Setting The Center Frequency, Span, And Reference Level; Setting The Sweep Time; Signal Generator Test Setup Settings - HP 8590 E-Series User Manual

Frequency
Amplitude
Pulse Modulation
1. Set the center frequency of the spectrum analyzer to the frequency of the modulated
signal. Decrease the frequency span of the spectrum analyzer. If necessary, adjust the
reference level of the spectrum analyzer so that the peak signal is displayed near the top
graticule.
PEAK
LOG
VA S#
SC F
CENT
Figure 4-22. Setting the Center Frequency, Span, and Reference Level
Note
The Gate Utility can be used to simplify the following steps. See Chapter 7 for
descriptions of the gate utility softkeys.
2. Set the sweep time to be 401 times greater than the pulse repetition interval. For this
example, the pulse repetition interval is 280 ps, so the sweep time is set to greater
than 401 times 280 US. or 0.112 s. For this example, we are using a sweep time
of 120 milliseconds.' Press @WEEP), 120 @.
REF .E dBm
18
CENTER
4-28 Making Measurements
Setting Signal
Generator 1
50 MHz
-1 dBm
S P A N
COR
50.000 MHz
ES BW 30 kHz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SWEEPTINE
120 ul5ec
I .____.._.: . . . ..__... . . . . . . .._. . . . .._....
50.000 MHz
RES BW 30 kHz
Figure 4-23. Setting the Sweep Time
Signal
Generator 2
50 MHz
-10 dBm
On On
SPAN
ZOOM
:
FULL
ZERO
SPAN
LAST
SPAN
LOCK
SPAN 5.000 MHz
SWEEP
GATE
O N
GATE
MENU
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