Omega 1002 Manuale Utente

 

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: 
 
 
 
 
 

t

re

 

t

du

External trigger 

 
 

Symbol Name  Minimum 

Maximum

T

du

 

Duration time 

40ns 

∞

 

T

re

 

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: 

 
 
 
 
 
 
 

DAC 

OME-PCI-

1002 D/O

 

Input Signal

 

Comparator   

TTL buffer

 

External 
Trigger