General Description; Specifications; Versatility; Frequency Precision - Wavetek 182A Instruction Manual

1.1
THE MODEL
182A
Wavetek
Model 182A Four
MHz
Function Generator
is
a
precision
source
of sine, triangle
and
square wave-
forms
plus
dc
voltage.
All
are
front
panel variable from
0.004
Hz
to
4
MHz
and can be
externally modulated or
swept
over a 1000:1 range. Output
can be
continuous
or the generator
can be
triggered or gated by an
exter-
nal signal or
a
front panel switch.
Amplitude
of
the
waveforms
is
variable
from 10V
peak-to-peak
into
500
down
to
30
mV
p-p.
DC
reference
of
the
waveforms
can be
offset positively or negatively.
The main waveform
output
is
20V
peak-to-peak maxi-
mum
and can be
varied over a 30
dB
range.
A
second
waveform
at
2V
peak-to-peak
maximum
(20
dB
at-
tenuation)
and a TTL
level
square
at
generator
fre-
quency are
auxiliary outputs. Inputs are provided
for
external voltage controlled
generator frequency (VCG)
and
for triggering
and
gating the generator.
1.2
SPECIFICATIONS
1.2.1 Versatility
Waveforms
Sine
%
.triangle
a,
.square 1i
,
TTL
pulse
n.
and
dc.
Operational
Modes
Continuous: Generator
runs continuously
at
selected
frequency.
Triggered:
Generator
is
quiescent
until triggered
by
external signal or manual
trigger,
then generates
one
complete
waveform
cycle
at
selected frequency.
Gated: As
triggered
mode,
except output continues
for duration of
gate
signal.
Last
waveform
started
is
completed.
Frequency Range
0.004
Hz
to
4
MHz
in
7 overlapping
decade
ranges:
xl
0.004
Hz
to
4
Hz
X
10
0.04
Hz
to
40 Hz
xl 00
0.4
Hz
to
400 Hz
x
IK
4
Hz
to
4
kHz
x
10K
40 Hz
to
40
kHz
X100K
400 Hz
to
400 kHz
x 1M
4
kHz
to
4
MHz
SECTION
I
GENERAL
DESCRIPTION
Function Output
%
r
\
,
1,
selectable and
variable
to
20V
p-p
(10V
p-p
into 50Q) HI output, and
to
2V
p-p (IV p-p
into
50Q)
LO
output. Both outputs varied with a
30
dB
ver-
nier.
Peak
output current
is
1
00
mA
maximum
(HI out-
put)
into 500
(200
mA
peak
into
a short
circuit).
Source
impedance
is
500.
DC
Offset and
DC
Output
Waveform
offset
and
dc output selectable and
variable
thru HI
and
LO BNC
outputs.
DC
output selectable by
not selecting a
waveform
function. HI output
is
±
10V
max
(
± 5V
into 500) as
offset or
Vdc
output. Signal-
peak
plus offset limited to
±
1
0V
(
± 5V
into
500).
LO
output
is
±
1
V max
(
±
0.5V
into
500) as
is
signal-peak
plus offset
limit.
DC
offset
plus
waveform
attenuated
proportionately
at
LO (-20
dB)
output.
TTL
Pulse Output
TTL
pulse
(50%
duty
cycle)
at
generator frequency.
Drives
up
to
20 TTL
loads.
VCG
—
Voltage Controlled Generator
Up
to
1000:1 frequency
change
with external
0
to
±4V
signal.
Upper and
lower frequencies
limited to
maximum
and minimum
of
selected range.
Slew
Rate:
2%
of
range per
fts.
Linearity:
±0.5%
thru
X100K
range;
±2%
on
xlM
range.
Input
Impedance:
2
kQ.
Trigger
and Gate
Input:
TTL
compatible
levels.
Pulse Width: 50 ns minimum.
Repetition Rate: 4
MHz
maximum.
1.2.2
Frequency
Precision
Dial
Accuracy
±5%
of
full
scale.
Time Symmetry
Square
wave
variation
from
0.2
to
4.0
on
dial
less than:
±1%
to
100
kHz;
±5%
to 4
MHz.
1.2.3
Amplitude
Precision
Sine variation with frequency
less than:
±0.2 dB
on
all
ranges through
X100K; ±1.0 dB
to
4
MHz.
1-1