Any difference between fixed attenuators and rotary attenuator

Yes, there is a difference between fixed and rotary attenuators.

Fixed attenuators are a type of passive electronic device that reduce the power or amplitude of an electrical signal by a fixed amount. They are typically constructed using resistors and can be used to match the impedance of a transmission line, reduce the power of a signal, or reduce noise. Fixed attenuators are typically used in applications where the amount of attenuation is known and does not need to be adjusted.

Rotary attenuators, on the other hand, are a type of variable attenuator that can be adjusted to reduce the power of a signal over a range of values. They are typically constructed using a potentiometer, which can be turned to increase or decrease the resistance, and thus the level of attenuation. Rotary attenuators are used in applications where the amount of attenuation needs to be adjusted on the fly, such as in audio and communication systems.

In summary, fixed attenuators provide a fixed amount of attenuation and are used in applications where the amount of attenuation is known, while rotary attenuators provide variable amounts of attenuation and are used in applications where the amount of attenuation needs to be adjusted.