Jun 28, 2001 #2 lkm Electrical Aug 15, 2000 20 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 Upvote 0 Downvote
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
Jun 28, 2001 #3 nbucska Electrical Jun 1, 2000 2,191 Wouldn't RF (with good directional antennas ) be cheaper ? <nbucska@pcperipherals.com> Upvote 0 Downvote
Jun 28, 2001 #4 robertjo Petroleum Jun 26, 2001 21 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. Upvote 0 Downvote
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.
Jul 4, 2001 #5 Guest TWO Line Modems can deal with it . Of course U should add 4KM lines. Upvote 0 Downvote
