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 : Silkroad -- Ignore unavailable to you. Want to Upgrade?

To: Webster Groves who wrote (33)	11/11/1998 1:30:00 PM
From: ahhaha	Read Replies (1) \| Respond to of 626

The dielectric preparation may be where Palmer makes the quantum leap. The photodiode though is where the quantums are quickly leaping. The diffraction module is a very significant development too. The IF bandwidth utilized is 9%. You can send 8.4 gHtz encoded in a 100 millisecond pulse. From the web site: While the laser beam SilkRoad's technology uses is similar to that used in DWDM, our innovation does not require the tuned cavity on the laser (required to provide a specific wavelength). Instead, SilkRoad's system collects the channels (typically OC48 ) before they are introduced on the modulator. Customers can then input many OC3 through OC48 type signals using only one wavelength of light, either 1310 nm or 1550 nm or both. By stacking a set of data channels in a four-dimensional optical space, this technology is modulated onto the optical beam using an external optical modulator. SilkRoad's technology encapsulates this external optical modulator, external clock frequency generation/modulation and femtosecond photodiode: External clock frequency generation and modulation provides address-specific discretization at the receiving mode. The "Palmer Reverse Thermal Wave Laser Transform Control" (PLTC) generates an extremely narrow linewidth of approximately one angstrom. The "Diffraction Module," designed by Dr. Palmer, is an optical analog of an electronic multiplexer. A femtosecond (one-quadrillionth of a second, 10-15) photodiode was perfected by SilkRoad

To: Webster Groves who wrote (33)	11/15/1998 10:28:00 AM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 626

>>... how much bandwidth does a single TV channel take ? Let's be generous and say 10 MHz. Multiply that by 840 channels (you do the math) and we get 8.4 GHz total bandwidth. Where does the 93 GHz come in ? Perhaps that's the center frequency of the IF modulator; so the fractional IF bandwidth used is 9 %. What's so dramatic about that? Maybe they used 840 televisions all at once? << Several things about your observations, and about the premise that SR employed: Typically, TV channels on cable systems take ~ 6 KHz ea. Digitized video, if it is NTSC quality would result in somewhat more than 45 Mb/s, uncompressed, maybe as much as more than 100 Mb/s depending on the modulation and encoding schemes used. For compressed video suitable for commercial delivery over many cable systems we might view this as being sent at a reduced digital rate of 45 Mb/s. I believe that what you have done is a common mistake, and that is to confuse MHz with Mb/s. If you take the compressed video signal at 45 Million bits/sec and multiply it by 840 channels, we wouldn't get what the company claimed, but it's up there: 840 * 45 Mb/s = ~38 Gb/s. If this were actually uncompressed, then, or nearing HDTV transmission speeds compressed, we'd reach their claim or surpass it, of roughly 90 or 100 Gb/s, again, depending on the encoding scheme. But why use TV signals? Video is ultra forgiving of errors in transmission due to the poor accounting of the human eye, as is audio for the ear. I would think that a more convincing argument, albeit a more boring one, would have included some means of attesting to the accuracy of the received data... such as using a bit error rate measurement arrangement with an Andersen CPA standing by taking notes, like they do with the state lottery results. Nah... nothing glitzy there. One potentially good thing about this whole affair, is that Malone may have at last had an opportunity to witness what 500 or more channels actually looks like. ;-)