DT9837 - Servo2Go
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1. Analog In Tachometer Input O Figure 5 Simultaneous Delta Sigma A D converters and the tachometer input are synchronized through software to accommodate for the group delay of the A D converters sample clock is first started and before the first conversion is completed due to the group delay of converters The tachometer data which does not have the 38 sample group delay is syn chronized with the analog data stream This is done through the firmware and device driver by caching the tachometer data and aligning it in time with the analog data in the user s data buffers Tachometer Input The DT9837 includes support for a tachometer input in the analog input data stream for synchronous measure ments You can software select the mea surement edge for the tachometer input choices are rising or falling rising is the default The module accepts one 30V 32 bit tachometer input signal with a maximum frequency of 380kHz and a minimum pulse width of 1 3 microseconds The threshold voltage is fixed at 2V with 0 5V of hysteresis The tachometer input is treated like any other channel in the analog input chan nel list therefore all the clocking trig gering and conversion modes supported for analog input channels are supported for the tachometer input Waveform Quality Analog Output The DT9837 supports one 24 bit D A converter with an output range of 10V You can output a single value from th2. 10 000k 20 000k 30 000k 40 000k X f Hz 1 Data dB Me Blackman Harris Mark largest peak and its harmonic Enabled 50 000k 0ER a 60 000k 70 000k 80 000k 90 000k 100 00C Spectrum Setup Figure 6 Measure Foundry allows you to create noise and vibration applications quickly and easily using a drag and drop graphical inter face No programming required DT Display for NET is a control for plotting data to a Windows form It provides a powerful and user friendly interface for render ing data E DT Open Layers for Win32 DT Open Layers for Win32 con sists of the DataAcq SDK The DataAcq SDK consists of the necessary header files libraries example programs and documentation to develop your own DT Open Layers data acqui sition and control applications It is intended for use with non NET languages such as ANSI C Visual C 6 0 and Visual Basic 6 0 E Drivers The 32 bit WDM device drivers make your application cross plat form compatible These drivers support Data Translation USB and PCI boards using Windows 2000 XP You can choose to install demo ver sions of the following software from the CD GERMANY 49 7142 95310 E Measure Foundry is a powerful visual software environment for creating test and measurement control and analysis applica tions E quickDAQ is a high performance ready to run application that lets you acquire plot analyze and sav
3. hi ii eee n Output 5 External Trigger ERr E E Board Dimensions 1 Tachometer Input Channel 146mm x 100mm Figure 3 An OEM board level version of the DT9837 is available DT9837 OEM The DT9837 and the DT9837 OEM provide BNC connectors for easy signal connections Exploded View Top Panel Marked for easy signal connection DT9837 Board CE Compliant Enclosure Maintains signal integrity Figure 4 The DT9837 board is encased in a rugged metal enclosure to ensure CE compliance and maintain signal integrity WWW DATATRANSLATION COM US amp CANADA 800 525 8528 GERMANY 49 7142 95310 UK 44 1256 333330 ED Analog Inputs The DT9837 module supports four ana log input channels and a tachometer input Gains of 1 and 10 are supported for effective input ranges of 10V and 1V The module uses 24 bit Delta Sigma analog to digital converters ADCs that provide 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 You can read data from one or more analog input channels using an analog input channel list Because these mod ules feature simultaneous sampling the order of the channels in the channel list does not matter You can enter up to 5 entries in the channel list including four analog input channels and the tachometer input Analog
4. mY me Figure 1 The DT9837 has 4 simultaneous IEPE sensor inputs plus a synchronous tachometer input and is ideal for portable noise and vibration mea surement applications Supported by all DT Open Layers for NET Class Library compliant software to meet any application need Summary of Features D A Channels Simultaneous Subsystem Operation Tachometer Input Applications Vibration Acoustics Sonar 1 Waveform 1 Synchronous or to Analog Single Value Data Stream The 38 segment clock time conversion of the Delta Sigma A Ds is offset in soft ware to provide this time correlated 9 Compliance Voltage o 0 gt x1 10 QS T x41110 AID 2 yee ra x1 10 AID 3 i x1 10 Tachometer Input data The rugged small module is self powered via the USB connection to a PC laptop BNC connections are provided for all I O signals for secure and easy to use operation Figure 2 The DT9837 isa high performance multifunc tion data acquisition module for USB that provides A Ds with IEPE capability one waveform D A a tachometer input and simultaneous operation of all subsystems Status a D A Output External Trigger 4 Analog Inputs with BNC pata 4 24 Bit Sigma Delta A Ds with IEPE Conditioning Powered on High Speed USB 2 0 iaaiiai il i Fig i mee jz i m i u Status light a 24 Bit Analog ae Signal
