2|ni.com |NI PXIe-4464 Analog Input Getting Started Guide
Furthermore, any modifications to the product not expressly approved by National Instruments
could void your authority to operate it under your local regulatory rules.
Caution To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Caution Mini-XLR version only—To ensure the specified EMCperformance, the
length of all I/O cables must be no longer than 3 m (10 ft).
Caution BNC version only—Electromagnetic interference can adversely affect
the measurement accuracy of this product. The construction of a BNC coaxial cable
is inherently unbalanced in that the outer conductor (LO) is used as a shield for the
innerconductor(HI).However,for functional reasons, thereis no input configuration
of the NI PXIe-4464 that directly connects the LO terminal to the chassis ground.
Without a direct connection to chassis ground, the outer conductor does not act as a
shield for unwanted noise and may act as an antenna for coupling noise into the
module inputs. For single-ended measurements, the noise immunity for the system
can be improved by directly connecting the outer conductor to the chassis or earth
ground at the load end of the cable. For differential measurements, where such a
connection is inherently not possible, the BNC cable can alternatively be wrapped in
a separate grounded shield. In addition, you might need to use snap-on ferrite beads
or other remedial measures to improve electromagnetic compatibility.
Unpacking
The NI PXIe-4464 module ships in an antistatic package to prevent electrostatic discharge from
damaging module components. To prevent such damage when handling the module, ground
yourself using a grounding strap or by holding a grounded object and complete the following
steps:
1. Touch the antistatic package to a metal part of the grounded object before removing the
module from package.
2. Remove the module from the package and inspect the module for loose components or any
other sign of damage.
Notify NI if the module appears damaged in any way. Do not install a damaged module into your
system. Store the module in the antistatic package when not in use.
Preparing the Environment
Ensure that the environment you are using the NI PXIe-4464 in meets the following
specifications.
Operating ambient temperature ........................0 °C to 55 °C
(IEC 60068-2-1, IEC 60068-2-2)
Operating relative humidity..............................10% to 90%, noncondensing
(IEC 60068-2-56)
