COM21 (CMTO) Message Board

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 : COM21 (CMTO)

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: Mark Laubach who wrote (1823)	2/22/2000 3:18:00 PM
From: Dennis O'Bell	Read Replies (2) of 2347

Mark, perhaps you can answer these - How much of an impediment is the use of CDMA to the use of spectrally efficient (ie trellis coded) modulation? Since I don't know the details of the spreading codes used by Terayon, I don't know how to find this out myself. Do you have any thoughts about DMT/OFDM as alternatives in the cable plant? These (they're effectively the same thing) are effective against narrow band interference, probably better than CDMA for this purpose. This is mainly in theory, I don't know of anyone building the hardware for cable modems at the moment. Finally, if a channel is too noisy to support 64 or 246 QAM, or even 16 QAM, how bad would analog NTSC be? From what I've see on cable, this can be pretty bad! I think I've detected some confusion between the downstream and upstream signals in these threads, I'm curious mainly about downstream.

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next