Users Manual Part 2

RAM Test: N/A, ROM Test: N/A

1 kHZ Presence: N/A

Antenna Status : CONNECTED

Almanac Data : NOT VALID

Location Data : VALID

• The Antenna status is reported as:

- CONNECTED when at least four satellites are being tracked.

- DISCONNECTED when no satellites are being tracked.

NOTICE: If the status is DISCONNECTED, you should verify if the cables are connected

properly. If the status does not change, you should verify that the settings in TESS match

the cable connection (both should be external or internal).

• PDOP: Positional Dilution of Precision it is a measure of geometrical strength of GPS satellite

configuration. The lower value, the better accuracy.

NOTICE: GPS antenna must be connected before the site is powered up to return this

status correctly.

• If the site is being powered up in a new location for the first time, the Almanac Data and the

Location data fields should display a status of Invalid. Use the site_location -reset

command to ensure that the Almanac and Location data are cleared. The Site Controller must then

be reset for these commands to take effect.

• The RAIM (Receiver Automatic Integrity Monitor) facility should be enabled to allow detection and

correction of GPS errors. Refer to the TETRA BTS Service Software (TESS) User Guide.

•

If no other fault, replace the Site Controller.

13.1.3.3

Troubleshooting Site Link Faults

13.1.3.3.1

Initial Verification

Use the ping MMI command to verify that the IP pathway to the two Core Routers is correct. Pings

should be attempted to both Core Routers using both the default ping packet size of 32 bytes as well

as using a packet size larger than the configured Frame relay fragmentation size. If router can be

successfully pinged using the default size of 32, but pings using the large size are unsuccessful, this

indicates an error in the configuration for Frame relay fragmentation.

SC: ping -s 32 172.24.16.201

Pinging 172.24.16.201 (172.24.16.201) with 32 bytes of data:

Reply from 172.24.16.201 bytes=32 time=0ms ttl=30

SC: ping -s 128 172.24.16.201

Pinging 172.24.16.201 (172.24.16.201) with 128 bytes of data:

Reply from 172.24.16.201 bytes=128 time=0ms ttl=30

SC:

6802800U74-AP

Chapter 13: MTS Troubleshooting

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