Tektronix 453 User Manual

Performance Check/Calibration-Type 453/R453
(A)
(C)· Poor geometry
R982
eometry
Fig.
5-9. (A) Typical CRT display showing good geometry; (8) and ( C) poor geometry; (D) Location of Geometry adjustment (Z Axis Am-
plifier
circuit
board).
c. CHECK-Change the CH 1 VOLTS/DIV switch from
20 mV to 5 mV. Trace should not move vertically.
NOTE
Use the TRACE FINDER switch to locate the trace
if
it is deflected off screen when switching to 10
or 5 mV.
d. ADJUST-Channel 1 STEP ATTEN BAL adjustment, R30
(see Fig. 5-10), for no trace shift as the CH 1 VOLTS/DIV
switch is changed from 20 mV to 5 mV.
e. Set the MODE switch to CH 2.
f. Position the trace to the center horizontal line with
the Channel 2 POSITION control.
g. CHECK-Change the CH 2 VOLTS/DIV switch from
20 mV to 5 mV. Trace should not move vertically.
h. ADJUST-Channel 2 STEP ATTEN BAL adjustment, R130
(see Fig. 5-10), for no trace shift as the CH 2 VOLTS/DIV
switch is changed from 20 mV to 5 mV.
5-12
12. Check/ Adiust Channel 1 and 2 Position 0
Center
a. Connect the precision DC voltmeter between the Chan-
nel 2 position center test point (pin connector 'Z') on the
Vertical Preamp board
(see Fig. 5-11) and chassis ground.
Channel 1
STEP ATTEN BAL
Channel 2
STEP ATTEN BAL
Fig. 5-10. Location of Channel 1 and 2 STEP ATTEN BAL adjust-
ments lfront panel) •
©
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Tektronix 453 Specifications

General

Brand	Tektronix
Model	453
Category	Test Equipment
Language	English