Command line interface
6.8.14 TRIGGERIN
Syntax:
TRIGGERIN ENABLE | TRIGGERIN DISABLE
Enables or disables external trigger input, in instruments equipped with this option.
Enabling external trigger input allows you to trigger the DM24 from an external logic
level supplied through its digital output port. This voltage can be between 5 and 10 V
supplied between the
Trigger In
pin and signal ground. If the DM24 is triggered
externally, it will behave exactly as if it had generated the trigger itself, other than
relaying the trigger (see
TRIGGEROUT
, below).
6.8.15 TRIGGEROUT
Syntax:
TRIGGEROUT ENABLE | TRIGGEROUT DISABLE
Enables or disables external trigger output, in instruments equipped with this
option.
Enabling external trigger output allows you to trigger other equipment through a
relay contained within the DM24 whenever it triggers. The DM24's digital output
port contains two pins (
Trigger out, common
and
Trigger out, normally-open
) which
are connected when it triggers. In particular, you can connect a second digitiser
with
TRIGGERIN ENABLE
in effect, in which case triggered data from both
instruments will be transmitted whenever the DM24 triggers.
If a DM24 has both
TRIGGERIN ENABLE
and
TRIGGEROUT ENABLE
in effect,
only
triggers which the DM24 itself has generated will be output. Triggers received
through the
Trigger in
port will cause the DM24 to output triggered streams, but will
not
be passed on to other digitisers, in order to prevent trigger loops.
6.8.16 POLARITY
Syntax:
0 POLARITY
or
1 POLARITY
Sets the sense of the
Trigger In
pin on the
DATA OUT
port.
With
0 POLARITY
set, the
Trigger In
pin is active low,
i.e.
a trigger will be generated
if this pin is connected to ground.
1 POLARITY
switches the pin to be active high.
You must issue
TRIGGERIN ENABLE
to enable external trigger input.
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Issue U - December, 2021
