Tektronix WFM8200 User Manual page 60

Display Information
Measure Pop-Up Menu
44
Vertical Offset: The timing difference between the reference and input signal.
Horizontal Offset: The timing difference between the reference and input
signal.
Relative to: Indicates the chosen zero point for the timing display.
Link B to Link A: Indicates the timing relationship between links of a Dual
Link signal.
1
More complex timing relationships display multiple circles. See Timing Displays for Simple Versus Complex
Timing. (See page 45.)
2
Rear Panel is the default setting, where offset is shown as zero when the input and reference are at the same
timing at the rear panel of the instrument. If you select Saved Offset, you can save the timing from one signal, and
then display the timing relative to that saved offset.
The Measure pop-up menu enables you to save a timing setting for comparison
with another signal and specify the zero point of the timing display.
To save the timing of the current input as an offset to the timing display, use the
Save Offset menu entry. The current timing becomes the zero point for the saved
offset mode of the timing display. This applies to both the cross-hair target in the
middle of the display and the numeric readouts.
NOTE.
You cannot save the timing offset if either the input or reference is missing
or unlocked. You also cannot save a reference when in internal mode. Saving an
offset in these conditions would lead to misleading results so it is not allowed
by the instrument. A warning message appears on the screen if you attempt to
save the offset when it is not allowed.
Save Offset allows you to measure the timing between inputs or to match multiple
signals. To select the definition for the zero timing offset, use the Relative To:
menu entry to select one of the following:
Rear Panel, which means the timing offset is shown as zero when the two
signals are timed down at the rear of the instrument.
Saved Offset, which means that the timing is shown as zero offset when the
input signal matches the timing of the signal that was present when the offset
was saved using the Save Offset menu entry.
This selection changes both the numeric readouts and the target in the middle
of the timing display.
WFM8200 and WFM8300 Waveform Monitors
2