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Hardware Recommendations

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(for use with SpectraPLUS-RT or SpectraPLUS-SC)

Although there are a large selection of sound cards on the market they all lack key features needed for test and measurement applications.  Our SpectraDAQ-200 module was custom designed for use with SpectraPLUS-RT and SpectraPLUS-SC.  It uses the highest quality data converters for exceptionally low noise and distortion, has fixed gain steps for easy calibration to your transducer sensitivity, IEPE power for accelerometers or microphones, and incorporates standard BNC connectors widely used in test environments.

Model: SpectraDAQ-200 Vibration Testing(v2)


  • Up to 24bit/192 kHz sampling
  • Dual channel
  • IEPE (4ma constant current) power for accelerometers and microphones
  • Fixed gain steps (+/-10V, 2.5V, 625mV, 156mV)
  • BNC connectors
  • Digital I/O lines for process control solutions
  • Excellent performance (very low noise floor and distortion)
  • Small rugged portable metal case
  • USB 3.0 (cable included)
  • Fully USB Bus powered - no power supply required

For two channel acoustic and vibration signal measurements - this device does it all! 

Key Specifications:

  • THD: < 0.002 %
  • Frequency Response: 1Hz - 90kHz (-1dB)
  • Low Frequency Cutoff: 0.5 Hz (-3dB)
  • Spurious Free Dynamic Range: > 95 dB
  • Noise Floor: < -110 dBVrms

Click here for a datasheet with detailed specifications

Data Translation Modules
(for use with SpectraPLUS-DT)

Data Translation modules are used by SpectraPLUS-DT for data acquisition. There are a wide selection of these modules available; the most popular is the DT 9837A:

Manufacturer: Data TranslationVibration Testing
Model: DT-9837A


  • 4 A/D Channels, 52.7 kHz sampling rate (simultaneous), 24 bit resolution
  • IEPE power (constant current)
  • Selectable AC/DC coupling
  • Input Range: 1 V or 10 V
  • 1 D/A channel, 24 bit continuous streaming
  • Hardware Triggering (TTL)
  • Tachometer Input Channel
  • USB interface (bus powered - no external power supply needed)
  • 500 Volt PC-Module isolation
  • Rugged steel case with BNC connectors

Click here for a summary of the available Data Translation DT-9800 models

Microphone - Constant Current Powered (IEPE)

This microphone is powered by a 4ma constant current power source (IEPE/ICP/CCP) such as is provided by the SpectraDAQ-200, Data Translation DT9837A and others. 

Manufacturer: iSEMconReal Time Analyzer
Model: EMM-13D082-CCP


  • Frequency Response: 10Hz - 20kHz +/-1dB
  • Sensitivity: 30mV/PA
  • Built in preamplifier
  • Prepolarized
  • Omnidirectional
  • Dynamic Range: approx. 30...125 dBspl
  • Temperature: -10 to +55 C (+14 to +131 F)
  • Type: Prepolarized Condenser, Omni-directional
  • Capsule Diameter: 1/4"
  • Built in preamp
  • Max SPL: 125 dB
  • IEPE Powered (2-20ma constant current))
  • BNC connector (cable included)
  • Includes Calibration File
  • Stainless Steel housing
  • High SPL version available (140 dB max SPL)
  • Meets Class 1 frequency response as per IEC-61672


Microphone Calibrator

This microphone calibrator is compatible with both of the microphones listed above and others that have a 1/4" diameter capsule.

Manufacturer: iSEMcon
Model: SC-1


  • Frequency: 1 kHz
  • Level: 94 and 110 dB
  • Accuracy:
        +/-0.5 dB @ 20 deg C 
         Calibration Certificate included
  • Power: 9VDC
  • 1/4" Diameter adapter included

Digiducer - Digital Accelerometer

The Digiducer is a precision accelerometer with an internal digital data acquisition circuit. It works directly with SpectraPLUS-RT and SpectraPLUS-SC for making reliable and accurate vibration measurements. A data acquisition module is not required.


  • Plugs directly into any USB port
  • No need for a sound card, special power supplies or additional cabling
  • Simple calibration - embedded calibration data is read from the device for quick and painless calibration of SpectraPLUS-RT and SpectraPLUS-SC
  • Uses existing operating system drivers – no download required
  • Ideal for portable single channel vibration measurements using a Windows based tablet

Manufacturer: Digiducer
Model: 333D01

  • Flat response up to 8 kHz
  • 24 bit internal ADC
  • Cable included

Click here for a full list of specifications