Caen N6724, User Manual

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ZLE Examples
This sec on reports some examples of ZLE.
1. In the simplest case N
LBK
and N
LFWD
do not overlap . Fig. 7.9 reports the case of posi ve logic on the
le , and nega ve logic on the right. The green areas correspond to the over threshold samples, while
the yellow ones correspond to the under threshold samples:
Fig. 7.9: Example of non-overlapping N
LBK
and N
LFWD
in case of posi ve logic (le ) and nega ve logic (right).
The corresponding channel data is as follows.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
. . .
SIZE CHx
N
1
0 RESERVED
N
GOOD1
= N
LBK
+ N
2
+ N
LFWD
1 RESERVED
SAMPLES
GOOD1
N
3
0 RESERVED
N
GOOD2
= N
LBK
+ N
4
+ N
LFWD
1 RESERVED
SAMPLES
GOOD2
N
5
0 RESERVED
DATA CHx
HEADER
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
. . .
SIZE CHx
N
GOOD1
= N
1
+ N
LFWD
1 RESERVED
SAMPLES
GOOD1
N
GOOD2
= N
LBK
+ N
3
+ N
LFWD
1 RESERVED
SAMPLES
GOOD2
DATA CHx
HEADER
N
2
0 RESERVED
N
4
0 RESERVED
N
GOOD3
= N
LBK
+ N
5
1 RESERVED
SAMPLES
GOOD3
Fig. 7.10: Event format for non-overlapping N
LBK
and N
LFWD
.in case of posi ve logic (le ) and nega ve logic
(right).
2. In some cases the number of data to be discarded can be smaller than N
LBK
and N
LFWD
:
For example, consider the case where N
1
≤
N
LBK
< N
3
and N
LFWD
= 0 (posi ve logic) as reported in
Fig. 7.11 . The corresponding event format is reported on the right. All N
1
samples are tagged as good
and acquired.
Note : The same example can be easily generalized for nega ve polarity.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
. . .
SIZE CHx
N
GOOD1
= N
1
+ N
2
1 RESERVED
SAMPLES
GOOD1
N
3
0 RESERVED
N
GOOD2
= N
LBK
+ N
4
1 RESERVED
SAMPLES
GOOD2
N
5
0 RESERVED
DATA CHx
HEADER
Fig. 7.11: Example with posi ve logic, N
LBK
overlapping with N
1
, and N
LFWD
= 0.
Analogously, in case N
LBK
= 0 and N
LFWD
overlaps with N
5
( N
5
≤
N
LFWD
< N
3
), all samples of N
5
are
tagged as good and acquired (N
GOOD2
= N
4
+ N
5
).
36 UM3247 - N6724 User Manual rev. 10