3.3
. 3 k
Hz
Filt
",
o.
MATCHING IMP
.:
"600"
COMPRESSOR
SP
EED:
"Comp.
Ofr'
SW
ITCH
07:
"Scanning Off"
BANDWID
TH
SELECTOR:
"10Hz"
METER
SWITCH:
110.3
sec .
Output
Vo
lt
,"
b.
Check
BANDWIDTH
SE
LECT
OR
in
all
positions
BANDWIDTH SELECTOR:
Before adjustment
of
the coils toke the instrument out
of
its
case
and
leave it
swi tched
on
for
2 hours
min
.
This
ensures that condensers and
coils
hove the
same temperature .
Remove
tube
V 13
and
connect
ty~
1022
to
filt
~
r
input
(R
115).
Input
signal: 2
mV
3000
Hz
t
0.3
Hz
.
Adiust Z 3
and
Z 4 for max .
defleclion
on type
l024.
Change
the
frequency appro
x.
+ and - 100
Hz
and check the top
of
the filter
curve.
Jt
should be flat
wit
hin 2
dB
and the height
of
the three tops should be
within -
0.5
dB
.
10
Hz
30
Hz
1
00
Hz 300
Hz
Frequency
Damping Frequency
Hz
dB
Hz
3ooo!
0
0
3000::
5
3
10
min.
10
20 20
30
30
3.4.
3
kH
z
Oscillator
BANDW
IDTH
SELECTOR: "Sine"
3.5.
Noise Generator
MATCHING
IMP
.:
"600
0"
COMPRESSOR
SPEED:
"Comp.
Off"
SWIT
CH
07:
"Sc:onning OWl
BAND
WI
DTH
S
ELECT
OR:
"Sine"
METER
SWIT
CH
: "
10
sec.
Output
Volt. "
FREQUENCY SCALE:
"1000
Hz"
b.
BANDWIDTH
SELECTOR
to
20-20000
Hz
c.
B
AN
D
WIDT
H
SE
LECTO
R in pos
it
ions
10 -
30-100-300Hz
d.
BA
NDWIDTH
SE
LECT
OR to
20-20000
Hz
1024.3
-
2.68
0
15
30
60
90
Damping Frequency Damping Frequency
Damping
dB
Hz
dB
Hz
dB
3000 ±
0
3000+
0
0
50
-150
3
min . 20
1
00
min .
20
300
min.
20
40
200
40
600
50
50 300
50
Short-circuit 91 on V 1 (pin 2)
to
ground and
connec
t a frequency counter an
the
sec9f\dary
af
Z
4.
The
frequency should be: 3000 H
z.
Tolerance::
1 Hz.
Ad
j
ust
P 8 to 200
mV
measured an the secondary
of
Z
4.
Connect an
oscilloscope
to LOAD terminals and adjust the
OUTPUT
LE
V
EL
for
a 20
dB
deflection
on
type
1024.
Check that
th
e amplitude distribution
of
the noise
is
symmetrical .
If
necessary adjust P
2.
Check
the
defl
ect
ion on
type
1024:
19
- 21
dB
.
If
necessary adjust P 7 .
Check
the
deflection
on
type
1024
:
19
-
21
dB.
If
necessary adjust P
3.
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