PRO-TEK B-810 User manual

INST
RUCTION
MANUAL
...

l
l
I
T
‘
SWEEP
FUNCI'
ION
GENERATOR
CONTENTS
SECTlON TITLE PAGE
I. GENERAL |NFORMAT|0N . INTRODUCTION 2
1
2.
DESCRIPTION
3. FEATURES
4. SPECIFICAT|ON
5
G
.
ACCESSORIES
SUPPLIED
.
ACCESSORIES
AVAILABLE
4
IL INSTALLATION 1. INTRODUCTION 5
2. PREPARATION FOR USE 5
1) Power Requirements
2) Lino Vohage and Fuse Sebcdon
3) Operating Environment
‘
3.
STORAGE
ENVIRONMENT
6
lll.
OPERATION . 1. lNTRODUCTION
2. PANEL FEATURES
1) Front Panel Features 7
2) Roof Panel Features 10
3. OPERATING INSTRUCTIONS 12
1
1)
Operaüng
Proceutions
1
2
2) Counter (¡NT/EXT) 13
k
3)
Basic
Signal
Generation
(eine,
triengle.
square.
sync out)
4) Trigger/Gate Mode
» 5) Burst Mode
í
6)
Sweep
Modo
4
7)
Symmetry
"i B) DC Offset/DC cut
I
9)
Amplitudo
Modulation
20
10) veo Operation 22
11) Combhation of Funcüom . 23
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SECTION
l
GENERAL
INFORMATION
1 . INTRODUCTION
metían required to install and operate the Sweep
strument and supplied accessories. This section
nd
other
basic
information.
This operating manual contains the infor
Function
Generator.
Figure
1-1
shows
the
In
covers
description,
Specifications,
accessories
a
Z.
DESCRIPTION
This Sweep Function Generator ¡s a 0.01 Hz to 10 MHz function generator, with internal
counter
and
external
counter.
This
instrument
generates
a
variety
of
waveformes,
containing
sino, square, triangle, ramp, and pulse signals. The frequency counters is built in 6 digit, high
seven segment yellow LED display. Because it provides such different operation modes as
continuous generation, gate generation, trigger generation, burst wave generation, and sweep
generation,
its
can
be
used
for
diverse
applications
-—
for
example,
for
frequency
characteristic
measurement of audio/video equipment and in the testing of automatic control devices.
SWEEP
FUNCTION
GENERATOR
NIODEL
Gana
“Á

3. FEATURES
o Wide frequency range of 0.01 Hz to 10 MHz.
O Frequency counter range 0.1 Hz to 10 MHz
Internal: all range
External:
1
Hz
to
10
MHz
O
Gate
and
trigger
generations
are
possible.
‘
lt
provides
gate
generation
to
supply
signals
for
a
fixed
period
of
time,
and
trigger
generation
to
supply
signals
for
one
cycle.
The
trigger
points
can
be
arbitrarily
set.
O Burst waves can be generated by the built-in oscillator.
O
Built-¡n
Iinear/logarithmic
sweep
functions,
O VCG function for external control of output frequency.
O
GCV
function
to
generate
a
voltage
in
proportion
to
the
frequency.
. Built-¡n amplitude modulation circuit with the suppressed-carrier mode.
-
Variable
Waveform
symmetry.
O DC offset function to superimpose DC voltage on output waveforms. ln addition, DC voltage
only
can
be
obtained.
4. SPECIFICATION
1) Frequency Range z 0.01 Hz-10 MHz, 9 Ranges
Accuracy
z
Counter
accuracy
Z)
Waveforms
:
Sine
wave,
triangi‘e
wave,
square
wave,
ramp
we‘ve,
and
pulse
wave
Sine wave
Flatness z 0.01 Hz to 100 KHz: i 0.2 dB
.
'
100
KHzto
10
MHz:
1:2
dB
Distortion z I10 lll): to 50 KHz: 0.5% or less (at more than 100ran-p Output
eve
Triangle
wave
Linearity error : <1% of rated am litud
guare wave p e at 100 Hz
Rise/Fall time
.
‘
z
25
ns
or
less
(with
max.
output)
Symmetry
vanation
:
20:80
to
80:20
(0.01
Hz
to
10
MHz)
3)
Frequency
Counter
Characteristics
Frguency
measurements
Range z 1 Hz to 10 MHz
(¿ete time z 0.01 s, 0.1s, ls, 10s switch selectable
ccuracy ‘ z 3:1 count/:l: time base error
Ext count mu characteristics
meansitivity
z
SO
mV
rms
ance : Approx. 1M
Max voltage without O less then 35PF
damage
z
250V
DC+
GM! l AC rms)
z
B
digit:
7mm
yellow
LED
dis
overllow,
KHz,
Hz
indication.play
WM
decimal
point
gate
time,
_3_

