Amplitude Calibration - Agilent Technologies 11970 Series User Manual

Operation
Using the Mixers with the 8566B Spectrum Analyzer
stands for locked, or you could press Shift+z to manually harmonic lock.
Figure 2-18
TYPICAL MILLIMETER SIGNAL DISPLAY
A menu of millimeter measurement functions is accessed by pressing , , . Even though the
SHIFT 1 MHz
spectrum analyzer is in an external mixer band, the 8566B spectrum analyzer retains full operation
capability (except for use of the RF input attenuator and preselector).

Amplitude Calibration

Procedure
Each 11970 series harmonic mixer is characterized at the factory and comes with a calibration chart (See
Figure 2-20 on page 58). The horizontal axis of the chart gives the frequency range of the mixer and the
two vertical axis scales are calibrated in conversion loss and in reference level offset.
To correct the amplitude calibration of the spectrum analyzer to account for the conversion loss of the
harmonic mixer, press SHIFT , 1 , MHz , which accesses the millimeter menu. Then press SHIFT , 5 , MHz
to access conversion loss entry and key in the appropriate value on the spectrum analyzer as shown on
the mixer calibration chart.
For measurements that span the entire band, choose an average value of conversion loss from the
conversion loss chart. For those spectrum analyzers with date codes earlier than 13.8.86, the conversion
loss is changed using the reference level function. Press , then , then key in
SHIFT REFERENCE LEVEL
the reference level offset shown on the right side of the mixer calibration chart.
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