This question concerns a NEBS and EU test setup. This is not a direct compliance question but it supports an EUT compliance test setup.
It appears to me that E1 and T1 systems can be extremely susceptible to noise. I have a question concerning a T1 100 ohm balanced twisted pair cable being used in an E1 system. The application of this T1 cable is to replace the (hard to find) E1 120 ohm twisted pair cable to provide a transport of data to the E1 system through a Fireberd. I notice that under this application the Fireberd shows results of random BERs. a similar set-up using T1 cable in a T1 system runs without BERs. It appears to me that the T1 cable in the E1 system is noisy or there is crosstalk. When the cable is motionless, there are usually errors but, sometimes there are not. When the cables are moved, there are BERs and FRAME loss. Is there a large difference between the two cables due to their different impedances creating an impedance mismatch which produces noise or what? Thanks in advance, > Michael S. Davis > Compliance Engineer > C-C0R.net > Tel: 203.630.5788 > Fax: 203.630.5762 > [email protected] > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
