Darac & others, From: Darac Marjal <mailingl...@darac.org.uk> Date: Thu, 10 Jan 2013 16:14:59 +0000 > I was rather meaning how much the signal is attenuated between the > sender and receiver.
My hypothesis. ... For the receiver to know the attenuation from the tranmitter, the header of each frame would have to contain a number representing the transmitted power. Than assuming the receiver knows the received power, it can calculate power attenuation. Of course, received power is not necessarily received information. In http://en.wikipedia.org/wiki/Ethernet_frame there is no mention of transmitted power. I suppose it might be hidden in a lower layer but probably this information and calculation just do not exist. The header has a frame check sequence and retransmission of a corrupted frame can occur. So the receiver can know how many bad copies arrived before a good copy. That might be incorporated into the signal quality calculation. > However, doing a quick bit of searching suggests that the whole "link > quality as a percentage" thing is more like voodoo: ... That was my suspicion. Thanks for the references. Regards, ... Peter E. -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 12 Tel +13606390202 Bcc: peasthope at shaw.ca http://carnot.yi.org/ "http://members.shaw.ca/peasthope/index.html#Itinerary " -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/171057898.38779.26924@cantor.invalid
