DDS-Based Generator Produces 20-MHz Waveforms
The Model 4040DDS Sweep Function Generator uses direct digital synthesis to generate 20-MHz sine and square waveforms and 2-MHz triangle waveforms. It offers 10 Vpk-pk amplitude into 50 Ω, AM and FM modulation, linear or logarithmic sweeps, and adjustable DC offset of ±4.5 V.
A range of triggering capabilities includes internal-external trigger source and gated modes of operation. Adjustable symmetry allows the generator to produce a variety of pulse waveforms, ramp or sawtooth waves, and skewed sine waves. Resolution is 10 mHz. A four-digit counter and coarse and fine tuning controls facilitate setting of the output frequency.
The 4040DDS features a menu-driven front-panel interface that includes a large graphical LCD. Waveform parameter changes and data entry can be made using the front-panel rotary knob.
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