H.2
dY/dT Triggering
Basic setting definitions:
dY:
The result of subtracting two ADC values
dT:
Specifies the time between the two samples subtracted
These two setting values are independent of each other. The user therefore
needs to specify both settings explicitly for the trigger unit to do a correct job.
Neither Perception nor the GEN series can recalculate the two settings to
extract a useable setting. It is the user that needs to specify both settings within
limits that the GEN series can use.
Notes on setting definitions:
dY:
Specified in technical user units so the value scales with changes to
technical units. Maximum dY depends on your amplifier range and
technical unit scaling. Perception might turn the background yellow to
inform of a change in the amplifier settings, which is required to be able
to actually generate a trigger for you. Assuming the amplifier is set to
a range of 100 V, and the dY of 110 V can never be measured with this
sensitivity. Applying a technical unit multiplier of 10 or decreasing the
amplifier sensitivity to 200 V range both would make this setting valid.
Do not expect Perception to re
-
calculate the dY/dT of 110 V/10 ms to
55 V/5 ms. Recalculation would lead to completely different trigger
behavior as the noise sensitivity goes down from 110 V to 55 V and
this might not be what is expected.
dT:
Specified in seconds, used in samples. Setting is sample rate
dependent. Maximum dT in samples is 1023. For user convenience,
entry in time is offered, but the hardware works in samples. Therefore,
changing sample rates might make your setting unusable. For
example, 1023 ms is OK as long as the sample rate is 1 kS/s. At
1 MS/s, the maximum dT time is 1.023 ms.
Whenever a dT is unusable with the selected sample rate, the
background of this setting will turn yellow within Perception (Perception
indicates this setting is not valid with the current time base settings that
are dependent on this setting).
Remember:
Always specify your requested dY and dT values the way you expect to GEN
series to look at your signals.
GEN3t
900
I3995-3.1 en HBM: public
