Agilent Technologies 11867A? Manuel de service télécharger pdf (Page 73)

Chapter 5 75

Spectrum Analyzer

Making a Basic Measurement

Spectrum Analyzer

Reading Frequency & Amplitude

1. Place a marker (labeled 1) on the 10 MHz peak, as shown

in Figure 5-2.

Press

Peak Search. If necessary, use the menu keys to move the

marker to the proper peak. In addition, you can go to the Marker

menu (press Marker) and use the knob or arrow keys to move the

marker.

Note that the frequency and amplitude of the marker appear in the

upper-right corner of the screen.

2. If you have moved the marker, return it to the peak of the 10 MHz

signal.

Figure 5-2 A Marker on the 10 MHz Peak

Changing Reference Level

1. Press AMPTD Y Scale, and note that reference level (Ref Level) is now

the active function. Press

Marker ⇒, Mkr ⇒ RL.

Note that changing the reference level changes the amplitude value

of the top graticule line.

Figure 5-3 shows the relationship between center frequency and

reference level. The box represents the analyzer display. Changing

the center frequency changes the horizontal placement of the signal

on the display. Changing the reference level changes the vertical

placement of the signal on the display. Increasing the span increases

the frequency range that appears horizontally across the display.

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Agilent Technologies 11867A? Manuel de service Page 73