Andrew Node G 938 User Manual

Name: Andrew Node G 938
Brand: Andrew
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User’s Manual for Node G

Network Elements

Page 34

M0121A2A.doc

4.3.1. Downlink Final Amplifier

For the Node G x30 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 4-4 Node G x30 MCPA DL final amplifier

For the Node G x38 an SCPA (single carrier power amplifier) is used.

This is a cartesian feedback amplifier for two channels. The advantage of a SCPA is

a higher output power per channel.

figure 4-5 Node G x38 SCPA DL final amplifier

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