NF WAVE FACTORY WF1967, Instruction Manual (Operations, Page: 112 / 330

4.7 Setting and Operation of Modulation
WF1967/WF1968
4-62
4.7.5 Setting FSK
A binary frequency deviation modulation that output frequency is switched between the carrier
frequency and the hop frequency according to the modulating signal.
For the modulation setting screen and the common operation method, please refer to P.4-55, P.4-58
a) Example of FSK
The phase continuity of output signals is maintained though the frequency changes abruptly.
b) To select FSK
c) Waveform or mode where FSK is unavailable
Noise, pulse, and DC cannot perform FSK.
FSK cannot be used in sweep oscillation mode and burst oscillation mode except auto burst.
Setting FSK will force quit the Synclator function.
d) Setting items necessary for FSK
Set the carrier frequency [Freq] on the first page of the setting screen.
Set the hop frequency [HopFreq] on the second page of the setting screen.
The carrier frequency and the hop frequency appear alternately in the output frequency.
When the modulation source [Source] is internal [Int], set the modulation waveform [ModFctn]
and modulation phase [ModPhs]. Internal [Int] cannot be selected during sweep oscillation
mode.
Set the polarity of the trigger when the modulation source [Source] is external [Ext], and then
enter the modulation signal (TTL level) to the external trigger input terminal. When the polarity
is set as positive [High], the carrier frequency is output for low-level input, and the hop
Select [FSK] in the modulation type setting menu
Set the modulation type [ModType] to FSK
[FSK] 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 sweep [SWEEP].
Modulation sync signal
(during internal modulation)
Modulation signal
(during external modulation,
positive polarity)
Output signal
Hop frequency
Hop frequency
Carrier
frequency