Agilent Technologies N9320A Guide de l'utilisateur télécharger pdf (Page 52)

44 N9320A Spectrum Analyzer

3 Functions and Measurements

Improving Frequency Resolution and Accuracy

This section provides information on using the frequency

counter function to improve frequency resolution and

accuracy.

1 Press > Preset (With Preset Type of Factory)

2 Connect a cable from the front panel CAL OUT to RF IN;

Press > Alignment > Align > CAL OUT ON to toggle on and

enable the 50 MHz amplitude reference signal.

3 Press hardkey.

The analyzer will detect the signal peak and locate it to the

center of the display screen (Refer to “Auto Tune” on

page 75).

4 Turn the frequency counter on:

Press

> Function > Freq Counter > Freq Counter (On).

5 Move the marker, with the front- panel knob, half- way down

the skirt of the signal response.

Figure 14 Using Frequency Counter

Preset/

System

Preset/

System

Auto

Tune

Marker

50.032500 MHz

– 49.30 dBm

NOTE

The frequency and amplitude of the marker appears in the active function

area (this is not the counted result). The counted result appears in the

upper-right corner of the display to the right-side of Cntr1.

Counted result

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 181 182

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Agilent Technologies N9320A Guide de l'utilisateur Page 52