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Controller (PC)
26
AWG
Ch. 1 Out
Ch. 2 Out
I In
Q In
I/Q Modulated RF Out
RF Generator
Oscilloscope (DSO)
Discrete I Signal
Discrete Q Signal
I pattern x carrier
Q pattern x carrier
Sum
Figure 32. Quadrature amplitude modulated
(QAM) signal generated by combining an
amplitude modulated cosine carrier (upper) and
an amplitude modulated sine carrier. There are
16 symbols, so this is 16-QAM.
Figure 33. This block
diagram shows the
DUT
setup for quadrature
modulation. For more
information about
suitable RF sources,
contact your local
Tektronix
representative.
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