Modulation EN 8.7 PSK Modulation Users can configure the instrument to "shift" its output phase between two preset values using PSK modulation. The rate at which the output shifts between the two phases (called the "carrier phase" and the "modulation phase") is determined by the internal signal level of the instrument or the signal level on the [FSK/Trig/Sync/Extmod] connector on the rear panel. 8.7.1 Select PSK Modulation Press [Mod] > Type > PSK softkey to enable PSK function. ⚫ When Mod is enabled, Sweep or Burst will be disabled automatically. ⚫ After PSK is enabled, the instrument will generate PSK waveform with the currently specified carrier and modulating waveforms.
To avoid multiple waveform changes, enable modulation after configuring the other modulation parameters. 8.7.2 Carrier Waveform Shape PSK carrier shape: Sine (default), Square, Ramp, Pulse, Arbitrary (except DC) or Harmonic waveform . ⚫ Press [Wave] button on the front panel to select the desired carrier waveform. ⚫ Noise and DC could not be used as carrier waveform. 8.7.3 Carrier Waveform Phase Press [Setting] > Phase softkey on the front panel and use the numeric keypad or direction keys and knob to input the desired phase. The available phase ranges from 0є to 360є and the default value is 0є.
8.7.4 Modulation Source Press [Mod] > SignalSrc to select Internal or External modulation source. internal Source When internal modulation source is selected, the modulating waveform is set as a Square with 50% duty cycle, and the rate at which the output phase "shifts" between "carrier phase" and "modulation phase" is determined by "PSK Rate". external source When external modulation source is selected, the generator receives the external HDG3000C User manual Copyright © Qingdao Hantek Electronics Co., LTD 48