USER'S
CALIBRATION
General
The
following
procedure provides calibration infor-
mation
for
external adjustments
of
the 454A.
See
the com-
plete Instruction Manual
for
detailed calibration instruc-
tions.
Astigm~tism
Obtain a display
of
the calibrator waveform.
Adjust
ASTIG in conjunction
with
the FOCUS control for the best
definition
of
the square-wave display.
Trace Rotation
Obtain a free-running trace. Adjust TRACE
ROTATION
so
the trace aligns
with
the horizontal lines
of
the graticu
Ie.
Vertical Gain
Connect the 1
volt
calibrator
signal
to
the
input
connec-
tor
o.f
either vertical
input
channel. Set the vertical MODE
switch
to
display
that
channel and set
that
channel's deflec-
tion factor
to
.2 V/div. Adjust the front-panel
GAIN
adjust-
ment
of
the channel
for
exactly 5 divisions
of
deflection.
The best measurement accuracy when using probes
is
provided
if
the
GAIN
adjustment
is
made
with
the probes
installed.
®
454A
Step Attenuator Balance
Set both
Input
Coupling switches
to
GI\JD
and obtain a
free-running alternate dual-trace display.
Adjust
the STEP
ATTEN
BAL
control
in
each
input
channel
for
no trace
shift
when switching the appropriate attenuator switch
be-
tween the 2
mV
/div
and 10
mV
/div positions.
X Gain
(X-Y
Operation)
Set the
HORIZ
DISPLAY
switch
to
X-V and the
INT
TRIGGER switch
to
CH
1
ONLY.
Set the
CH
1 attenuator
switch
to
.2
V
/div
and the
CH
1 I
nput
Coupling switch
to
DC.
Apply
the 1
volt
calibrator signal
to
the
CH
1
Input
BNC
connector.
Adjust
the X GAII\J (X-Y) adjustment
for
exactly five divisions
of
horizontal deflection between the
displayed dots.
Horizontal Gain
Connect the calibrator signal
to
the
input
of
either verti-
cal
channel
and
set the vertical MODE switch
to
display this
channel. Set the HOR
IZ
DISPLAY
switch
to
display either
time
base.
Adjust
the appropriate triggering controls
for
a
triggered display at a
sweep
rate
of
one millisecond/
division. Check the display
for
one cycle
of
the calibrator
waveform
for
each
horizontal division.
For
more precise
timing measurements, refer
to
the calibration procedure
given in the Instruction Manual.
17
To Next Page
Loading...
Need help?
General
