How to Use the Modulated Waveform Function of HDG6000B?

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? You can use noise as the modulating waveshape, but you cannot use noise, or dc as the carrier waveform.

? If you select an arbitrary waveform as the modulating waveshape, the waveform is automatically limited to 4K points. Extra waveform points are removed using decimation.

? Front-Panel Operation: After enabling AM, press the Shape

Modulating Waveform Frequency

The function generator will accept an internal or external modulation source for AM.

? Modulating frequency (internal source): 2mHz to 50kHz. The default is 100 Hz.

? Front-Panel Operation: After enabling AM, press the AM Freq softkey, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

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Modulation Depth

The modulation depth is expressed as a percentage and represents the extent of the amplitude variation.

At 0% depth, the output amplitude is half of the selected value. At 100% depth, the output amplitude equals

the selected value.

? Modulation depth: 0% to 120%. The default is 100%.

? Note that even at greater than 100% depth, the function generator will not exceed 10V peak on the output

(into a 50? load).

? If you select the External modulating source, the carrier waveform is modulated with an external waveform.

The modulation depth is controlled by the ±2.5V signal level present on the front-panel Sync/Mod/Trig connector.

For example, if you have set the modulation depth to 100%, then when the modulating signal is at +2.5 volts,

the output will be at the maximum amplitude. When the modulating signal is at -2.5 volts, then the output will be

at the minimum amplitude.

? Front-Panel Operation: After enabling AM, press the AM Depth softkey. Then use the knob or numeric keypad

to enter the depth.

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How to Use the Sweep Function of HDG6000B?

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To Output a Frequency Sweep

In the frequency sweep mode, the function generator “steps” from the start frequency to the stop

frequency at a sweep rate which you specify. You can sweep up or down in frequency, and with

either linear or logarithmic spacing. For this example, you will output a swept sine wave from 1 Hz

to10 Hz. You will not change the other parameters from their default settings: internal sweep trigger,

linear spacing, and 1 second sweep time.

Sweep display on the generator

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Sweep display on the oscilloscope

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1 Select the function and amplitude for the sweep.

For sweeps, you can select sine, square, ramp, or arbitrary waveforms (pulse, noise, and dc are not

allowed). For this example, select a sine wave with an amplitude of 200 mV.

The Sine key light when using a sine wave.

Sine Sweep display on the generator

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Sine Sweep display on the oscilloscope