Modulation EN 8.5.1 Select ASK modulation Press [Mod] > Type > ASK softkey to enable this function. ⚫ When Mod is enabled, Sweep or Burst will be disabled automatically. ⚫ After ASK is enabled, the instrument will generate ASK waveform with the currently specified carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation after configuring the other modulation parameters. 8.5.2 Carrier Waveform Shape ASK 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.
8.5.3 Carrier Waveform Amplitude After selecting the carrier waveform, press [Setting] > Amplitude softkey on the front panel, use the numeric keypad or direction keys and knob to input the desired amplitude. The amplitude range is limited by frequency. Please refer to the "Output Characteristics" described in Specifications. 8.5.4 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 amplitude "shifts" between "carrier amplitude" and "modulating amplitude" is determined by "ASK Rate".
external Source When external modulation source is selected, the generator receives the external modulating signal from the [FSK/Trig/Sync/Extmod] connector on the rear panel. Note: The [FSK/Trig/Sync/Extmod] connector is different when controlling ASK and AM/FM/PM modulations externally. HDG3000B User manual Copyright © Qingdao Hantek Electronics Co., LTD 44