5. Little or no reprogramming is needed E Click here for full specifications E Click here for mechanical drawings User Manuals The DT9837 includes a comprehensive user s manual Manuals are provided in electronic PDF format on the Data Acquisition OMNI CD provided with the module You can also purchase hard copies Technical Support As you develop your application appli cation engineers are available during normal business hours to discuss your requirements Extensive information including drivers example code pinouts a searchable Knowledgebase and much more is available 24 hours a day on our web site at www datatranslation com Ordering Summary All Data Translation hardware products are covered by a 1 year war ranty For pricing information see a current price list visit our web site or contact your local reseller DT9837 m DI9837 High performance USB module for sound and vibration analysis packaged in a CE compliant enclosure m DI9637 OEM Board level version of the DT 9837 Software All software and documentation is provided on the Omni CD that ships with the module and can be downloaded from the web site Copyright 2006 Data Translation Inc All rights reserved All trademarks are the property of their respective holders Prices availability and specifications subject to change with out notice 6 2006
6. DT9837 High Performance USB Module for Sound amp Vibration Analysis DT9837 Features 4 simultaneous 24 bit Delta Sigma A D chan nels for high resolution measurements Support for four IEPE inputs including 4mA current source and AC or DC coupling Portable operation No external power supply needed Runs on USB power Tachometer input support in the A D data stream for synchronizing measurements Sampling rate of over 52kHz to meet your application need Analog input range of 10V with software selectable gains of 1 and 10 One 24 bit Delta Sigma D A converter with single value or ultra smooth waveform capability Programmable triggers for analog input operations for maximum flexibility Choose a software trigger TTL trigger or analog threshold trigger Simultaneous operation of the A D and D A subsystems for maximum performance Overview The DT9837 is a highly accurate five channel data acquisition module that is ideal for portable noise and vibration measurements Four 24 bit IEPE ICP sensor inputs are synchronized with a tachometer input to provide data streams that are matched in time for field or laboratory use Per Channel DT9837 52 734kHz A D Throughput 4 IEPE Inputs Simultaneous a BUS USB Type Noise and Vibration Analysis C it Ta a al letela a oh leak r ft or n am ane aed i ar oy a hm oo fr em i Thor ES a m NE mae oF ane
7. Inputs with IEPE Functions Applications requiring accelerometers vibration noise and sonar measure ments often use IEPE sensors The DT9837 module supports the following software programmable IEPE functions for each of its four analog inputs E Current source Enable or disable the use of a 4mA current source to drive the accelerometer E AC DC coupling Select whether AC coupling or DC coupling is used Delta Sigma A D Converters These modules have built in anti alias ing filters for superior AC performance in noise and vibration testing applica tions Internally the DT9837 module uses a Delta Sigma converter for each analog input Delta Sigma converters offer the following advantages for analog input operations making them ideal for noise and vibration testing applications E Reduce noise and improve accuracy by oversampling each input E Eliminate errors that result from aliasing and high frequency noise E Provide excellent low level signal to noise performance which improves dynamic accuracy on low level sig nals E Provide excellent differential linearity which ensures consistently accurate data conversion across the full input range Group Delay and Data Synchronization Because of the inherent filtering algo rithms Delta Sigma converters have an initial delay of 38 clock pulses after the Simultaneous A D Up to 52 734 kHz per Channel Analog In 4 Delta Sigma Converters
