Performance
Check/Calibration-Type
453/R453
g. Change the following control setting:
A and B
TIME/DIV
A
SWEEP
MODE
HORIZ
DISPLAY
.1
ms
AUTO
TRIG
DELAYED
SWEEP
(B)
h.
Set the low-frequency generator for a 0.2-division
dis-
play
at
30 kilohertz
(as
set
in
part a of
this
step).
i.
CHECK-Stable
CRT
display
(see
Fig.
5-26)
can be
obtained
with
the B
LEVEL
control.
j.
Without changing the output amplitude, set the
low-
frequency generator to
60
hertz.
k.
Set the A and B
TIME/DIV
switch to 2
ms.
I.
CHECK-Stable
CRT
display cannot be obtained
at
any setting of the B
LEVEL
control.
37.
Check Single Sweep Operation
a. Change the following control settings:
COUPLING
(A
and
B)
AC
A and B
TIME/DIV
5
ms
HORIZ
DISPLAY
A
:b.
Set the low-frequency generator for a five-division
display
at
one kilohertz.
c.
Set the A
LEVEL
control
fully
clockwise.
d. Set the A
SWEEP
MODE
switch to
SINGLE
SWEEP.
e.
Push
the
RESET
button.
f.
CHECK-RESET
light
must
come
on
when button
is
pressed and remain
on
until
sweep
is
triggered.
g. Slowly rotate the A
LEVEL
control counterclockwise.
h.
CHECK-A single-sweep display
(one
sweep
only)
is
presented when the A
LEVEL
control
is
in
the triggerable
region.
RESET
light
must
go off
at
the end of the sweep
and remain
off
until
the
RESET
button
is
pressed again.
38.
Check A
and
B Slope Switch Operation
a. Change the following control settings:
A
LEVEL
0
A
SWEEP
MODE
NORM
TRIG
b. Set the low-frequency generator for a four-division
display
at
one kilohertz.
c.
CHECK-CRT display starts
on
the positive slope of
the waveform (see
Fig.
5-27
A).
d.
Set the A
SLOPE
switch to
-.
e. CHECK-CRT display starts
on
the negative slope
of
the waveform
(see
Fig.
5-278).
5-28
(AJ
(8)
Fig.
5-27.
Typical
CRT
display
when
checking
slope
switch
operation.
f.
Set the A
SWEEP
MODE
switch to
AUTO
TRIG.
g.
Set the
HORIZ
DISPLAY
switch to
DELAYED
SWEEP
(B).
h.
CHECK-CRT display starts
on
the positive slope of
the waveform
(see
Fig.
5-27
A).
i.
Set the B
SLOPE
switch to
-.
j.
CHECK-CRT display starts
on
the negative slope of
the waveform
(see
Fig.
5-278).
k.
Disconnect all test equipment.
39. Check A
and
B
Level
Control Range
a. Connect the low-frequency generator to the B
EXT
TRIG
INPUT
connector through a 42-inch
BNC
cable and
the
BNC
T connector. Connect the output of the
BNC
T
connector to the Channel 1
INPUT
connector through an
18-inch
BNC
cable.
b.
Change the following control settings:
CH
1
VOLTS/DIV
COUPLING
(A
and
B)
LEVEL
(A
and
B)
B
SOURCE
DC
Midrange
EXT
c.
Set the low-frequency generator for a four-division
display
(four
volts peak to peak)
at
one kilohertz.
©
To Next Page
Loading...
