Question

The function of input attenuators in measuring instruments, like VTVM and CRO, is to
1. Increase the input impedance
2. Attenuate the frequency range
3. Attenuate the input signal amplitude without altering the frequency contents
4. Attenuate the input impedances

Answer 1

Correct Answer - Option 3 : Attenuate the input signal amplitude without altering the frequency contents

Attenuators are passive devices which are used to weaken or attenuate the high-level output of a signal generator.

In measuring signals, attenuator pads or adapters are used to lower the amplitude of the signal a known amount to enable measurements, or to protect the measuring device from signal levels that might damage it. While attenuating, the frequency remains unaltered.