Synthesized Function Generators DS340 — 15 MHz function and arbitrary waveform generator DS340 Function/Arb Generator · 1 µHz to 15.1 MHz frequency range · 1 µHz frequency resolution · Sine, square, ramp, triangle & noise · Phase-continuous frequency sweeps · 16,300 point arbitrary waveforms · FSK modulation · RS-232 and GPIB interfaces (opt.) The DS340 is a 15 MHz function and arbitrary waveform generator based on Direct Digital Synthesis (DDS). A combination of features, performance and low cost make the DS340 ideal for a variety of test and measurement applications. Sine waves and square waves can be generated at frequencies up to 15.1 MHz, and ramps and triangles up to 100 kHz. Frequency resolution is 1 µHz for all functions. The DS340 also includes a 10 MHz Gaussian white-noise generator. All functions can be swept logarithmically or linearly in a phase-continuous fashion over the entire frequency range of the instrument. A rear-panel SWEEP output provides a trigger signal at the start of a sweep to allow synchronization of external devices. Both unidirectional and bidirectional sweeps can be selected. Up to 16,300 arbitrary waveform points can be downloaded to the DS340’s waveform memory via the optional GPIB or RS-232 interfaces. PC software is provided for composing, editing and downloading arbitrary waveforms. The waveform memory can be played back at rates up to 40 Msamples/s. Both internal and external FSK modes allow the output frequency to be rapidly toggled between two preset values. FSK toggling can be done internally (at rates up to 50 kHz), or externally via a rear-panel input. Stanford Research Systems

Frequency Range Max. Freq. Resolution Sine 15.1 MHz 1 µHz Square 15.1 MHz 1 µHz Ramp 100 kHz 1 µHz Triangle 100 kHz 1 µHz Noise 10 MHz (Gaussian weighting) Arbitrary 10 MHz 40 MHz/N (sample rate) Modes Max. rate External FSK Output Source impedance Grounding Amplitude Range 50 mVpp to 10 Vpp into 50 Ω, 100 mVpp to 20 Vpp into Hi-Z Resolution 3 digits (DC offset = 0 V) Offset ±5 VDC (50 Ω) ±10 VDC (Hi-Z) Offset resolution 3 digits Accuracy 0.1 dB (sine output) Sine Wave Spurious response <–65 dBc to 1 MHz (increasing by 6 dB/oct above 1 MHz) Harmonic distortion DC to 20 kHz <–70 dBc 20 kHz to...