Tektronix SC 502, Instruction Manual

Page: 48 / 127

c. Check-that the positive
and
negative peaks of the
waveform can b.e
positioned to
the
center
graticule l i ne .
d.
Rotate the
verti cal POSITI ON control to mi drange.
e. S
e
t the M O D E switch to CH 2 and the source to
CH 2. Recon nect the generator to the CH 2 i nput connec­
tor and repeat parts
b
through d.
f. Disconnect
cable
and return t he front-panel
controls
to the prelimi nary setti ngs.
9. Check CH 1 and CH 2 Operation
SECO N D S/ D I V 1 m
a.
Adj ust
t he TRIGGERING LEVEL
control
for
a
vi si ble
trace.
b. Check-for
one
trace affected by
CH
1 front-panel
control s.
c. Set
the M O D E switch
to CH 2.
d.
C heck-for
one trace affected by CH 2 front-panel
control s.
e .
Return the front-panel
controls
to the prel i m i nary
setti ngs .
1 0. Check Alternate Operation
S ECON D S/ D I V 5 m
MODE ALT
a.
Check-for two t r a c e s on t he screen.
b.
Adjust
CH 1 and
CH 2 vertical POSITION
controls
for
approximately one
major
divi sion separation between
traces.
c.
Check-that
the sweep alternates between
CH
1
and CH
2 traces
for each S ECONDS/D IV
s
e t t i n g from 5
m
through
. 5.
d. Return t he trant-panel control s t o the prelimi nary
settings.
R EV F APR 1 980
Calibration Procedure-SC 502
Performance Check
1 1 . Check Chopped Operati on
SECO N DS/ D I V
5
m
MOD E CHO P
a.
Check-that two traces
move
across
the screen
sim u ltaneously for
each S ECO N D S/DI V setti ng
trom 5
m
through
.5.
b.
Return the front-panel controls to the prel i m i n ary
setti ngs.
12. Check 1-2 Operation
DISPLAY 1 -2
a. Check-that
one
trace is vi si ble on t he screen and
that the CH 1 and CH
2
vertical POS I TI O N contro l s
m ove
the trace e qu
a l
l
y in
oPPosite
di recti ons.
b. Return the front-panel c o n t
r
o
l s
to the prel i m i nary
setti ngs .
1 3.
Check the Calibrated
Sweep Range (+1 5° C
to
+35°
C)
VO LTS/ D I V
(CH
1
and
CH 2)
DC-GND-AC
SECONDS/DI V
.
5
DC
.1
m
a. Connect . 1 m time marks from the
tim e--mark
generator
through
a
50 0 coaxial
cabl e. with a 50 0
termi nati on, to the
CH
1 i nput
connector.
b.
Rotate
t he TRI G G ERI NG LEVEL control for a stable
displ ay. Vertically position the di spl ay to t he center of t he
crt viewi ng
area.
c. Check-that one time marker per graticule division
is displayed on t h e crt wit h i n
the
accuracy tolerance listed
in Tabl e
4-3.
d.
Disconnect
al l cables.
NO TE
When checking the sweep accuracy at an ambient
temperature range of 00 C to +500 C. derate the
accuracy by an additional 1 %.
4·5