8. a software command Using an external trigger analog input operations start when the module detects a low to high transition on the EXT TRIG TTL input of the module Using an analog thresh old trigger analog input operations start when the module detects a signal on analog input channel 0 that rises above 1 0V Programmable Clock The DT9837 module supports an internal clock with a maximum time base of 27MHz Using software you can specify the frequency from 195 3Hz to 92 734kHz at which to sample all the input channels The value that you specify for the internal clock frequency is multiplied by 512 internally to set the oscillator on the module For example if you specify an internal clock frequency of 50kHz the module sets the internal oscillators for the A D converters to 25 6MHz USB 2 0 Compatibility The DT9837 module uses a high speed USB 2 0 interface which provides trans fer rates between the module and the host at up to 480 Mbits s This means that all acquired signals stream to and from the host at full acquisition speeds The DT9837 can also be used with USB 1 1 ports but at USB 1 1 performance 12 Mbits s WWW DATATRANSLATION COM Software There are many software choices avail able for application development with the DT9837 Each option offers devel opment capability at different levels Choose from ready to measure applica tions to full graphical programming with Measure Foundry Measure F
9. e analog output channel or you can use a software trigger to start a waveform operation A two pole 10kHz Butterworth filter is applied to remove clocking noise and smooth sig nal output A standard waveform such as a sine triangle or square wave is easily pro duced by loading the output memory with 8 192 samples The specific wave form is output at a fixed rate of 46 875 kHz Great care has been used in design to minimize the glitch energy for any major or minor carry This results in extremely smooth waveforms You can update the analog output chan nel as you are acquiring analog input data for gap free simultaneous stimulus and response Note that since the mod ule uses a Delta Sigma D A converter 34 clock pulses are required before the first D A conversion is complete Synchronous Operation The DT9837 supports synchronous ana log input tachometer input and analog output operations Data is streamed synchronously to host memory The synchronous operation allows all I O data to be processed and correlated for all inputs and outputs This is very valuable in determining the response across a device under test DUT to stimuli at the same exact instant Programmable Triggers You can start an analog input operation using either a software trigger external TTL trigger or analog threshold trigger Analog output operations start using a software trigger only Using the internal trigger I O operations start based on
10. e data to disk at up to 2 MHz per channel without writing any code quickDAQ supports appli cations from temperature mea surement to high speed testing and analysis E LV Link contains all necessary VIs examples and documenta tion to use Data Translation hardware in LabVIEW 8 0 and higher The following software is available as a free download from out website E DAQ Adaptor for MATLAB to access the visualization and analysis capabilities of MATLAB from The MathWorks The DT9837 is also supported by ME scope from Vibrant Technology It is perfect for post processing and analysis To learn more visit their website at www vibtech com UK 44 1256 333330 CE Easy Signal Connections The DT9837 provides BNCs for the ana log input tachometer input analog out put and external trigger signals EMI and ESD Design Criteria The DT9837 has been designed to per form with the lowest noise characteris tics Damping resistors in series with every I O line minimize ringing and EMI and provide current limits that protect against transient signals Cross Series Compatibility Saves Programming Time Protects Your Investment Virtually all Data Translation data acquisition boards including the DT9837 are compatible with the DT Open Layers for NET Class Library This means that if your application was developed with one of Data Translation s software products you can easily upgrade to a new Data Translation board
11. oundry Measure Foundry is a powerful visual software environment for creating test and measurement control and analysis applications It provides all the power and flexi bility of a programming language in a drag and drop graphical inter face No programming or wiring is required E Create noise and vibration appli cations quickly and easily E Spectrum analyzer panel allows you to display and analyze the frequency spectrum of an input signal E Perform an FFT auto correla tion or power spectrum on the input signal E Store the data to either an ASCII data file or a high performance DCF file E Provides several window func tions Rectangle Hanning Hamming Hann Blackman Blackman Harris 67db or 92 db E Provides digital filter functions including Bessel Butterworth Chebyshev and Elliptic Other Software Choices The DT9837 module ships with the Omni CD that includes the following software E DT Open Layers for NET with DT Display The DT Open Layers for NET Class Library is a collection of classes methods properties and events that provides a program ming interface for DT Open Layers compatible hardware devices It can be used from any language that conforms to the Common Language Specification CLS including Visual Basic NET Visual C Visual C NET with managed extensions and Visual J NET US amp CANADA 800 525 8528 Spectrum View LEE e e 1 9997 6 Hz A 1240B
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