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42 Chapter 3
Making a Basic Measurement
Viewing a Signal
Making a Basic Measurement
Figure 3-2 Span Changed to 50 MHz
Reading Frequency & Amplitude
7. Place a marker (labeled 1) on the 10 MHz peak, as shown
in Figure 3-3.
Press
Peak Search.
Note that the frequency and amplitude of the marker appear both in
the active function block, and in the upper-right corner of the screen.
You can use the knob, the arrow keys, or the softkeys in the Peak
Search menu to move the marker. Pressing
Esc removes the value
from the display.
8. If you have moved the marker, return it to the peak of the 10 MHz
signal.
Changing Reference Level
9. Press AMPLITUDE, and note that reference level (Ref Level) is now
the active function. Press
Marker ➞, Mkr ➞ Ref Lvl.
Note that changing the reference level changes the amplitude value
of the top graticule line.
Figure 3-4 shows the relationship between center frequency and
reference level. The box represents the analyzer display. Changing
the center frequency changes the horizontal placement of the signal
on the display. Changing the reference level changes the vertical
placement of the signal on the display. Increasing the span increases
the frequency range that appears horizontally across the display.
10 MHz Peak