62 Keysight M8194A 120 GSa/s Arbitrary Waveform Generator User Guide
3 M8194A Soft Front Panel
• Send To Instrument
Signal will be transferred to the selected segments of the selected
channels. The previous running status for the target instrument will be
preserved but sampling rate may be modified depending on the
waveform requirements.
• Set Default
All the Multi-Tone waveform parameters are set automatically to their
corresponding default values. Entries in the Arbitrary Tone table are not
modified by this button.
• Two control sections show-up for equally spaced tone definition
(“Equispaced” selected in the Tone Distribution drop-down list): “Basic
Multi-Tone Waveform Parameters” and “Notch Parameters”.
Basic Multi-Tone Waveform Parameters Section
• Start Frequency
It is the frequency of the first tone. If it is set to a value higher than the
one in the Stop Frequency field, this is changed back to the previous
Start Frequency.
• Stop Frequency
It is the frequency of the last tone. If it is set to a value lower than the
one in the Stop Frequency field, this is changed back to the previous
Stop Frequency.
• Spacing
It is an indicator only. It is calculated as:
Spacing = (Stop Frequency – Start Frequency)/(# of Tones – 1).
• # of Tones
It is the total number of tones in the Multi-Tone signal including the
ones in the notch, if any.
• Phase Distribution
Phase for each tone can be set in the three different modes: constant,
random, and parabolic. While constant phase Multi-Tone signals show
a high crest factor, a random phase distribution results in a much lower
value for this parameter while a parabolic distribution results in a close
to optimal (or minimum) crest factor.
• Seed
This parameter is associated to the random phase distribution and
allows generating the same or different random sequences for the
phases of each tone. It is also useful to look for a distribution resulting
in a desired crest factor value.
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