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IM FG410-01EN

4.7.4 SettingFM

TThe output frequency 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) FMexample

Frequency shifting of the output signal grows larger when the modulation signal swings to the

positive side.

Modulation sync signal

(during internal modulation)

Modulation signal

Output signal

b) SelectingFM

When [Mode] (oscillation mode) is set

to [Modulation], set [Type] (modulation

type) on the 2nd page of the setting

screen to [FM] (FM).

c) Waveforms for which FM is not possible

FM is not possible for noise, pulse wave, and DC.

d) SettingitemsrequiredforFM

Set [Freq] (carrier frequency) on the 1st page of the setting screen.

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

The output frequency varies according to the range of carrier frequency ± peak frequency 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 frequency

deviation results.

Select [FM] in

[Type] and then

press the ENTER

key.

4.7 Modulation Setting and Manipulation

YOKOGAWA FG420 User Manual

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