The Model 183; Specifications - Wavetek 183 Manual

1.1
THE
MODEL
183
Wavetek
Model
183, the 5 MHz XCG/Sweep Generator, is
a
precision source of
sine, triangle,
square,
positive
pulse
and
negative pulse waveforms plus
dc voltage. Frequency of
the
waveforms
is
manually and remotely variable from
100pHz
to 5
MHz.
Select frequencies
from 2
Hz
to
5
MHz can
be
locked
to a
crystal oscillator
for
maximum frequency
accuracy.
The generator can
repetitively
sweep between
two
individ-
ually
set frequencies and
at
a particular
sweep rate.
The
amplitude
of
waveforms
is
continuously variable
from
2OV
p-p, open
circuit
maximum,
to
-80
dB.
DC
reference
of
the
waveforms
can be offset
positively
and
negatively.
The symmetry
of
the waveforms
is
continuously adjustable
from
approximately
1
:19
to
19:1. Varying symmetry
pro-
vides variable
duty
cycle pulses, sawtooth
and asymmetrical
sine
waveforms.
A
voltage representing generator frequency,
a fixed-ampli-
tude
pulse train
of
that
frequency, and
a
voltage
ramp
representing
frequency
sweep
rate are provided as front
panel outputs.
1
.2
SPEC
I F
ICATTONS
Specifications (waveform, frequency,
and
amplitude
selec-
tion),
operating
modes,
precision (accuracy),
and waveform
purity
(quality)
are listed in the following paragraphs.
1.2.1
Versatility
Waveforms
Five
selectable waveforms,
sine
\
,
triangle
\
,
square
tl_, ,
positive pulse
n
, negative
pulse
Lf
,
plus
variable DC
output.
Symmetry
of all waveform outputs
is
continuously
adf
ustable from approximately
1:19
to
19:1.
Varying symmetry provides
variable
duty cycle pulses,
saw-
tooth,
or asymmetrical
sine
waveforms.
Separate sync
output
is included.
SECTION
GENERAL DESCRIPTION
Control
Frequency can
be
controlled manually, with
external
voltage
(VCG) or with
internally
generated ramp voltage.
XCG
(Crystal Controlled Generator), when
selected, crystal locks
on
every frequency corresponding
to
the calibration
marks
on the dial.
Operating Frequency
Range
Frequency selectable
from
0.0001
Hz
to 5
MHz in
the
following
linear
ranges:
x
0.001
.
x
0.01
x
0.1
X1
O.OsHztobHz
X10.
0.SHztoS0Hz
X
100
0.5 Hz to
500
Hz
X1K
S1zto5kHz
X
10K
50
Hz
to
50 kHz
X
lOOK
500 Hz to 500 kHz
5 kHz
to
5
MHz
X lM
NOTE
When
SYMMETRY control
is used, the output
frequency is different from
the dial
indicated
frequency.
The maximum symmetry ratio
ob-
tainable
r's
also
dependent
on
the
frequency
dialsetting.
Symmetry must
be normal
for
XCG
operation.
There are 25 XCG
frequencies
in
each
of
the
X
l0
thru
X
lM
ranges.
Main Output
\
, \
, -L
;
variable
to
ZOV
p-p into
open circuit
and 10V p-p into
50Q
load. DC offset of waveform
(or
DC
if
selected) is adjustable
to t10
volts
open
circuit
and
t5
volts
into 50O
load.
n
, -tJ
,
DC:
0
to
+10 or
-10
volts into open circuit
and
0
to
+5
or
-5
volts
into 50Q
load.
Output
dc
voltage
is
limited
to
approximately
t10
volt
open
circuit
and
output current
is
limited to
appr:oximately
130
mA.
0.0001 Hz to 0.005
Hz
0.001 Hz to 0.05
H z
0.005 Hz
to
0.5
Hz