Victor VC2003 User manual

1
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIRECT
DIRECT
DIRECT
DIRECT
COMPOSITE
COMPOSITE
COMPOSITE
COMPOSITE
FUNCTION
FUNCTION
FUNCTION
FUNCTION
GENERATOR
GENERATOR
GENERATOR
GENERATOR
OPERATION
OPERATION
OPERATION
OPERATION
MANUAL
MANUAL
MANUAL
MANUAL
1.
1.
1.
1.
GENERAL
GENERAL
GENERAL
GENERAL
The instrument is a DDS digital direct composite function generator. It is cored by CPU, employs many large scale integrated circuits, it has the following features:
(1) High precise for frequency, high stability.
(2) Purity waveform, small distortion.
(3) Non-transition process, fast frequency change-over time :can be stable instant
(4) Non-limitation on ranges :unnecessary to changes ranges, frequency covering factor can be 10
8.
(5) Sweeping characteristics :many kinds of sweeping modes are selectable and can pause randomly, LED will display the current frequency value; can sweep meticulously o n
narrow band; can set initial frequency, terminal frequency, sweeping steps and time interval.
(6) Modulation characteristics :it has amplitude modulation function, the modulation signal can be generated by either inner signal source or outer input, the depth is adjusted
and will not be effected by carrier wave frequency and output amplitude.
(7) Convenient keyboard operation.
(8) Stability and reliability.
2.
2.
2.
2.
TECHNICAL
TECHNICAL
TECHNICAL
TECHNICAL
DATA
DATA
DATA
DATA
AND
AND
AND
AND
SPECIFICATON
SPECIFICATON
SPECIFICATON
SPECIFICATON
2-1.
2-1.
2-1.
2-1.
W A VEFORM
W A VEFORM
W A VEFORM
W A VEFORM
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
sine-wave, TTL level square wave
waveform amplitude resolution: 10bit
sine wave harmonic distortion: -40 dBc (frequency <1M Hz ), -30 dBc (frequency ≥1M Hz )
sine wave THD : < 1% (high resistance, 1KHz)
TTL level square wave rise time: ≤20ns
Square wave overshoot: ≤5%
2-2.
2-2.
2-2.
2-2.
FREQUENCY
FREQUENCY
FREQUENCY
FREQUENCY
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
frequency range: 1Hz —— 3MHz
resolution: less than 1MHz : 0.01Hz ;1MHz and more than 1MHz: 0.1Hz
frequency tolerance: ≤ ± ( 5×10
-
5
+30Hz+1d )
frequency stability: ≤± 50ppm (- 40 ℃—— + 85 ℃) (use the low temperature drift crystal oscillator with P LL phase-lock circuit ). Custom-made can be done if frequency
stability requires to be ±20ppm or less.
2-3.
2-3.
2-3.
2-3.
AMPLITUDE
AMPLITUDE
AMPLITUDE
AMPLITUDE
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
amplitude range: 10mV
p-p
—— 16V
p-p
(high resistance
) ,
5mV
p-p
—— 8V
p-p
(50 Ω )
display: 3 digit s
amplitude error: ≤ ± (5%+100 mV
p-p
)(high resistance, 1KHz, 1 —16V
p-p
)
amplitude stability: ≤± 5% (1hr, high resistance, 1KHz,16V
p-p
)
flatness: ≤ ±
0.5dB
( ≤ 100KHz
)
,≤±
0.8dB
(100KHz —1MHz
)
,≤±
2dB
(1MHz —2MHz
)
,≤ ±
3dB
(2MHz —3MHz
)
,(less than 1Hz, the frequency amplitude i s unstab le
)
output impedance: 50 Ω(±10% )
TTL level output characteristic :low level: <0.3V ;high level: >4.2V (high resistance )
2-4.
2-4.
2-4.
2-4.
