162 Chapter2
Making Measurements
Example 13: Making Pulsed RF Measurements
Figure 2-87 Markers Show Pulse Width
Pulse Repetition Frequency (PRF)
Pulse repetition interval (PRI) is the spacing in time between any two
adjacent pulse responses, shown in Figure 2-83. Using the
MARKER 1/DELTA function, PRI can easily be inverted to read PRF
instead.
1. To measure PRI, set the span to 0 Hz and adjust amplitude of the
main lobe to the reference level.
2. Set the amplitude scale to linear and readjust the signal so that it is
on screen.
3. Decrease the sweep time (that is, the sweep becomes faster) until the
display resembles Figure 2-88.
4. Select the single trigger mode by pressing
SGL SWP.
5. Press
PEAK SEARCH, MARKER DELTA, and NEXT PK RIGHT or NEXT
PK LEFT. The difference displayed between the two markers is equal
to the PRI.
6. Press MKR and MARKER 1/DELTA to display the PRF, as shown in
Figure 2-88.
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