User's Manual
Table Of Contents
- 1. GENERAL
- 2. INTRODUCTION
- 3. CONNECTION SETUP
- 4. INSTALLATION
- 5. FUNCTIONAL DESCRIPTION
- 5.1. DIGITAL ARCHITECTURE
- 5.2. FEATURES
- 5.2.1. Filters Node M
- 5.2.2. Filters Node C
- 5.2.3. Digital ICE (Digital Interference Cancellation Equipment)
- 5.2.4. VSWR (Voltage Standing Wave Ratio)
- 5.2.5. RSSI (Receive Signal Strength Indication)
- 5.2.6. Alarm Forwarding
- 5.2.7. Downlink Final Amplifier
- 5.2.8. Power Supply Unit
- 5.2.9. Modems
- 5.2.10. Digital Channel Module (DCM)
- 5.2.11. External Alarm Controller - EAC-Board
- 5.2.12. Battery Pack - Battery On/Off
- 5.2.13. UL and DL Duplexer
- 6. MAINTENANCE AND REPLACEMENT
- 7. ILLUSTRATIONS
- 8. INDEX
5 Functional Description
Page 49
5.2.11. External Alarm Controller - EAC-Board
5.2.11.1. Connectors on the EAC-Board - Description
The EAC circuit board is used for general purpose housekeeping functions of the
Node.
The EAC circuit board is the main connection point for the user. It has the external
alarm clamps, the connectors for local or modem connection, as well as a summary
alarm relay. The following figure shows an installed EAC-board.
1 2 3
4
figure 5-17 EAC-board, installed
5
6
7
8
9
10
DCM-
A
11
DCM-B DCM-C