NF WF1973, Инструкция по эксплуатации

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4.7 Modulation Setting and Manipulation
79
WF1973/WF1974
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 to
pp. 70 and 72.
a) AM example
The amplitude of the output signal grows larger when the modulation signal swings to the
positive side.
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
×
(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.
Modulation sync signal
(during internal modulation)
Modulation signal
Output signal
Amplitude setting value (Vp-p) / 2 x
(1 + modulation depth (%) / 100) Amplitude setting value (Vp-p) / 2 x
(1 – modulation depth (%) / 100)
Select [AM] in
[Type] and then
press the ENTER
key