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Product Name: LXI Test
Product Description
 What is LXI?
It is an acronym for LAN eXtensions for Instrumentation. LXI builds on industry
standards, particularly those supported by the IEEE, to provide a standardized
method controlling instruments and other devices through a LAN interface and at
the same time provide a capability similar to or exceeding the IEEE488 standard.
Where can I get copies of the LXI standard?
A publicly available version is available on the LXI web site www.lxistandard.org
. Copies of working documents are available by joining the LXI Consortium.
Joining the Consortium allows companies to actively participate in the creation
and the promotion of the standard and gives access to other companies experience
in implementing the standard.
Who is supporting LXI?
Virtually all the leading companies in Test and Measurement are supporting the
LXI standard. A membership list can be obtained form the LXI Consortium web
site.
What is different between LAN instruments and LXI?
There are instruments available that have LAN interfaces that are not LXI
compliant. They behave in proprietary ways and all the legacy LAN instruments
tested initially failed some aspect the LXI specification, highlighting the
advantages of adopting an industry standard.
Does LXI compete with PXI?
Only to a very limited extent. The architectures are quite different and
consequently each will find their own market place where they offer the best
solution.
How does the speed of LXI and PXI compare?
To a great extent this is not a useful question. In PXI modules generally
transfer data to a PC for analysis, the architecture requires the transfer to be
made quickly in order for the system emulate traditional instruments. In LXI
most instruments will internally process data and simply supply a result, so the
amount of traffic is much lower. If speed is an important criteria it should be
judged not on bus speed but on the speed of the overall system when it performs
the required task.
What happens if I disconnect an LXI device or turn it off?
No a lot. The LAN connection has been specified to ensure that just like modern
IT products the LXI device will recover from the event and will not cause the
LAN system to misbehave.
Can I use wireless connectivity?
Wireless links can be included in the network, but at present the standard does
not support a direct wireless connection to an LXI device.
How does LXI support triggers?
LXI has a consistent definition of triggers based on an 8 channel model.
Triggers can be generated over the LAN interface, the web interface, can be
timed events based on IEEE1588 or use the wired trigger bus.
What is IEEE1588?
IEEE1588 defines a method of synchronising time, in this case over a LAN
interface. A system supporting IEEE1588 has a common sense of time that can be
used to define (in time) when an action (trigger) needs to occur or when an
event occurs (time stamp). The time stamp can be used to align data in several
devices. The operation of IEEE1588 on Class A and B devices is transparent to
the user once it has been set up.
What are the LXI Classes?
The most basic class of LXI device is Class C which supports the physical,
programmatic, LAN and web parts of the standard. Class B devices additionally
support IEEE1588 and the triggering model, Class A devices additionally support
the wired trigger bus.
What is the wired trigger bus?
It is a cable based link using standard connectors between Class A LXI devices
that provides 8 channels of triggering. The physical link uses Multi-drop LVDS
signalling to provide a highly deterministic method of exchanging hardware
triggers between devices.
Are there security issues with LXI?
There could be but these have to be addressed in the same way as other IT
products that exist on LAN's. In most cases corporate IT policy will encourage
test systems to use their own LAN with external connectivity controlled in
accordance with modern security practice.
Is Test Community really behind LXI?
Almost the whole test is behind LXI, 39 companies (at Oct 05) have now joined
the LXI consortium: Aeroflex, Agilent Technologies, Keithley Instruments,
Measurement Computing (a National Instruments company), Pickering Interfaces,
Racal Instruments (an EADS company), Rohde & Schwarz, VXI Technology.
Anritsu, Bruel & Kjaer. ADLINK Technology, Analogic Sky, BAE Systems,
California Instruments, Complete Networks, Elgar, Fluke, Goeple, IOTech (a
National Instruments company), Lambda, Pacific Power Source, Phase Matrix,
Teradyne, The Math Works, Universal Switching, Venture Design Services, ZTEC.
Acqiris, Advantech, AMREL, Corelis, Data Translation, Department of Defense (DoD),
Electronic Systems Innovation, Kepco, Pacific MindWorks, Shaanxi Hitech, Symtx,
Yokogawa Electric
Company Details
- January 1968. Pickering Electronics started by John Moore to design and
manufacture high quality reed relays for use by Original Equipment
Manufacturer's in switching systems.
- 1973. Pickering Electronics are... more
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