User manual

Parameter String Data
Type
Description
"TdcHistogramMode"
ViInt32
The type of histogram for Peak
TDC
mode ONLY.
0 means no histogram. Data only is available for each
acquisition.
1 for a histogram.
"TdcHistogramVertRes"
ViInt32
The vertical resolution of the histogram for interpolated
peaks when the TDCHistogramIncrement is 2 in the
Peak
TDC
mode.
0 means that each bin corresponds to a sampling interval.
≤4 means that each bin corresponds to ½**n of a sampling
interval.
"TdcMinTOT"
ViInt32
The desired minimum width of a peak in the waveform;
It can take on a value (n) from 1 to 4. A peak is accepted if
there are at least n consecutive data samples above the
Threshold. For SimpleTDC mode ONLY.
"TdcOverlaySegments"
ViInt32
This option controls the horizontal binning of data in the
Peak
TDC
histogram mode.
0 means that each segment will be histogrammed
independently.
1 means that all segments will be histogrammed on a
common time axis.
"TdcProcessType"
ViInt32
The desired processing for Peak
TDC
mode peak finding.
May assume
0 = No processing
1 = Standard peak finding (no interpolation)
2 = Interpolated peaks
3 = 8 sample peak regions for data readout
4 = 16 sample peak regions for data readout
"ThresholdEnable"
ViInt32
May assume 0 (no threshold) and 1 (threshold enabled). For
Averagers ONLY.
"TrigAlways" ViInt32
May assume 0 (no trigger output) and 1 (trigger output on),
in the case of no acquisition.
"TriggerTimeout"
ViInt32
Trigger timeout in units of 30 ns in the range [0,2
32
- 1].
A value of 0 means that no trigger will be generated and no
Prepare for Trigger signal will be needed. For
AP101/AP201 ONLY.
"TrigResync" ViInt32
May assume 0 (no resync), 1 (resync) and 2 (free run)
"ValidDeltaNegPeak"
ViInt32
Positive excursion needed to validate a negative peak. May
assume values between 1 and 0xff. For AP101/AP201
ONLY.
"ValidDeltaPosPeak"
ViInt32
Negative excursion needed to validate a positive peak. May
assume values between 1 and 0xff. For AP101/AP201
ONLY.
Discussion
The "TrigResync" values 0 and 1 require a valid trigger, while 2 requires no trigger (useful for background
acquisition).
Set NbrWaveforms to 1 and NbrRoundRobins to n order to enable the round-robin segment acquisition
mode with n triggers for each segment.
The channelNbr is used to designate the channel number for those parameters whose values can be different
for the two channels of an AP240/AP235 in dual-channel mode. These parameters are indicated in bold in
the list above.
The granularity for "NbrSamples","StartDelay", and "StopDelay" is 16 for the AP100/AP101 and the
AP240/AP235 in Dual-Channel mode and 32 for the AP200/AP201 and the AP240/AP235 in Single-
Channel mode.
Programmer’s Reference Manual Page 66 of 210