Tektronix 543B Instruction Manual page 35

Ajust triggering controls for a stable square wave, dis­
mayed vertical. Adjust C310 (see Fig. 5-2) for an optimum
sc.are-wave presentation.
control to 50 VOLTS, the EXTERNAL HORIZONTAL VOLTS/
CM to 10 ana adjust C313 for an optimum square-wave
oressntation.
Set the oscilloscope and plug-in controls as described in
"able 5-4 before proceeding with step 25.
TABLE 5-4
Crt Controls
INTENSITY
FOCUS
ASTIGMATISM
SCALE ILLUM
Time Base
TRIGGERING LEVEL
STABILITY
TRIGGERING MODE
TRIGGER SLOPE
VARIABLE (TIME/CM)
TIME/CM
HORIZONTAL DISPLAY
SINGLE SWEEP
Other Controls
HORIZONTAL DISPLAY
VERNIER (HORIZONTAL
POSITION)
EXTERNAL HORIZONTAL
V OLTS/CM
VARIABLE (EXTERNAL
HORIZONTAL VOLTS/
CM)
AMPLITUDE CALIBRATOR
TU-7
Vertical Position
Test Function
Amplitude
Repetition Rate
Other Controls
25. Vertical Amplifier High-Frequency Adjustments
Use the triggering controls to obtain a stable display.
While observing the top of the displayed signal, adjust R502
(DC SHIFT) for minimum tilt.
Set AMPLITUDE CALIBRATOR
Usable level
As is
As is
As is
0
Clockwise
AC
+ INT
CALIBRATED
.5 mSEC
NORMAL ( X I)
NORMAL SWEEP
Midrange
Midrange
10
CALIBRATED
OFF
Centered
-i-Pulse
Adjust for 6 cm of signal
Low
As is
Calibration — Type 543B/RM543B
Fig. 5-5. Location o f inte rnal adjustments fo r the vertical input.
Set the Repetition Rate to High and the TIME/CM control
to .1 p-SEC. Adjust L588, L589, L598, L599, C520 and R580
for minimum rolloff or overshoot on the front corner of the
waveform. When making these adjustments be careful that
the front corner remains level with the remainder of the
waveform.
Set the TIME/CM control to 2 ,«SEC and adjust L560 for
minimum tilt on the waveform.
Set the TIME/CM control to .2 p.SEC and adjust L554 and
C581 for minimum rolloff or overshoot on the front corner
Fig. 5-6. Location o f inte rnal adjustments fo r the vertical output
am plifier.
5-9