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IM FG410-01EN

4.7.10 SettingDCoffsetmodulation

DC offset varies according to the instantaneous value of the modulation signal.

For the manipulation methods that are common with the modulation setting screen, refer to p.74

and p.76 .

a) DCoffsetmodulationexample

DC offset of the output signal grows larger when the modulation signal swings to the positive side.

DC offset setting ± peak DC offset deviation

Modulation sync signal

(during internal modulation)

Output signal

Modulation signal

b) SelectingDCoffsetmodulation

When [Mode] (oscillation mode) is set

to [Modulation] (modulation), set [Type]

(modulation type) on the 2nd page

of the setting screen to [OFSM] (DC

offset modulation).

c) WaveformsforwhichDCoffsetmodulationisnotpossible

None. DC offset modulation is possible for all waveforms.

d) SettingitemsrequiredforDCoffsetmodulation

Set [Offset] (carrier DC offset) on the 1st page of the setting screen.

Set [Deviation] (peak DC offset deviation) on the 2nd page of the setting screen.

The output DC offset varies in the range of carrier DC offset setting ± peak DC offset deviation.

If [Source] (modulation source) is set to [Int] (internal), set [ModFctn] (modulation waveform) and

[ModFreq] (modulation frequency).

If [Source] (modulation source) is set to [Ext] (external), input the modulation signal to the external

modulation/addition input terminal. In the case of ±1 V input, the prescribed peak DC offset

deviation results.

Select [OFSM] in

[Type] and then

press the ENTER

key.

4.7 Modulation Setting and Manipulation

YOKOGAWA FG420 User Manual

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