Oops, no reply. Each has it's own limitations. I think it boils down to:
Generation
1. Arbitrary waveform generator (stand alone, microcontroller, PC based)
2. Multiple Sine wave generators
3. Mechanical - 3 phase generator
4. Derived from 3 phase mains supply.
Amplification/reduction
1. Transformer buck/boost, step-up, step down
2. Resistive voltage divider
3. Variac
4. High voltage OP AMP, see Apex technology (expensive)
5. Audio Amplifier (Some may work with the frequency response network removed)
Measurement
This area is open.
Phase, Voltage, waveform
Some devices may be able to generate the waveform. I think Keithley's (
Keithley Instruments Inc. - A Greater Measure of Confidence) Source Meter lines can. Not sure about syncronization