Railroad tracks on 4mhz.
ShawnLG, Thu Aug 16 2007, 04:25AMDoes any hams know what it is?
The white dotted lines are one min divisions.
Re: Railroad tracks on 4mhz.
Dave Marshall, Thu Aug 16 2007, 12:03PM
Looks to me like FSK of some sort. Is it audible? It doesn't look like its quite loud enough to be.
Dave
Dave Marshall, Thu Aug 16 2007, 12:03PM
Looks to me like FSK of some sort. Is it audible? It doesn't look like its quite loud enough to be.
Dave
Re: Railroad tracks on 4mhz.
teslaguy, Tue Sept 04 2007, 02:00PM
One of my mothers companies is located on the grounds of a major railroad in the northeast and their telecom system uses microwave transmission towers as opposed to landlines. Hence they have to dial into the network using aol as opposed to a t1 that they have at other locations. I know not all railroads use microwave transmission for communications but if you are noticing rail road tracks with a 4mhz signal. chances are you're tresspassing on the property of one who does. I hope that helps and sorry for being vague....Im just not supposed to know that i think. The reason why they put them up supposedly was i think like 30 years ago to save money on copper.
teslaguy, Tue Sept 04 2007, 02:00PM
One of my mothers companies is located on the grounds of a major railroad in the northeast and their telecom system uses microwave transmission towers as opposed to landlines. Hence they have to dial into the network using aol as opposed to a t1 that they have at other locations. I know not all railroads use microwave transmission for communications but if you are noticing rail road tracks with a 4mhz signal. chances are you're tresspassing on the property of one who does. I hope that helps and sorry for being vague....Im just not supposed to know that i think. The reason why they put them up supposedly was i think like 30 years ago to save money on copper.
Re: Railroad tracks on 4mhz.
Steve Conner, Tue Sept 04 2007, 02:04PM
I think he meant that the signal looked like a pair of railroad tracks on his analyzer display: not that real railroad tracks were somehow involved.
Steve Conner, Tue Sept 04 2007, 02:04PM
I think he meant that the signal looked like a pair of railroad tracks on his analyzer display: not that real railroad tracks were somehow involved.
Re: Railroad tracks on 4mhz.
atomicthumbs, Mon Nov 05 2007, 09:26PM
atomicthumbs, Mon Nov 05 2007, 09:26PM
halomaster2004 wrote ...
One of my mothers companies is located on the grounds of a major railroad in the northeast and their telecom system uses microwave transmission towers as opposed to landlines. Hence they have to dial into the network using aol as opposed to a t1 that they have at other locations. I know not all railroads use microwave transmission for communications but if you are noticing rail road tracks with a 4mhz signal. chances are you're tresspassing on the property of one who does. I hope that helps and sorry for being vague....Im just not supposed to know that i think. The reason why they put them up supposedly was i think like 30 years ago to save money on copper.
One of my mothers companies is located on the grounds of a major railroad in the northeast and their telecom system uses microwave transmission towers as opposed to landlines. Hence they have to dial into the network using aol as opposed to a t1 that they have at other locations. I know not all railroads use microwave transmission for communications but if you are noticing rail road tracks with a 4mhz signal. chances are you're tresspassing on the property of one who does. I hope that helps and sorry for being vague....Im just not supposed to know that i think. The reason why they put them up supposedly was i think like 30 years ago to save money on copper.
Re: Railroad tracks on 4mhz.
asabase, Thu Feb 28 2008, 01:22AM
Looks like some really low bit rate FSK signal. *Lots* of companies use wireless links for data transmission. At this low bit rate I doubt is is anything more than a status indicator or control interface.
asabase, Thu Feb 28 2008, 01:22AM
Looks like some really low bit rate FSK signal. *Lots* of companies use wireless links for data transmission. At this low bit rate I doubt is is anything more than a status indicator or control interface.
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