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
User’s Manual for Node M and Node C
Network Elements
Page 42 M0121A4A.doc
5.2.7. Downlink Final Amplifier
For the Node M/C x37 an MCPA (multi carrier power amplifier) is used.
This is an error-correcting feed-forward amplifier. It has a high output power while
maintaining superior intermodulation and linearity performance.
figure 5-3 Node M/C x37 MCPA DL final amplifier
For the Node M/C x43 an MCPA (multi carrier power amplifier) with more output
power is used. This is an error-correcting feed-forward amplifier. It has a high output
power while maintaining superior intermodulation and linearity performance.
figure 5-4 Node M 2143 and Node M 1943 MCPA DL final amplifier