Trigger
53
9.1
Trigger Source
The 2560B Series trigger source includes four analog channels sixteen Digital channels, Ext, Ext/5, and AC line.
The trigger source is the signal that will be compared to the logical conditions you set to generate a trigger event. The
most common trigger source is the signal on one of the analog input channels, but the EXT connector on the back panel
can be used to trigger on an external signal.
When looking at waveforms that are derived from the AC line power,
you’ll
probably want to use the AC line as the
trigger source. For example, to measure the 120 Hz ripple in a voltage regulator circuit,
you’d
want to trigger on the 60
Hz AC line for a stable signal.
The trigger sources supported by each trigger type are different. Reference table
??
for more details.
Table 9.1
Trigger Source
Once a trigger type has been selected set the trigger source:
1.
Press the Setup key or use the touchscreen controls to select
Trigger > Menu...
to enter the
Trigger
menu.
2.
Use the touchscreen controls to select
Source
.
–
The
Source Setting
window will appear.
–
Use the touchscreen controls to navigate the available trigger sources.
The currently selected trigger source is displayed at the upper right corner of the
Trigger dialog box as shown in figure
Figure 9.2
Selected Trigger Source
Trigger Type
C1 C4
EXT, EXT/5
AC Line
D0 D15
Edge
√
√
√
√
Slope
√
X
X
X
Pulse
√
X
X
√
Video
√
X
X
X
Window
√
X
X
X
Interval
√
X
X
√
Dropout
√
X
X
√
Runt
√
X
X
X
Pattern
√
X
X
√
Serial
√
X
X
√
Содержание 2560B Series
Страница 1: ......
Страница 51: ...Digital Channels 51 Figure 8 9 Digital Bus...
Страница 127: ...Serial Trigger and Decode 127 Figure 10 63 Manchester Bus...
Страница 168: ...Reference Waveform 168 Figure 14 1 Recall REFB...
Страница 210: ...Save Recall 210 Figure 22 4 Save As...
