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Figure 2-25 FSK Waveform Parameter Value Setup Interface
Table 2-16 FSK Parameter Setup Menu Description
Functional
menu
Setup
Description
Types
FSK
Select FSK
Signal source Internal/external
Select internal modulation/external modulation
Internal
modulation
Frequency
Set modulation wave frequency (2mHz~1MHz)
Hop frequency
The modulating signal of internal modulation is a 50%
duty cycle square wave. Set hop range (not exceed
carrier frequency)
External
modulation
Hop frequency
When the external modulation is selected, the
modulation signal is input by the [FSK] on the rear
panel. Only Hop Frequency parameters need to be set.
2.2.6 Phase Shift Keying (PSK)
PSK modulation is to shift its output phase between ET3325 preset values (Carrier Phase and
the Modulation Phase). The phase at which the output shifts between carrier phase and
modulation phase is called PSK phase. The frequency at which the output shifts between these
ET3325 phases is determined by the internal frequency generator or the signal level on the
rear-panel [Ext Trig] connector.
When the internal modulation is selected, the frequency at which the output shifts