Hantek HDG3000B Series, User Manual

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Modulation
EN
Copyright © Qingdao Hantek Electronics Co., LTD HDG3000B User manual
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another ch
CH1 and CH2 can be used as modulation sources reciprocally. When CH1 is used as
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 180º
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.