I don't claim to be able to do the math, but one could probably easily calculate it from the Fourier frequencies by looking at the attenuation by frequency over a 1km lengh: Loss per 100m over frequency: 10M 100M 400M 1300M 2300M 7dB 14dB 28dB 49dB 72dB So looking at these numbers I am guesstimating a risetime in the us alongside a good handful of microseconds of propagation delay. bye, Said In a message dated 9/15/2014 11:31:28 Pacific Daylight Time, [email protected] writes:
> Also, another issue with the end termination happens when driving very long > coax cables: RG-142 for example has about 60 Ohms center conductor > resistance and 7.5 Ohms shield resistance at 1km length. RG-142 is far from low-loss. Does anybody use it at that length? What's the rise time at the end of 1 km with a 1 ns rise time at the input? -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
