Tektronix VM Series User Manual

Measuring Waveforms
3- 126
TDS5000 Series User Manual
First point in record
Delay
Trigger point of
cursor source
Horizontal divisions
× sec/div
+
Cursor
Cursor readout (tn) =
Horizontal reference = 0%
Figure 3- 35: Components deter mining Time cursor readout values
Note that a vertical cursor readout includes and varies directly with the Delay
time, which varies directly with the horizontal position set for the timebase. To
see the amount of time to the first point, set horizontal delay to 0.0 and set the
horizontal reference point to 0%. Now the horizontal position readout shows the
time following the first point, and adding this value to the cursor readout yields
the cursor position on screen relative to first point. (You can find the horizontal
readout both in the control window and in the readout at the bottom of the
screen.) The following relationships hold:
Time from First Point = Horiz. Position (when Horiz. Delay and Ref Position are
zero)
T1 readout = Time to First Point + Additional Time to Cursor
Cursor Units Depend on Sources. A cursor that measures amplitude or time will
read out in the units of its source as indicated in Table 3--9. Note mixed sources
require delta cursor readouts to use the units of the Cursor 1 source.
Table 3- 9: Cursor units
Cursors Standard units
1
Readout names
Horizontal volts, watts
V1, V2, ∆V
Vertical seconds, bits
T1, Τ2, ∆T, F, ∆F
Paired, Split volts, watts, seconds, bits
V1, V2, ∆V, T1, T2, ∆T
1
If the V1 and V2 units do not match, the ∆V readout defaults to the units used by the
V1 readout.

Tektronix VM Series Specifications

General

Brand	Tektronix
Model	VM Series
Category	Test Equipment
Language	English