Thurlby Thandar Instruments TTI TG1010 Generator
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This Programmable Function Generator uses direct digital synthesis to provide high performance and extensive facilities at a breakthrough price. It can generate a variety of waveforms between 0.1mHz and 10MHz with a resolution of 7 digits and an accuracy better than 10ppm. Direct digital synthesis for accuracy & stability Direct digital synthesis (DDS) is a technique for generating waveforms digitally using a phase accumulator, a look-up table and a 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. A wide range of waveforms High quality sine, square and pulse waveforms can be generated over the full frequency range of 0.1mHz to 10MHz. Triangle waveforms, ramp waveforms and multi-level squarewaves can also be generated but with limitations as to the maximum useable frequencies. Variable symmetry/duty-cycle is available for all standard waveforms. Arbitrary waveform capability Arbitrary waveforms can be loaded via the digital interfaces and then used in a similar way to the standard waveforms. Up to five arbitrary waveforms of 1024 10-bit words can be stored in non-volatile memory. The waveform clock is 27.48MHz maximum. This facility considerably expands the versatility of the instrument making it suitable for the generation of highly complex waveform patterns. In addition, numerous “complex” waveforms are pre-defined in ROM, including commonly used waveshapes such as sinex/x, exponentially decaying sinewave, etc. Further waveshapes will be added to the library in response to customer requests. Sweep All waveforms can be swept over their full frequency range at a rate variable between 10 milliseconds and 15 minutes. The sweep is fully phase continuous. Sweep can be linear or logarithmic, single or continuous. Single sweeps can be triggered from the front panel, the trigger input, or the digital interfaces. Two sweep markers are provided. AM Amplitude Modulation is available for all waveforms and is variable in 1% steps up to 100%. An internal AM source is incorporated. Alternatively modulation can be controlled from an external generator. FSK Frequency Shift Keying provides phase coherent switching between two selected frequencies at a rate defined by the switching signal source. The rate can be set from dc to 50kHz internally, or dc to 1MHz externally. Trigger/Burst & Gated All waveforms are available as a triggered burst whereby each positive edge of the Trigger signal will produce one burst of the carrier, starting and stopping at the phase angle specified by the start-stop phase setting.
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02 November 2013
Introduction 2 Specifications 4 Safety 9 EMC 10 Installation 11 Connections Front Panel Connections Rear Panel Connections 12 12 12 General Operation 14 Main Generator Operation Main Generator Parameters Warning and Error Messages Auxiliary Output Waveform Generation Options 17 17 20 22 22 Sweep Operation 25 Triggered Burst and Gate Triggered Burst Gated Mode 28 28 30 Amplitude Modulation 31 FSK 33 Special Waveforms Staircase Arbitrary Noise 34 34 34 36 HOP 37 System Operations Storing and Recalling Set-ups System Settings 39 39 39 Synchronising Generators 41 Calibration 43 Application Examples 45 DDS Operation and Further Waveform Considerations 49 Remote Operation 52 Remote Commands 62 Remote Command Summary 69 Appendix 1. Warning and Error Messages 72 Appendix 2. Factory System Defaults 74 Appendix 3. Instructions for using TG1010 with WaveForm DSP 74 Appendix 4. Application Information Notes 76 Appendix 5. Calibration Password 78
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