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Chapter 5 137
5 Analog Modulation
In the following sections, this chapter describes the standard continuous waveform and optional
analog modulation capability in Agilent E8257D PSG Analog and E8267D PSG Vector signal
generators.
• “Analog Modulation Waveforms” on page 137
• “Configuring AM (Option UNT)” on page 138
• “Configuring FM (Option UNT)” on page 138
• “Configuring ΦM (Option UNT)” on page 139
• “Configuring Pulse Modulation (Option UNU/UNW)” on page 140
• “Configuring the LF Output (Option UNT)” on page 141
Analog Modulation Waveforms
Available standard internal waveforms include:
Sine sine wave with adjustable amplitude and frequency
Dual-Sine dual-sine waves with individually adjustable frequencies and a percent-of-
peak-amplitude setting for the second tone (available from function generator
only)
Swept-Sine swept-sine wave with adjustable start and stop frequencies, sweep rate, and sweep
trigger settings (available from function generator 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 with adjustable amplitude generated as a peak-to-peak value (RMS value is
approximately 80% of the displayed value)
With Option UNT, the signal generator can modulate the RF carrier with amplitude, frequency, or
phase modulation. Option UNT also provides low-frequency output capability.
With Option UNU, the signal generator can modulate the RF carrier with standard pulse modulation
(150 ns minimum pulse width).
With Option UNW, the signal generator can modulate the RF carrier with narrow pulse modulation
(20 ns minimum pulse width).