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| Thread ID: 29010 | 2003-01-07 21:58:00 | 802.11b Wireless PCI cards | Curly (487) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 111863 | 2003-01-07 21:58:00 | Do any come with a separate socket for an external antenna, or with no built in antenna at all ? Found several with internal antenna's but none so far for hooking in an external one. I have a mate who lives just over 100 Km away. Certainly 'not line of sight', but we figure that by using dedicated dish antenna's we just might receive a signal through reflection and or scattering of the radio signal. Who knows, we might just set up a distance record for 802.11b. Would be iteresting to try it. I understand that there is a group in Christchurch doing a similar thing, but believe they are using repeaters to carry the signal out further in range. Any info gladly received (pun not intended!!). |
Curly (487) | ||
| 111864 | 2003-01-07 22:05:00 | >I have a mate who lives just over 100 Km away. Surely you mean 100m? |
crozier (2004) | ||
| 111865 | 2003-01-07 22:58:00 | Hey Don't Wireless PCI Cards require a Wireless Hub so the PC's can communicate?? (kinda like a normal network), because doesn't the Wireless Hub have the ability to connect to a normal Hub so that resources can be shared over the network? *could be wrong though* Also, if it really is a 100Km distance between you and your mate, unless you want people with laptops and wireless cards from been able to access your resources, you might want to be a bit more security conscious. However, you may be able to get a Wireless Hub that allows you to plug in an external ariel, or atleast remove/unscrew one of the ones already in there and plug in your own one in. Other than that, let us know how you get on *very interested* CyberChuck |
cyberchuck (173) | ||
| 111866 | 2003-01-07 23:05:00 | > Hey > > Don't Wireless PCI Cards require a Wireless Hub so > the PC's can communicate?? (kinda like a normal > network), because doesn't the Wireless Hub have the > ability to connect to a normal Hub so that resources > can be shared over the network? > *could be wrong though* I think that's only to connect WLAN to LAN, but again, could be wrong.. |
Chilling_Silence (9) | ||
| 111867 | 2003-01-08 00:39:00 | You won't get a few tens of mW at 2.4GHz travelling 100 km. You won't even get a few MW at 2.4 GHz travelling 100 km :D. (I don't think you can even use troposcatter at that sort of frequency). The horizon has got you long ago at 100 km. :-( A few hundred metres is about the upper working limit set by the low power, unless you go to higher power units--- which would then require licencing. They would also be very expensive and get you a range depending on how high you can mount the aerials. I've got some boards which "need" external aerials ... they work OK in the same room from leakage from the SMA (or SMB --- I can never remember which it is) sockets on the backplate, or from a wee bit of wire tucked into the socket. I built an omni by soldering a 30 mm piece of a paperclip into the centre of a BNC socket and mounting that in the middle of a square aluminiom, so I could display the spectrum of my microwave oven. I couldn't get the right plug, so modified the other type (A or B) and crimped that to a BNC cable. |
Graham L (2) | ||
| 111868 | 2003-01-08 00:42:00 | As far as I know, many PCI cards will have an aerial socket (and a stub aerial) but less PCMCIA cards will have. Check before you buy. Dedicated PCI cards would be the most likely, not PCI adapters for PCMCIA cards The antenna connectors are likely to be a horrendous price, as will be the co-ax cable given the low losses needed for 2.4 GHz signal distribution. I would not expect much (any) joy at 100 kM, though. You would probably have more chance of success if you were running a couple of kilowatts and using supercooled low noise preamplifiers. There is not much in the way of scatter or propogation around the curvature of the earth at that frequency. |
godfather (25) | ||
| 111869 | 2003-01-08 01:12:00 | I think I saw the right connectors in the Farnell catalogue for about $15. (Horrendous, indeed ... but if you need them ...) I got the SMA one at Sicom for about $4, and used RG58 for a couple of metres. (A BNC is rated for 4 GHz). My cards had a retail price of $1000 each. :OI got 3 for $7.50 at an auction. :D(Either ISA or PCI ... it's a while since I've even thought about them). |
Graham L (2) | ||
| 111870 | 2003-01-08 01:44:00 | 802.11a is supposedly going to be on a "Out-Of-Bounds for other use" 5Ghz slice of airspace right? What do you guys know about that? Hmm... Just a thought, perhaps it was 802.11c not a, coz a comes before b in the alphabet? Im talkin about the next version of 802.11b!!! :D |
Chilling_Silence (9) | ||
| 111871 | 2003-01-08 02:00:00 | a, b, c . . . they are all designed for short distance, low power, unlicenced (that's important . . . no paperwork, but low power, so they won't interfere with other services) LANs . They are not designed to work at long distances . The physics affects the practical range: power (field strngth) and frequency (line of sight) . More power, and directional antennae give a bit more range . But the line of sight sets a limit . The power is limited by law . If you got a hundred of these cards (and computers), and put them on poles every km, with a solar panel to keep the computers going, and ran appropriate software on each, that might work . (You could need 5 times as many if the range is only 200 m . ) Until they were stolen . I think it might be cheaper to pay ISPs for connection at two points, or dial up and use telecom lines . |
Graham L (2) | ||
| 111872 | 2003-01-08 02:06:00 | Still, What type would you reccomend buying, for low-speed networking, over relatively short distance. 50-75 Meters is good. What sorta price are we looking at here to network 2 PC's or laptops? | Chilling_Silence (9) | ||
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