Agilent Technologies 11970-90031 manual Amplitude Calibration, Procedure

Operation

Operation

Using the Mixers with the 8566B Spectrum Analyzer

“Harmonic 6L”, where “L” stands for locked, or you could press Shift+z to manually harmonic lock.

Figure 2-18TYPICAL MILLIMETER SIGNAL DISPLAY

A menu of millimeter measurement functions is accessed by pressing SHIFT, 1, MHz. Even though the 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 2-19). 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 SHIFT, then REFERENCE LEVEL, then key in the reference level offset shown on the right side of the mixer calibration chart.

46 Chapter 2