Codan Radio Communications CASC165A 用户手册

Cascade Power Amplifier

Cascade System Modules Operation Guide

OG-CASC-SYS-MOD-1-0-0P

Digital Control Board

The function of the digital control board is to provide all the management and control functions for the 

PA, generate the supply voltages for the 40dBm stage and manage the communication with the rest 

of the CASCADE subsystem. 

40dBm Stage

The 40dBm stage takes the input signal and amplifies it to the level needed for the 53dBm stage 

to further amplify it to the required power setting. This stage also controls the attenuators in the 

amplification and feedback paths for the proper operation of the Cartesian loop in conjunction with the 

digital control board.

53dBm stage

This stage does the final amplification of the signal and also contains the directional couplers and 

associated circuitry for the monitoring of the output VSWR and for the sampled output feedback 

signal. An harmonic filter is also included in this board.

Isolator

The isolator is integrated into the PA to provide additional protection against bad VSWR conditions.

Alarms and Status

Six LEDs on the front of the PA provide the basic information about the power amplifier status and 

potential fault conditions. These LEDs include DC power, alarm and transmit status indicators; and 

low power, high VSWR and over-temperature fault condition indicators.

Operation

The PA can only be operated as a module or as modules in the CASCADE subsystem. Standalone 

operation is not the purpose of this CASCADE module.