Cronologic Ndigo Crate Guide de l'utilisateur télécharger pdf (Page 22)

Since the triggers are only connected by OR in the triggerblock logic (see ﬁg. 2.19) they are

assigned to one of the gates each and connected with AND via the gating block region of the

trigger matrix (see ﬁg. 2.19 and 2.23). Because of the dead times of the gates it is important

to enable the retriggering feature. Furthermore a precursor of 2 clock cycles is needed, because

the gates are delayed in relation to the ADC samples.

upper threshold

lower threshold

upper level trigger

lower level trigger

upper AND lower

Figure 2.22: Measuring data with amplitude between an upper and a lower threshold by means

of two level triggers.

Conﬁg settings can be found in the following code snippet.

1 c o n f i g . t r i g g e r b l o c k [ 0 ] . e n a b l e d = 1 ;

2 c o n f i g . t r i g g e r b l o c k [ 0 ] . p r e c u r s o r = 2 ;

3 c o n f i g . t r i g g e r b l o c k [ 0 ] . l e n g t h = 0 ;

4 c o n f i g . t r i g g e r b l o c k [ 0 ] . s o u r c e s = NDIGO TRIGGER SOURCE ONE ;

5 c o n f i g . t r i g g e r b l o c k [ 0 ] . g a t e s = NDIGO TRIGGER GATE 0 | ←-

NDIGO TRIGGER GATE 1 ;

6 c o n f i g . g a t i n g b l o c k [ 0 ] . r e t r i g g e r = 1 ;

7 c o n f i g . g a t i n g b l o c k [ 0 ] . s t o p = 0;

8 c o n f i g . g a t i n g b l o c k [ 1 ] . r e t r i g g e r = 1 ;

9 c o n f i g . g a t i n g b l o c k [ 1 ] . s t o p = 0;

10 c o n f i g . g a t i n g b l o c k [ 1 ] . s o u r c e s = NDIGO TRIGGER A1 ;

11 c o n f i g . t r i g g e r [ NDIGO TRIGGER A0 ] . t h r e s h o l d = 10000 ;

12 c o n f i g . t r i g g e r [ NDIGO TRIGGER A1 ] . r i s i n g = 1 ;

13 c o n f i g . t r i g g e r [ NDIGO TRIGGER A1 ] . t h r e s h o l d = −10000;

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