Multichannel Systems STG1000 Manual - Manual (Page 69)

Analog Output Signals
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Fig. 8 STG output with programmed biphasic 50 mV pulses, negative phase first, duration 100
μs for each phase.
This figure shows the output of the same programmed pulse, but with inverted polarities.
Regardless whether the positive or the negative phase comes first, always the positive phase of
the +U output shows a higher time lag and is shorter than the negative phase. If the polarities are
switched directly from negative to positive, there is a time lag at 0 mV between the phases.
Deviation of the amplitude
If the resulting pulse is much too short, the electronics might also not be able to reach the
setpoint voltage or current in the short time, resulting in a deviation of the amplitude, too.
Pulse protocols that are programmed near the resolution limit of the STG, that is, with very small
amplitudes and short pulses (for example, 50 mV and 20 μs) may not generate any output at all.
If you have a pulse train with very short pulses near the resolution limit of the STG, the
amplitude of the first pulse in the train might be lower than the following pulses.