Promax OD-514B Instruction Manual page 31

5. Functions of HOLD OFF control [31]
When the measured signal is a complex waveform with two or more repetition
frequencies (periods), triggering with the mentioned LEVEL [30] control alone may not be
sufficient to attain a stable waveform display. In such a case, the sweep can be stable
synchronised 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 0.2 s/DIV.
The upper part of the previous figure shows several different waveforms which
overlapped on the screen, making the signal observation unsuccessful when the HOLD
OFF knob [31] is in the MIN state.
The lower part of the previous figure shows the undesirable portion of the signal is
held off. The same waveforms are displayed on the screen without overlapping.
Page 28
Figure 13.- HOLD OFF time adjustment.
OD-514B, OD-515B & OD-545B INSTRUCTION MANUAL
November 2000