FUNCTION GENERATOR -SERIES
INSTRUCTION MANUAL
5-6.Variation of external voltage-controlled frequency
This mode of operation allows the user to adjust the frequency of the
function generator with an external DC control Voltage. It also provides
an easy way for your adjustment.
(1) Select Function
8
first, then select Range
7
, rotate FREQ
13
to
set required frequency range.
(2) Connect external control voltage (0±10V) to the VCF
21
connector
via a suitable lead, and generate signal from Output
22
.
(3) Other adjustments, such as AMPL
12
switch can change amplitude
of signal, or get attenuation; adjust Offset
for DC level, rotate Duty
‰ switch can change output signal of pulse or ramp waveform etc..
5-7.Auto Sweep
(1) First select the required waveform by pressing Function
8
button,
then select required frequency range by pressing range
7
push
button.
(2) Connect output terminal
22
to oscilloscope for observing output
signal.
(3) Rotate frequency
13
to determine the upper limit frequency.
(4) Pull out frequency
13
to perform auto-sweep operation.
(5) Rotate SWEEP/TIME
14
and SWEEP/RATE
16
to adjust sweep
time and rate.
(6) Pull out (press) LIN/LOG
14
to obtain LOG (LIN) sweep mode.
Note: The sweep width can only be adjusted during the
sweep cycle and it can not be sto pped.
FUNCTION GENERATOR -SERIES
INSTRUCTION MANUAL
5-8.AM/FM operation
(1) Select function
8
first; then select Range
7
, rotate FREQ
13
to
set required frequency range.
(2) Connect output terminal
22
to oscilloscope for observing output
signal.
(3) Press MOD
15
and pull out (press) MOD
16
to obtain FM/AM
modulation mode.
(4) Adjust MOD
16
to achieve required modulation ratio.
5-9. Precaution item
(1) Adjust DC OFFSET, will provide to change voltage of ±10V (no load)
or ±5V (50Ω load). However, signal added DC level, is still
limited to ±20V (no load) or ± 10V (50Ω load). In case of
over-voltage, clip will appear as shown in Figure 2:
(2) Output connector label 50Ω, indicated that signal source impedance is
50Ω. Connect to any of impedance circuit, but output voltage and
terminal impedance will be rated. To avoid oscillation, terminal shall
be connected to 50Ω (When using high frequency and square output),
and its connecting line shall be as short as possible.
(3) When adjust Duty knob to leftward position, the ratio of positive state
to negative state, expand to not less than 80:20. It can expand Square
wave to Pulse wave, expand Triangle wave to Ramp wave and Sine
wave to unsymmetrical Sine wave. As shown in Figure 3 is for
adjustment of Duty control to obtain required waveform.
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