FAQ
FAQ:
Can we test xDSL modem technology by emulating signal loss of the telephony pairs with so-called signal line-loss attenuators?
Answer :
No. Signal line attenuators are filters: they are not simulating a real telephony copper pair. Parameters like 'delay' and 'complex impedance' are not simulated with signal attenuators, and thus test results of tests executed with signal attenuators are not representative for the real world performance. In production or for a quick CPE-DSLAM software test one might use though a signal line attenuator. In the SI catalog the signal attenuators are listed under the 'DLA'-product range. The full blown xDSL Line and Loop Simulator are listed under the 'LSX'-product range. The most popular and well known LSX in the Broadband Industry is the xDSL Multi-Standard Interop and Performance Compliance Verification Reference LSX 2030V. Warning ! one American vendor confuses people on his website with the term 'line simulators' while the announced test products are ordinary low-cost signal line attenuators.
FAQ:
Is Sparnex Instruments test platform for certifying CPE's or for certifying DSLAM 's according applicable International Standards?
Answer :
Both. Software interaction between SI test platforms and DSLAM's requires vendor specific DSLAM drivers that are part of the SI product portfolio.
FAQ:
Can we do maximum transmission and speed performance tests of modems, CPE's, Gateways, DSLAM's, DPU's, ... with any type of copper cable?
Answer :
Yes! Copper wirelines, twisted pair, telephony cables, Ethernet cables, industrial cables, pole mounted cables, coaxial cables, electricity cables, railway cables, undersea cables ... The electrical characteristics of the cable type under study are measured and modeled. This model is programmed in the system and will be electrically regenerated with the LSX test platforms at any wanted length in order to reproduce exactly the cable type and noise for any modem performance and rate-reach test. This way the expected performance can be verified, tested and approved in the laboratory upfront the roll-out/installation of modem systems in the field (ground, air, vehicle, cabinet, sea ...).
FAQ:
Can we configure the Sparnex Instruments Physical Layer Test and Simulation system according our own network characteristics and network topology?
Answer :
Yes. The system can be programmed for any network type and any (yet deployed) legacy service in order to test the effect of new services and new modems on the -yet existing- legacy network upfront roll-out and mass deployment of new products and technologies.
FAQ:
What is the noise floor of LSX test systems?
Answer :
Depending on the type of technology that is to be tested the noise floor varies from -145 dBm (ADSL-VDSL) to -155 dBm (G.fast) which is typically 10 % better than the noise level as set in the International Standards.
FAQ:
What is the dynamic range of the LSX Physical Layer Simulation and Test systems?
Answer :
Depending on the type of technology that is to be tested the dynamic range varies from 95 dBm (ADSL-VDSL) to 80 dBm (G.fast) which outperforms any other test and simulation system.
FAQ:
What is the by-pass crosstalk of the LSX Physical Layer Simulation and Test systems?
Answer :
Depending on the type of technology that is to be tested the by-pass cross talk varies from -110 dBm (ADSL-VDSL) to -90 dBm (G.fast) which outperforms any other test and simulation system.