YOKOGAWA FG420 - Setting FM

79
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