HP Cable Box 8591C manual Using Marker Tracking to Track an Unstable Signal

Making Basic Measurements Using Spectrum Analyzer Mode

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

5.The signal frequency drift can be read from the screen if both the marker track and marker delta functions are active. Press (MKR), MARKER A ,

I’jMKRFCTN), MK TRACK ON OFF ; the marker readout indicates the change in frequency and amplitude as the signal drifts. (See Figure 4-8.)

MK NOISE

ON OFF

.ENTER 100	0958	MHZ		SPAN	500.0	KHZ
XRES BW	10	kHZ	VBW 10 kHZ	SWP	30.0	mset

Figure 4-8. Using Marker Tracking to Track an Unstable Signal

The spectrum analyzer can measure the short- and long-term stability of a source. The maximum amplitude level and the frequency drift of an input signal trace can be displayed and held by using the maximum-hold function. The minimum amplitude level can be displayed by using minimum hold (available for trace C only).

You can use the maximum-hold and minimum-hold functions if, for example, you want to determine how much of the frequency spectrum an FM signal occupies.

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