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2.
Normal Trigger - In this mode waveforms are only sampled when triggering
conditions are met. The system stops acquiring data and waits when there is no
trigger signal. When a trigger is generated, trigger scan occurs.
3.
Single Trigger - In this mode press RUN button once and the oscilloscope will wait
for trigger. When one trigger is detected, it will sample and display the acquired
waveform, then stop.
Trigger coupling - determines which quantities of the signal are transmitted to the
trigger circuit. Coupling modes are DC, AC, low frequency reject and high frequency
reject.
1.
DC - allowing all quantities to pass.
2.
AC - intercepting DC quantities and attenuating signals under 10Hz.
3.
Low Frequency Reject - Intercepting DC quantities and attenuating low frequency
quantities under 80kHz.
4.
High Frequency Reject - Attenuating high frequency quantities over 50kHz.
Pre-Trigger/Delayed Trigger - data sampled before/after triggering. The trigger position
is typically set at the horizontal centre of the screen. You are able to view five divisions
of pre-trigger and delayed trigger information. Use the horizontal position control to
adjust the horizontal shift of the waveform to see more pre-trigger information.
Forced Trigger
Press the FORCE key to generate a forced trigger signal.
If the waveform is not displayed in normal or single shot mode, press the FORCE button
to collect the signal baseline to ensure acquisition is normal.
Edge Trigger:
•
When selecting edge trigger, you are triggering at the rising and falling edges of the
input signal.
•
Press TRIG MENU and press F1 to select the trigger type and use the multifunction
control to confirm.
Functions
Menu
Type
Signal source
selection
Inclination
Trigger Mode
Trigger coupling
Setup
Edge
CH1 to CH4
Set Ch1 to CH4 as the signal source trigger signal
EXT, EXT/5
Set the external trigger input channel as the signal source
trigger signal
AC Line
Set AC line as trigger
Grid
Set up as grid trigger
Alternate
Ch1, CH2 trigger their own signals alternatively
Rising
Set to trigger on the signals rising edge
Falling
Set to trigger on the signals 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 50kHz of the signal
L/F reject
Reject low frequency quantities below 5kHz of the signal
Noise
Suppress the noise of the trigger signal, trigger sensitivity is
Suppression
halved.
Notes
11
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