UTD1000L User Manual
48
has improved compared with main time base (as
shown in picture 6-5). As waveform displayed by
the whole lower half part is corresponding to the
upper half part sector, it is able to improve
extension time base by adjusting key s~ns to
reduce selected area thus increasing horizontal
extension times of waveform
In the horizontal setting menu and display status of
menu press left right key to adjust holdoff time
(100ns-1.5s) Use trigger holdoff time adjustment
to observe complet waveform (ex. pulse serial).
Holdoff time is to adjust the data collection period
of oscilloscope, integral multiple of and
sychoronous to the period of complex waveform
being measured.
For example: the signal being measured is a
combination wave signal imposed on the
channel CH1 Press key HORIZONTAL to open
horizontal setting menu and press key left/right to
adjust holdoff time, the trigger holdoff time shall
vary with it till the waveform display is stable as
shown in the following picture
Picture 6-6 Trigger Holdoff
1. Trigger holdoff time only be adjusted under the
menu display status.
2. Holdoff time is generally slightly shorter than
big period
time In observing the signal of
RS232 communication, the holdoff time is frame
is slightly shorter than the start edge time of each
frame data, it is easy to get stable synchronization.
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Trigger Holdoff Time Adjustment
Notes:
