Tim Shoppa wrote: > John Ackermann N8UR <[EMAIL PROTECTED]> wrote: > >> But we're time-nuts... we DO worry about those things. :-) >> >> While we were at it with the network analyzer, we did FDR (frequency >> domain reflectometry) to measure the cable delay to the antenna, and I >> spent yesterday making up six matched cables to go from the splitter to >> the receivers -- they all test within about 1 nanosecond of each other. >> >> Obsessive compulsive? Me? >> > > At the lab I worked at in the 80's, all the cables hanging on > the wall-racks were calibrated and labeled in nanoseconds. > > But... after the ECL signals got turned into TTL, we just didn't > care anymore :-). > > Tim. > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > John
Your not quite obsessive enough. The cable delays (including the antenna to splitter cable) should also be a multiple of half the signal period to minimise the effects of residual mismatches at either end of the cable. Bruce _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
