Agilent Technologies HP 70910A Podręcznik Użytkownika Pobierz pdf (Strona 87)

Chapter 3 87

Operation

Using a PSA Series Spectrum Analyzer

Operation

9. Repeat steps 7 and 8 until the green LEDs are lit at both frequencies without additional

adjustments.

Band Selection

1. If necessary, configure the analyzer for preselected external mixing by pressing the

following keys:

Input/Output, Input Mixer (Ext), Mixer Config, Mixer Type (Presel)

2. If necessary, adjust the tracking of the Agilent 11974 to the analyzer being used for

preselected external mixing, by using the Frequency Tracking Calibration procedure

above.

3. Press the following keys to select the desired mixing band: (In this example, we will use

an Agilent 11974Q (33.0 to 50.0 GHz) to view a 40 GHz, -15 dBm signal.)

Input/Output, Input Mixer, Ext Mix Band, 33-50 GHz (Q)

Amplitude Calibration

1. Enter the conversion loss versus frequency data 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 38.

• Data from the calibration sheet supplied with your mixer.

• From conversion-loss data located on the mixer body label. See “Manually Entering

Conversion-Loss Data” on page 89

2. To correct for the conversion-loss of the harmonic mixer in use, the analyzer amplitude

correction feature is used. Access this feature by pressing,

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. Press Correction until On is

underlined.

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Agilent Technologies HP 70910A Podręcznik Użytkownika Strona 87