DRIFT
DRIFT
DRIFT
DRIFT
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
drift range: 0V —— ± 6.4V (high resistance
) ,
0V —— ± 3.2V (50 Ω)
resolution: 50mV (high resistance )
drift error: ≤ ± ( 5%+100mV
) (
1hr, high resistance, 1KHz, 10V
p-p
)
2-5.
2-5.
2-5.
2-5.
MODULATION
MODULATION
MODULATION
MODULATION
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
CHARACTERISTIC:
amplitude modulation: AM
modulate waveform
: (
interior amplitude modulation )sine wave: 400Hz ±10%, 1000Hz ±10% 2 ranges
modulation depth :1% —— 100%
modulation source :inner modulation source ,outer modulation source
outer modulation characteristic :input impedance :600 Ω
input level :the modulation depth is 50% at 0dB
input frequency response :100Hz —— 100KHz ( ± 3dB )

2
2-6.
2-6.
2-6.
2-6.
SWEEP
SWEEP
SWEEP
SWEEP
CHARACTERISTIC
CHARACTERISTIC
CHARACTERISTIC
CHARACTERISTIC
:
Frequency sweep mode : linearity, logarithm
During frequency sweep, the frequency and amplitude value will be displayed synchronistically, and can stop at any sweeping point. It will go on sweeping or restart after pausing.
sweep rate :0.02s —— 5s/ step ,5-digit can be set
logarithm sweeping characteristic: 100 points per 10 times frequency ranges
2-7.
2-7.
2-7.
2-7.
DISPLAYING
DISPLAYING
DISPLAYING
DISPLAYING
:
8-digit LED displaying with
F
,
V
, AM, SWEEP
,
MHz
,
KHz
,
Hz, %/s indicator and every range
2-8.
2-8.
2-8.
2-8.
POWER
POWER
POWER
POWER
SOURCE
SOURCE
SOURCE
SOURCE
:AC 220V/110V ±10% ,frequency :50Hz/60Hz ±5%
2-9.
2-9.
2-9.
2-9.
AMBIENT
AMBIENT
AMBIENT
AMBIENT
TEMPERATURE
TEMPERATURE
TEMPERATURE
TEMPERATURE
AND
AND
AND
AND
HUMIDITY
HUMIDITY
HUMIDITY
HUMIDITY
:0—— 40 ℃
,
30% —— 70% RH
2-10.
2-10.
2-10.
2-10.
DIMENSION
DIMENSION
DIMENSION
DIMENSION
:270mm ×215mm ×100mm
2-11.
2-11.
2-11.
2-11.
WEIGHT
WEIGHT
WEIGHT
WEIGHT
:1.9 kg
3.
3.
3.
3.
PANEL
PANEL
PANEL
PANEL
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
see
see
see
see
the
the
the
the
fig.
fig.
fig.
fig.
3-1. DISPLAYING AREA: the displaying area consists of 8 LED-indicators and 8 LED-displays, see the fig.
1. <F> frequency indicator 2. <V> voltage indicator 3. <AM> modulation indicator 4. <Sweep> sweep indicator 5. <MHz/V> MHz or V unit indicator
6. <KHz/mV> KHz or mV unit indicator 7. <EXT/LOG> indicator for outer modulation and logarithm sweep 8. <Hz%/S> Hz or second (S)unit or modulation
depth indicator (%)9.LED displaying
3-2. FUNCTION KEY AREA :it consists of 14 keys. See the fig.

3
1. < ◄ > blinking bit shifts left 2.< ☼ > blink a c tivation key 3. < ► > blinking bit shifts right
4. < +> blinking number increase and positive level DC offset 5. < -> blinking number decrease and negative level DC offset 6. <F> frequency setting displaying
key 7 .<V> voltage setting displaying key 8. <MOD> functional mode selector 9. < ∆ f> spacing frequency key
10. < f
0
> 400Hz inter-modulation signal and sweeping initial frequency setting key 11. < f
1
> 1000Hz inter-modulation signal and sweeping terminal frequency setting key
12. < ∆ t> frequency sweep time interval setting key 13. <%> modulation depth setting key 14. <RST> reset key
3-3. NUMBER KEY AREA :consists of 15 keys, see the fig.
