Reference Key; Window Key - HP 54501A Operation Reference

reference Key

window Key

TIME BASE
500
0 CXXX Xl
left8right
on
t imebose
O.O:XX:O
54501/WF09
The Reference key changes the delay reference point to one of the
following:
•
left
•
cntr (center)
•
right
If delay is set to 0, the reference point consists of pre-trigger data to the
left and post-trigger data to the right.
With the \Vindow function turned on an expanded tirnebase is activated
and the oscilloscope is placed in a multiple screen mode. The normal
waveform, in the original timebase setting, is displayed in the top screen
with markers, vertical dotted lines, that enclose a portion ofthe displayed
waveform; Only the enclosed portion, between the markers; is displayed in
the bottom screen.
The displayed timebase infam.ati a n under the wavefann display
area is windowed tirnebase infonnation. lY71en the window is on
all measurement results and injonnation are windowed
infam.atian.
This feature is much the same
oscilloscope, however, with the dual screen activated you
portion of the normal waveform you are viewing.
The timebase of the windowed waveform can be varied from equal to the
1/20 of the normal timebase. This equates to 1/2 of a
normal timebase to
major division.
Note
as
the delayed sweep on an analog
can
see what
Timebase
4-3