2-11
IM 701730-01E
Explanation of Functions
2
• TV Trigger <For the setup procedure, see section 6.14>
This trigger is used when observing video signals. The following broadcasting types
are supported: NTSC, PAL, SECAM, 1080/60i, 1080/50i, 720/60p, 480/60p, 1080/
25p, 1080/24p, 1080/24sF, and 1080/60p.
Trigger Mode <For the setup procedure, see section 6.1>
Sets the conditions for updating the displayed waveforms. The following five trigger
modes are available.
Auto Mode
If a trigger occurs within a specified amount of time (approximately 100 ms, referred to
as the timeout time), the displayed waveforms are updated. If a trigger is not activated
within the timeout time, the displayed waveforms are automatically updated.
Auto Level Mode
If a trigger occurs within the timeout period, the waveform is displayed in the same
fashion as in auto mode. If a trigger is not activated within the timeout time, then the
center value of the amplitude of the trigger source is detected, and the trigger level is
changed to that value. A trigger is activated using the new value, and the displayed
waveforms are updated.
1/2 the amplitude
1/2 the amplitude
Trigger level
Amplitude
Normal Mode
The displayed waveforms are updated only when a trigger occurs. The displayed
waveforms are not updated if a trigger does not occur.
Single Mode
When a trigger is activated, displayed waveforms are updated only once, then
acquisition stops. This mode is useful when you are observing a single-shot signal.
Single(N) Mode
Waveforms are acquired and stored in different memory areas each time a trigger is
activated the specified number of times. Then, acquisition is stopped, and all the
acquired waveforms are displayed. For details on the acquisition method of waveforms in
Single(N) mode, see “Sequential Store” on page 2-16.
2.3 Triggers