Digital multimeters have a wide variety of users, each with their own sets of needs:

A traditional Spectrum Analyzers works by making power versus frequency measurements by sweeping through the passband of its resolution bandwidth (RBW) filter.

Arbitrary waveform generators (AWGs) are the most versatile signal generators available.

This is how to use a function generator to test a circuit’s behavior

Single-ended signs are referenced to a frequent degree, such as floor, they can talk about with different signs, therefore a single-ended signal requires just a single route or cable.

Pulse/pattern generators, create an electronic choice of square pulses. They have the capability of correcting the electric characteristics of the output signal, for example rise/fall time, signal drive power, jitter, etc.