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Performance Tests
Frequency Tracking Calibration with an 8566B Spectrum Analyzer
7. Set the spectrum analyzer center frequency to the low end of the band by pressing
CENTER FREQUENCY
Save this setting in an unused register.
for an 11974A: 26.5 GHz
for an 11974Q: 33.0 GHz
for an 11974U: 40.0 GHz
for an 11974V: 50.0 GHz
8. On the rear panel of the 11974, adjust the corresponding potentiometer for the mixer
listed below, until one or both of the green LEDs are lit.
for an 11974A: "26.5 GHz Set"
for an 11974Q: "33.0 GHz Set"
for an 11974U: "40.0 GHz Set"
for an 11974V: "50.0 GHz Set"
9. Change the spectrum analyzer center frequency to the high end of the band as indicated
below, then save this setting in an unused register:
for an 11974A: 40 GHz
for an 11974Q: 50 GHz
for an 11974U: 60 GHz
for an 11974V: 75 GHz
10.On the rear panel of the 11974, adjust the corresponding potentiometer for the mixer
listed below, until one or both of the green LEDs are lit.
for an 11974A: "40 GHz Set"
for an 11974Q: "50 GHz Set"
for an 11974U: "60 GHz Set"
for an 11974V: "75 GHz Set"
11.Repeat
step 7
through
additional adjustments.
NOTE
Upon completion of this adjustment procedure, and before taking data, use
the spectrum analyzer preselector-peak function to peak the 11974 filter on
signals to be measured.
108
and entering the corresponding value for the mixer listed below.
step 10
until the green LEDs are lit at both frequencies without
Chapter 4
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