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2074
User Manual
User QAM
3-50
Amplitude – defines the carrier amplitude level. The same level is
used throughout the instrument when you move from waveform
shape to another.
Offset – defines the offset level for the carrier waveforms. The
same level is used throughout the instrument when you move from
waveform shape to another.
Figure 3-27, 64QAM Display Example
Figure 3-28, 64QAM Data Entry Table Example
The User QAM function is similar to the (n)QAM function except the
symbols and their associated vector positions can be freely
designed at locations that are non-standard. The user QAM display
is shown in figure 3-29. The symbols can be designed on the 2074
display, or on the User QAM Control Data String dialog box as
shown in figure 3-30.
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