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•
When synchronization mode is "odd field", you will
see a screen display as shown.
Alternate Trigger
•
When alternate trigger is selected, trigger signals will
be present in their individual vertical channels. This
triggering mode is suitable for observing two signals
of uncorrelated signal frequencies.
•
Alternate trigger can also be used to compare pulse
widths.
Definitions
1.
Trigger source: Trigger can be obtained from various sources : Input channel (A or
B) and alternate.
•
Input Channel : The most common trigger source is input channel (choose A or
B). The channel selected as trigger source can operate normally only when the
corresponding input channel is on.
2.
Trigger mode: Determine the action of your oscilloscope at trigger by selecting the
mode. This oscilloscope offers three trigger modes for selection: auto, normal and
single.
•
Auto Trigger: The system will acquire waveform data automatically when there is
no trigger signal input. The scan baseline is shown on the display. When the trigger
signal is generated, it automatically turns to trigger scan for signal synchronization.
Note: When time base of the scan range is set to 50ms/div or slower, the
oscilloscope will enter the "Scan" mode.
•
Normal Trigger: In this mode, your oscilloscope samples waveforms only when
triggering conditions are met. The system stops acquiring data and waits when
there is no trigger signal. When the trigger signal is generated, trigger scan occurs.
•
Single Trigger: In this mode, you only have to press the "Run" button once and
the oscilloscope will wait for trigger. One sampling will occur and the acquired
waveform will be displayed when the oscilloscope detects a trigger. Then trigger will
stop.
3.
Trigger coupling: Trigger coupling determines which quantities of the signal
are transmitted to the trigger circuit. Coupling modes are DC, AC, low frequency
suppression and high frequency suppression.
•
DC: Allowing all quantities to pass.
•
AC: Intercepting DC quantities and attenuating signals under 10Hz.
•
Low Frequency Suppression: Intercepting DC quantities and attenuating low
frequency quantities under 80kHz.
•
High Frequency Suppression: Attenuating high frequency quantities over 80kHz.
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