To Use Delayed Sweep - HP 54616B User And Service Manual

Using Option 005 Enhanced TV/Video Trigger

To use delayed sweep

To use delayed sweep
Delayed sweep is a magnified portion of the main sweep. You can use
delayed sweep to locate and horizontally expand part of the main sweep for a
more detailed (high resolution) analysis of signals, for example multi-burst
frequencies. The following steps show you how to use delayed sweep.
Notice that the steps are very similar to operating the delayed sweep in
analog oscilloscopes.
Connect a signal to the oscilloscope and obtain a stable display.
1
Press
2
Main/Delayed
Press the Delayed softkey.
3
The screen divides in half. The top half displays the main sweep, and the
bottom half displays an expanded portion of the main sweep. This expanded
portion of the main sweep is called the delayed sweep. The top half also has
two solid vertical lines called markers. These markers show what portion of
the main sweep is expanded in the lower half. The size and position of the
delayed sweep are controlled by the Time/Div and Delay knobs. The
Time/Div next to the
value is displayed for a short time at the bottom of the display.
•
To display the delay value of the delayed time base, either
press
Main/Delayed
•
To change the main sweep Time/Div, you must turn off the delayed sweep.
Since both the main and delayed sweeps are displayed, there are half as
many vertical divisions so the vertical scaling is doubled. Notice the changes
in the status line.
•
To display the delay time of the delayed sweep, either press
Main/Delayed
displayed near the bottom of the screen.
If the TV graticule is selected, notice that it is presented in both main and
delayed sweeps. For more information on delayed sweep operation, refer to
"To use delayed sweep" in Chapter 2.
Automatic measurements are controlled by the delayed sweep shown in the
following two figures.
3–14
.
symbol is the delayed sweep sec/div. The delay
or turn the Delay knob.
or turn the delay knob. The delay value is