eration
Mode
_
4) OP ' Continuous generation
h
.
.
.
n
.
I
SRv‘IlG/GATE
:
TRIG:
One
cycle
oscullatlon
triggered
la;
Input
Signs
1'
GATE: Oscillation only when Input is z
4
Frequency range z 0.1 Hz-l MHz g
Input voltage z TTL level (DC to 100 KHz)
z
Variable
'
.
.
’
\
SERE/i'm!)
phase
:
Burst
wave
oscillation
for
gate
time
of
1ms
to
103
by
built-in
,
oscillator. 'i
ON/OFF time is symmetrical and variable. .. Í
SWEEP
'
z
Sweep
mode:
selection
of
linear
and
logarithmic
sweeps
2
l
.
Sweep time: 1ms to 10s, 2 range, contínuously variable.
fly-back
line
interval
is
symmetrical
and
variable.
Sweep Width: Max. 1: 100, contínuously variable. y
(sweep start frequency can be specified.) i
5) Output Characteristics
Output
level
:
20
Vp-p
(open
circuit)
Attennuator z O, 20, 40, 60 dB, contínuously variable.
lmpedance z 5091 10%
DC offset : Max. :t 10V (open circuit)
SYNC
output
:
TTL
level
(duty
cycle
are
symmetrical
and
variable)
i GCV output z Voltage output in proportion to frequency, Gta SV (MAX. frequency
in
each
range)
SWEEP
output
z
Sweep
output
in
sweep
mode,
O
to
-
SV
SWEEP/BURST
G ATE out Z TTL level
G) Amplitude Modulation (AM)
Modulation level z O to 100%, contínuously valiable.
Input sugnal level : Max. 5 Vp-p suppressed-carrier mode.
7) VCG (External Control of Frequency)
Frequency
range
:
Max.
1000:1,
with
fre
ue
'
‘
"
"
Input level Z 0to _ q ncy ls dial set to 10
SV li frequency is decreased by negative voltage
8) Power Requirements z 100/120/220V :t 10%, 240V + 5 40% (48 to 66 Hz)
9) Size and Weight z 300(W) x 30
10) Time Base z Frequency; lo MHzOlD) mm Approx. 4 Kg
Aging rate: i 3 x lOs/month
Temperature:
i
1
x
10‘5
for
0°C-40°C
5.
ACCESSORIES
SUPPLIED
The Fig. 1-1 shows the Sweep Function Generator power cord and fu
. ses.
S. ACCESSORIES AVAILABLE
BNC to BNC Coxial Cable (Length im: 1EA)
_4_

rp‘
SECTION
II
INSTALLATION
1 . INTRODUCTION
This
section
provides
installation
instructions
with
this
Sweep
Function
Generator.
Th;
section
also
includes
information
on
preparation
for
using
the
Sweep
Function
Generator
an
storage.
Z. PREPARATION FOR USE
1 ) Power Requirements.
This
Sweep
Function’Generator
requires
a
power
source
of
100,
120,
220
Volts
ac
:l:
10%
or 240 Volts ac zi: 5% — 10%, 48 to 66H: single phase.
WARNING
IF
THIS
INSTRUMENT
IS
TO
BE
ENERGIZED
VIA
AN
EXTERNAL
AUTO
TRANSFORMER
FOR
VOLTAGE
REDUCTION,
BE
SURE
THAT
THE
COMMON
TERMINAL
IS
CONNECTED
TO THE NEUTRAL POLE OF THE POWER SUPPLY.
2)
Line
Voltage
and
Fuse
Selection
CAUTION
BEFORE TURNING THE SWEEP FUNCTION GENERATOR LINE SWITCH TO ON. VERIFY
THAT THE INSTRUMENT IS SET TO THE VOLTAGE OF THE POWER SUPPLIED.
Figure
2-1
provides
instructions
for
line
voltage
and
fuse
selection.
The
line
voltage
selection
and
the
proper
fuse
are
factory
installed
for
the
voltage
appropriate
to
instrument
destination.
CAUTION
USE PROPER FUSE FOR LINE VOLTAGE SELECTED.
“W.
..
M.“
"a.

