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32 Chapter 2
Operation
Using the Mixers with the 856X Series Spectrum Analyzers
Operation
In this example, we’ll look at U-band, which ranges from 40 GHz to 60 GHz, as shown in
Figure 2-9. The
LOCK HARMONIC function “locks” the spectrum analyzer in that band,
ensuring that the spectrum analyzer sweeps only the chosen band.
LOCK ON OFF is
automatically set to ON when
FULL BAND is pressed.
Figure 2-9 Select the band of interest.
Save the average conversion-loss value
4. Default conversion-loss values that are stored in the analyzer for each frequency band
are listed in Table 2-1. These values approximate the values for the Agilent 11970 series
mixers. Other conversion-loss values may be entered into the spectrum analyzer in two
ways. The first method lets you to save the average conversion-loss value for the entire
band using
AVERAGE CNV LOSS. To activate this function:
a. Press
AUX CTRL, EXTERNAL MIXER, AMPTD CORRECT, AVERAGE CNV LOSS.
b. Enter the appropriate average conversion-loss value. On Agilent 11970 Series
harmonic mixers, these values are printed on the mixer. The U-band mixer used for
this example had an average conversion loss of 23.5 dB, as shown in Figure 2-10.