Omega 1002 manual Symbol Name Minimum Maximum

The A/D trigger logic can initiate an A/D conversion upon an external trigger. Valid external trigger signals must be TTL compatible and meet minimum pulse width requirements. The requirements are shown below:

External trigger

tdu tre

Symbol	Name	Minimum	Maximum
Tdu	Duration time	40ns	∞
Tre	Recover time	100ns	∞

Note: The OME-PCI-1002 is designed only for time sensitive triggers (trigger is dependent only on the time of the falling edge of signal). For a level sensitive external trigger (trigger is dependent on the level of the input signal), the user can build the following external circuit the OME-PCI-1002:

Input Signal

OME-PCI- DAC 1002 D/O

Comparator

External

Trigger

TTL buffer

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