Modulation EN the modulated wave, CH2 can be used as the modulation source. And vice versa. When selecting another channel as the modulation source, please turn on the output of that channel. 8.4.5 Modulation Frequency When internal modulation source is selected, press [Mod] > Frequency softkey to set the frequency of the modulating waveform. ⚫ Use the numeric keypad or direction keys and knob to enter the desired frequency values. ⚫ The modulating waveform frequency range is 2mHz to 1MHz, and the default value is 100Hz. Note: This menu will be grayed out and disabled when other modulation sources except the internal modulation source are selected.
8.4.6 Phase Deviation Phase deviation is the deviation of the modulating waveform phase relative to the carrier waveform phase. Press [Mod] > Deviation softkey to set the PM phase deviation. ⚫ Use the numeric keypad or direction keys and knob to input the desired phase values. ⚫ The phase deviation is set to 0 ° to 360 °. When external modulation source is selected, the phase deviation is controlled by the ±4V signal level on the [FSK/Trig/Sync/Extmod] connector on the rear panel. For example, if the phase deviation is set to 180 °, +4V signal level corresponds to a 180є phase variation. The lower the external signal level, the less deviation would be generated.
8.5 ASK Modulation Users can configure the instrument to "shift" its output amplitude between two preset values using ASK modulation. The rate at which the output shifts between the two amplitudes (called the "carrier amplitude" and the "modulation amplitude") is determined by the internal signal level of the instrument or the external signal level on the [FSK/Trig/Sync/Extmod] connector on the rear panel. 8.5.1 Select ASK modulation Press [Mod] > Type > ASK softkey to enable this function. HDG3000C User manual Copyright © Qingdao Hantek Electronics Co., LTD 44