Rise Time . 20.0; Time Difference Between Two Pulses On Two Time-Related Signals - Tektronix 9235A Instruction Manual

Operating Instructions — 2235A Instruction
7. Select the B Horizontal MODE. Adjust the B DELAY Substituting the given values in the time difference
TIME POSITION control until the display intersects formula:
the 10% point at the center vertical graticule line
(see Figure 2-23, Point A). Rise Time = (7.50 - 2.50)(1 ps/div) = 5 ps
8. Record the B DELAY TIME POSITION contro! dial
setting. Time Difference Between Two Pulses on Two
Time-Related Signals
9. Adjust the B DELAY TIME POSITION control until the : ; :
display intersects the 90% point at the center verti- 1. Preset instrument controls and obtain a baseline
cal graticule line (see Figure 2-23, Point B). trace, Set the A & B SOURCE switch to CH 1 and the
Vertical MODE switches to BOTH and ALT.
2. Using probes or cables having equal time delays,
apply the reference signal to the Channel 1 input and
apply the comparison signal to the Channel 2 input.
3. Set the appropriate VOLTS/DIV switch to produce a
display of approximately 2 or 3 divisions in
amplitude.
Set the A SEC/DIV switch to display the measure-
ment points of interest within the graticule area.
5. Select ALT Horizontal MODE and CH 1 Vertical
MODE. Adjust both the Channel 1 POSITION control
and the A/B SWP SEP control so that the A trace is
displayed above the B trace.
xr
O S
the intensified zone to the appropriate edge of the
until the edge of the reference signal (on the B trace)
@) is centered at any convenient vertical graticule line
(see Figure 2-24, Part A).
Figure 2-23. Rise time, differential time method. 8. Select CH 2 Vertical MODE and adjust both the
10. Record the B DELAY TIME POSITION control dial the B trace.
setting.
9, Rotate the B DELAY TIME POSITION control to move
ment procedure.
2-24