Guralp Systems CMG-CD24 - Manual (Page 93)

Operator's Guide
7.2.4 Triggering several CD24 digitisers simultaneously
A common use of the external triggering feature is to ensure that all
digitisers in an array trigger at the same time. This can be achieved
with the wiring layout described in this section. With this
arrangement, any digitiser can generate a trigger, which will be passed
on to all the digitisers in the array.
For each digitiser:
•
pins B (power supply ground) and U (trigger input return) of
every digitiser are connected to a common ground;
•
pins T (trigger out, normally-open) and V (trigger in, positive) of
every digitiser are connected to a common trigger line (shown in
orange on the diagram);
•
for each digitiser, pin R (trigger out, common) is connected to
the power supply positive rail via a diode (an IN4001 is
suitable);
•
pins A and B (power supply input) are connected to individual
power supplies as normal; and
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