52 Chapter 2
Basic Operation
Configuring the RF Output
Figure 2-4 Bandpass Filter Response on 8757D
Using Markers
1. Press
Markers.
This opens a table editor and associated marker control softkeys. You can use up to 10 different
markers, labeled 0 through 9.
2. Press
Marker Freq and select a frequency value within the range of your sweep.
In the table editor, notice how the state for marker 0 automatically turns on. The marker also
appears on the 8757D display.
3. Use the arrow keys to move the cursor in the table editor to marker 1 and select a frequency
value within the range of your sweep, but different from marker 0.
Notice that marker 1 is activated and is the currently selected marker, indicated by the marker
arrow pointing down. As you switch between markers, using the arrow keys, you will notice that
the selected marker’s arrow points down, while all others point up.
Notice also that the frequency and amplitude data for the currently selected marker is displayed
on the 8757D.
4. Move the cursor back to marker 0 and press
Delta Ref Set > Marker Delta Off On to On.
In the table editor, notice that the frequency values for each marker are now relative to marker 0.
Ref appears in the far right column (also labeled Ref) to indicate which marker is the reference.
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