Voltage Variable Attenuator [hlp]

hello
what is VVA (voltage variable attenuator) and its role in a power amplifier system?

it is an anttenuator controlled by voltage "voltage controlled attenuator".
the role in the power amplifier system , it can control the input power level for the PA to make sure that the output power is constant , it is usually employ PIN diodes

khouly

hello khouly
you wrote
pls explain how it is used in a power amplifier system, for example by a block diagram.

check the picture

khouly

The roll of VVA is to have controlled gain in a system based on the gain requirement, input power etc.