r
SELECTION
OF OPERATING
VOLTAGE
‘l. Disconnect power cable.
Z. Pull the fuse holder out.
3. Select operation voltage by
orienting
Fuse
holder
to
position
desired
voltage
ac-
cording
to
’V'
mark
on
the
AC INLET.
4.
Re-insert
the
fuse
holder
in
AC
INLET,
be
careful
to
select
correct
fuse
value.
Operating
Voltage
Puse
100 Vac or 120 Vac A 250V
220 Vac or 240 Vac OEA 250V
Operating
voltage
is
shown
on
the cover of fuse holder and,
is
usually
set
to
120V
at
factory.
Fig.
2-1.
Voltage
and
Puse
Selection
MAKE
SUBE
THAT
ONLY
FUSES
FOR
TH
CAUTION
E
REOUIRED
RATED
CURRENT
AND
OF
THE
SPECIFIED
TYPE
ARE
USED
FOR
REPLACEMENT.
o ‘- . .. . .
85% to 40°C. However, the ínstru perated in envrronments With relative humidmes to
which cause condensation within
3. STORAGE ENVIRONMENT
The
instrument
may
be
stored
or
shi
t Temperature
' Humidity
one
I -20°c to +7o°c
I below 85% RH
ment
must
be
the instrument.
protected
from
temperature
extremas
d in environments within the following limita.
-.M<WWW.

SECTION
III
OPERATION
1.
INTRODUCTION
This section provides the operating information to acquint the user with this Sweep
wn on Function Generator. The section includes panel features, measurement procedures for various
ll’
and
.
.
’ a Iications.
cv at pp
2. PANEL FEATURES
The front panel and Rear panel are shown in Figure 3-1 and Figure 3-2. Description
numbers match the numbers on the figure.
1) Front Panel Features
SWEEP FUNCTION GENERATOR MODEL 6305
sus: euros
xl “tus
un
IZí
’
“nz
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n
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FTHE
l0°C.
[ies
to
remos
Hg.
3-1. Front Panel Features
ser“. “www-7”, vn

Power.
.
C
.
.
(1) Power Switch Applles or Removes A —the counter display LED Will light. Press again
Press the switch to turn the power ON
to
turn
the
power
off.
(2)
Counter
Display
LED
(B
Digit
Seven
Segment
Yellow
Color)
3)
Fre
.
Range
Switch
.
(
This
switch
provides
range
selection
for
output.
.St Fre Dial - .
W mi: Is ¡(red t: control the frequency Of the OUÍPUÏ I9)- The operating frequency B
determined
by
the
multiplying
the
dial
reading
by
the
FREQ.
RANGE
(3)
setting.
With
the MODE (5) set to SWEEP, this dial indicates the frequency at sweep end,
(5)
Mode
Switch
'
This switch is used to select one of five generation modes: CW, TRlG, GATE, BURST, .
or SWEEP.
(G)
Function
Switches
These switches change the waveform of the output (9) to sine, triangle, or square wave.
If
all
three
switches
are
released
(
l
voltage
can
be
obtained
by
using
the
DC
OFFSET (7) control.
(7)
DC
Offset
Control
(Pull-On)
This is used to superimpose DC voltage on the output Pull this knob to use this
function, and push it ¡f superimposition is not necessary.
(8)
Attenuation
(dB)
(02-
Variable
Control
The
outer
knob
controls
the
attenuation
of
the
output
(9)
by
O,
20,
40,
or
60dB.
The
“IIS output [eIIIIIIIaI has a“ "Ilpedallce OT so DIH" . vvllell telllllllated “Un” EC
s
mOdulation)
als
Of
lo
VD.”
(except
for
output
with
amplitude
(10)
TRIG
Start
Level
Control
This
is
used
to
s
ec
BURST.
p
¡iv
start
level
when
the
MODE
(5)
is
set
to
to
TRIG,
GATE'
°r
(11)
Symmetry
Control
(Pull-On)
.
termin
'
.
difference from that of the (“mi txt?“ lmpedance of SO ohms) with a 180° phase
using the SYMM Symmet '
external measurinEgniqnsmY com“ This term' 'ry Of the output can be adJUSt-ed by
cy
by
using
a
COUnter_
ment,
TTL
signal
output
(13)
TRIG
IN
Terminal
This
is
the
input

