Wavetek 188, Инструкция по эксплуатации

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Scans by Artekmedia
=>
2011
1
1.1
THE
MODEL 188
The
Wavetek
Model 188,
4
MHz
Sweep/Function
Generator, is
a
precision source of sine, tr
i
a
n
g
l
e and
square waveforms plus dc voltage.
All
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 s . weep
over
a
1000 :
1
(linear) frequency
range
or
10,000:
1
(logarithmic)
frequency range
.
Output
can be con­
tinuous
or
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 1S mV peak-to-peak. DC
r e
f
e r e
nc
e
of
th e waveform can
be
offset positively
or
negatively.
The two selectable waveform outputs are a 20V
peak­
to-peak
maximum
and a
2V
peak-to-peak
maximum
(20
dB down from 20
Vp-p):
both
may be varied over a
30 dB
r
a
n g
e
. Auxiliary outputs
are
a TIL
level
sync,
a
6000 sweep ramp and a 6000 generator control
v
o
l t a ge signal whose
level is proportional
to the
main
generator
frequency.
1.2 SPECIFICATIONS
1.2.1 Versatility
Waveforms
Sine
'\;
I
triangle
"v
,
s
q
uare
�
,TIL
pulse
-"­
and dc.
Operational Modes
Continuous:
Generator
runs
continuously a
t selected
frequency.
Triggered:
Generator
is quiescent until triggered by
exte
r
na l 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
c omp l e t e d .
SECTION
GENERAL DESCRIPTION
Sweep: An internal ramp
generator
will
sweep the
main
generator
from
a l o
w
e r
,
start
frequency
to
a
h i gh e r stop frequency, linearly (3 decades) or
loga ri th m i cally
(4 d e ca d es ) .
Sweep
S top : Frequency
switches
to high sweep
limit.
Used to set high frequency
limit
Frequency Range
0.004 Hz
linear
( 0 . 00 0 4
Hz
log) to
4 MHz In 7 overlap­
ping
de
c
a
de
ranges:
Xl
. . . . . . . . . . .
.
. . . . . . . .
.
.
0.004
(0.0004)
to 4 Hz
xl0
.
. . . . . . . . . . .
.
. . . . . . . . .
0.04 (0.004) to 40 Hz
x
100
.
.
.
.
. .
. . . . . .
.
. . . . .
. .
. .
0.4
(0.04)
to 400 Hz
X
1 K
. . . . . . . . . . . . . . . . . . . . . . . . . .
4
(0.4)
to 4 kHz
x
10K
. . . . .
.
.
.
. . . .
. .
.
. .
.
. .
.
.
.
.
40
(4)
to 40 kHz
x
100K
.
.
.
.
. . . . . . . . . . . . . . . .
400
(40)
to
400
kHz
x
1 M
. . . .
.
. . . .
.
. . . . . .
.
. . . . .
4
(0.4)kHz to 4 MHz
Function Output
'\;
, "v
, '1.J
selectable
and
v a
r
iab
l e
to 20
Vp-p
(10 Vp-p
into
500)
HI output, and to 2
Vp-p (1 Vp-p
into
SOO) LO output. Both
outputs varied
with
a 30
dB
ver­
nier.
Peak
output current
is 1
0
0
rnA
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
through 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
±
10V (±
5V into
500).
LO output is ± 1
V
max
(± 0 . 5V int o '
500)
as
is
signal-peak plus
offset
limit.
DC offset
plus
waveform
attenuated
proportionately
at
LO
(
- 20 dB) output.
TTL Sync Output
TIL
pulse
(50% duty cycle)
at
generator
frequenc y .
Drives
up
to 20
TIL l o a d s .
OCV
-
Generator Control Voltage
o to 4.0V
open circuit
output
from
6000
source
im­
pe d ance . Proportional to frequency
of main
gener a t or . For
use as a
horizontal
drive
signal.
'-1