Agilent Technologies 89410A Operator's Manual page 49

4.
Turn on a second trace and configure it to display stable time data:
Press [ ], [
Display 2 grids
Press [ ], [
Trigger trigger type
Press [ ].
B
Press [
Measurement Data
([ ] for a 2-channel analyzer).
main time ch1
Press [ ].
Auto Scale
5.
Set up a gate to encompass the first burst:
Press [ ], [
Time gate on
Pre ss [ ] to turn on the Entry LED.
Marker|Entry
Rotate the knob to align the left gate marker with the beginning of the
first burst.
Press [ ]
gate length
Rotate the knob to align the right gate marker with the end of the first
burst.
6.
Turn off the grids to highlight the gate markers:
Press [ ], [
Display more display setup
The display should now appear as below.
The lower trace displays the time domain signal with a gate
encompassing the first burst. The upper trace displays the
frequency spectrum of the gated burst.
].
], [ ].
internal source
], [ ]
main time
], [ ].
ch1 gate dly
], [
grids off]
Making On/Off Ratio Measurements
4 - 3