(14)
Counter
Selector
Switch
Press the switch ( A ) to external counter.
Press again ( 1 ) to internal counter.
(15) External Counter ¡Ñ
Counter
input
connector
for
the
external
signal
input.
(16) AM Switch (ON J. , OFF J. l ._
Press this switch ( .1 ) for amplitude modulation. The MOD IN terminal (17) Is used
to
input
modulation
signals.
(17) MOD IN Terminal
This is the input terminal for amplitude modulation. lt provides an input lmpedance
of about 10k ohms, a frequency range of DC to 1 MHz, and a maximum input voltage
of j: 10V (AC+DC)
(18) LOG l J. l/LIN ( Jn ) Switch
With the MODE switch (S) set to SWEEP, the LOG/LIN switch enables Iogarithmic sweep
or linear sweep to be selected.
(19) SWEEP ( 1 )/SET START l L ) Switch
This switch is used to set the sweep start frequency with the MODE (S) set to SWEEP.
When the switch is pressed ( ... ) for SET START, the sweep'is stopped at the sweep
start
frequency.
Then,
connect
the
generator
output
to
a
frequency
counter
or
oscillo-
scope,
and
specify
a
sweep
start
frequency
by
using
the
START
knob
After
the
frequency
IS
set,
the
sweep
can
be
resumed
by
setting
the
switch
to
SWEEP
(
J.
l
The sweep stop frequency' IS set by using the FREQ. dial.
(20) Start/MOD Level Control
This' IS used to set the sweep start frequency and to change the amplitude modulation
level.
(21) Time 01- lOs( l. 100ms(.l )Switch
This switch IS used to switch the time ranges for burst gate or sweep when the MODE
switch (5) IS set to BURST or SWEEP.
(22) AM Carrier Level Control
This IS used to adjust carrier levels for amplitude modulation. With a setting around
carrier waves are suppressed and a double sideband (DSB) Is obtained.
(23)
Symmetry
(Pull-0n)NariabIe
Variable
(outer
knob):
This is used to adjust the burst/sweep time contínuously in the range selected by
the TIME switch Turning the VARIABLE counterclockwise decreases the
time.
Symmetry
(pull-on)
(inner
knob):
Pull out to adjust the ON/OFF time for a burst and sweep time (both ways). When
this
knob
is
pushed
in,
the
time
ratio
is
50:50.
Í
i
í?
i
s‘xuwak-e ,, ya”? “- «Types,»
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2)
Rear
Panel
Features
Fig.
32. Rear Panel Features
(24)
GCV
OUT
Terminal
This terminal outputs a DC voltage in proportion to the oscillation frequency. The output
impedance
is
about
600
ohms
and
the
output
voltage
is
O
to
:i:
SV
(with
the
FRED.
dial
set
to
in
the
frequency
range
selected
by
the
FREQ.
RANGE
control
(25)
SWEEP
OUT
Terminal
This
terminal
is
used
for
swee
p generator output. The output time and symmetrv can
be
adjusted
by
using
the
TIM
E switch (21) and SYMMETRYNARIABLE control
“10*

