BAD MSG: xxxxxxx essage-ID: <[email protected]> X-Authentication-Warning: europe.std.com: daemon set sender to treg-approval using -f Organization: V Band Corporation Precedence: bulk List-Post: [email protected] Date: Mon, 28 Oct 96 19:06:53 +0000 Priority: normal X-Mozilla-Status: 8011 Content-Length: 2136
On Friday, 10/25/96, Murli wrote: > Hi, > > We are in the process of developing a high data rate modem on copper. (Not > involving the CO. Hence we do not have the 4KHz limitation). > > We need info. regarding the frequency response of standard copper cable > (24 - 18 AWG) at higher frequencies (Say 0 to 8 MHz). Could somebody help > in directing us to sites/books/journals? > > Thanks in advance, > > > Murli > __________________________________________________________________________ > Muralikrishnan G 3008, 12th B Main, HAL II stage > Silicon Automation Systems Bangalore India 560 008 > Ph: +91 80 528-1461, 1229 FAX: 5284396 > E-Mail: [email protected] > > __________________________________________________________________________ Murli, Many answers may be found in cable catalogs, and I will FAX you a few pages from two (Pilgrim & Beldon). Frankly, I find the catalogs more informative and up-to-date than the transmission textbooks. If you have any control over the choice of wire, I recommend that you use LAN cable which is classified in levels by EIA/TIA568. In general, this cable has been engineered for high-speed transmission, and is available in 22 and 24 AWG sizes, shielded and unshielded, plenum and non-plenum. (Plenum cable is designed to generate non-toxic fumes, should the cable in an air plenum over a false ceiling catch on fire. US building codes require plenum cable in this case.) Possibly the best of these cables for your application is level 5 cable designed for 4 and 16 Mbps token ring LANs. The specification requires less than 10.6 dB/1000 ft @ 10 MHz. If you have no control over the choice of cable...well, good luck! Pete ---------------------------------------------------------------------------- Peter Van Raalte | Email: [email protected] Compliance Engineer | V-Band Corporation | Phone: 914-789-5117 565 Taxter Road | Elmsford NY 10523 | FAX: 914-347-3432 ---------------------------------------------------------------------------