Among them, there are 10 number keys: “.”Decimal point key
,
“C”backspace key , “ MHz/V ”MHz or V unit key
,
“KHz/mV ”KHz or mV unit key
,
“Hz/%/S ”Hz unit
key or modulation depth % or S unit key
3-4. TERMINAL DESCRIPTION :
TERMINAL 1 (EXT )outer-modulation signal input terminal ;TERMINAL 2 TTL level square wave output terminal ;TERMINAL 3 . sine wave output terminal
3-5. REAR PANEL DESCRIPTION :SEE THE FIG.
1. POWER SWITCH 2.220V/110V SWITCHER 3. POPWER SOCKET AND FUSE BOX (0.5A )
4.
4.
4.
4.
DIRECTIONS
DIRECTIONS
DIRECTIONS
DIRECTIONS
FOR
FOR
FOR
FOR
USE
USE
USE
USE
:
4-1.
4-1.
4-1.
4-1.
START-UP
START-UP
START-UP
START-UP
:

4
Firstly, check if the voltage and frequency of the power can match the instrument, and set the AC 220V/110V switcher to a correct position, then, plug in the power cord, turn on
the power
,
LED will display the
model
“2003
”
,
after 2 seconds, the instrument goes into operating mode.
We
suggest that before operation, the instrument should be preheated f or
3 0 minutes.
4-2.
4-2.
4-2.
4-2.
DATA
DATA
DATA
DATA
INPUT
INPUT
INPUT
INPUT
:
There are two ways for data input: 〈1
〉
digital input: input by number keys from right shift to left shift, if exceed the resolution, input can not be done. If the data is out of scope, wi ll
output the proximal data. If wrong input, press “C”to clear the final bit, then ,input correct data. When finishing input, only when unit is input, will the data be input into the
instrument. During this procedure, the output signal is still output according to the previous data output. The way is suitabl e for the input of random value. 〈2〉data modification: to
active the digit by “☼
”
key in the function area
,
press “◄
”
and “►
”
key can change the digit needed to be modified; press “ +
”
or “ -
”
key to increase or decrea se da ta .
To
cancel the mode, press “☼”key again. During this procedure, the output varies continuously. The way is suitable for modifying and input proximal data.
4-2-1.FREQUENCY
4-2-1.FREQUENCY
4-2-1.FREQUENCY
4-2-1.FREQUENCY
SETTING
SETTING
SETTING
SETTING
Press “F”key in the function area, the indicator will light, and the current output frequency value will be displayed on LED. If want to change frequency, input frequency value
directly, during input, the previous frequency will not be changed. If the input data is over 8-digit or over scope, the proximal frequency will be set. If wrong input, if do not input unit,
the data can be modified.
To
keep the original data, press “F”key.
When the input frequency value is close to the primary one, press “☼”key to active the final bit so long as the current displaying is frequency value, and it is unnecessary to
press “F”
key.
Press “◄”or “►”key can select the digit needed to be modified, press “+”or “-”key can increase or decrease the value and can increase or decrease bit
continuously. The frequency of the output signal is in synchronism with that of displaying and will not be interrupted.
For example, if output a signal of 3.5KHz
,
take the following operation:
press “F”key ,then, press “3”,“.”,“5”,“KHz/mV ”in turn
If output a signal of 0.56MHz
,
take the following operation:
press “F”
key,
then, press “0”,“.”,“5”,“6”,“MHz/V ”in turn; It
is
the same to press “5”,“6”,“0”,“KHz/mV ”.
4-2-2.
4-2-2.
4-2-2.
4-2-2.
