Tektronix TDS6404, Service Manual, Page: 68 / 252

Brief Procedures
4- 12
TDS6000 Series Service Manual
H
One period of the square-wave probe-compensation signal is about five
horizontal divisions on-screen for the 200
s/div horizontal scale setting.
H
Rotating the horizontal
SCALE
knob clockwise expands the waveform
on the screen (more horizontal divisions per waveform period),
counterclockwise rotation contracts it, and returning the horizontal scale
to 200
s/div returns the period to about five divisions.
H
The horizontal POSITION knob positions the signal left and right on
the screen when rotated.
8. Verify horizontal delay:
a. Center a rising edge on screen:
H
Set the horizontal POSITION knob so that the rising edge where the
waveform is triggered is lined up with the center horizontal
graticule.
H
Change the horizontal SCALE to 20 s/div . The rising edge of the
waveform should remain near the center graticule and the falling
edge should be off screen.
b. Turn on and set horizontal delay:
H
Pull down the Horiz/Acq menu to select Horizontal/Acquisition
Setup. . .
.
H
Click the Horizontal tab in the control window that displays.
H
Click the
Delay Mode
button to turn delay on.
H
Double click the Horiz Delay control in the control window to
display the pop-up keypad. Click the keypad buttons to set the
horizontal delay to
500 s , and then click the ENTER key.
c. Verify the waveform: Verify that a falling edge of the waveform is within
a few divisions of center screen.
d. Adjust the horizontal delay: Rotate the upper multipurpose knob to
change the horizontal delay setting. Verify that the falling edge shifts
horizontally. Rotate the front-panel horizontal
POSITION knob. Verify
that this knob has the same effect (it also adjusts delay, but only when
delay mode is on).
e. Verify the delay toggle function:
H
Rotate the front-panel horizontal POSITION knob to center the
falling edge horizontally on the screen.