RIGOL 
© 2008 RIGOL Technologies, Inc. 
User’s Guide for DS1000B Series 
 
Alternative Trigger 
When alternative trigger is on, the trigger sources come from two vertical channels. 
This mode can be used to observe two non-related signals. You can choose two 
different trigger modes for the two vertical channels. The options are as follows: 
Edge, Pulse and video. The info of the trigger level of the two channels will be 
displayed on the upper-right of the screen. 
 
Figure 2-50    Table 2-28 The Alternative trigger menu (Page 1/2 Trigger Type: Edge) 
CH1-CH2 
CH1
-CH3 
CH1
-CH4 
CH2
-CH3 
CH2
-CH4 
CH3-CH4 
To specify the current alternative trigger 
channels as any two channels selected 
form CH1,
To select vertical channel among CH1, 
CH2,
CH4 in alternative trigger 
mode so as to configure further settings. 
Choose trigger type for the current 
channel.
 
 
Figure 2-51    Table 2-29 The Alternative trigger menu (Page 2/2 Trigger Type: Edge) 
˄ rising 
edge
˅ 
˄ falling 
edge
˅ 
˄ both 
rising edge 
and falling 
edge
˅ 
Trigger on rising edge. 
 
Trigger on falli
 
Trigger on both ring & falling edge.