More about Variable Attenuators
Variable attenuators, like the name suggests are attenuators
whose attenuation amplitude can be changed by varying the voltage or current to
the device. These are used in application where it is required to continuously
vary the signal level.
Type: These are usually Voltage Variable Attenuators or Current Variable Attenuators.
Frequency (MHz): This is the frequency range over which the
attenuator can operate while maintaining its electrical characteristics.
Attenuation Range (dB): This is the ratio of the output and input
power levels. The level of attenuation can be varied by voltage or current.
Power (W): The power that the attenuator can handle.
Impedance (Ohms): The impedance of an attenuator must match
the circuit/system it is connected to; this will minimize any reflection within
the circuit/system. Usually the impedance is 50 Ohms or 75 Ohms.