AMPLITUDE
AMPLITUDE
AMPLITUDE
AMPLITUDE
AND
AND
AND
AND
DC
DC
DC
DC
OFFSET
OFFSET
OFFSET
OFFSET
SETTING
SETTING
SETTING
SETTING
:
Press
“V
”
key in the function area, and the indicator lights, the current output amplitude value will be displayed on LED, the value is the peak-peak value on high resistance load. If
t
he
load is 50 Ω,the actual output peak-peak value of the voltage is just a half of this value.
You
can input directly by number keys and vernier control by function keys, the concrete
operation is similar to frequency input.
For example, if want to output a signal with amplitude 10V
P-P
Press “V”
key,
then, press “1”,“0”,“MHz/V ”key in turn.
If there is a certain DC video component in the output AC signal, i.e., need to DC offset or drift, press “V
”
key in function area, then, “ +
”
or
“ -
”
key,
input the polarity of D CV
which needed to be offset, and the LCD will display “P—***
”
,it refers to the current DC drift rate (high resistance), thence, input the DCV value needed to be offset.
For example, if the output signal drifts +2.5V
Press “V”key and then “+”
key,
input “2”,“.”,“5”,“MHz/V ”in turn.
Every time, when turn on the power or reset, the DC drift will be the default value
0V.
4-2-3.
4-2-3.
4-2-3.
4-2-3.
MODE
MODE
MODE
MODE
SETTING
SETTING
SETTING
SETTING
:
The “MOD ”selector can select output mode, in turn, there is
:
COMMON
*
→INNER- MODULATION →OUTER- M ODULATION →LINEARITY FREQUENCY SWEEP →
LOGARITHM FREQUENCY SWEEP →COMMON →… recycled ,see the fig.
4-2-3-1.
4-2-3-1.
4-2-3-1.
4-2-3-1.
COMMON
COMMON
COMMON
COMMON
MODE
MODE
MODE
MODE
:it refers to the mode only set “F”and “V”
,
and it is the default mode for the instrument. 。
4-2-3-2.
4-2-3-2.
4-2-3-2.
4-2-3-2.
INNER
INNER
INNER
INNER
MODULATION
MODULATION
MODULATION
MODULATION
SETTING
SETTING
SETTING
SETTING
:
Press
“MOD
”
selector to select inner-modulation mode, “AM
”
indicator lights, the instrument is in inner-modulation mode.
Press
“F
”
key to set carrier wave;
press
“V
”
key to set the
amplitude of output signal; press “%
”
key to set modulation
depth
(modulation factor
)
. There are 2 modulation signals for inner-modulation: 400Hz and 1000Hz
,
press f
0
to sel ect
400Hz modulation signal ,the instrument displays “0—0.400kHz ,press f
1
to select 1000Hz modulation signal, the instrument displays “0—1.000kHz .
For example, if want to get a signal with carrier frequency 630KHz ,frequency of modulation signal is 1000Hz ,modulation depth is 30% and output amplitude is 2V
P-P
:
Press “MOD ”key to be into inner-modulation mode;

5
Press “F”key to set carrier frequency, input “6”,“3”,“0”,“KHz/mV ”in turn to set output frequency ;
Press “f
1
”key to set the modulation signal as 1000Hz ;
Press “%”key and input “3”,“0”,“%/S ”to set modulation depth ;
Press “V”key to set output amplitude, press “2”,“MHz/V ”in turn to set output amplitude, and it completes.
During operation, the sequence is random to set carrier frequency, amplitude, depth and modulation signal.
4-2-3-3.
4-2-3-3.
4-2-3-3.
4-2-3-3.
OUTER-MODULATION
OUTER-MODULATION
OUTER-MODULATION
OUTER-MODULATION
SETTING
SETTING
SETTING
SETTING
:
When the inner-modulation parameter can not meet the requirement, you can set the instrument to outer-modulation mode.
