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keypad or direction keys and knob to input the desired frequency value.
8.2.4
Modulation Source
Press [Mod] >
modulation source.
internal Source
When internal modulation source is selected, press
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
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. At
this point, the AM modulation amplitude is controlled by the ±4V signal level on this
connector. For example, when the modulation depth is 100%, the output amplitude is
maximum when the external modulation signal is +4V, and the output amplitude is the
minimum when the external modulation signal is -4V.
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.
8.2.5
Modulation Frequency
When internal modulation source is selected, press [Mod] >
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
Copyright © Qingdao Hantek Electronics Co., LTD
SignalSrc
softkey to select Internal, External or Another Channel as the
Shape
softkey to select Sine,
Frequency
and
Shape
menu in the
Frequency
softkey to set
HDG3000C User manual
Modulation
39
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