4.7 Modulation Setting and Manipulation
75
IM FG410-01EN
4.7.4 Setting FM
The 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
pp. 70 and 72.
a) FM example
Frequency shifting of the output signal grows larger when the modulation signal swings to
the positive side.
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.
Modulation sync signal
(during internal modulation)
Modulation signal
Output signal
Select [FM] in
[Type] and then
press the ENTER
key
