YOKOGAWA FG400, User Manual

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72
4.
BASIC OPERATION
IM FG410-01EN
4.7.3 Common modulation settings and manipulations
This subsection describes the settings and manipulations that are common to all types of
modulation.
a) To set the oscillation mode to modulation → Oscillation mode setting
On the Oscillator setting screen, set
[Mode] (oscillation mode) to [Modulation].
This changes the mode to the modulated
oscillation mode.
In the modulated oscillation mode, the
setting screen consists of two pages,
which can be toggled with the
NEXT
key.
b) To select the modulation type → Modulation type setting
The following eight modulation types can be selected in [Type] (modulation type) on the 2nd
page of the setting screen.
• FM[FM]
)
p. 75
• FSK[FSK] ) p. 76
• PM[PM] ) p. 77
• PSK[PSK] ) p. 78
• AM[AM]
)
p. 79
• AM(DSB-SC)[AM(SC)] ) p. 80
• DC offset modulation [OFSM]
)
p. 81
• PWM[PWM] ) p. 82
c) To set the carrier condition
Set the various parameters of the carrier signal on the 1st page of the setting screen.
d) To set the modulation width
The modulation width setting is done on the 2nd page of the setting screen. The item name
that is displayed is either [Deviation], [Depth], or [HopFreq], depending on the modulation
type.
For details, refer to the description of each modulation type.
e) To perform modulation with the internal signal source
Set [Source] (modulation source) on the 2nd page of the setting screen to [Int] (internal).
[ModFctn] (internal modulation waveform) and [ModFreq] (internal modulation frequency)
must also be set.
[ModFctn] (internal modulation waveform) can be selected from the following seven choices.
• Sine [Sine]
• Square (50% duty) [Square]
• Triangle (50% symmetry) [Triangle]
• Rising ramp [UpRamp] • Falling ramp [DnRamp]
• Noise [Noise]
• Arbitrary [ARB]
Select
[Modulation] in
[Mode] and then
press the
ENTER key
NEXT
Modulation type