cell Range
The AN100U/UX specifies a maximum distance beyond which SU's will be unable to
register. Verify that this set distance is greater than the distance between the AN100U/UX
and the SU. If not, increase the set value to include all subscriber units within the sector.
Step 1
Log into the Web interface as outlined in “Connecting to the Sector Controller Web Client”
on page 2-4.
Step 2
Click Interface Configuration > Wireless Interface > MAC Parameters.
Step 3
Check the value of Cell Range. The maximum value is 72 km, for devices with software
version 2.1 or higher.
If your subscriber units are beyond this range, contact
[email protected].
Subscriber Unit Distance
The subscriber distance is calculated during subscriber unit network entry.
The distance is calculated during subscriber unit network entry. If the subscriber unit is
continuously registered between 0 and 2.5 km, then the reported distance will be zero.
The only indication that a subscriber unit has disconnected and re-registered further away
is that maximum CINR value at the further location is less than that at 2.5 km. Additonally
if the new location is further than 2.5 km the new distance will be reported.
LO1, LO2 and Radio Reference Frequency Errors
LO1 and LO2 Errors
There are two local oscillators within the sector controller’s ODU. These oscillators, LO1
and LO2 are responsible for different aspects of the RF signal. Primarily the conversion to
the intermediate frequency (IF) is done via the LO2. The conversion from the intermediate
frequency to the actual radio frequency (RF) is done by the LO1.
Errors from either of these oscillators could result from a hardware failure, but may also be
seen in cases where the physical installation of either the IDU or ODU may be incomplete
or incorrect. The associated error message will appear in the event log.
During sector controller startup there is a sequence of messages exchanged between the
IDU and the ODU on the communication channel before the ODU becomes operational.
These messages include the IDU querying the ODU for the following information:
•
Intermediate Frequency (IF)
•
Radio reference frequency
•
Power for the PLL.
Additionally, each local oscillator provides an indication at to whether it is locked or not.
The following errors occur when the local oscillator becomes unlocked:
