HP 8591C Manual do Utilizador descarregar pdf (Página 177)

100

101

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), (FREQUENCY], 100

and (SPAN), 20

m).

Press

CAMPLITUDE),

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).

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

dB/

MAX

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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