NF WAVE FACTORY WF1967, Инструкция по эксплуатации

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4.7 Setting and Operation of Modulation
WF1967/WF1968
4-68
4.7.9 Setting AM (DSB-SC)
The output amplitude changes according to the instantaneous value of modulation signal. AM without
carrier frequency element.
DSB-SC is abbreviation of Double Side Band - Suppressed Carrier.
For the modulation setting screen and the common operation method, please refer to P.4-55, P.4-58
a) AM (DSB-SC) example
The amplitude of output signal increases when the absolute value of the amplitude of modulation
signal is large. The polarity of the output signal reverses when the modulation signal is negative.
b) To select AM (DSB-SC)
c) Waveform where AM (DSB-SC) is unavailable
AM (DSB-SC) cannot be performed with DC.
Amplitude sweep cannot be performed with AM (DSB-SC).
d) Setting items necessary for AM (DSB-SC)
Set the carrier amplitude [Amplitude] on the first page of the setting screen.
Set the modulation depth [Depth] on the second page of the setting screen.
The output amplitude changes within the range of the carrier amplitude setting value (Vp-p) x
modulation depth (%) / 100.
When the modulation depth is 100%, the maximum value of the output amplitude envelope is equal
to the carrier amplitude setting value.
When the modulation source [Source] is internal [Int], set the modulation waveform [ModFctn],
modulation frequency [ModFreq], and modulation phase [ModPhs]. Internal [Int] cannot be
selected during sweep oscillation mode.
When the modulation source [Source] is external [Ext], enter the modulating signal to the external
modulation/addition input terminal. It is at the specified modulation depth when ±1V is entered.
Select [AM(SC)] in the modulation type setting menu
Set the modulation type [ModType] to
AM(DSB-SC) [AM(SC)] on the second page of
the setting screen when the oscillation mode
[Mode] is set to modulation [MODU] and on the
third page of the setting screen when the mode is
burst [BURST] or sweep [SWEEP].
Modulation sync signal
(during internal modulation)
Modulation signal
Output signal
Amplitude setting value (Vp-p) × Modulation depth (%)/100