Press
“MOD
”
key to select outer-modulation mode, a nd
“AM
”
and “EXT/LOG
”
indicator light, the instrument is in outer-modulation mode. Input the outer-modulation signal from “EXT
”
terminal
;
Press
“F
”
key can set carrier wave
frequency
;
Press
“V
”
key can set the amplitude of the output signal
;
Due to the modulation depth relates to the magnitude of the outer-modulation signal, the inner- modulation de pth
setting will not take function. The basic setting is the same as that of inner-modulation, and it is unnecessary to set modulation depth and frequency of inner-modulation signal.
The seemly frequency of outer-modulation signal is between 100Hz —— 100KHz
,
the input impedance
for
“EXT
”
terminal is 600 Ω
,
when input signal is 0dB
,
the modulatio n
depth is 50%; when input signal is +6dB
,
the modulation depth is 100% ,the max. is approx.. 150%.
4-2-3-4.
4-2-3-4.
4-2-3-4.
4-2-3-4.
LINEARITY
LINEARITY
LINEARITY
LINEARITY
FREQUENCY
FREQUENCY
FREQUENCY
FREQUENCY
SWEEP
SWEEP
SWEEP
SWEEP
:
Press “MOD
”
key to select linearity sweep, and “Sweep
”
indicator light, the instrument is in linearity frequency sweep mode, press “f
0
”key to select initial frequency, then, th e
screen displays “0—******
”
;
press
“f
1
”
key to set terminate frequency, the screen
displays
“1—******
”
;
press
“∆ f
”
key to set spacing frequency, the screen
displays
“2—* *****
” ;
press
“∆ t
”
key to set sweep time interval
。
After finishing
setting
“∆ t
”
,
it begins to cycle sweep according to positive linearity. It is suitable for sweeping in a narrower frequency b and.
For example, if you want to sweep between 1KHz to 1.1Khz by the frequency step value of 1Hz
,
set the time interval as 1s:
press “MOD ”key to select linearity sweep mode ;
press “f
0
”key and “1”,“KHz/mV ”key to set initial frequency ;
press “f
1
”key and “1”,“.”,“1”,“KHz/mV ”key to set terminate frequency;
press “∆ f ”key and “1”
,
“Hz/%/S ”key to set sweep spacing frequency ;
press “∆ t ”key and “1”,“%/S ”key to set time interval ;and then, sweep begins.
4-2-3-5.
4-2-3-5.
4-2-3-5.
4-2-3-5.
LOGARITHM
LOGARITHM
LOGARITHM
LOGARITHM
FREQUENCY
FREQUENCY
FREQUENCY
FREQUENCY
SWEEP
SWEEP
SWEEP
SWEEP
:
Press
“MOD
”
key to select logarithm frequency sweep,
and
“Sweep
”
and
“EXT/LOG
”
indicator light, the instrument is in logarithm frequency sweep mode
,
press
“f
0
”
key to
set
initiate frequency
;
press
“f
1
”
key to set terminate frequency
;
press
“∆ t
”
key to set time interval. After finishing
setting
“∆ t
”
,
sweep begins . The setting way and displaying are
t
he sam e as
that of linearity sweep, and it is unnecessary to set “∆ f ”. It is suitable for sweeping in a wider frequency band.
For example, if want to make logarithm sweep between 20Hz and 20KHz
,
time interval is 0.1
s,
take the following
operation s :
Press “MOD ”key to select logarithm sweep mode ;
Press “f
0
”and press “2”
,
“0”,“Hz/%/S ”key to set initial frequency ;
Press “f
1
”key and press “2”,“0”,“KHz/mV ”key to set terminal frequency ;
Press “∆ t ”key and press “0”,“.”,“1”,“%/S ”key to set time interval, then, sweep begins.
EXPLANATION FOR FREQUENCY SWEEP :
No matter which mode the frequency sweep is in, press any key s of “f
0
”
,
“f
1
”
,
“∆ f
”
,
“∆ t
”
to stop sweeping,
press
“%/S
”
key to pause, then, the screen displays the freque ncy
of
the
pausing point, and will output this value. When press “%/S
”
key again, it will go on sweeping. If need to restart,
press
“∆ t
”
key and
then
“%/S
”
key.
