HP 8590 E-Series User Manual page 100

Once gate delay or gate length are activated, use the knob and data entry keys can be used
to position the two vertical gate markers. Select a time interval within the last half of the
pulse is selected.
11. Turn the gate on by pressing GATE ON OFF so that ON is underlined. This activates the
frequency domain window, which is the lower window. The spectrum selected with
the current gate position can now be viewed in the frequency domain window. Press
Main Menu.
12. The resolution bandwidth, video bandwidth, and sweep time are not optimized, so the
frequency display may not look correct. There may be signal dropouts or poor frequency
resolution. This can be corrected by entering the pulse parameters and turning on the
coupling.
The gate utility can optimize the setting of resolution bandwidth if the user enters the
value of the pulse width and turns on the coupling. The video bandwidth will be optimized
if the gate length is entered and coupled. The sweep time is optimized when the pulse
repetition interval is entered and coupled.
Press Define Coupling .
activates the time domain window and turns off the time gate.) If pulse parameters have
previously been entered, the values will be displayed.
parameters. These parameter entry tools allow pulse parameters to be entered using a
marker or through the keypad. Press Previous Menu to return to the coupling menu.
CPL VBW ON OFF (ON), and CPL SWP ON OFF (ON) to turn on the video bandwidth and
sweep time coupling.
frequency window instead of the time domain window. (If the gate was not on when
the user left the frequency window, it may be necessary to press Define Gate and
GATE ON OFF (ON) to turn the gate on again.)
Note
another front panel key), press the
utility menu used.
Then press Pulse Param to enter the pulse parameters. (This
key twice to return to the last gate
Making Measurements 4.21