Tektronix 475 User Manual

Calibration—475
o. Repeat step 17-h.
18. Adjust CH 1 Position Centering
a. Set the CH 1 VOLTS/DIV switch to 2 mV.
b. Adjust the Standard Amplitude Calibrator for a
50 mV output.
c. CHECK—The top of the CRT display can be
positioned below the center horizontal graticule line, and
that the bottom of the display can be positioned above the
center horizontal graticule line.
d. ADJUST—CH 1 Position Centering adjustment, R176
(see Fig. 5-9), so the top of the CRT display can be
positioned below the center horizontal graticule line, and
the bottom of the display can be positioned above the
center horizontal graticule line.
19. Adjust CH 2 Variable Voits/Division Balance
a. Set the CH 2 VOLTS/DIV switch to 5 mV and the
VERT MODE switch to CH 2.
b. CHECK—That the CH 2 UNCAL light turns on when
the VAR control is out of the detent position.
c. CHECK—CRT display for 2 divisions or less of trace
shift when rotating the CH 2 VAR control through its
range.
d. ADJUST—CH 2 Variable Balance adjustment, R210
(see Fig. 5-10), for minimum trace shift when rotating the
CH 2 VAR control through its range.
Fig. 5-9. Location of CH 1 Position Centering adjustment.
e. Return the CH 2 VAR control to the detent position.
20. Adjust CH 2 Gain Switch Balance
a. Set the CH 2 VO LTS/DIV switch to 2 mV.
b. Position the trace to the center horizontal line.
c. CHECK—CRT display for minimum trace shift
between 2 mV and 5 mV positions of the CH 2 VOLTS/
DIV switch.
d. ADJUST—CH 2 Gain Switch Balance adjustment,
R235 (see Fig. 5-10), for minimum trace shift between
2 mV and 5 mV positions of the CH 2 VOLTS/DIV switch.
21. Check CH 2 INVERT Balance
a. Set the CH 2 AC-GND-DC switch to GND.
b. Position the trace to the center horizontal graticule
line.
c. Push the INVERT pushbutton.
d. CHECK—For less than 1 division of trace shift when
switching from normal to inverted.
e. ADJUST—Invert Balance adjustment, R215 (see
Fig. 5-10), for minimum trace shift between positions of
the INVERT switch.
f. Return the INVERT to the normal (out) position.
J f r " ''
Fig. 5-10. Location of CH 2 Var Volts/Div Balance, Gain Switch
Balance, and Invert Balance adjustments.
®
5-31

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English