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•
Generally adjusting the time base lower will result in appropriately Lissajous figures
of better display quality.
1.
Auto measurement mode
2.
Cursor measurement mode
3.
Reference or math waveform
Setting up the Trigger system
•
Triggering decides when the oscilloscope collects data and displays waveforms.
Once the trigger is correctly set up, it can convert unstable display into significant
waveforms.
•
When beginning to collect data the oscilloscope first collects sufficient data to draw
a waveform on the left of the triggering point.
•
While waiting for the triggering condition to occur it will continuously collect data.
When sufficient data to draw a waveform on the right of the triggering point.
•
The trigger control zone on the operation panel comprises a trigger level adjustment
control, a trigger MENU button, 50% button for setting up the trigger level at the
vertical centre point of the signal, and a SINGLE trigger button.
•
Trigger level sets the signal voltage with respect to the triggering point.
•
50% sets the trigger level at the vertical centre point of the trigger signal amplitude.
•
FORCE is used to generate an immediate trigger signal, mainly used in the trigger
mode and normal and single mode to conduct a test.
•
Menu button enables the trigger set up modes.
Trigger Control Mode
•
Trigger modes: Edge, Pulse, Video and Alternate.
Edge Trigger:
•
When selecting edge trigger, you are triggering at the rising and falling edges of the
input signal.
Functions Menu
Type
Signal source
selection
Inclination
Trigger Mode
Trigger coupling
Setup
Edge
CH1
Set Ch1 as the signal source trigger signal
CH2
Set CH2 as the signal source trigger signal
EXT
Set the external trigger input channel as the signal source
trigger signal
EXT/5
Set the external trigger source divided by 5 to extend the
external trigger level range
Rising
Set to trigger on the signals rising edge
Falling
Set to trigger on the signals falling edge
Rise & Fall
Set to trigger on rising and falling edge
Auto
Set to sample waveform only if no trigger condition is
detected
Normal
Set to sample waveform only if trigger condition is satisfied
Single
Set to sample waveform once when detecting one trigger and
then stop
DC
Intercept DC quantities of the input signal
AC
Allow AC and DC quantities of the input signal to pass
H/F reject
Reject high frequency quantities above 80kHz of the signal
L/F reject
Reject low frequency quantities below 80kHz of the signal
Notes
12
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