Modulation
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Copyright © Qingdao Hantek Electronics Co., LTD HDG3000B User manual
49
8.8.1 Select BPSK Modulation
Press [Mod] > Type > BPSK softkey to enable the BPSK function.
⚫ When Mod is enabled, Sweep or Burst will be disabled automatically.
⚫ After BPSK is enabled, the instrument will generate BPSK waveform with the
currently specified carrier and modulating waveforms. To avoid multiple waveform
changes, enable modulation after configuring the other modulation parameters.
8.8.2 Carrier Waveform Shape
BPSK carrier shape: Sine (default), Square, Ramp, Pulse, Arbitrary (except DC) or
Harmonic waveform.
⚫ Press [Wave] button on the front panel to select the desired carrier waveform.
⚫ Noise and DC could not be used as carrier waveform.
8.8.3 Carrier Waveform Phase
Press [Setting] > Phase softkey on the front panel and use the numeric keypad or
direction keys and knob to input the desired phase.
The available phase ranges from 0º to 360º and the default value is 0º.
8.8.4 Modulation Source
BPSK uses internal modulation source. After enabling BPSK modulation function, press
[Mod] > Data Source softkey, and select 01 code, 10 code, PN15 code or PN21 code
as the modulation source. The default data source is 01 code.
8.8.5 BPSK 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.
8.8.6 Modulation Phase
Pressing [Mod] > Phase softkey to set the modulation phase.
⚫ Use the numeric keypad or direction keys and knob to input the desired phase
values.
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