Technical Manual
Table Of Contents
- Table of Contents
- Product Specifications
- Warnings, Cautions, and Notes
- Introduction
- Commissioning
- Tools Required
- Connect to the Main Board
- Commission the DCU
- Installer Commands
- Global Commands
- Administrator Commands (for an LTE Backhaul)
- Alarm Menu
- Manufacturing Menu
- MTU Menu
- Transceiver Menu
- Records Menu
- Power Supply Debug Menu
- Transceiver Debug Menu
- Advanced Menu
- Global Navigation Satellite System (GNSS) Menu
- Maintenance
- Troubleshooting
- Testing the DCU
- Local Menu “WALL” Command Information
- DCU-Generated Headend Messages
- Index
48 D C U M a i n t e n a n c e & O p e r a t i o n M a n u a l
Troubleshooting
• Verify LED conditions match the information indicated in the following
table.
Global Positioning System (GPS) Card
• Verify the GPS board is securely inserted into the backplane.
• Verify the gold cellular cable connector is hand tight.
• Perform more in-depth troubleshooting using the Global Navigation Satellite
System (GNSS) menu. Refer to Global Navigation Satellite System (GNSS)
Menu.
N
OTE
Commands 1 and 2 disable GPS functionality. Command 4 allows you to adjust
the sensitivity threshold for using satellite data. Commands 4 and 5 provide
information regarding how many satellites you are connected to.
Component Function State / Condition
SW1 Switch Resets logic to cellular card
(similar to power failure)
SW2 Switch Internal/Engineering use only
LED 1 Red TX LED Flashing (normal) - Indicates
DCU transmit line to M2M
module
LED 2 Red RX LED Flashing (normal) - Indicates
activity on DCU receive line
from M2M module
LED 3 Red LED ON (normal) - 5 FDC supply
is running
LED 4 Red LED Cellular activity status
LED 5 Red LED GPS activity status
LED 6 Red LED VAUX - Janus cellular card
only