YOKOGAWA FG420 - Setting DC Offset Modulation

85
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
0V
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