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Section IV
Figure 4-2
650A
Since the calibration and frequency response of
the Mo d e
is usua ll y much b e
l 456A
accuracy of the best instruments generally avail
ab l e for this test, the purpose of this test is to de
as i l y only if
termine
e
there
Model 456A.
wrong with the
1.
Connect probe to test setup as shown, looping
he wire through the probe jaws ten times.
t
2. Set Model
650A
to
range.
3. Set
400D/H/L
Model
4.
Adjust AMPLlTUDE
H/L
reads
exactly 0.1
Figure
4-2
r&;
ter than the
t
is something radically
I KC and on the 3
VOLT
0.1
VOLT
to
range.
control on
650A until400D/
volt.
Calibration and Frequency Res p o nse
4-2.
�
456A
Connect the OUTPUT cable of the
5.
400D/H/L
input
of th e
Leave the wires still connected to the
Reading should be within sum
6.
400D/H/L.
Read
of specifications of the 470C and
7. Re p
e
with 650A
at above step s
quencies up to 100 kc.
en c y response is poorer than test ac
u
or f r e q
curacy or specifications the p r obe may be bad.
However,
since the test accuracy is usually
much poorer than the specifications the best
p
way
to test a
ro b e is
process with another probe known to be good and
p a re re s
l ts .
co
m
u
(approximate
method
Model
456A
456A
to the
470C.
in place of the
470C.
456A.
s et at other fre
If the
456A
calibration
to repeat the above
)
00395-1
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