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Chapter 2 27
Operation
Using the Mixers with the E4440A, E4446A, or E4448A PSA Series Spectrum Analyzer (Option
AYZ)
Operation
2. On the analyzer, press Preset, Factory Preset, if present.
3. Select external mixing by pressing
Input/Output, Input Mixer, Input Mixer (Ext).
4. The analyzer frequency band will be set to
26.5 - 40 GHz (A). To choose a different band,
press
Ext Mix Band , then press the desired band frequency range/letter key. For this
example, we will use band A, which ranges from 36.5 GHz to 40 GHz.
Amplitude Calibration
The conversion loss versus frequency data can be entered on your analyzer from one of
three sources.
• From a Conversion Loss Data Disk, supplied with your mixer. See “Using a
Conversion-Loss Data Disk with the ESA or PSA Series Analyzers” on page 21 .
• Data from the calibration sheet supplied with your mixer.
• From conversion-loss data located on the mixer body label.
Manually Entering Conversion-Loss Data
1.The analyzer frequency band will be set to
26.5 – 40 GHz (A). To choose a different band,
press
Ext Mix Band and then press the desired band frequency range/letter key. For this
example, we will use band A, which ranges from 26.5 GHz to 40 GHz.
NOTE To correct for the conversion-loss of the harmonic mixer in use, the analyzer
amplitude correction feature is used.
2. Press
AMPLITUDE Y Scale, More , Corrections. Select a correction set for use with
external mixing. The recommended set to use is
Other although any available set could
be used.
3. Press
Edit to enter the appropriate conversion loss data for the mixer in use. These
values are listed on the mixer, or a calibration sheet that is supplied with the mixer.
NOTE More correction points entered across the band in use will improve frequency
response accuracy. Up to 200 points may be defined for each set.
4. Once the desired correction points are entered, press
Return, Correction (On) to activate
correction set
Other. This will also turn corrections on resulting in a calibrated display.
It is recommended that the correction set entered be saved on the internal memory or
the floppy drive for future reference. See the ESA User’s and Programmer’s Reference
guide for information on saving correction values.