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SC-TDC-1000 S Series Manual | Surface Concept GmbH
TimeTag = 6
;must be set for using the state/sign input. Hereby the state/sign input functions in
combination with the tag signal functioning as a counter, counting the external LVTTL
signal applied to the “TAG IN“.
4.2.10 ADC Input (sub-R E8 only)
The SC-TDC-1000 S devices with sub-release E8 come with an integrated 14bit Analog-to-Digital converter
with a differential signal input (“ADC IN +“ and “ADC IN -“) which is laid out for analog voltages between
+10V and -10V.
To work with the ADC the value of the variable named “TimeTag” in the tdc_gpx3.ini file must be adapted
in the following way:
TimeTag = 3
TimeTag = 4
;must be set for using the ADC functionality. This will work also in combination with the
state/sign input and the master reset input. The tag counting is switched off and any
signal to the “TAG IN“ is ignored.
;corresponds to the setting of TimeTag = 3
In case that no differential analogue signal would be available, one can also use a single non-differential
signal. In this case one has to use the positive input (“ADC IN +“) of the ADC, while terminating the negative
input (“ADC IN -“) to ground. Please be aware that this way of operating is working, but it is more prone to
noise.
