Additional Waveform Parameters Section
Preamble Length
The duration of a DC section before the defined Standard waveform starts.
Preamble Level
The level for the DC section before the defined Standard waveform starts.
Acceptable range for this parameter is -1/+1, being the full dynamic range of
the instrument’s DAC.
Postamble Length
The duration of a DC section after the defined Standard waveform stops.
Postamble Level
The level for the DC section after the defined Standard waveform stops.
Acceptable range for this parameter is -1/+1, being the full dynamic range of
the instrument’s DAC.
Keep Periods
This checkbox is only available when “Keep Sample Rate” is selected. When
this option is selected, the waveform calculation algorithm preserves the user-
defined number of periods.
Set WL to Max
This checkbox is only available when “Keep Sample Rate” is selected. When
this option is selected, the waveform calculation algorithm always takes the
maximum waveform length as defined in the “Max. Wfm. Length”. As the
waveform length must always be identical for all four channels, it is
recommended to check the “Set WL to Max” box in case different waveforms
shall be downloaded to different channels.
Periods
The number of repetition of single periods of the standard waveform within the
target segment. This parameter is set automatically when Frequency is
changed and preamble and postamble lengths are set to zero in order to
obtain the best timing accuracy and meet the record length granularity
requirements.
Waveform Length
The length in samples of the resulting segment. It may be set within
acceptable limits and it may be calculated automatically to properly
implement other signal and instrument parameters such as sampling rate.
Max. Wfm. Length
Maximum waveform length must be used to force the resulting waveform to
be shorter than or equal to a user-set limit.
Keep Sample Rate
This check box preserves the sampling rate to a user-defined value no matter
how any other signal parameters may be defined. Keeping the sampling rate
to a fixed value may be necessary when multiple waveforms are created to be
used in a sequence or scenario. The “Set WL to Max” check box gets activated
when this check box is checked.
Set WL to Max. This check box forces the usage of the number of samples
defined in the “Max. Wfm. Length” numeric entry field. Some waveform
parameters may be adjusted to make sure that continuous play-back of the
waveform is seamless.
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