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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