Sum Modulation
Sum Modulation
Sum modulation adds a modulating signal to any carrier waveform; it is typically used to add gaussian noise to a carrier.
The modulating signal is added to the carrier as a percentage of carrier waveform amplitude.
Enable Sum
l To avoid multiple waveform changes, enable Sum after configuring other modulation parameters.
l Front Panel:
l SCPI: SUM:STATe {OFF|ON}
Modulating Waveform Shape
The instrument accepts an internal or external modulation source. On a two-channel instrument you can modulate
one channel with the other.
l The modulating waveform shape (internal source) may be:
l Sine wave
l
Square with 50% duty cycle
l
UpRamp with 100% symmetry
l
Triangle with 50% symmetry
l
DnRamp with 0% symmetry
l Noise
l PRBS with PN7 sequence
l Arbitrary waveform
88 Agilent 33500 Series Operating and Service Guide
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