Product category:
Board-Level Instruments
News Release from: TTi (Thurlby Thandar Instruments) | Subject: CompuGen 4300
Edited by the Electronicstalk Editorial
Team on 12 July 2005
Card generates four waveforms at once
The CompuGen 4300 provides four channels of simultaneous data generation capable of outputting analogue signals at a maximum D/A conversion rate of 300Msample/s with 12bit vertical resolution.
The CompuGen 4300 from Gage Applied provides four channels of simultaneous data generation capable of outputting analogue signals at a maximum D/A conversion rate of 300Msample/s with 12bit vertical resolution (4096 levels) Arbitrary waveforms are generated by creating a digital representation of the waveform in the onboard memory of the CompuGen 4300
This article was originally published on Electronicstalk on 12 May 2000 at 8.00am (UK)
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This digital pattern is then converted into an analogue signal using a high-speed digital/analogue convertor and conditioning amplifiers.
The large onboard memory buffer of the CompuGen 4300 is a powerful feature because it allows for the generation of very long signals, with 4Msample of onboard memory shared equally among four channels (1Msample per channel).
Waveform generation is controlled by a stable 300MHz crystal oscillator which provides temperature stability, long-term stability, and precision far above what is available from standard waveform generators.
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The CompuGen 4300 may be operated in two distinct generation modes: free-run mode and triggered mode.
Free-run mode is provided for the generation of continuous repetitive signals with the CompuGen 4300.
In this mode, the onboard memory is seamlessly and endlessly looped during signal generation, with the pattern advancing from the last sample back to the first in exactly one clock cycle.
This means that a single cycle may be uploaded to memory and looped in order to create a continuous sine-wave signal.
In triggered mode, the CompuGen 4300 is configured to generate its preprogrammed waveform in a single-shot fashion, once every time a trigger event occurs.
The trigger circuitry is automatically re-armed in hardware after single-shot waveform generation in order to await another trigger event.
As it is done in hardware with no software interaction required, trigger re-arm is extremely fast.
By issuing multiple triggers, the user can easily create waveform bursts.
The source of the trigger event can be a software trigger or an external trigger signal.
Using external triggering, the CompuGen 4300 generates a single-shot waveform on receipt of the rising edge of a TTL pulse at the external trigger input.
Using software triggering, the generation of a single-shot waveform occurs when a software command is issued.
A multi-card CompuGen system, consisting of up to four independent CG4300 cards, can be configured to achieve up to 16 output channels.
The CompuGen CG4300 is available exclusively in the UK from TTi (Thurlby Thandar Instruments).
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