Will a Remote Extender work my cable TV box? It gets confusing because NTL has taken over Cable & Wireless but for a long time it looked like C&W would take over Telewest. Anyway here are the current cable boxes:- - C&W (now NTL) - DiTV1000
- Telewest - Di1000T
- NTL - Di4001
Here's the point I'm trying to make:- The C&W and Telewest boxes use almost identical hardware although the software differs. Both use an IRDA IR remote and a DOCSIS cable modems. The NTL box is completely different and uses a conventional remote control and a DAVIC cable modem. As for remote extenders you should be OK with an NTL box unless it is NTL that was C&W. The Telewest and C&W that was - both require an IRDA compatible remote extender system. (Most remote extenders DO WORK with the SCIENTIFIC ATLANTA CATV Converter Model 8602 that was provided by NTL) The following explains the differences with the IRDA remotes. The system used was chosen by the network providers and is a high speed system that gives some "future proofing" of the design . The system is designed for remote keyboard use ( Web browsing ) and to enable multiple handset to be used " simultaneously " as required when playing games . This is because at some time in the near future the network providers may offer these services . "Normal" handsets use a system of modulating (switching on and off ) a carrier signal. The normal frequency of the carrier being in the range of 35kHz to 60 kHz. The system used by Pace is based on the IRDA standard that has been designed to enable computer peripherals to be linked without cables. ( This is not surprising as modern digital cable set top boxes contain a powerful micro processing systems and the Pace boxes are the first to also provide an integrated cable modem within the box.) The handset data is transmitted as discrete pulses of IR - it is not carrier based. The pulse rate is approximately 115 kHz. The handsets have identification keys / tabs that enable the receiver to identify the handset. Each key sends a 7 byte package of data within 600 uSec ( the same time that is taken to send only 1 or 2 bits of information with the normal system ). This allows the data to be sent very quickly thus freeing time for a second handset to jump in . The receiver software also adds a time stamp to the data to enable the games programmes to decide which handset responded first. The system and protocols used are covered by patents. I hope this allows you to decide whether your particular cable box is compatible with the Powermid XL and similar products. :o) If in doubt, use the DIGIEYE instead. This is IRDA compatible. Obsolete. Send this page address - CLICK HERE - to a friend !  Copyright ©1998-2011 Martin Pickering Version 1.1 updated on July 11, 2011 This file may be downloaded for private and personal use but NO part of it may be published in any form without the prior permission of the author. Send this page address - CLICK HERE - to a friend ! |