Frequently Asked Questions


Acoustic Sensors

What is the purpose of the calibration line?

Calibration line is AC coupled to the preamplifier input, with 6 dB attenuation. It can be used to test electrical system integrity. An electrical input signal is applied to the cal line (blue) at cable termination. The output signal level is then measured. The output level will be 6 dB less than the input level. Note: the maximum calibration input level = 16 volts peak to peak, 5.7 volts RMS. The calibration line can also be grounded to minimize noise during use, if necessary.

What is the purpose of shield connections?

Shield connections are floating (not grounded) at the preamp; they can be grounded at the cable end to minimize noise, if necessary.

What is the maximum source level?

The preamp will begin to clip when the acoustic SPL exceeds 165 dB re 1µPa at one meter away.

Customer Support

Does Sparton offer multi-quantity pricing?

Yes.  Please call 386.985.4631 for bulk quantity pricing.

What is the lead time?

Lead time is determined based on availability, quantity ordered, and current demand.  Please call 386.985.4631 to speak with an inside sales associate to best determine lead time for your bulk quantity needs.

How do I know my order processed successfully?

You will receive an email within minutes of your order with your order confirmation.  If your credit card is declined you will also receive notification that we were unable to process your order.  In this case, please contact 386.985.4631 in order to provide an alternative payment method.

When should I expect my order?

You will receive an email within 48 hours of placing your order that will detail your ship date as well as tracking information.

Will I receive an invoice?

Your invoice will arrive by email within minutes of placing a successful order through our site.  

Inertial Sensor Systems

Are your sensors RoHS compliant?

Yes. Sparton sensors have been specifically designed for both commercial and high-reliability applications. The materials and chemicals used in the design, assembly, and manufacture of our products do not exceed the thresholds set forth in the RoHS Directive 2002/95/EC for Lead, Cadmium, Mercury, Hexavalent Chromium, Polybrominated Biphenyls (PBB) and Polybrominated Diphenyl Ethers (PBDE).

What is NorthTek™?

The Sparton NorthTek™ application platform is a powerful, next-generation feature that positions the DC-4 and GEDC-6 inertial systems as the world’s only fully programmable sensor, allowing virtually limitless customizations and applications. NorthTek™ is based upon the Forth programming language, and allows the ability to tailor a NorthTek™ equipped sensor to the operating environment of a product.

What is AdaptNav™?

Sparton AdaptNav™ sensor fusion adaptive algorithms provide real-time (non-linear) sensor heading optimizations when used in varying magnetic and dynamic operating environments, offering unparalleled orientation accuracy under the most challenging conditions. AdaptNav™ algorithms look at the system dynamics of the sensor environment in real-time and make adjustments based on optimal sensor reliability modeling.  AdaptNav™ improves on current Kalman filter based approaches (including extended Kalman filters) by not requiring a dynamic profile to be preselected. There is no need to pre-select option models or use ‘trial and error’ parameter settings prior to deployment in the sensor application, which eliminates the guesswork often associated with many Kalman filter implementations.

Will the sensor provide a True North indicator?

Yes. In fact, Sparton inertial systems provide both Magnetic and True North indicators.

How does the sensor know where I am geographically to use the appropriate declination?

Sparton sensors will accept inputs of latitude, longitude, date, and altitude information and calculate the magnetic variation based on your position. They will then use the magnetic variation to provide a True North output.

Will the accuracy of the sensors be different the North/South Pole verses the Equator?

All sensors will experience performance degradation with latitude. At the North/South magnetic poles, the magnetic field is vertical and gives no indication of direction. Therefore, compasses will be more accurate at the equator than the poles.

Are the X, Y, and Z axes considered body centered (relative to the board) or are they relative to the Earth?

The X, Y and Z axes are relative to the sensor board. Refer to the Sparton Sensor Product Guide and the NDS-1 Navigation Development System Users Guide for more information.

How should the sensor board be oriented?

Sparton sensors are designed such so they can support any mounting orientation. This is a User-Selectable feature. The sensor will indicate the heading that corresponds to the angle between Magnetic North and the North direction of the compass board. Refer to the Sparton sensors Product Guide for more information.

How is Pitch, Roll, X, and Y defined?

Pitch is associated with rotation about the Y-axis. It is measured using the X-axis accelerometer to measure Tilt. Similarly, Roll is associated with rotation about the X-axis and is measured using the Y-axis accelerometer. Refer to the Sparton sensor Product Guide for more information.

Can you measure 360 degrees of tilt?

Yes. Roll can be +/-180 degrees (or a full 360 degrees). Pitch can be +/- 90 degrees.

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