Calibration
Procedure—465B
Service
Performance Check
c. Set
calibration
generator for 10 mV
output
amplitude.
d.
CHECK—
Display is approximately 4
divisions.
11.
Check INVERT Mode
a.
Press
CH
2
INVERT push button
in.
b.
CHECK—Display is
approximately zero division.
12.
Check
Vertical Low-Frequency
Compensation
a.
Set:
TIME/DIV
(both) 0.2 ms
VOLTS/DIV (both) 5 mV
b.
Connect the calibration
generator fast-rise
+ output
totheCH 1
input connector
via
a
50 fi bnc cable.
lOXbnc
attenuator, and 50
fi
bnc
termination.
c.
Set the
calibration generator to 1 kHz and
adjust
output controls for a vertical
display of 5 divisions.
Adjust
the A
TRIGGER LEVEL
control for
a
stable
display.
d.
CHECK—Rounding or
overshoot is within
3%
(0.15
division) at the
frequencies listed in
Table
4-3.
Table
4-3
LOW-FREQUENCY COMPENSATION SETUP
Calibration
TIME/DIV
Generator
Switch
Frequency
Setting
1 kHz
0.2 ms
10 kHz
20 ps
100
kHz 2
us
13.
Check CH 1
and CH 2
Volts/Division
Compensation
a.
Set:
VOLTS/DIV (both) 5
mV (see note)
A TIME/DIV
0.2
ms
NOTE
In
step
13 all
VOL
TS/DI V settings require
the use of a
10X
probe with
scale-factor switching
(preferably
the
probe supplied as a
standard accessory
with the
oscilloscope you
are performance
checking). If it is
necessary to use
a
10X
probe without
scale-factor
switching, set the
VOLTS/DIV to indicate
one tenth
of the settings listed.
b.
Connect
a
10X probe to the CH 1 input connector
(note that the
VOLTS/DIV Scale-Factor
switching LED
indicates 50 mV).
c.
Connect the
square-wave generator
high-amplitude
output through a 2X,
5X, or 1 0X bnc
attenuator (depending
on generator
amplitude), to
a
50 fi
bncterminationthat is
connected to a
bnc-to-probe tip adapter.
Insert the 10X-
probe
tip into the probe-tip
adapter.
d. Adjust the square-wave
generator for
a
5-division,
1 kHz
display, and add or remove attenuators
and ter-
mination as necessary to
maintain
a
5-division
display
throughout
step 13.
e.
Adjust the probe compensation for the
best flat-top
waveform.
Do
not re-adjust
probe compensation
throughout the remainder of step 13.
f.
CHECK
Rounding or overshoot on the
waveform is
within
3%
(±0.15
division) at all settings of the
VOLTS/DIV
switch between 50 mV and 5 V.
g.
Move the test setup to
CH
2
input connector
and set
the
VERT MODE
switches to display CH ?.
h. Repeat step
13,
part f, for
Channel
2
(add or remove
attenuators as necessary to
maintain
a
5-division display).
i.
Disconnect probe and
generator.
14.
Check CH 1 and CH 2
Transient Response
a. Set:
TIME/DIV (both)
0.05
ps
VOLTS/DIV
(both) 5
mV
A TRIGGER SLOPE +
4-9
To Next Page
Loading...
Need help?
General
