Modulation
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HDG3000B User manual Copyright © Qingdao Hantek Electronics Co., LTD
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⚫ 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.
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.
8.6.4 Modulation Source
Press [Mod] > SignalSrc softkey to select Internal (default) or External as the
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 frequency "shifts" between
"carrier frequency" and "modulating frequency" is determined by "FSK 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 FSK and
AM/FM/PM modulations externally.
8.6.5 FSK Rate
When internal modulation source is selected, press [Mod] > Rate softkey to set the rate
at which the output frequency shifts between "carrier frequency" and "hopping
frequency".
⚫ 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.
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