data transmission

• Jun 28, 2001

• #2

lkm

Electrical

Aug 15, 2000

20

HK

You can buy a fiber modem to transmit your signal by fiber optics. It is expensive for both fiber modem and optical fiber.

I never tested before but it sounds you can use the RS-485 interface with twist cable to transmite low baud rate to 4KM. You may need some repeaters.

I hope it help

 

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• Jun 28, 2001

• #3

nbucska

Electrical

Jun 1, 2000

2,191

US

Wouldn't RF (with good directional antennas ) be cheaper ? <nbucska@pcperipherals.com>

 

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• Jun 28, 2001

• #4

robertjo

Petroleum

Jun 26, 2001

21

US

Two words, Spread Spectrum. You can get a relativly cheap pair of radios in the ISM spectrum to accomplish this task. Take a look at

http://www.adaptivebroadband.com.

I have used their 900Mhz radios in the past for slow speed data and they worked great. Other manufacturers have similar products, do a search and see what comes up.

 

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• Jul 4, 2001

• #5

Guest

TWO Line Modems can deal with it .
Of course U should add 4KM lines.

 

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