CAEN
Electronic Instrumentation
UM3148
–
DT5730/DT5725 User Manual rev. 2
39
Trigger Distribution
As described in §
Trigger Management
, the OR of all the enabled trigger sources, synchronized with the internal clock,
becomes the common trigger of the board that is fed in parallel to all channels, consequently provoking the capture of
an event. By default, only the Software Trigger and the External Trigger participate in the common acquisition trigger
(refer to the red path on top of
Fig. 9.17
).
A Trigger Out signal is also generated on the relevant front panel GPO connector (NIM or TTL), and allows to extend the
trigger signal to other boards. Thanks to its configurability (see
Fig. 9.17
), GPO can propagate out:
-
the OR of all the enabled trigger sources (only the Software Trigger is provided by default, as in the red
path of
Fig. 9.17
);
-
the OR, AND or MAJORITY exclusively of the channel trigger requests.
TRG_REQ[3:0]
GPO
0x8110
Bits[9:8]
00
01
10
TO THE CHANNELS
COMMON ACQUISITON TRIGGER
0x811C
Bits[17:16]
3
3
00
01
MB PROBES
10
PB PROBES
11
GPI
3
SW TRG
EXT TRG
MASK 1
0x810C
Bits[3:0]
MASK 4
0x8110
Bits[3:0]
OR
AND
MAJORITY
OR
MASK 2
MASK 3
0x810C
Bits[31:30]
0x8110
Bits[31:30]
SW TRG
EXT TRG
OR
TRG SOURCES
0x8110
Bits[12:10]
EXT TRG
SW TRG
Fig. 9.17
: Trigger configuration on GPO front panel output connector
The registers involved in the GPO programming are:
-
Register address 0x8110;
-
Register address 0x811C.
Note:
Refer to
[RD2]
for registers complete description.