i
(26)
SWEEP/BURST
GATE
OUT
Terminal
.
.
This is the gate signal (TTL level) output terminal for the sweep/burst mode
Fig. 3-3. shows the relationship between signals and time.
SWEEP/BURST GATE OUT mr
swap
oum‘
wavefom
WW
Burst waveform
PMA/WW
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I
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I
I
I
I
l
l
I
I
I
I
I
I
l
SWEEP
OUT
Fig. 3-3.
(27) VCG IN Terminal
This is input terminal used to extemally control the frequency of the output from terminals
(9)and(12).
A
negative
voltage
applied
to
this
terminal
decreases
the
frequency,
and
a
positive
voltage
increases
it.
With
the
FREQ.
dial
set
to
"1
O”,
negative
voltage
is
applied
to
decrease
the
frequency
to
111000
(maximum
frequency
ratio).
The
maximum
input
voltage
is
+
10V
(AC
+
DC).
(28) Puse Holder
Proper ampere fuse must be in compartment.
(29)
Voltage
Selector
Proper
line
voltage
must
be
selected
where
this
generator
is
used.
(30) Receptable for AC Une Cable
(31)
Grounding
Terminal
This
is
connected
to
the
main
frame.

«desgaste.-
«ï‘
n
3.
OPERATING
INSTRUCTIONS
1) Operating Precautions
‘\ (1) Precautions for Input Voltage
All input and output terminals are connected for direct coupled circuitry. Do not apply
external
voltage
to
any
output
terminal.
The
output
terminal
(9)
provides
a
maximum
instantaneous
input
voltage
of
d:
SV
(AC+DC).
Consequently,
if
the
voltage
applied
to
the
terminal
exceeds
this
value,
the
internal
circuitry
will
be
damaged.
,
Fig.
3-4.
Also
take
care
to
prevent
in
'
,
‘
put
voltage
exceedin
th
'
'
from being applied to the input terminals. Q e maXImum Input voltage vame
(2) Output Connections
Th ' ,
e output termrnal (9) has an output impedance of 50 ohms. Use a 50-ohm coaxial
Cable and a 50-0hIII tellllinat I I t O OH alld
or O he -
i
i
.
utput
to
Obtaln
the
proper
attenuati

2) Counter (INT/EXT)
FREO.
RANGE
1
51K.0
1
S
G x10 x100x
x1,
X13
OF xo. 1'>-X100K
xo.
01‘\
XM
FREQJSTOP
FREO.
ws
6.015
Fig. 3-6.
(1) Display Features
A. GATE indicator: Displays the opened or closed state of the GATE.
When gate is open, indicator willbe lit.
B. OVERFLOW indicator
C. KHz annunciator
D. Hz annunciator
E. GATE time selector switch (EXTERNAL COUNTER): 0.018, 0.1S, IS, 106 switch
selectable
(Z) Operating Characteristics
A. Internal counter: The Fig. 3-1 selectorswitch (14 J. )is generatorrangedfrequency
with the switch remained and reading.
B External counter: The Fig. 3-1 selector switch (14 J. )press the extemal frequen-
cy
to
the
ON
position.
C. External counter IN (15 BNC) characteristics
Gi. Frequency range: 0.1Hz to 10 MHz
Input sensitivity: 50mv rms
lmpedance: approx,1M9 less then 35pF
Max input voltage: 250V (DC+AC rms)
C-2.
GATE
time:
0.018,
0.18,
1S,
108
switch
selectable
0.018:
10
Hz
resolution
0.1S:
10
Hz
resolution
1S: 1 Hz resolution
108: 0.1 Hz resolution
I3)Waitabout20'rnlnr.rtesforcorractmeasurementuntilthe
stal
in cry ovengeneratorgets
-13-
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gle,
and
Square
Waves)
.
sino, triangle, or square waves continu-
ly are as follows.
3)
Basic
Signal
Generation
(Sine,
Trian
The panel control settings required to general:l
ously,
and
to
very
the
output
frequency
man
Panel
control
zevzting
MODE (5)
FUNCTION
(6)
NF,
N
mr
"Li
AM (16) OF . sea
SYMMETRY
(11)
Used
if
nace
ry
FRED.
RANGE
(2)
Desired
range
FREQ. DiAL (4) Desired posmon
DC OFFSET (7) Used if necessary
ATTENUATION
(8)
Desired
range
(1)
Sine
Wave
Output
The
Total
Harrnonic
Distortion
(T
HD)
of
the
main
eine
wave,
including
spurious
and
harrnonics,
i is less than 0.5% from 10 Hz to 50 kHz. The FUNCTION {U
modulation sine wave distortion is less than 2%
THD
from
10Hz
to
10kHz.
v
(Z)
Square
Wave
Output
The
RMS
value
of
a
symmetrical
(50%
duty
cycle)
square
waveform
is
equal
to
its
peak
value.
The
rise
or
fall
time
is
less
than
25
nano-
seconds
between
the
10%
and
90%
points
of
the
pp
output
square
wave.
The
aberrations,
FUNCTION
FLI
or deviations from the final settling amplitude
of the square wave after overshoot, will not
very
more
than
zi:
10%
of
the
final
value.
FUNCTION ’\/
I
l
I
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l
I
I
l
l
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I
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i
i
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I
i
(3)
Triangle
Output
SYNC
our
The RMS value of the triangle waveform is 0.557
times the peak value. The triangle ramp will not
deviate from a straight line any more than 1% Fig. all
of the total peak-to-peak value of the ramp.
Non-linearity
is,
therefore,
negligible.
(4) SYNC Output
The SYNC output supplies a one volt rectangular
wave
which
is
180°
out
of
phase
with
the
main
generator
output
signal.
The
leading
edge
and
the tiailing edge of the SYNC pulse occur at
the zero crossing point of the output waveform.
The frequency and duty c -
.
,
ycle
of
this
ulse
With
the
main
output
Signal.
P
very
-14‘

