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. P ress
“
MOD
”
key to select outer-modulation mode, and
“
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 depth
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 modulation
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, the
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 band.
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 the sa me 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 0.1s, take the following
operations:
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 keys of
“
f
0
”
,
“
f
1
”
,
“
∆f
”
,
“
∆t
”
to stop sweeping, p ress
“
%/S
”
key to pause, then, the screen displays the frequency of t he
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 finishing
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 default value (F=1KHz, V=1V, DC offset=±0.15V, 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
：
