Measurement Computing Data Translation DT9857, User Manual

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Overview
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Support for IEPE (Integrated Electronic Piezoelectric) inputs, including use of a 4 mA
current source with 24 V compliance voltage for AC or DC coupling.
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In continuous scan mode, supports a start trigger for acquiring pre-trigger samples
and a reference trigger for acquiring post-trigger samples. You can specify the number
of post-trigger samples to acquire before stopping the operation.
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For the start trigger, supports a software-programmable trigger source (software,
external digital trigger, threshold trigger, or Sync Bus). For the threshold trigger, you
can program the threshold value from –10 V to +10 V.
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For the reference trigger, supports a software-programmable trigger source (external
digital trigger, threshold trigger, or Sync Bus).
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Supports the ability to return the value of the tachometer, general-purpose
counter/timer, measure counters, and digital input port in the analog input data
stream, allowing you to measure a variety of signals synchronously with analog input
measurements.
• Analog output subsystem:
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Two stimulus analog output channels.
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One 32-bit D/A converter per analog output channel.
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Single value, waveform, and continuous streaming output.
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Programmable output rate from 30 kSamples/s to 216 kSamples.
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Output range of ±10 V.
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Software-programmable trigger source (software trigger or external digital trigger) to
start the analog output operation.
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Supports the ability to update the digital output port synchronously with the analog
output channels.
• Eight digital input lines and eight digital output lines. For synchronous measurements,
you can return the value of the digital input port with your analog input data and/or
update the value of the digital output port with the analog output channels.
• One tachometer input signal. The value of the tachometer input signal is returned in the
analog input data stream for synchronous measurements.
• One general-purpose counter/timer for performing event counting, up/down counting,
edge-to-edge measurement, continuous edge-to-edge measurement, rate generation, and
pulse output operations. You can read the value of the counter/timer directly or through
the analog input data subsystem, as the counter/timer can be included in the analog input
data stream for synchronous measurements.
• Two measure counters. You can program the edge that starts the measurement and the
edge that stops the measurement. Many edge types are supported. The data from the
measure counters is returned in the analog input data stream for synchronous
measurements.