Table of Contents
Advertisement
SECTION
I
GENERAL
DESCRIPTION
1.1
THE
MODEL
188
The Waveiek Model
188.
4
MHz
SweetVFunction
Generator,
is
a precision
source
of
sine, triangle
and
square
waveforms
plus
dc
voltage
Ail
waveforms
are
front
panel variable
from 4
mHz
to
4
MHz
and can be
internally or
externally
modulated Frequencies are
variable
linearly
or logarithmically within
a
frequency
range
When
used
as a
sweep
generator,
an
internal
ramp
generator provides a recurring
sweep
over a
1000:1
(linear)
frequency
range
or
10.000:1
(logarithmic)
frequency range Output
can
be
con-
tinuous
O'
the generator
can be
triggered
or
gated by
an
external signal
or
a
front
panel switch Amplitude
of
the
waveforms
is
variable
form
10V
peak-to-peak
in-
to
500 down
to
15
mV
peak-to^eak.
DC
reference
of
the
waveform can be
offset positively or
negatively
The two
selectable
waveform
outputs are
a 20V
peak-
to-peak
maximum
and
a
2V
peak-to-oeak
maximum
(20
dB down
from 20
Vp-p).
both
may
be
varied
over a
30
dB
range
Auxiliary
outputs
are
a
TTL
level
sync, a
6000 sweep ramp
and
a
6000
generator
control
voltage
signal
whose
level
is
proportional
to
the
main
generator frequency
1.2
SPECIFICATIONS
1.2.1
Versatility
Waveforms
Sine
%
.triangle
\
.square
'L
.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
Las:
waveform
started
is
completed
Sweep An
Internal
ramp
generator
will
sweep
the
main
generator from a
lower,
start
frequency
to
a
higher
stop
frequency,
linearly
(3
decades)
or
logarithmically
(4
decades)
Sweep
Stop Frequency switches
to
high
swoop
limit.
Used
to set
high
frequency
limit.
Frequency
Range
0
004
Hz
linear
(0
0004
Hz
k>g)
to 4
MHz
In
7 overlap-
ping
decade
ranges
xl
x
10
x
100
x
IK
X10K
X100K
X
1
Function Output
'K*
.
\
selectable
and
variabio to
20
Vp-p
(10
Vp-p
into
50Q) HI
output,
and
to
2
Vp-p
(1
Vp-p
into
50Q)
LO
output
Both outputs
varied with a
30
dB
ver-
nier.
Poak
output current
is
100
mA
maximum
(HI out-
put)
into
500
(200
mA
peak
into
a
short
circuit)
Source
impedance
is
50Q.
DC
Offset
and
DC
Output
Waveform
offset
and dc
output selectable
and
variable
through HI
and
LO
BNC
outputs
DC
output selectable
by
not
selecimg a
waveform
function.
HI output
is
4
10V
max
(± 5V
into
500) as
offsot
or
Vdc
output.
Signal-peak plus
offset limited to
±10V (±5V
into
500).
LO
output
is
4
IV
max
(±0.5V
into
500) as
is
signal-peak plus
offset
limit.
DC
offset plus
waveform
attenuated
proportionately
at
LO
(
-
20 dB)
output.
TTL Sync Output
TTL
pulse
(50%
duty cycle)
at
generator frequency.
Drives
up
to
20 TTL
loads.
GCV
—
Generator Control Voltage
0
to
4.0V open
circuit
output
from
6000
source
im-
pedance
Proportional
to
frequency
of
main
generator. For
use as
a
horizontal drive
signal.
0
004
(0
0004)
to
4
Hz
0 04
(0.004)
to
40
Hz
0
4 (0
04)
to
400
Hz
4
(0.4)
HZ
to
4
kHz
40
(4)
HZ
to
40 kHz
400
(40)
Hz
to
400 kHz
4
(0
4)kHz
10 4
MHZ
1-1
Advertisement
Table of Contents