4) Trigger/Gate Modos
Set
the
panel
controls
as
fo||ows
to
use
the
trigger
or
gate
mode
for
signal
generation.
Panel
control
MODE (S)
FUNCTION
(6)
AM
(16)
SYMMETRY (1 1)
TRlG
START
LEVEL
(10)
FREQ. RANGE (3)
FRED. dial (4)
DC
OFFSET
(7)
ATTENUATION (8)
Setting
TRlG or GATE
Desired setting
OFF
Desired setting
Index
up
Desired
range
Desired position
Used
if
necessary
Desired range
By
using
these
settings
and
the
TTL
signal
input
to
ING
IN
one
of
the
wavaforms
shown
in
Fig.
3-8
is
output
to
the
OUTPUT
(9)
connector.
TR|G W
I
MODE: GATE E
’\/
FUNCTION
FUNCTION
’\/
FUNCTION ¡"LJ
MODE:
TRIG
FUNCTION
IV
l
g l
FUNCT|0N /\, u A i A
l
l
¡ |
I
l
I
l
Signal
geneiation
when
winner
inputisHl.
(Onegsnetauon'
más
atüiecompletimafonocyde.)
One-cycle
signal
generation
when trigger input has been
swnched
from
LO
to
Hi.
""WÏWW‘W
.,

e, the output signal frequency range from 0.1Hz to 1MHz and
ln the trigger or gate mod
is
DC
to
100kHz.
trigger
input
frequency
range
(TRIG
START
LEVEL
contro|)
Fig.
3-8
shows
the
output
waveforms
obtained
the middle. The TRlG START LEVEL is turned to a
TRIG IN l Il
:
TRIG
START
LEVEL
.
¡\
l
\
7’
FUNCTION
¡b
É
o
MODE
me
o
M
O‘
FR). 3«9.
with
the
TRIG
START
LEVEL
noi
set
¡n
djust the level to start signal generation.
Fig.
3-10
shows
the
waveform
‘16-