The sweep begins with finis hing
input the unit of time interval “∆ t ”
,
so, time interval should be set lastly.
For
For
For
For
digital
digital
digital
digital
input
input
input
input
mode,
mode,
mode,
mode,
if
if
if
if
the
the
the
the
digit
digit
digit
digit
before
before
before
before
decimal
decimal
decimal
decimal
point
point
point
point
is
is
is
is
“
“
“
“
0
0
0
0
”
”
”
”
,
,
,
,
the
the
the
the
“
“
“
“
0
0
0
0
”
”
”
”
can
can
can
can
not
not
not
not
be
be
be
be
omitted.
omitted.
omitted.
omitted.
For any frequency output, TTL level square wave is in synchronism with sine output, and it is unnecessary to switch ranges; After power off or reset, the setting data on each
ranges become the defau l t value (F=1KHz,
V=1V,
DC offset= ± 0.15
V,
AM modulation frequency=400Hz, AM modulation amplitude m=50%, sweep initial frequency f
0
=1KHz, sweep
terminal frequency f
1
=10KHz, sweep interval frequency ∆ f =1KHz, sweep interval time ∆ t =1s).
5.
5.
5.
5.
NOTES
NOTES
NOTES
NOTES
:
5-1. There should not exist DC and high voltage and strong radiance signal on the load of the generator to prevent from damaging the instrument.
5-2. When the instrument appears the problem, such as un-normal displaying, breaking down. etc. just press reset key or turn off the power, the problem will be solved.
5-3. If there is a lower DC in load circuit or DC component is unnecessary
,
you can joint-connect a capacitor with proper capacitance and withstand voltage to interclude DC.
5-4.It
is
better not to connect a oversize load on TTL level output
,
otherwise, it will lead to wave form distortion, long rising time.
5-5. Do not expose the instrument to extremes of temperature and humidity, dusty place and strong radiance and electromagnetic interference environment, and avoid violent
shock.
6
6
6
6
.FUNCTIONAL
FUNCTIONAL
FUNCTIONAL
FUNCTIONAL
BLOCK
BLOCK
BLOCK
BLOCK
DIAGRAM
DIAGRAM
DIAGRAM
DIAGRAM
:

6
7.NOTES:
7.NOTES:
7.NOTES:
7.NOTES:
The
The
The
The
specification
specification
specification
specification
s
s
s
s
are
are
are
are
subject
subject
subject
subject
to
to
to
to
change
change
change
change
without
without
without
without
notice
notice
notice
notice
.
.
.
.
T
T
T
T
he
he
he
he
content
content
content
content
of
of
of
of
this
this
this
this
manual
manual
manual
manual
is
is
is
is
regarded
regarded
regarded
regarded
as
as
as
as
correct,if
correct,if
correct,if
correct,if
any
any
any
any
error
error
error
error
or
or
or
or
in
in
in
in
doubt,please
doubt,please
doubt,please
doubt,please
contact
contact
contact
contact
us.
us.
us.
us.
W
W
W
W
e
e
e
e
will
will
will
will
not
not
not
not
be
be
be
be
responsible
responsible
responsible
responsible
for
for
for
for
accident
accident
accident
accident
or
or
or
or
injury
injury
injury
injury
caused
caused
caused
caused
by
by
by
by
improper
improper
improper
improper
operation.
operation.
operation.
operation.
T
T
T
T
he
he
he
he
function
function
function
function
describe
describe
describe
describe
d
d
d
d
in
in
in
in
this
this
this
this
manual
manual
manual
manual
can
can
can
can
not
not
not
not
be
be
be
be
the
the
the
the
reason
reason
reason
reason
of
of
of
of
special
special
special
special
usage.
usage.
usage.
usage.
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