PSI System Controls and Diagnostics
F3200E User Manual
F3200E_UM_180726 Page 73 of 107
the acquisition. Both conditions can be selected, in which case the condition which applies first
will pause the acquisition. The acquisition resumes when the gate defined for start is seen again.
There is no limit to the number of pauses and resumes.
Stopping is optional, but strongly advised if you are buffering contiguous data, to reduce the risk
of buffer overflow. You can stop when a defined Stop Count has been reached, or when the
F3200E detects opposite direction edge on the gate input to that which started the acquisition.
Both conditions can be selected, in which case the condition which applies first will stop the
acquisition.
16.3.2 Pre-defined trigger modes
The F3200E provides a number of pre-defined trigger modes. Most can be achieved by
appropriate Custom trigger settings. Similarly, having chosen one of these preset modes, you can
alter some settings to add extra Burst Size or Stop Count conditions, as if you are using custom
mode. For every trigger mode you can force the F3200E to stop acquisition state at any time by
sending the Abort command.
Mode
Start
Pause
Stop
Notes
Internal
Internal
n/a
n/a
Acquisition will start immediately you send Initiate, and
continue indefinitely if unbuffered, or to the <Stop Count>
if buffered.
Custom
Full user control over start, pause, resume and stop.
External Start
Gate
n/a
n/a
Acquisition will start when a valid trigger edge is seen after
you send Initiate, and continue indefinitely.
External StartStop
Gate
n/a
Gate
Acquisition will start when a valid trigger edge is seen after
you send Initiate. Readings will continue until the opposite
polarity trigger edge is seen.
External StartHold
Gate
n/a
n/a
<Burst Size> is forced to a value of 1 in this mode.
A single reading is taken for each valid trigger edge. This
will continue indefinitely.
External Windowed
Gate
Gate
n/a
Acquisition will start when a valid trigger edge is seen after
you send Initiate. Acquisitions continue until the opposite
polarity edge is seen, at which point the acquisitions pause.
They resume when the next trigger edge is seen.
Sweep
Gate
Gate
n/a
Acquisition will start when a valid trigger edge is seen after
you send Initiate, and <Sweep Length> readings will be
taken. On the next trigger edge another <Sweep Length>
readings will be taken and averaged with the first. This will
continue until <Sweep Averaging> number of sweeps have
been averaged together, and the data will be sent to the host
computer. The averages are reset and the process repeats
indefinitely.
