Figure 2-21 Third-Order Intermodulation Test Setup - Agilent Technologies 8560E User Manual

Making Measurements
Example 5: Third-Order Intermodulation Distortion
Figure 2-21 Third-Order Intermodulation Test Setup
2. Set one source to 20 MHz and the other source to 21 MHz, for a
3. Set the sources equal in amplitude (for this example, we have set the
Reduce the frequency span
4. Tune both signals onto the display by setting the center frequency to
5. Reduce the frequency span to 5 MHz for a span wide enough to
A quick way to get to a smaller frequency span is to use
NOTE
SPAN ZOOM
zooms down to the span selected by the user.
To activate the span zoom function, press
5 MHz. Be sure to turn signal track off before changing other spectrum
analyzer settings.
Center and adjust the signals on the display
6. Press
7. Using the knob, center the two signals on the display, as shown in
76
frequency separation of 1 MHz.
sources to −30 dBm).
20.5 MHz.
include the distortion products on the display. For frequency
separations other than those used in this example, choose a span
greater than three times the separation of the source signals.
activates a highest-peak marker, turns signal track on, and
.
FREQUENCY
Figure 2-22 on page 77.
SPAN ZOOM
, , and enter
SPAN SPAN ZOOM
Chapter 2
.