HP 8591C Manuel d'utilisateur télécharger pdf (Page 192)

100

101

Making Basic Measurements Using Spectrum Analyzer Made

Identifying Distortion Products Using the RF Attenuator and Traces

Example: Using a signal from a signal generator, determine whether the

harmonic distortion products are generated by the spectrum analyzer.

1. Connect a signal generator to the spectrum analyzer’s INPUT 75

Set the

signal generator frequency to 200 MHz and the amplitude to 0

dBm.

Set the center frequency of the spectrum analyzer to 400 MHz and the

span to 500 MHz: press [FREQUENCY), 400

IIVIHz),

ISPAN)

500 (MHz). The

signal shown in Figure 4-20 produces harmonic distortion products in the

spectrum analyzer’s input mixer.

2. Change the span to 200 MHz: press

ISPAN),

200 (MHz).

Change the attenuation to 0

dB:

press

c-1,

ATTEN

AUTO MAN , 0

(dBmV).

4. To determine whether the harmonic distortion products are generated by

the spectrum analyzer, first save the screen data in trace B.

Press

Cm),

TRACE

A 3

(until trace B is underlined), then

CLEAR WRITE B Allow the trace to update (two sweeps) and press

VIEW

, [PEAK SEARCH), MARKER A The spectrum analyzer display

shows the stored data in trace B and the measured data in trace A.

5. Next, increase the RF attenuation by 10

dB:

press

(j-1,

ATTEN

AUTO MAN , and the step-up key

(m)

once. (See Figure 4-21.)

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HP 8591C Manuel d'utilisateur Page 192

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