[time-nuts] Timing on Ethernet

[Poul-Henning Kamp]

In message <200708050858.47945.bob.paddock at gmail.com>, Bob Paddock writes:
>); SAEximRunCond expanded to false

>We found the best "waveguide" experience was in
>the range of 300 to 420 MHz, but the distance is very limited,
>hundreds of feet at most.  The main problem at different frequencies
>is the material becomes absorptive at lower frequencies,
>or reflective at higher frequencies causing to much mutilpath
>distortion.

Most mines are in coal or metalrich rock, wouldn't that make
your experience more pessimistic than the tunnels at CERN which,
as far as I remember, is in pretty 'worthless' rock ?

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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