Have you ever heard of the glock? it's not exactly made of any metalic content.
I'm sorry, but you aren't any better at checking your facts.
The polymer parts of a Glock are molded around the metal ones - the frame, barrel, chamber, and slide are made of good old steel. As such, it is readily detectable by metal detectors and is easily identifiable as a pistol in an x-ray machine.
I have a kind of philosophical question here. Was it right (and possibly legal) for DirecTV to physically destroy someone else's property?
The smart cards are actually DirecTV's property, and the back of the card states this. That way they have more freedom to replace them when they become outdated, which has happened at least once already. I remember getting a new card in the mail a couple of years ago with instructions on how to mate it to the receiver.
Example 108 MHZ - you have a maximum of 108Mbps if you were able to encode on every cycle of the carrier (impossible without generating nasty things)
Well, that's not necessarily true. Spectral efficiencies of >1 bps/Hz are commonplace. Your analog modem squeezes 33.6 kbps of data into ~3.3 kHz of bandwidth. Even lowly ISDN gives you a 160 kbps (raw) data pipe in 80 kHz of bandwidth.
Shannon's Law says that the more spectrally efficient your modulation technique is, the less noisy your transmission medium can be. That's why we can get away with ~11 bps/Hz on a high-quality POTS line (somewhere around 30 dB signal/noise ratio) but less so for much noisier wireless links, which are typically between 0.5 and 2 bps/Hz for mobile stuff and 3-4 bps/Hz for HDTV.
IANARA (... Radio Astronomer), but that sounds like they were using paralax to do stereo imaging. The new dish can probably do the same thing, except using the movable panels to shift the reflector (so it'll be quieter).
Actually, that's the subreflector that they install at the focal point to reflect signals down to a receiver (or receivers, I forget) at the bottom of the dish. I think it's for stuff that's too bulky to put out on the arm at the focal point.
When you think about it, that dish is just a really big parabolic reflector, and it works just as well for sound energy as it does for electromagnetic energy...
The movable surface panels are there to correct for deformations due to gravity and thermal effects; for effective observations at high frequencies the surface has to be perfectly shaped to within a ridiculous tolerance. I was a summer student there a few years ago working on the laser ranging system for the panels (they use the lasers for aiming, too).
What?!? CDMA systems use rake receivers to correlate the multipath signals. CDMA can use multipath to get a *better* signal - the same concept is behind the "soft handoff" feature of CDMA - instead of a hard switch from one cell to another, you can use both of them during the transition.
As far as the efficiency overstatement, yes, that was oversimplified, but an 80% improvement is still nothing to sneeze at, and that's the lowest credible estimate I've seen.
CDMA spread/despread and demodulation is pretty simple, actually. It's the power control that really bites you with complexity. The power control is what ensures that everybody's signal arrives at the cell at the same power level - without that the whole system would fall apart.
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I'm sorry, but you aren't any better at checking your facts.
The polymer parts of a Glock are molded around the metal ones - the frame, barrel, chamber, and slide are made of good old steel. As such, it is readily detectable by metal detectors and is easily identifiable as a pistol in an x-ray machine.
Well, that's not necessarily true. Spectral efficiencies of >1 bps/Hz are commonplace. Your analog modem squeezes 33.6 kbps of data into ~3.3 kHz of bandwidth. Even lowly ISDN gives you a 160 kbps (raw) data pipe in 80 kHz of bandwidth.
Shannon's Law says that the more spectrally efficient your modulation technique is, the less noisy your transmission medium can be. That's why we can get away with ~11 bps/Hz on a high-quality POTS line (somewhere around 30 dB signal/noise ratio) but less so for much noisier wireless links, which are typically between 0.5 and 2 bps/Hz for mobile stuff and 3-4 bps/Hz for HDTV.
Actually, that's the subreflector that they install at the focal point to reflect signals down to a receiver (or receivers, I forget) at the bottom of the dish. I think it's for stuff that's too bulky to put out on the arm at the focal point.
When you think about it, that dish is just a really big parabolic reflector, and it works just as well for sound energy as it does for electromagnetic energy...
The movable surface panels are there to correct for deformations due to gravity and thermal effects; for effective observations at high frequencies the surface has to be perfectly shaped to within a ridiculous tolerance. I was a summer student there a few years ago working on the laser ranging system for the panels (they use the lasers for aiming, too).
What?!? CDMA systems use rake receivers to correlate the multipath signals. CDMA can use multipath to get a *better* signal - the same concept is behind the "soft handoff" feature of CDMA - instead of a hard switch from one cell to another, you can use both of them during the transition.
As far as the efficiency overstatement, yes, that was oversimplified, but an 80% improvement is still nothing to sneeze at, and that's the lowest credible estimate I've seen.
CDMA spread/despread and demodulation is pretty simple, actually. It's the power control that really bites you with complexity. The power control is what ensures that everybody's signal arrives at the cell at the same power level - without that the whole system would fall apart.
That's odd. I have a 414 too, and it's worked flawlessly every time. I got mine this summer though - maybe it has newer firmware or something?