Exactly. The best is to test. I like the uBlox LEA-5T "user delay" to place the PPS where I want. Useful for our TICs (including in the list the HP5370A, the E1740A and the GT4000) that usually wrap around the second when the PPS under test "slides" under the reference.
On Thu, May 3, 2012 at 7:59 PM, Bob Camp <[email protected]> wrote: > Hi > > Quick check: > > 1) Fire up two TBolts, hook up a scope between the PPS's (trigger on A, > watch B) > 2) Change the antenna delay by +500 ns on B (needs to be N x 100 ns). > 3) Pulse moves early or late . If it moves early then it's compensating for > 500 ns of cable delay. > > Bob > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Mark Sims > Sent: Thursday, May 03, 2012 1:24 PM > To: [email protected] > Subject: [time-nuts] LadyHeather Cabledelay - positive or negative ? > > > The documentation says that you should use negative values to compensate > for > the cable delay, but all of my units were removed from service with > positive or zero delays set. Lady Heather sort of assumes positive values, > but you can enter negative ones. Which is correct remains a mystery since > I > don't have a trusty independent reference to compare to. > > > _______________________________________________ > 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. > _______________________________________________ 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.
