Section V
N,lotiel 3575 A
i.
For a standard
instrurDent
(oue panel
rneter)
go
to
is
0.17
uII
to 0.56
pll.
If redding
is high, change
Step
j.
For Options
001
-
003
(trvo par)cl
meters)
go
to
1.1* to 0.17
ttH
i.l lott',.hange
Ll* to
0.56
lJll.
Step
k.
ltt sonte eqrlier
ilstruments'
A3IA4L1*
is com-
prised
oJ'a 0-22
pH
Jixed
indttctor
(-hp'
j.
Ser
AMPLTTUDE
FU\CTION
to B and
adjrrst
A4L1
9100'1611)inserieswithaA.22pJttoA.33
f
loi a lcft
panel
nreter
rcading o15.5
to 5.7. wriable
itductor
t-ltp-
9100-1379) ot
a singlc
0.35
pH
ru 0.55
1tt
variablc
inductor
(-llp'
k.
With tlrc A\IPLITUDE
F'UNCTION
set
to A, aditrst
9100'3294).
At th('
factor.t',
A3l74l-1 n
A,lL1
lor a right
panel nteter
readilg of
5.5 to
5.7.
adjusted
tt)
pntduce
a
Log A ot
Log B reatling
l. Rerrove
rhe
A4 asserubly
1ro.r
tle
e\tender
arld
'i!,
i,!
i ,i!ri;;:Jh
.2
v rms' 1 3
MII: apptied
inslall irl tlic
irstruntent.
nr.
Replace
tltc A3 antl
A4 screws.
S49
Factory Selected Components'
NOTE
5-50.
Certain
cornponcrts
within the 3575A
are individ-
ulll)
sclected
at thc factory
to
conlpensate
for slightly
Irt earlier instnonents
A3lA4t,l*
tt'erc
Jit:tory
varying cireLtit
paranrcters.
These corttponcnts are idcntified
selected contponcnts.
The)
\tere sele(tuLl
tt)
by an asterisk
(x)
in the
parls
list and schernaric dilgrauts
protluce
Log A or
Log B readings
ol
+
6.() LIB
t- and a li,pical
value is shown. Table 5-5
is a list of the
! t).3
dB l, witlt 2
l'rms,
13 MH. upplicd
1.)
factory
selected
conlpolcnls.
tllcil functions and typical
the
input.
The t)'pical wlue
rungc
tl A3lA4l'1*
valrtc
rarges.
Table
5-5. Factory Selected Components.
Designalor
Typical
Value
Bange
A3/A4R3r sets
ranqe of Log
Amplifier
Gain Adiust, A3/A4R32
lncreasinq
R31*
increases
gain. Normal values range
from
3.01
K
to
4.99;
however,
values up to 19.1
K can be used. Change
B3'l
*
only
if
proper gain
adjustment
(Paragraph
541) cannot be
oblained.
3.O1 K to 19.1 K
46 C8*
-
Cr
3*
47
C8*, C15"
A9
C8*, C15.
A10
C8
*,
Cl5*
A11
C6* C9*
Provision
is made
for adding
ihese capacitors to
permit
the use
of lC
operational
amplifiers
that require high
frequencv
30
pF
ro 1oo
pF
(lf
required)
ADJUSTMENT PROCEDURES
5-14
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