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Anthony Best is offering a range of products, including the VP106 that includes four operating modes.

In Mode A, any sensors that are connected are routed directly to the onboard National Instruments USB-4432 five-channel 24-bit DAQ, which is powered from a USB port.

There is no need to provide external power – customers can connect their sensors, activate the IEPE-sensor powering available from the USB-4432 and start taking data with ABD’s Plato NVH measurement and analysis system.

The USB-4432 device boosts 24-bit sampling, but it does not include any signal amplification (gain).

IEPE-microphones (with built-in pre-amplifiers) can be powered by the USB-4432, but sensitivities are typically less than 50mV/Pascal.

The input range of the USB-4432 is +/-40V, so a 50mV signal occupies only 0.125 per cent of the available sampling range.

VP106 modes B, C and D, therefore provide amplification to allow the level of such small signals to be boosted, resulting in higher-fidelity noise sampling.

The x1, x10 and x100 gain options in mode C are also useful for sampling range optimisation when using accelerometers.

VP106 modes B1 and B2 support cost-effective (CEL) microphones.

Based on robust dosimeter technology, these microphones are able to handle portable/in-vehicle noise measurement, and are also short and stubby.

This makes them suitable for integration into ABD’s MS108 microphone hat for in-vehicle noise assessments in the driver position.

VP106 modes B1 and C also provide tachometer signal conditioning, with up to 12V available for powering tach sensors if required.

Tach signals of up to +/-200V can be clamped down to a useable TTL-level, allowing magnetic/inductive sensors (as can also be supplied by ABD) to be used with ease.

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