Tektronix 434, Instruction Manual, Page: 93 / 222

C a lib ra tio n —434
e. Set the CH 2 V O L T S /D IV sw itch to 10 m V .
f. R otate the CH 2 Variable V O L T S /D IV c o n tro l.
g. C H E C K —C R T display fo r n o t more than 0.2 division
o f trace s h ift w hen ro ta tin g the CH 2 Variable V O L T S /D IV
c o n tro l.
h. A D J U S T —Variable Balance adjust R312 (see Fig.
5-7) fo r m in im u m trace s h ift w hen ro ta tin g the CH 2
Variable V O L T S /D IV c o n tro l.
i. Set the CH 2 V O L T S /D IV sw itch to 10 m V and the
CH 2 V ariable V O L T S /D IV c o n tro l to C A L .
j. P osition the free-running trace to the center h o ri­
zontal graticule line.
k. Set the IN V E R T sw itch to the IN V E R T position
(b u tto n o u t).
I. C H E C K —CRT display fo r n o t more than 0.2 division
o f trace s h ift w hen in ve rtin g the Channel 2 display.
m. A D J U S T —In v e rt Balance adjustm ent R 348 (see Fig.
5-7) fo r m in im u m trace s h ift when inverting the Channel 2
display.
n. Push the IN V E R T b u tto n in.
19. A d ju st CH 1 and CH 2 G A IN
a. Set in p u t co upling fo r both channels to DC.
b. C onnect the o u tp u t o f the Standard A m p litu d e C ali­
b ra to r to the CH 2 in p u t connector via a 42-inch BNC
cable.
c. Set the Standard A m p litu d e C a lib ra to r fo r a 50 m illi­
v o lt signal o u tp u t am p litu d e .
d. C H E C K —CRT display fo r 5 divisions, ± 0 .1 5 division
o f d e fle ctio n .
e. A D J U S T —CH 2 G A IN adjustm ent (located on fr o n t
panel) fo r e xa ctly 5 divisions o f d e fle c tio n .
f. Change V ertical Mode to CH 1.
g. Remove the Standard A m p litu d e C a lib ra to r signal
fro m the CH 2 in p u t connector and connect it to the CH 1
in p u t connector.
h. C H E C K —CRT display fo r 5 divisions, ± 0 .15 division
o f d e fle ctio n .
i. A D J U S T —CH 1 G A IN adjustm ent (located on fro n t
panel) fo r e xa ctly 5 divisions o f d e fle ctio n .
20. Check CH 1 Variable V O L T S /D IV Range and
A tte n u a to r Accuracy
a. W ith exactly a 5-division a m plitude display, rotate
the CH 1 Variable V O L T S /D IV c o n tro l.
b. C H E C K —CRT display can be reduced in a m p litu d e to
tw o divisions or less.
c. Set the CH 1 V ariable V O L T S /D IV c o n tro l to C A L.
d. C H E C K —Using the CH 1 V O L T S /D IV sw itch and the
Standard A m p litu d e C a lib ra to r settings given in Table 5-1,
check to see if the vertical d e fle ctio n fa c to r accuracy fo r
each p o sitio n o f the CH 1 V O L T S /D IV sw itch is w ith in 3%.
T A B L E 5-1
V e rtica l D e fle c tio n A ccuracy
V O L T S /D IV
Sw itch
Setting
Standard
A m p litu d e
C alib ra to r
O u tp u t
V e rtica l
D efle ctio n
in
Divisions
M axim um
E rro r
For +3%
Accuracy
1 m V 5 m illiv o lts
5
± 0 .15 division
2 m V 10 m illiv o lts
5
± 0 .1 5 division
5 m V 20 m illiv o lts
4 ±0.12 division
10 m V 50 m illiv o lts 5 Previously set
in step 19.
20 m V 0.1 v o lt 5 ± 0 .15 division
50 m V 0.2 v o lt 4 ±0.12 division
.1 V 0.5 v o lt 5 ± 0 .15 division
.2 V 1 v o lt 5 ± 0 .15 division
.5 V 2 volts
4 ±0.12 division
1 V 5 volts 5 ± 0 .15 division
2 V 10 volts 5 ± 0 .15 division
5 V 20 volts 4
± 0.12 division
10 V 50 volts 5 ±0.15 division
5-15