Modulation EN ⚫ Use the numeric keypad or direction keys and knob to input the desired rate value. ⚫ The rate range is from 2mHz to 1MHz and the default is 100Hz. Note: This menu will be grayed out and disabled when the external modulation source is selected. 8.5.6 Modulation Amplitude After enabling ASK modulation function, press [Mod] > Amplitude softkey to set the modulation amplitude. ⚫ Use the numeric keypad or direction keys and knob to input the desired amplitude value. ⚫ The range of amplitude (HighZ) is from 2mV to 20V and the default is 100mV. 8.6 FSK Modulation Users can configure the instrument to "shift" its output frequency between two preset values using FSK modulation.
The rate at which the output shifts between the two frequencies (called the "carrier frequency" and the "hop frequency") 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. 8.6.1 Select FSK Modulation Press [Mod] > Type > FSK softkey to enable FSK function. ⚫ When Mod is enabled, Sweep or Burst will be disabled automatically. ⚫ After FSK is enabled, the instrument will generate FSK waveform with the currently specified carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation after configuring the other modulation parameters. 8.6.2 Carrier Waveform Shape FSK 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. 8.6.3 Carrier Waveform Frequency For different carrier waveforms, the settable range of carrier frequency is different. HDG3000C User manual Copyright © Qingdao Hantek Electronics Co., LTD 46