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Applications
Applications summary
The 2026 Multisource Generator supports a number of measurement applications which require
more than one signal source to be coupled together. In addition to automatically selecting the
most appropriate signal routing format, the applications mode also automatically couples the
sources together and modifies the descriptions of the parameters entered to best suit the
application. This considerably simplifies control of the sources and provides a clearer description
of the measurement being performed.
Whenever an application is selected, the signal routing can be displayed in graphical form to
ensure that the user understands how the sources are connected to the RF connectors. In addition,
a stylized spectral diagram can be displayed which shows how the main control parameters are
used in the test.
Some applications, such as 3-tone intermodulation measurements, cannot be performed using the
internal sources of a generator fitted with only two sources. In these circumstances this is clearly
indicated on the selection menu.
Applications selection
To select one of the predefined applications press the [Appl’n Menu] key on the Setup Menu. This
causes the Applications Selection Menu (similar to that shown in Fig. 4-5) below to be displayed.
B3415
Fig. 4-5 Applications selection menu (shown for three sources fitted)
This menu enables you to perform two- and three-tone intermodulation distortion tests on an
amplifier, make a two-tone intermodulation measurement on a receiver or carry out a receiver
selectivity test. Intermodulation tests require the presence of one or two strong interfering signals
whose intermodulation products fall in the receiver’s or amplifier’s input frequency band.
Note that when two sources are fitted the [Receiver 2tone IM] key does not appear so this test
cannot be selected.
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