Specifications

Chapter 10 85
Using External Millimeter Mixers (Option AYZ)
Entering Conversion-Loss Correction Data for Harmonic Mixers
Using External Millimeter Mixers
(Option AYZ)
Entering Conversion-Loss Correction Data for
Harmonic Mixers
You may want to correct your measurement for the conversion-loss of
the external harmonic mixer that you are using. The amplitude
correction feature can be used for this.
Step 1. Access the correction factor tables for editing:
Press
AMPLITUDE Y Scale, More, Corrections, Other.
You must enter a set of amplitude correction values for the desired
frequency range. Select a correction set for use with external mixing.
The recommended correction set is
Other.
Step 2. Edit the conversion loss data for the mixer in use. For Agilent 11970
Series harmonic mixers and Agilent 11974 Series preselected harmonic
mixers, these values are listed on the mixer:
Press
Edit.
The data consists of frequency/amplitude pairs. You can enter a single
average value for correction over the entire frequency band. Or you can
improve frequency response accuracy by entering multiple correction
points across the band. Up to 200 points may be defined for each set.
Step 3. Once the desired correction points are entered, you must turn on the
correction function to improve display calibration:
Press
Return, Correction (On).
Verify that the correction factors have been applied to the display data
points by checking under the
Corrections menu that Apply Corrections is
set to Yes.
Once you have entered the correction set, save the correction set in
internal memory or on floppy disk for future reference.