Panel
contro|
Setting
MODE
(5)
BURST
FUNCTlON
(6)
r\,
.
N
,
or
rLu
AM
(16)
OFF
SYMMETRY (1 1) Pushed in
FREQ. RANGE (3) Desired range
FREQ.
dia|
(4)
Desired
position
DC
OFFSET
(7)
Used
if
necessary
TRIG
START
LEVEL
(10)
Index
up
SET
START/SWEEP
(19)
SWEEP
(
J.
)
TlME
(21)
Desired
range
SYMMETRYNARIABLE
(23)
Desired
position
ATTENUATlON
(8)
Desired
range
SYMMETRY
(FULL
om
SWEEP/BURST m VAR'ABLE
GATE
om
©
É E : SYMMETRY knob
lil '|ll Ü TI =Tz
Burst
wave
output
¡V
UWVH
—.
Pull
and
turn
n.
mmm“ ¡ . ‘, Ü" Ratio Tun is ediusted.
|ll
ll
5
'n
VARIABLE
knob:
i
g
Il
Turn
clockwise
to
amm
'¡4————-—————'1 T Rima) becomes shortsr,
Turn
counterclockwise
to mcreese T (time).
Fig. 3-9 shows an output burst waveform. The trigger start level can be ‘
cha
the same procedure es in Trigger/Gate Modas. nged by usnng
6)
SWEEP
Modo
The sweep mode alloWs a linear or logarithmic sweep to be m
‘ ._ . ade at a swee
1.100
in
a
specified
frequency
range.
The
sweep
time
can
be
set
from
1m.«:)tlt>at160:f
1
to
the
START/MOD
LEVEL
control
(20)
to
set
the
sweep
start
frequency
and
th
'
UZ”
(4)
to
set
the
sweep
end
frequency.
e
FREQ'
dm
The
panel
contro!
settings
for
the
sweep
mode
are
as
fo||ows.
-17-
"WM-J"
““WW
A
.M .
-t ,.. a.
Í
2

The panel control setting used to output DC voltage
Panel control
FUNCTION
(6)
FREO.
RANGE
(3)
DC
OFFSET
(7)
ATTENUATION
(8)
only
are
as
follows.
Setting
All
buttons
released
(Push all buttons out.)
Range
of
x
100
or
less
Pull
the
knob
OdB
A max. of :1OOCV output can be obtained at an open output terminal by adjustirtg the
DC OFFSET knob. Because the output impedance is set to SO ohms, the relationshrp bet-
ween
the
output
voltage
and
max.
load
current
is
as
shown
In
Fig.
3-15.
10
When
max.
output
is
10V.
9)
Amplitude
Modulation
DC to 1MHz. The maximum input v
The
input
impedance
is
about
10
k
modulation ara as fo||ows.
Panel
control
MODE (5)
FUNCTION
AM (16)
SYMMETRY (1 1)
FREQ.
RANGE
(3)
FREO. dial (4)
DC
OFFSET
(7)
AM
CARRIER
LEVEL
(22)
MOD LEVEL (20)
100
Max.
load
current
(mA)
Fig.
3-15.
The modulation signal frequency ranges from
oltage
required
for
full
(100%)
modulation
is
5Vp-p.
ohms. The control panel settings used for amplitude
Pressed
Desired
range
Desired
position
Used if necessary
Desired
level
Desired modulation level
‘
20-
¿a

"EmaX'Eo
E
x
1
OO
=
percent
modulation
o
H
ll
_
:IlIHHHHHHHHHHHHHH HHHHH HHHHHHHHHHHHHHIIIHlunlIlIIHHHH
HHHHHHHHH HHHH
HH
IHIII||""H“"""""H
H
HH
HH
mv \
AVERAGE AMPLITUDE
Fig.
3-16.
FULL
CARRIER
SUPPRESSED
CARRIER
Partially Suppressed
0%
Modulation
Carrier
No
Modulation
HHHHHHHHHHHHHHHHHHE
lllllllllllllllllll
Fully
Suppressed
.
Carrier
50%
Modulation
No
Modulation
CD M
Unsuppressed Carrier
with
Modulation
100%
Modulation
m
Partially Suppressed
Carrier
with
Same
Modulation
Ovarmodulation
WWW
Fully Suppressed
Carrier
with
Same
Modulation
Modulation = B + A or ¿B-
2
A
Fig.
3-17.
AM
modulation
and
suppressed
carrier
waveforms.
If
the
AM
CARRIER
LEVEL
(22)
is
turned
around
the
middle
a
double
sideband
with
a
suppressed
carrier
is
obtained.
HHHHHHHHHHHHHH 'H‘HHHHHHHHHHHH "“HHHHHHH
Barbie-sideband output waveform
Fig. 3-13.
-21-
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A,
-W._...__,._«._.__r..
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