Modulation EN signal is determined by the OSK "Rate". external Source When external modulation source is selected, the signal generator receives the external modulation signal from the [FSK/Trig/Sync/Extmod] connector on the rear panel. 8.12.5 OSK Rate When internal modulation source is selected, press [Mod] > Rate softkey to set. ⚫ 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. 8.12.6 Oscillate Time Oscillate time is the oscillation period of internal crystal oscillator.
The settable range of the oscillate time is related to the OSK rate currently selected. Press [Mod] > OscTime softkey and use the numeric keypad or direction keys and knob to input the desired time. The default range is from 8ns to 4.99975ms. 8.13 PWM Modulation A modulated waveform consists of a carrier waveform and a modulating waveform. In PWM, the pulse width of the carrier waveform varies with the voltage level of the modulating waveform. 8.13.1 Select PWM Modulation PWM is only available for the Square waveform. Press [Wave] > Square softkey, and then press [Mod] > Type > PWM softkey to enable the PWM function.
⚫ If the Square function has not been selected as carrier waveform, PWM in ⚫ When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled [Mod] > Type menu is unavailable. currently). ⚫ After PWM is enabled, the instrument will generate PWM waveform with the currently specified carrier and modulating waveforms. Copyright © Qingdao Hantek Electronics Co., LTD HDG3000B User manual 55