Tektronix 434, Instruction Manual

Page: 101 / 222

h. Press the RESET b u tto n .
i. C H E C K —The R E A D Y lig h t comes on and remains on
u n til the sweep is triggered.
j . R o ta te the T R IG G E R L E V E L c o n tro l through
midrange.
k. C H E C K —A single-sweep display (one sweep o n ly) is
presented and the R E A D Y lig h t goes o u t.
32. Check T R IG G E R L E V E L C ontrol Range
a. Set the Sweep MODE to A U T O , T R IG G E R COUP­
L IN G to DC, T R IG G E R SOURCE to E X T , and the CH 1
V O L T S /D IV sw itch to 1 V .
b. A d ju s t the signal generator fo r a 4-division display o f
a 1 k ilo h e rtz signal.
c. C H E C K —R otate the T R IG G E R L E V E L co n tro l
th ro u g h o u t its range and check th a t the display can be
triggered (stable display) at any p o in t along the slope o f the
w aveform in both the + and — positions o f the T R IG G E R
SLOPE sw itch. This indicates a c o n tro l range o f at le a s t+2
volts to —2 volts.
d. Set the E X T A T T E N p u sh b u tto n to 1 :1 0 and the CH
1 V O L T S /D IV sw itch to 10 V.
e. A d ju s t the signal generator fo r a 4-division display o f
a 1 k ilo h e rtz signal.
Calibration—434
f , C H E C K —R otate the T R IG G E R L E V E L co n tro l
th ro u g h o u t its range and check th a t the display can be
triggered (stable display) at any p o in t along the slope o f the
w aveform in both the + and — positions o f the T R IG G E R
SLOPE sw itch. This indicates a c o n tro l range o f at least +20
vo lts to —20 volts.
g. D isconnect all test equipm ent.
33. Check Line Triggering
a. C onnect a 10X probe (432 standard accessory) to the
CH 1 in p u t connector.
b. Set the T R IG G E R SOURCE to L IN E , the T R IG G E R
C O U P LIN G to AC , and the CH 1 V O L T S /D IV sw itch to 10
V.
c. C onnect the probe tip to the same line-voltage souce
w hich is connected to the in stru m e n t.
d. A d ju s t the T R IG G E R L E V E L co n tro l fo r a stable
display.
e. C H E C K —Stable CRT display triggered on the co rre ct
slope in b o th the + and — positions o f the T R IG G E R
SLOPE sw itch.
f. D isconnect all test equipm ent.
NOTES
5-23