1. Follow the normal signal synchronization
procedure and select the edge and trigger source in
trigger [ ]. Adjust the trigger level to make the
waveform display as stable as possible.
2. Press the horizontal [ ] key to display the
3. Adjust the control knob in the
upper front panel The holdoff time will change
accordingly until the waveform display is stable
: Holdoff time is usually slightly shorter
than the Large cycle When observing a Rs232
communication signal waveform it is easier to
observe if holdoff time is slightly longer than the
starting edge time of every data fram
1. The signal used for trigger.
The signal for trigger can be obtained from
various sources : input channel (CH1, CH2, CH3,
CH4), external trigger EXT EXT/5 and LINE
source is to select one of the four input channels.
The channel selected as trigger source can
operate normally whether the input waveform
This trigger signal can be input
directly through the external trigger input terminal. For
example, you can use an external clock or the signal
from a circuit to be tested as the trigger source. The
trigger source uses the input terminal to
ternal trigger signals setup is enabled
when signal trigger level range is 0.8V to +0.8V. To
allow input of larger signal through external trigger, the
trigger signal is divided by 5 in the EXT/5 mode, so that
the trigger level range is extended to 4V to +4V.
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