- High stability 10 MHz DDS function generator
- Arbitrary capability with storage for five user defined waveforms
- Multiple standard and complex waveforms recalled from internal memory
- Extensive modulation capabilities include sweep, AM, Gating, Trigger/Burst, FSK and Hop
- GPIB and RS-232 interfaces
The Fluke 271-U 115V High-Stability DDS Function Generator, 10 MHz is a high-performance function generator that uses Direct Digital Synthesis techniques. A wide variety of standard waveforms are provided and an arbitrary waveform capability allows it to be used to generate non-standard and user-defined waveforms. Extensive modulation capabilities make this a highly versatile signal source.
Standard waveforms are sine, square, positive pulse, negative pulse, triangle, ramp up, ramp down. Additionally arbitrary waveforms, multi-level square waves, waveform hopping and pseudo-random noise can be generated All waveforms are available up to 10 MHz. However, the purity of triangle, ramp, and multi-level square wave waveforms is not specified above the specific ranges of the generator.
Direct Digital Synthesis
Direct digital synthesis (DDS) is a technique for generating waveforms digitally using a phase accumulator, a look-up table and a digital-to-analog-converter (DAC). The accuracy and stability of the resulting waveforms is related to that of the crystal master clock. The DDS generator offers not only exceptional accuracy and stability but also high spectral purity, low phase noise and excellent frequency agility.
Arbitrary (and Complex)
A number of "complex" waveforms are pre-programmed in the ROM. A further five, user defined, waveforms may be loaded via the digital interfaces and stored in non-volatile RAM. The frequency range and all waveform points can be continuously output up to 27 kHz, beyond which they are sampled at initially.
The Fluke 271 is capable of Multi-function output, depending upon the mode. Except when it is in sweep mode, the output is that of the trigger generator at CMOS/TTL levels from 1 kW. While in Sweep mode, the output is a 3-level waveform, changing from high (+4 V) to low (0 V) at the start of sweep, with narrow 1 V pulses at each marker point.