Wavetek 130 Instruction Manual page 11

Triangle Amplitude
1.
Set frequency
dial
for 2.0
(XI
K
range) and func-
tion selector to
.
2.
Connect
oscilloscope,
with 1A5
plug-in,
to
red-
wire
lug
on
function switch,
3.
Adjust
R56
on main board
for positive peak
at
-H.25
volts
±5
mV
(see
sketch).
4.
Adjust
R59
for negative
peak
at
—1
.25 volts
±5 mV.
2.
Set
FREQHZ
selector for
X100K
(
function).
3.
Set
frequency
dial
for 2
kHz
on
oscilloscope
(1/1
00
dial FS).
4.
Adjust
R28
for time
symmetry
at
100:1 frequency
ratio.
5.
Check
for
waveform
time
symmetry
at
the
.2
and 2
frequency-dial
settings.
Frequency
Calibration
Negative Peak
Output Amplifier
\/
Positive Peak
1.
Connect
counter to 50fi
OUT
connector.
2.
Set
FREQ HZ
selector to
X10K.
3.
Align 2.0
dial
mark
with the
dial
indicator index
and
adjust
R173
to obtain
maximum
dial accuracy
on XI
OK
and
XI K
ranges.
4.
Set
FREQ HZ
selector to
X100K
and
dial at 2.0.
5.
Adjust C16
to obtain 200.0
kHz
on
counter
display.
6.
Set
FREQ
HZ
selector to
X1M.
Adjust C12
to
obtain 2.00
MHz
on
counter display
±2%
full
scale.
1.
Connect
oscilloscope to
50fi
OUT
connector with
50-ohm
terminator
(
function).
2.
Set
FREQ
HZ
selector for
XI
K
(VERNIER
full
cw) and frequency
dial at 2.0.
3.
Turn 20
V
P-P
MAX
control
fully
ccw.
4.
Adjust
R150
for
amplitude symmetry
about
ground.
5.
Set
FREQ
HZ
selector for
XI
M
(2.0 dial setting).
6.
Turn 20
V
P-P
MAX
control fully cw.
7.
Adjust
C64
for best
square-wave response without
peaking.
Time Symmetry \/
1.
Connect
unit
and
oscilloscope,
with
1A1
plug-in
set for alternate display, as
shown
in
Figure 4-1.
7.
Dial
alignment
—
No
alignment
is
necessary
if
the
diai
is
the push-on type.
If
it
has
a set
screw,
consult the
dial
alignment procedure
at the
end of
this section.
Sine
Distortion, Amplitude, and
Balance
1.
Set
FREQ HZ
selector for
X1K,
function
selector
to
,
and frequency
dial at 2.0.
2.
Connect
oscilloscope,
with
1A5
plug-in,
to
orange
wire on function
switch.
3.
Adjust
R133
to obtain 2.5
V
p-p
±25
mV
output.
4.
Adjust
R128
to
balance output.
5.
Connect
the
unit, distortion analyzer, and
oscillo-
scope
as
shown
in
Figure 4-2.
Tirne
Syrrirneiry
rvleaSuremenf
for
Test Setup
Figure
4-2. Distortion Analysis Test
Setup
3/72
7