Tektronix 503 User Manual

Calibration— Type 503
22. Check Compression or Expansion—
Horizontal
a. Check that the SENSITIVITY switch is set to .2 VOLTS/
CM.
b. Change the Standard Amplitude Calibrator to .5 V
output.
c. With the VARIABLE control, adjust the dot spacing
for exactly 2 cm, and center the display horizontally and
vertically.
d. With the HORIZONTAL POSITION control, move the
right-hand dot to the 10-cm vertical graticule line.
e. Check—Dot spacing 2 cm ± 1.5 mm.
f. Move the left-hand dot to the left edge (0-cm) of the
graticule.
g. Check— Dot spacing 2 cm ±1.5 mm.
h. Return the VARIABLE control to CALIBRATED.
23. Check Amplifier Balance— Horizontal (DC
Common Mode Rejection)
a. Connect an additional 50-ohm cable to the Standard
Amplitude Calibrator output, using a UHF T adapter, and
a quick-connect adapter on the output end of the cable.
b. Set the HORIZONTAL —INPUT connector to DC, and
connect the cable added in step (a) to the —INPUT con
nector.
c. Change the Standard Amplitude Calibrator output to
5 volts, and the HORIZONTAL SENSITIVITY switch to .2
VOLTS/CM.
d. The display will be two dots spaced horizontally. With
the HORIZONTAL POSITION control, move the display to
the right-hand and then to the left-hand vertical graticule
line.
e. Check—The total horizontal amplitude of the display
should not exceed 2.5 mm anywhere in the graticule area
(CMRR 100:1).
f. Change the Standard Amplitude Calibrator output to
0.5 volts, and the HORIZONTAL SENSITIVITY switch to
1 mV/CM, and repeat step (d).
g. Check—The horizontal amplitude of the display should
not exceed 5gfrT anywhere in the graticule area.
h. Change tfre' HORIZONTAL SENSITIVITY switch to .5
VOLTS/CM, and the Standard Amplitude Calibrator to 50
volts, and repeat step (d).
i. Check—The horizontal amplitude of the display should
not exceed 2 curr anywhere in the graticule area, (50:1
CMRR). c" *
j. Change the HORIZONTAL SENSITIVITY switch to 5
VOLTS/CM and the Calibrator output to 100 volts; repeat
step (d).
k. Check—The horizontal amplitude of the display should
not exceed 4 mm anywhere in the graticule area.
ft
24. Check Compression or Expansion— Vertical
a. Set the Standard Amplitude Calibrator to .5 volts, and
chanqe the HORIZONTAL + and —INPUT switches to
GND.
b. Move the Standard Amplitude Calibrator signal from
the HORIZONTAL -(-INPUT connector to "Hh. VERTICAL
-(-INPUT connector, and change the VERTICAL -(-INPUT
switch to DC.
c. Set the VERTICAL SENSITIVITY switch to .2 VOLTS/
CM.
d. The display should consist of two dots spaced verti
cally. With the VERTICAL VARIABLE control, adjust the dot
spacing for exactly 2 cm, and center the display vertically.
e. Move the display to the top 2 cm of the graticule.
f. Check—Dot spacing 2 cm ± 1.5 mm.
g. Move the display to the bottom 2 cm of the graticule.
h. Check— Dot spacing 2 cm ± 1.5 mm.
i. Return the VARIABLE control to CALIBRATED.
25. Check Amplifier Balance— Vertical
(DC CMRR)
a. Move the Standard Amplitude Calibrator signal from
the HORIZONTAL -INP UT connector to the VERTICAL
— INPUT connector.
b. Change the Calibrator signal to 5 volts, and set the
VERTICAL -IN PU T switch to DC.
c. Change the HORIZONTAL DISPLAY switch to SWEEP
NORMAL (X I), and center the display vertically and hori
zontally. It may be necessary to adjust the INTENSITY con
trol.
d. With the VERTICAL POSITION control, move the dis
play to the top line of the graticule, and then to the bot
tom line of the graticule.
e. Check—Trace separation not to exceed 2.5 mm (CMRR
100:1).
f. Change the VERTICAL SENSITIVITY to 1 mV/CM, and
change the Standard Amplitude Calibrator output to 0.5
volt.
g. Repeat step (d).
h. Check—Trace separation not to exceed 5 cm.
NOTE
A typical display is shown in Fig. 6-14. The trace
separation is indicated at the low-frequency por
tion of the square-wave signal.
i. Change the VERTICAL SENSITIVITY switch to .5 VOLTS/
CM and the Standard Amplitude Calibrator output to 50
Volts.
j. Check—Trace separation not to exceed 2 cm any
where within the graticule area.
k. Change the VERTICAL SENSITIVITY switch to 5 VOLTS/
CM and the Standard Amplitude Calibrator output to 100
Volts.
l. Check—Trace separation not to exceed 4 mm any
where within the graticule area.
©
6-13

Tektronix 503 Specifications

General

Brand	Tektronix
Model	503
Category	Test Equipment
Language	English