Agilent Technologies 8719D, User Manual

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In standard mixer measurements, the input of the mixer is always connected to the analyzer’s
RF’ source, and the output of the mixer always produces the IF frequencies that are received by
the analyzer’s receiver.
However, the ports labeled RF and IF on most mixers are not consistently connected to the
analyzer’s source and receiver ports, respectively. These mixer ports are switched, depending
on whether a down converter or an upconverter measurement is being performed.
It is important to keep in mind that in the setup diagrams of the frequency offset mode, the
analyzer’s source and receiver ports are labeled according to the mixer port that they are
connected to.
n
In a down converter measurement where the is selected, the
notation on the analyzer’s setup diagram indicates that the analyzer’s source frequency is
labeled RF, connecting to the mixer RF port, and the analyzer’s receiver frequency is labeled
IF, connecting to the mixer IF port.
Because the RF frequency can be greater or less than the set LO frequency in this type of
measurement, you can
select either or .
Figure 6-91. Down Converter Port Connections
Application and Operation Concepts