Pulsetrain: a collection of pulses/bursts/wavelets from minutes to several hours, describing a complete experience.
Carrier frequency: stereostim only term, not applicable to pulse-based boxes. The frequency of the sine wave that makes up the base of the signal, usually around 500-1000hz.
Wavelet: Stereostim term, a signal of a few carrier cycles long with amplitude envelope going to zero at the boundaries. Confusingly called a "pulse" in Restim. Usually 1-10ms
Burst: pulse-based equivalent of a wavelet, a group of pulses usually 1-10ms. Can also use the term wavelet.
Pulse: smallest building block of the signal for pulse-based devices. Sometimes used to refer to a small group of pulses ('biphasic pulse'). Usually <0.5ms.