Tektronix 434, Инструкция по эксплуатации

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Calibration—434
k. A D J U S T — C 953 (see Fig. 5-5) fo r o p tim u m w aveform
risetim e and fla t to p .
a. Set the Sweep M ODE to S IN G LE SWEEP.
1. D isconnect all test equipm ent.
b. C onnect the m inus lead o f a DC v o ltm e te r to test
p o in t TP 1236 and the plus lead o f the m eter to test p o in t
T P 1294. See Fig. 5-6 fo r test p o in t locations.
6. A djust Focus Range and Astigm atism
a. C onnect the PROBE C A L 0.6 V 1 kHz signal to the
CH 1 in p u t connector.
c. A d ju s t R 1293 (C E-1, see Fig. 5-6) fo r a m eter reading
o f 100 volts.
b. A d ju s t the T R IG G E R L E V E L c o n tro l fo r a stable
display and advance the IN T E N S IT Y co n tro l to a c o m fo rt­
able viewing level.
d. Move the plus lead o f the m eter to test p o in t TP1296
(see Fig. 5-6).
c. C H E C K —C RT display fo r o p tim u m focus o f b o th the
h o rizo n ta l and vertical p o rtio n s of the square wave. The
e. A d ju s t R1295 (CE-2) fo r a meter reading of 100
volts.
display should remain in focus as the setting o f the
IN T E N S IT Y c o n tro l is varied.
f. Move the plus lead o f the m eter to test p o in t TP 1235.
d. A D J U S T —Focus Range adjust R968 (see Fig. 5-5)
and A S T IG adjust R85 (located on rear panel) fo r o p tim u m
focus o f b o th the h o rizo n ta l and vertical p o rtio n s o f the
g. A d ju s t Upper Non-Store Level R 1224 fo r a meter
reading o f 90 volts.
display.
h. Set the UPPER SCREEN STORE b u tto n to the
STO RE (b u tto n in) p o sitio n .
e. D isconnect the PROBE C A L 0.6 V 1 kH z signal fro m
the CH 1 in p u t connector.
7. A djust Trace R otation
i. A d ju s t U pper Store Level adjustm ent R 1226 fo r a
m eter reading o f 180 volts.
a. P osition the free-running trace to the center h o ri­
zontal graticule line.
j. Set the UPPER SCREEN STORE b u tto n to non-store
(b u tto n ou t) p o sitio n and move the plus lead o f the meter
to test p o in t TP1285 (see Fig. 5-6).
b. C H E C K —The trace should be parallel w ith the center
h o rizo n ta l line.
k. A d ju s t Low er N on-Store Level R 1274 fo r a m eter
reading o f 90 volts.
c . A D J U S T - T R A C E R O T A T IO N adjustm ent R80
(located on rear panel) so the trace is parallel w ith the
h o rizo n ta l graticule lines.
1. Set the LOWER SCREEN STORE b u tto n to the
STORE (b u tto n in) p o sitio n.
8. Pre-Set C o llim atio n and Storage Target Levels
N O T E
m. A d ju s t Low er Store Level R 1276 fo r a m eter reading
o f 180 volts.
I f C R T storage perform ance has been sa tisfa cto ry, no
a d ju stm e n t o f the storage c irc u itry is necessary.
9. A djust Upper and Lower Non-Store Levels
Proceed w ith step 13. I f i t is desired to touch up
storage c a lib ra tio n to im prove o peration o f an in s tru ­
m e n t, proceed w ith step 9. I f this c a lib ra tio n
procedure is being p e rfo rm e d on an in s tru m e n t
a. Set the Sweep M O DE to A U T O and the UPPER
SCREEN STORE to STO RE (b u tto n in).
having u n k n o w n storage c irc u itry c a lib ra tio n (such as
a fte r replacing a C R T), c o n tin u e w ith step 8.
b. A d ju s t the IN T E N S IT Y c o n tro l fo r a m oderately
b rig h t trace.
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