Digilent MCC DT9837B: Dynamic Signal Analyzer

The Measurement Computing DT9837Bis anUSB-based dynamic signal analyzer with four simultaneous 24-bit IEPE sensor inputs, and one tachometer input.

The DT9837B featuresa sample rates up to 105.4 kS/s/ch. The DT9837B also includes one 24-bit analog output.

Both devices feature built-in IEPE signal conditioning for direct measurements from sensors like accelerometers and microphones.

Each device supports four, single-ended analog input channels. All analog input channels are simultaneously clocked. Software-selectable gains of 1 and 10 provide effective input ranges of 10 V and 1 V, respectively. The DT9837A uses a 24-bit Delta-Sigma analog-to-digital converter (ADC) that provides anti-aliasing filters based on the clock rate. These filters remove aliasing, which is a condition where high frequency input components erroneously appear as lower frequencies after sampling.

Applications that require accelerometer, vibration, noise, or sonar measurements often use IEPE sensors.

These devices support an internal clock, which is derived from the USB clock. Use software to specify the internal clock source and the frequency at which to pace the input and output operations and to start the sample clock. The sampling frequency ranges from 195.3 Hz to 52.734 kHz.

Each device accepts one 30 V, 32-bit tachometer input signal. This signal has a maximum frequency of 1 MHz and a minimum pulse width of 0.4 ?s. The threshold voltage is fixed at +2 V with 0.5 V of hysteresis. Users can measure the frequency or period of the tachometer input signal using tachometer counter 0. Users can also measure the phase of the tachometer input signal in relation to the A/D sample using tachometer counter 1.

Software support includes QuickDAQ, an out-of-the-box application for data logging, visualization, and signal generation. Data can be viewed in real-time or post-acquisition on user-configurable displays. Drivers are included for the most popular applications and programming languages including Visual C++, Visual C#, Visual Basic.NET, DASYLab, LabVIEW, and MATLAB.

Key Features

• 4simultaneous IEPE inputs
• 24-bit resolution
• 105.5 kS/s/ch sample rate (DT9837B)
• One tachometer input
• No external power required

Project Links

• MCC DT Software Overview
• MCC Software Downloads
• DT9837 Series Manual

Target Applications

• Vibration measurement and analysis
• Predictive maintenance

Scope of Delivery

• MCC DT9837B
• USB cable
• Printed insert:Software Quick Start
• MCC packaging assembly/foam, etc.

References

• Manufacturer: DigilentInc.
• Manufacturer'sarticle name: MCC DT9837 Series: Dynamic Signal Analyzers
• Manufacturer's article number: 6069-410-048

Resources

• Product Page at Digilent Inc.
• Datasheet DT9837 Series
• Digilent Inc. Support Forum