Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : AUTOHOME, Inc -- Ignore unavailable to you. Want to Upgrade?

To: gpowell who wrote (23011)	6/6/2000 3:42:00 PM
From: Frank A. Coluccio	Respond to of 29970

gp, what you've described has been the bane of the industry's existence, all along. This is why TERN has gone after those systems who use coax exclusively (non-fiberized), although they also address the needs of HFC systems. TERN's "original" claim to fame was their use of CDMA, or in TERN's case, S-CDMA, due to its ability to perform with fewer errors (they claim) in the presence of such noise as you described. Of course, this s-cdma does little, probably detracts due to a penalty that would ensue price-performance-bandwidth-wise, for a well-designed system with short coax loops. So, for this reason they also accommodate the latter HFCs through oem'ed units, I believe, which are docsis compliant, or in some cases compliance aspirant (if not ascendant <g>). But, as you point out, the low end of the spectrum below 40 MHz is chock full of all forms of ills (ingress), and that is precisely where the upstream from your modem goes. Since this is noisy, and limited in width, it's not unheard of that this would take some trial and error on the part of the cable technicians on the older systems to find an acceptable region in the spectrum for the upstream direction. Often considerable tuning and "gold-plating" of the connectors, power supplies, cable sections and amplifiers/equalizers takes place at the time the service if first turned up. And then, as you noted, it becomes an ongoing and routine maintenance issue. FAC