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PSI System Controls and Diagnostics
F3200E User Manual
F3200E_UM_180726 Page 29 of 107
Trigger
Trigger
Trigger
Channels
Time
Averaged
data
Successive ADC
conversions
Figure 10. Data acquisition in sweep mode
10.4 Self-testing and calibration
The F3200E has a self-calibration function. It can calibrate itself on all channels fully
automatically, on each of the four ranges. It stores the resulting offset and gain factors in non-
volatile memory so that it can provide results in amperes from then on by reading off linear
calibrations. The calibration sources use high precision, high stability components as these
determine the absolute accuracy of the device.
You can turn on the calibration current at any time and send it to any channel to get a verification
that a channel is functioning normally.
10.5 Monitor output
The F3200E can be set to generate a realtime analog output that can be used to display the signals
on an oscilloscope or meter. The analog voltage is generated by a DAC controlled by the
acquisition FPGA and is updated at up to 400 kHz. It is a computed value which can be the
arithmetic sum of any subset of the input signals, multiplied by a gain factor. In sweep mode, the
gate out signal is set when sweep data is being collected, so its rising transition can be used as a
trigger for the oscilloscope.