Modulation EN 8.7.4 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 phase "shifts" between "carrier phase" and "modulation phase" is determined by "PSK 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 PSK and AM/FM/PM modulations externally.
8.7.5 PSK Rate When internal modulation source is selected, press [Mod] > Rate softkey to set the rate at which the output phase shifts between "carrier phase" and "modulation phase". ⚫ 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. 8.7.6 Modulation Phase Press [Mod] > Phase softkey to set the modulation phase. ⚫ Use the numeric keypad or direction keys and knob to input the desired phase value. ⚫ The phase range is from 0є to 360є and the default is 180є.
8.8 BPSK Modulation Users can configure the instrument to "shift" its output phase between two preset values using BPSK modulation. The rate at which the output shifts between the two phases (called the "carrier phase" and the "modulation phase") is determined by the internal signal level of the instrument. HDG3000B User manual Copyright © Qingdao Hantek Electronics Co., LTD 48