Model 670C Berkeley Nucleonics Corp. 65 of 96
• Apply the default value: if this option is selected the length of an entry of the sequencer by
default will be equal to the value specified in the Sequencer Item Default Length [N] parameter
Waveform Length Strategy:
This strategy is applied only to the imported waveforms that have a Sampling Rate information like the
.trc files and the files imported/created from the Waveform Editor.
• Use the original waveform duration if possible: if this option is selected, the length of the entry
will be automatically calculated to match the original duration of the imported waveform.
For example, you can playback the waveforms that come from an oscilloscope acquisition (.trc
files only) respecting their original duration.
Please note that it is possible to use the original waveform duration only if the imported
waveform data contains the sampling rate information like the .trc files and the waveforms
created using the Waveform Editor.
Warning: if you change the instrument Sampling Rate, the entry length will not be automatically
recalculated; you must remove the imported waveform from the Sequencer and insert it again.
• Use the waveform length: if this option is selected, the length of the entry will be the same as
the imported waveform length in samples. In this case, the original duration of the imported
waveform will not be maintained.
The length of each entry can be manually and individually overwritten by changing the Entry Length [N]
parameter in the Waveform Parameters section of the Waveform Area. Anyway, if a change in any
channel waveform of the entry occur, the length of the entry will be recalculated using the strategy
specified in the Sequencer item Length Strategy parameter.
Default Entry Length [N]: this parameter specifies the length of the sequencer entries in the case when
the Sequencer item Length Strategy parameter is set to Apply the default value.
Warnings Management: this parameter enables or disables the warnings shown in the Sequencer
Toolbar and in the Waveform Area that notify that one or more channel waveforms have been assigned
to an entry with a different length. This situation will cause the application the modify the mismatching
waveforms during the execution to match the entry length using the strategy specified in the Sample
increasing/decreasing strategy parameter (Device Settings -> General page).
When “Consider a warning as an error” option is selected, the application checks if one or more
sequencer entries have a length that differs from the selected waveform length. If this condition is met,
the instrument will not start.
For example if you insert a SINE waveform with a length of 16384 points into an entry of the sequencer
with Length[N]=1024, when you press the Run button you will get a ‘Start Failed!’ error message; in this
case you have to change the entry Length[N] parameter to 16384 to run the instrument.
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