User Manual 38
5.3.2 Carrier Waveform Shape
FM carrier shape: Sine (default), Square, Ramp, Pulse, Arbitrary (except DC) or Harmonic
waveform.
Press the front panel key Sine, Square, Ramp, Pulse, Arb -> Type or Harmonic to select a
desired carrier waveform shape.
Noise and DC could not be used as carrier waveform.
5.3.3 Carrier Frequency
The maximum carrier frequency varies by function, as shown below. The default is 1 kHz for all
functions.
After the carrier waveform is selected, you can press Frequency/Period to highlight "Frequency",
and then use the numeric keyboard or direction keys and knob to input the desired frequency
value.
5.3.4 Modulating Waveform Source
HDG6000B(C) can receive modulating waveform from Internal (default), External, or Other
Channel. Press Mod -> Source to select the modulation source.
Internal Source
When internal modulation source is selected, press Shape to select Sine, Square, Ramp, Noise
or Arb as modulating waveform. The default is Sine.
Sine waveform
Square: 50% duty cycle.
Ramp: 50% symmetry.
Note: Noise can be used as modulating waveform but cannot be used as carrier waveform.
External Source
With the External source, an external waveform modulates the carrier waveform. The frequency
deviation is controlled by the ±2.5 V signal level on the front-panel [Sync/Mod/Trig] connector.
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