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2) External Source
When modulation source is external, carrier waveform will be modulated by an external waveform. Carrier wave
phase will be output when external input logic is low, and modulation phase will be output when external input logic
is high.
PSK Rate Setting
When modulation source is internal, the moving frequency between carrier wave phase and modulation phase can
be set. After enabling PSK function, PSK rate can be set and the settable range is 2mHz to 100kHz, the default rate
is 100Hz. If need to change, press Carrier Wave Parameter
→Rate in turn.
Modulation Phase Setting
Modulation phase indicates the change between the phases of PSK modulated waveform and the phase of carrier
wave phase. Settable range of PSK phase is from 0º to 360º, and the default value is 0º. If need to change, press
Parameter
→Phase in turn.
Comprehensive Example
Make the instrument work in phase shift keying (PSK) mode, then set a sine wave with 2kHz and 2Vpp from the
internal of the instrument as a carrier wave signal, finally, make carrier wave phase and modulation phase move
between each other with 1kHz frequency. Specific steps are seen as following:
1) Enable Phase Shift Keying (PSK) Function
Press Menu
→Modulation→Type→Phase Shift Keying in turn to start the PSK function.
2) Set Carrier Wave Signal Parameter
Press Carrier Wave Parameter
→Type→Sine Wave in turn to select sine wave as carrier wave signal.
