GW Instek SFG-830 User Manual - Manual (Page 20)

SFG-830 p.17
e The input voltage of external modulation is -5V ~ +5V.
* If the input voltage is between 0V ~ +5V, the AM modulation will be the common
modulation.
* If the input voltage is between -5V ~ +5V, the AM modulation will be double sideband
suppressed carrier (DSBSC).
f SFG-830 can output waveform that is synchronized with its AM modulation signal. In the
above example, the Sweep/modulation output terminal on the rear panel will output the
waveform of SINE/100Hz.
g The compiling of arbitrary wave should be carried out via the communication interface.
Please refer to Example 2 in section 6.16.
6.12 Setup of FM Modulation
The FM modulation function offers sine, square, triangle, ramp, and arbitrary
signals.
n Select a waveform by [ ] or [ ] button in FUNCTION column.
o Use [ ] or [ ] button in SWEEP / MODULATION column to select a
modulation signal from sine, square, triangle, ramp, or ARB.
p Press [ FM ] button.
q Press [ RATE ] to set up sweep RATE/TIME (range 0.001Hz ~ 10kHz).
r Press [ SPAN ] to set the Frequency Span (0.001Hz~30MHz for sine and
square; 100kHz for triangle, ramp and arb).
s Press [ MOD ON/OFF] to start performing modulation.
™
Example of the Setup of FM modulation
To set the following conditions:
ΠMain waveform : sine. ΠSpan : 10kHz
ΠMain frequency : 100kHz. ΠModulation signal : sine/1kHz FM modulation.
Procedure:
n Use [ ] or [ ] button in FUNCTION column to select SINE waveform.
o Press [ FREQ ], [ 1 ], [ 0 ], [ 0 ], [ kHz ] buttons to set the frequency of the wave.
p Use [ ] or [ ] button in SWEEP/MODULATION column to select SINE
waveform.
q Press [ FM ].
r Press [ RATE ], [ 1 ], [ kHz ].
s Press [ SPAN ], [ 1 ], [ 0 ], [ kHz ] to set span.
t Press [ MOD ON/OFF ] to start performing modulation.
Note:
c Different sequence of the steps taken will not make any change on the execution and
the result.
d SFG-830 can output waveform that is synchronized with its FM modulation signal. In the
above example, the Sweep/modulation output terminal on the rear panel will output the
waveform of SINE/1kHz.
e The compiling of arbitrary wave should be carried out via the communication interface.
Please refer to Example 3 in section 6.16.