Making Basic Measurements Using Spectrum Analyzer Mode

Tracking Unstable Signals Using Marker Track and the Maximum Hold and Minimum Hold Functions

Example: Using the maximumhold and minimum hold functions, monitor the envelopes of a signal.

1.Connect an antenna to the spectrum analyzer input.

2.Press (PRESET), (F R E Q U E N C Y ], 100 m, and (SPAN), 20 m).

3.Press CAMPLITUDE), 9 I-), ATTEN AUTO MAN , 0 [+demv], [SPAN), SPAN ZOOM, 500 @.

Refer to Figure 4-9. Notice that the signal has been held in the center of the display.

4.Turn off the marker track function by pressing MK TRACK ON OFF (OFF).

5.To measure the excursion of the signal, press [TRACE) then MAX BOLD A As the signal varies, maximum hold maintains the maximum responses of the input signal, as shown in Figure 4-9.

PEAK

LOG

10

dB/

MAX

m

MA SI

SC FI

COW

-

Figure 4-9. Viewing an Unstable Signal Using Max Hold A

Annotation on the left side of the screen indicates the trace mode. For example, MA SB SC indicates trace A is in maximum-hold mode, trace B and trace C are in store-blank mode. (See “Screen Annotation” in Chapter 2.)

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