I am working on a document that discusses function generators and arbitrary waveform generators. It is aimed roughly at folks in technician and beginning engineering/science positions. It acknowledges the usefulness of function generators for a variety of tasks, looks at the DDS method of waveform generation (probably used in most modern equipment), and shows some typical applications. I'd like to ask this group of experts for some suggestions about interesting uses of these instruments. My goal is to make the examples interesting, practical, and accessible to the average reader. Here are the example applications I have either worked on so far or am considering (they generally assume the use of a scope): Troubleshooting: identifying a bad subsystem in a system by injecting a signal into the first subsystem and checking its output, moving to the next subsystem and repeating. Same as previous, but starting from the last subsystem and working backwards. Measuring the ESR of a capacitor in circuit (can use an AC voltmeter instead of the scope). Time domain reflectometry: I show scope traces of reflected pulses in a network cable. Response testing by sweeping. Response testing using square waves, pulses, and noise. How to use a power supply to change the DC offset of a function generator. The examples are practical and, where possible, show the results of building the indicated circuit and making the measurements shown. I'm aware of B&K's old function generator guidebook and I've looked at a few Agilent and Tek app notes. I look forward to your creative ideas!