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Table
6-3.
Output
Circuits
(Continued)
Indication: Function outputs missing or
dipped
w
ben
TTL sync
output
OK
Problem
with
triangle
waveform
4
Check
Corrective
Procedure
Rotate
AMPLITUDE cw
(MAX).
DC
OFFSET
to
OFF. and check 500
OUT
(HI)
(or
a
20V
p-p (open
circuit)
triangle
a.
Output
amplitier
circuit
0.
El
5.
E16
wiring.
5.
Check
(or
excessive
discontinuities at the triangle
peaks
near
the
bottom
ol
a trequency
range
(other
than
x
1
to
x
100
).
a
U5
b
SQR
signal
at
cathode
CRlOnot
±2
5V.
6.
Check
lor
nonlinearities
in
the
triangle
slopes
near
the
bottom
of
a
tre-
quency range
(other
than
x
1
to
x
100)
a Associated
timing capaci-
tor
or
C36
b
U5.
CR6
c 09,
01
7
Check
for
a
waveform symmetry
problem
Go
to table 6-8
Table
6-4.
Sine Conversion
Indication: Sine
waveform
problem
Check
1
Set controls
to
initial
positions
(refer
to
paragraph
6
4)
2.
Check
emitter
Oil
(or
a 4 kHz,
±
1
25V
triangle
3.
Von(y
that
the
±
1
.25
triangle
peaks
at
the
emitter
ol
01
1
agree
within
3%,
4.
Select
triangle (unction;
check
for
±
1
25V
triangio
at
U1
3
pin
10
5.
Solect sine
(unction;
check
(or
±
1
25V
sine
at
U13
o*n
10.
Corrective
Procedure
Check
lor
normal
operation
Go
to
table
6-2
a
R62.
R63. R64. R65.
R67. R68. R70.
b
CR8. CR9.
U7.
c.
1
15V
suoplios.
Go
to table
6-3.
step
3.
a
U12
circuitry
b
SW12
6
Check
sine
distortion
500
OUT
(HI)
per
calibration
procedure
(refer
to
table
5.1).
a
R97.
R114
adjustments,
b Waveform
symmetry.
R45
adjustment
and
table
6-8
C
U12
Circuitry
7
Check
sine
amplitude vs frequency per
specifications
(refer
to
section
1
).
C47. C55. C56.
C57
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