Ceyear 4456 Series, User Manual

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Chapter XIV Waveform Generator (Option)
187
The FM is an abbreviation for frequency modulation, which means that the frequency of the carrier signal will
change linearly with the amplitude of the modulation signal.
Fig. 15.26 Frequency modulation
Click [Deviation] menu key to set the FM deviation through the Multipurpose b or numeric keypad, with the value
range of 0 ~ carrier frequency (the output after modulation will not exceed the max. output frequency).
FSK
The FSK, the short for frequency shift keying, means that the frequency of the output waveform will change with
the change of the modulation signal. When the modulation signal is 1, the output frequency will be 1, and when
the modulation signal is 0, the output frequency will be 2.
Fig. 15.27 Frequency Shift Keying
Click [Hopping] menu key to set the FSK Hopping Frequency through the Multipurpose b or numeric keypad,
with the value range as follows: Sine: 100 mHz ~ 25 MHz; Square/Arbitrary: 100 mHz ~ 10 MHz; Ramp/Built-in:
100 mHz ~ 1 MHz.
15.2.2 Frequency/FSK Rate
Click [FM] menu key to set the AM and FM Frequency through the Multipurpose b or numeric keypad, with the
value range of 100 mHz ~ 50 kHz.
Click [FSK Rate] menu key to set the FSK Rate through the Multipurpose b or numeric keypad, with the value
range of 100 mHz ~ 1 MHz.
15.2.3 Shape
Click [Shape] menu key (FSK modulation waveform is Square, this option is unavailable), and pop up the Shape
option menu:
Fig. 15.28 Shape Option Menu