Modulation
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HDG3000B User manual Copyright © Qingdao Hantek Electronics Co., LTD
56
8.13.2 Carrier Waveform Shape
PWM is only available for the Square waveform. Press [Wave] > Square.
8.13.3 Carrier Waveform Duty
Press [Wave] > Square softkey to select square as carrier waveform. Press [Setting] >
Duty softkey, then input the required value through the numeric keypad or knob.
8.13.4 Modulation Source
Press [Mod] > SignalSrc softkey to select Internal, External or Another Channel as the
modulation source.
internal Source
When internal modulation source is selected, press Shape softkey to select Sine,
Square, Ramp, Noise or Arb as the modulation source. The default is Sine.
⚫ Sine
⚫ Square: 50% duty cycle
⚫ Ramp: 50% symmetry.
⚫ Noise
⚫ Arb: Sinc, Exp Fall, Haver Sine, Lorentz, Gause, Dual Tone, ECG.
Note: Noise can be used as modulating waveform but cannot be used as carrier
waveform.
external Source
When external modulation source is selected, the Frequency and Shape menu in the
modulation menu is grayed out and disabled. The instrument receives the external
modulation signal from the [FSK/Trig/Sync/Extmod] connector on the rear panel. The
Duty Deviation is controlled by ±4V signal level on this connector.
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.
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