VTI Instruments Corp.
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Introduction
S
ECTION
1
I
NTRODUCTION
O
VERVIEW
The EMX-4250, EMX-4251, EMX-4350 and EMX-4380 (referred to collectively as the
“EMX-4250/4350/4380”) are Smart Dynamic Signal Analyzers incorporate best-in-class analog
design methodology to deliver industry leading measurement accuracy. This instrument is ideal for
a wide range of applications including noise, vibration, and harshness (NVH); machine condition
monitoring; rotational analysis; acoustic test; modal test; as well as general purpose high speed
digitization and signal analysis.
F
EATURES
Optimized Performance
Measurement performance is elevated to new levels with up to 625 k samples / second / channel
data rates, true differential inputs with superior common mode performance (CMRR of -120 dB)
reducing unwanted noise and interference, an industry leading spurious free dynamic range (SFDR
of -125 dB) offering exceptional measurement fidelity, and uncompromised IEPE excitation
flexibility, fully programmable from 2 mA to 20 mA, to maximize transducer performance and
response. Industry-leading -125 dB spurious free dynamic range (SFDR) is a key measure of the
superior measurement fidelity provided by this instrument
Self-Calibration
Runtime self-calibration ensures that instruments deliver the most accurate results possible by
compensating for ambient temperature fluctuations, without the need to disconnect field wiring.
This maximizes measurement accuracy across the entire measurement path using precision internal
voltage sources to validate and adjust coefficients. This eliminates inaccuracies generated by
internal circuitry temperature gradients. Embedded NIST traceable calibration eliminates lengthy
test system down-time, simplifies calibration processes, and reduces spare equipment requirements,
maximizing facility up-time and utilization with this completely automated embedded process. All
internal calibration can be performed in-place without removing instrumentation.
There are two BNC connectors in the rear panel of EMX-4016B/EMX4016M BoB; one for trigger
input and one for calibration output. The calibration output is used to calibrate the built-in calibration
signals used by the EMX-425X module to perform self-calibration. The trigger input is used for
trigger the digitizer by an external signal.
“Best-in-Class” Software
X-Modal is an experimental modal analysis software features intuitive task oriented user interfaces,
extensive modal parameter estimation algorithms, parallel display capabilities, flexible data
management, and unparalleled channel expandability. This software is MATLAB based open source.
