Hi Since you are going for time transfer, ping pong on a single channel should do pretty well. With some clever design you could locally receive your transmitted packet. You would drop out a lot of local "detuned coil" issues that way. A lot would depend on just how far you needed to stretch the link.
Bob On Mar 16, 2011, at 1:42 PM, Magnus Danielson wrote: > On 03/16/2011 02:25 PM, jimlux wrote: >> Or, you can send a signal between the two stations by an RF link. If I >> recall correctly, you'd need to compensate for propagation variations, >> but, a two way scheme might work for that. I think I have a paper >> somewhere that talks about how they did that for VLA. > > You need to either transmit at the same frequency alternating or transmit at > different frequencies, but dual frequency such that you can compensate for > any dispersion in order to aviod first grade dispersion errors. > > Also, care must be taken in calibrating the stations own contributions to > asymmetry. A de-tuned LC tank in the receiver path for one receiver for > instance shifts the delay asymmetrically. > > But done with some care you should be able to get fairly good results if you > pick suitable frequencies, have line-of-sight and similar "good" conditions. > > Cheers, > Magnus > > _______________________________________________ > 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. _______________________________________________ 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.
