Tektronix CSA7404B, Service Manual

Page: 88 / 348

Brief Procedures
4- 12
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
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
1 m s and then click the ENTER key.
c. Verify the waveform: Verify that a rising 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 rising 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.
H
Change the horizontal SCALE to 40 ns/div . The rising edge of the
waveform should remain near the center graticule.
H
Readjust the delay setting to position the rising edge 2 divisions to
the right of the center graticule line.
H
Push the front-panel DELAY button several times to toggle delay off
and on and back off again. Verify that the display switches quickly
between two different points in time (the rising edge shifts horizon-
tally on the display).
9. Remove the test hookup: Disconnect the BNC cable from the channel input
and the probe compensation output.
Equipment
required One BNC cable, such as Tektronix part number 012-0076-00
One TCA-BNC adapter
Prerequisites None
1.
Initialize the instrument: Push the front-panel
DEFAULT SETUP
button.
2.
Hook up the signal source:
Connect the BNC cable from the probe com-
pensation output to the CH 1 input through a TCA-BNC adapter as shown in
Figure 4--5.
Verify the A (Main) and B
(Delayed) Trigger Systems