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eXact 240
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240-0664
SECT
I
ON
I I I
CA
LIBR
A
TION
3.5.1
PRELIMIN
ARY S
ETTING
S A
NO
DJU
S
TM
E
NTS
(CONTINUED)
(B)
S
ET
T
HE
FUNCTION
GENERATOR
CONTROLS
AS
FOLLOWS:
MULT
I
PLI
ER
CYCL
E
S/
S EC DI AL
10
10
(c)
CA
LIBRATE
THE
OSCILLOSCOPE
AS
FOLLOWS
:
(1)
CONNECT
THE
VERTICAL
AMPLIFIER
OF
THE
OSCILLOSCOPE
TO
A
CALIBRATED
SIGNAL
SOURCE
(B
U
ILT-IN
OSCILLOSCOPE
CALIBRATOR).
(2)
SET
THE
CA
LIBRATOR
OUTPUT
FOR
10
VPP.
(3)
ADJUST
THE
VERTICAL
GAIN
OF
THE
OSCILLO~COPE
AND-C4LI-
BR A
TE
SO
.
TH
AT
1
40
VP P
IS
EQU AL
To
~
4cM
DE
FL
E
CTION.
(4)
GROUND THE
INPUT
OF THE
VERTIC
AL A
MPLIFIER
AND
USING
THE
VERTICAL
PO
ITIONING
CONTROL
OF
THE
OSCILLOSCOPE
SET
THE
SWEEP
EXACTLY
ON
THE
VERTIC
AL
CENTER
LINE
OF
THE
GRATICULE.
NOTE:
THE
OS
CILLOSCOPE
IS
NOW
CA
LIBRATED
TO
DISPLAY
A WA
VEFORM
OF
40
VPP/4cM
WITH
THE
QC GROUND
ON
THE
-CENTER
OF
THE
GR
A
TICULE.
DO NOT
TOUCH
TH
E
VERTICAL
CONTROL
S
OF
TH
E OS
CILLOSCOPE
DURING
THE
FOLLOWING
PROC
ED
URE.
(D)
AT THE
FUNCTION
GENERATOR
ADJUST
THE
A
TTENU
A
TOR
TO
FULL
CCW
ANO
CONNECT
THE
MULTIMETER
BETWEEN
GROUND
AND
THE
MA IN
OUTPUT
TERMIN
A
L.
(E)
A
DJUST
THE
MIN.
A
MP.
DC
BAL
R158
FOR
O
VOLTS
AS
INDICATED
BY
THE
MULTIMETER.
REMOVE
METE
R .
3.5.2
SINE
WA
VEFORM
DC
L E
VEL
A
ND
M
PLITUDE
MEAS
UREMENTS
(A)
CONNECT
THE
VERTIC
AL A
MPLIFIER
OF
THE
OSCILLOSCOPE
TO
THE
MA IN
OUTPUT
TERMINAL
OF
THE
FUNCTION
GENERATOR.
(s)
SET
THE
FUNCTION
GENER
ATOR A
TTENU
A
TOR
TO
FULL
cw.
(c)
Wt
TH
THE
OUTPUT
SELECTOR
s
w1TcH
SET
TO
S
INE
WAVEFORM,
ACCURATELY
MEASURE
AND
RECORD
THE
pp
AMPLITUDE
OF
THE
SINE
WAVEFORM.
(D)
CONNECT
THE
MULTIMETER
BETWEEN
THE
MA
IN
OUTPUT
AND
GROUND·
THE
MULTIMETER
SHOULD
BE
SET
ON
THE
10
voe
SCALE.
(E)
ADJUST
SINE
DC
LEVEL
R154
FOR
ZERO
INDICATION
ON
METER.
INCREASE
METER
SINSITIVITY
AS
NEEDED.