Hi If you have one *good* sat, it should stay out of holdover.
Bob On Sep 20, 2013, at 9:01 PM, Paul Berger <phb....@gmail.com> wrote: > Hi: > > My Nortel unit seems to go into holdover when LH is still reporting one > usable satellite. When doing a survey it would go into holdover below four > because I believe it is doing 3D position samples which would require four. > > On a related note I picked up some 110 pin Z-Pack connectors, that would fit > these units, cheap and I have four extras I don't have any use for and will > offer then here free, one per customer, to the first four people who send me > a private email. If postage is expensive to where you are from eastern > Canada I may ask you to pay for the postage. > > Paul. > > On 9/20/13 7:22 PM, Bob Camp wrote: >> Hi >> >> If the unit is dropping into holdover, something is wrong with the number of >> sat's it's seeing. If you have saved a location properly, it will only go >> into holdover when it's got zero sats. If it does not believe it's got a >> proper location it will drop into holdover when it goes below 4 sats. The >> number of sats visible isn't what counts here, it's the number that are >> locked up, above the elevation mask, and above the AMU threshold. Set either >> the elevation or the AMU to high and you will go in and out of holdover. >> >> Bob >> >> On Sep 20, 2013, at 2:13 PM, quartz55 <quart...@hughes.net> wrote: >> >>> I was thinking of keeping a couple of batterys floated across the supply, >>> since it will run on 24V. I'll have to figure out what I'll need for maybe >>> 2 hours. Not sure what it's drawing now at 30V, but wouldn't be hard to >>> measure. >>> >>> Couple more things. >>> >>> What is the foliage filter and will it work on the Nortel? >>> >>> I keep seeing my holdover going up but haven't seen any sat drop out or >>> yellow light on the front. Is there any way to re-set the holdover without >>> turning the unit off? It's up to 468 now, not sure where it started the >>> other day but probably in the 200's. I may be dreaming too. >>> >>> I've dropped the idea about choke ring or ground planes after reading what >>> I could about it. I may try building my own turnstile antenna (ala K7KKQ) >>> and amp just for fun. Amps are cheap from Mouser and have less than 2 dB >>> NF unlike mine which is 4 dB. Has someone made a DIY helix? I liked the >>> pinwheel antenna but it may be hard to make. >>> >>> Dave >>> ----- Original Message ----- >>> From: Charles Steinmetz >>> To: Discussion of precise time and frequency measurement >>> Sent: Friday, September 20, 2013 1:01 PM >>> Subject: Re: [time-nuts] New NTBW50AA >>> >>> >>> Dave wrote: >>> >>>> We have plenty outages here, so I may look into a UPS of some sort >>>> but I have a rather large generator that I always turn on after >>>> about 1/2 hour or so. >>> The UPS is to keep master oscillators (and for some of us, ovenized >>> voltage standards) running uninterrupted from the time of the failure >>> until the generator is running. Best practice is to use a "double >>> conversion" UPS to avoid even a short outage as it kicks in. >>> >>> Best regards, >>> >>> Charles >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
