Tektronix 543B, Инструкция по эксплуатации

Страница: 35 / 90

Calibration — Type 543B/RM543B
Adjust triggering controls for to stable square wave, dis-
played vertical. Adjust C310 (see Fig. 5-2) for an optimum
square-wave presentation. Set AMPLITUDE CALIBRATOR
control to 50 VOLTS, the EXTERNAL HORIZONTAL VOLTS/
CM to 10 and adjust C313 for an optimum square-wave
presentation.
Set the oscilloscope and plug-in controls as described in
Table 5-4 before proceeding with step 25.
TABLE 5-4
Crt Controls
INTENSITY
FOCUS
ASTIGMATISM
SCALE ILLUM
Time
TRIGGERING LEVEL
STABILITY
TRIGGERING MODE
TRIGGER SLOPE
VARIABLE (TIME/CM)
TIME/CM
HORIZONTAL DISPLAY
SINGLE SWEEP
Usable level
As is
As is
As is
Base
0
Clockwise
AC
+ INT
CALIBRATED
.5 mSEC
NORMAL (X1 )
NORMAL SWEEP
Other Controls
HORIZONTAL DISPLAY
VERNIER (HORIZONTAL
POSITION)
EXTERNAL HORIZONTAL
VOLTS/CM
VARIABLE (EXTERNAL
HORIZONTAL VOLTS/
CM)
AMPLITUDE CALIBRATOR
Midrange
Midrange
10
CALIBRATED
OFF
Vertical Position
Test Function
Amplitude
Repetition Rate
Other Controls
TU-7
Centered
+ Pulse
Adjust for 6 cm of signal
Low
As is
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.
Fig. 5-5. Location of internal adjustments for the vertical input.
Set the Repetition Rate to High and the TIME/CM control
to .1 µSEC. 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 μSEC and adjust L560 for
minimum tilt on the waveform.
Set the TIME/CM control to .2 μSEC and adjust L554 and
C581 for minimum rolloff or overshoot on the front corner
1589
R580
C581
R52O R502
Fig. 5-6. Location of internal adjustments for the vertical output
amplifier.