HP 54540 Series - Page 190

Math/FFT Menu
Displaying Functions
12 Set the search level to -15 dBm.
The search level sets a threshold for peak detection. All peaks below the
search level are ignored during peak search. The first peak from the left side
of the display that is above the search level is considered by the oscilloscope
as peak number one.
13 Select the peak search softkey. Then, use the entry knob to slowly
move marker 2 to peak number 6.
You may notice that as you select each peak, marker 2 snaps to the next peak
above the search level. Depending on the setup of your oscilloscope and the
signal you are using, somewhere around peak number 4 the search level will
be above the peak. When the oscilloscope cannot find any additional peaks,
the message "marker 2 peak not found" is displayed, and marker 2 snaps to
the right edge of the display.
Figure 10-8 4p running - horiz magnify
Lot Peeoreee
- freq span —
- *# of points —4
=35 000
dBm
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delts
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10-23