Fundamental Operation
Configuring Analog Modulation (PSG-A Series Only)
Chapter 2 33
Configuring Analog Modulation (PSG-A Series Only)
PSG-A signal generators can modulate the RF carrier with four types of analog modulation:
amplitude, frequency, phase, and pulse.
AM, FM, and ΦM Sources
• AM, FM, and
Φ
M have two source paths each. These multiple source paths are summed
internally for composite modulation of the RF carrier.
• Each path can be supplied by one of four sources: Internal 1, Internal 2, External 1 or
External 2.
• Only one path can be active for each source. For example, if AM Path 1 is on, AM Path 2 is
on, and AM Path 1 source is set to Internal 1, AM Path 2 source must be set to Internal 2,
External 1 or External 2. Different paths cannot use the same source at the same time.
• Waveforms available from Internal 1 and Internal 2 include:
Sine sinewave with adjustable amplitude and frequency
Dual-Sine dual sinewaves with individually adjustable frequencies and a
percent-of- peak-amplitude setting for the second tone (available from
function generator 1 only)
Swept-Sine a swept sinewave with adjustable start and stop frequencies, sweep time,
and sweep trigger settings (available from function generator 1 only)
Triangle triangle wave with adjustable amplitude and frequency
Ramp ramp with adjustable amplitude and frequency
Square square wave with adjustable amplitude and frequency
Noise noise, in a uniform or Gaussian distribution, with adjustable amplitude
generated as a peak-to-peak value (RMS value is approximately 80% of
the displayed value)
DC constant adjustable amplitude
For a detailed description of the ranges and limitations of a specific waveform’s
parameters, see that waveform’s softkey description in Chapter 5, “Key Reference,” on
page 91.
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