Wavetek 132 Instruction Manual page 8

X100K
SEQUtMCEVENGTM
iOlSEFREO
hA
OUTPUT A
I
TEN
!<jb:
Figure 2-1
.
Operating Controls,
Front Panel
10.
FM —
Depressing
this
push button along with
the
FUNC
push button
(7)
allows the selected
signal,
either
Ay
,
Ay
,
or
Oj wave,
to
be
pseudo-randomly frequency modulated,
or
jit-
tered. "The
modulating
signal
is
provided
by
pseudo-random
analog
noise,
and the
S/N
—
N/S
(dB)
controls
frequency
deviation.
The
bandwidth
of the
modulating
signal
is
controlled
by the
NOISE
FREQ
FIZ selector (15)
and
vernier
(16).
11.
5012
OUT —
Provides the selected generator out-
put function.
The
generator
may
operate
into
an
open
circuit
providing
20
V
peak
to
peak maxi-
mum,
or
into a
5012
load
providing
a
10
V
peak
to
peak output.
12.
OUTPUT ATTEN
(dB)
-
Attenuates
the
output
(both
signal
and
noise)
from 0 dB
to
—60
dB
in
six
calibrated
10
dB
steps
according
to
the
fol-
lowing
table:
Step
Output
peak
to
peak
into
5012 Load
Attenuator
Position
Maximum
Vernier
fully cvv
Minimum
Vernier*
0
dB
10
V
1
V
—
10
dB
3
V
0.3
V
-20
dB
1
V
0.1
V
-30
dB
0.3
V
0.03
V
-40
dB
0.1
V
0.01
V
-50
dB
0.03
V
0.003
V
-60
dB
0.01
V
0.001
V
*
The
values
in
this table are
approximate.
The OUT-
PUT VERNIER
(dB)
(6)
will
reduce
the
output
approximately
20 dB
in
all
cases, as
shown.
13.
S/N
—
N/S
(dB)
—
I
n
theS/N mode,
this
control
attenuates the analog noise
from 0
to
—50
dB
in
five
calibrated
10
dB
steps.
The
selectable
signal
5