D/i and d/o, A/d trigger methods, 3 d/i and d/o – Omega 1002 User Manual
Page 9: 4 a/d trigger methods
1.4.3 D/I and D/O
• Channels: 16 channels DI, 16 channels DO
• DO: Digital output port
Output level: TTL compatible
Output current:
I
oh
= 0.5mA, I
ol
= 8mA
• DI: Digital input port
Input level: TTL compatible
Input current: 50uA (max)
1.4.4 A/D Trigger Methods
• Trigger-methods :
1. Software trigger
2. Pacer trigger: 16-bit programmable timer/counter
3. External trigger: Pre-trigger, Post-trigger, external Pacer trigger
External trigger
t
Start End
Post-trigger mode
CHn
External trigger
Start End
CHn
Pre-trigger mode
t
t
Start End
Normal trigger mode
CHn
Pacer or software trigger
t
End
Start
External pacer trigger mode
External trigger
CHn
Figure 1-2. Trigger methods of OME-PCI-1002.
9