GW Instek GOS-652G - Manual (Page 28)

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(5) Functions of HOLD OFF control:
When the measured signal is a complex waveform with two or more repetition frequencies (periods), triggering with the above
mentioned LEVEL control alone may not be sufficient to attain a stable waveform display. In such a case, the sweep can be stable
synchronized to the measured signal waveform by adjusting the HOLD OFF time (sweep pause time) of the sweep waveform. The control
covers at least one full sweep time for sweeps faster than 0.2s/DIV.
Figure 4-11(a) shows several different waveforms which
overlapped on the screen, making the signal
observation unsuccessful when the
HOLD OFF knob is in the MIN state.
Figure 4-11(b) shows the undesirable portion of the signal
is held off. The same waveforms are displayed
on the screen without overlapping.
4.8 Single-sweep Operation
Non-repetitive signals and one-shot transient signals can hardly
be observed on the screen with the regular repetitive sweep
operation. Such signals can be measured by displaying them in the
single-sweep mode on the screen and photographing them.
Measurement of non-repetitive signal:
(1) Set the TRIGGER MODE to the NORM state.
(2) Apply the measured signal to the vertical input terminal and
adjust the triggering level.
(3) Set the TRIGGER MODE to the SINGLE state (the three push-button switches are pushed out).
(4) Press the SINGLE button. The sweep will run only for one cycle and the measured signal will be displayed only once on the
screen.
Complex waveform
(digital signal) cycle
Figure 4-11(a)
Sweep
waveform
Figure 4-
11(b)
Adjusting the
HOLD OFF
time
Highlighted parts are displayed
Figure 4-11