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IM FG410-01EN

4.7.8 SettingAM

The output amplitude changes according to the instantaneous value of the modulation signal.

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

and p.76 .

a) AMexample

The amplitude of the output signal grows larger when the modulation signal swings to the positive

side.

Modulation sync signal

(during internal modulation)

Output signal

Modulation signal

Amplitude setting value (Vp-p) / 2 x

(1 + modulation depth (%) / 100)

Amplitude setting value (Vp-p) / 2 x

(1 – modulation depth (%) / 100)

b) SelectingAM

When [Mode] (oscillation mode) is set

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

(modulation type) on the 2nd page of

the setting screen to [AM] (AM).

c) Waveforms for which AM is not possible

AM is not possible for DC.

d) SettingitemsrequiredforAM

Set [Amptd] (carrier amplitude) on the 1st page of the setting screen.

Set [Depth] (modulation depth) on the 2nd page of the setting screen.

The output amplitude varies in the range of carrier amplitude setting value (Vp-p) / 2 x (1 ±

modulation depth (%) / 100).

When the modulation depth is 0% or the modulation is stopped, the output amplitude is 1/2 of that

during continuous oscillation.

When the modulation depth is 100%, the maximum output amplitude envelope value is equal to the

carrier amplitude setting value.

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 modulation depth

results.

Select [AM] in

[Type] and then

press the ENTER

key

4.7 Modulation Setting and Manipulation

YOKOGAWA FG420 User Manual

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