Modulation EN 8 Modulation HDG3000B supports AM, DSB-AM, FM, PM, 2ASK, 2FSK, 2PSK, BPSK, QPSK, 3FSK, 4FSK, OSK and PWM modulations. It can output modulated waveform from a single channel or from two channels at the same time. The modulated waveform consists of carrier waveform and modulating waveform. The carrier waveform can be Sine, Square, Ramp, Pulse, Arbitrary waveform (except DC) or Harmonic. The modulating waveform can be from internal (default), other channel, or external modulation source. 8.1 AM Modulation A modulated waveform consists of a carrier waveform and a modulating waveform. In AM, the carrier amplitude is varied by the voltage level of the modulating waveform.
8.1.1 Select AM Modulation Press [Mod] > Type > AM softkey to enable AM function. ⚫ When Mod is enabled, Sweep or Burst will be disabled automatically. ⚫ After AM is enabled, the instrument will generate AM waveform with the currently specified carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation after configuring the other modulation parameters. 8.1.2 Carrier Waveform Shape AM 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 shape. ⚫ Noise and DC could not be used as carrier waveform.
8.1.3 Carrier Waveform Frequency For different carrier waveforms, the settable range of carrier frequency is different. Please refer to "Frequency Characteristics" in Specifications. The default value is 1kHz. Press [Setting] > Frequency softkey on the front panel, and then use the numeric keypad or direction keys and knob to input the desired frequency value. 8.1.4 Modulation Source Press [Mod] > SignalSrc softkey to select internal, external or another ch as the Copyright © Qingdao Hantek Electronics Co., LTD HDG3000B User manual 35