Multichannel Systems STG1000 Manual - Manual (Page 68)

Stimulus Generator 1000 Series User Manual
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The time lag of the positive phase (for the +U and +I outputs, negative phase for U and I) is
higher than that of the negative phase. If the polarity switches directly from negative to
positive, you will observe a time lag of a few microseconds at 0 V in-between the phases.
For pulses with positive phase (for the +U and +I outputs, negative phase for U and I), the time
lag of the falling edge is negligible in contrast to the time lag of the rising edge. This means,
the increased time lag directly affects the duration of the pulse, that is, positive pulses with low
amplitudes are shortened.
Fig. 7 STG output with programmed biphasic 50 mV pulses, positive phase first, duration 100
μs for each phase.
The positive phase of the +U output (cyan trace) and the negative phase of the U output (yellow
trace) are shortened. The time lag of the positive phase with the rising edge of the Sync Out
output (green trace) as a reference point is 54 μs in this example.