Re: [ntp:questions] GPS Trimble Acutime Gold - USB Interface
Hi Harlan, Trimble native serial GPS was discontinued. I just received the device without opportunity to choise other. Yes, I have seen the support page about Trimble/Palisade but I could not find any thing to justify the reported problems. offset now ~ 150ms :( Thanks, Pedro On Fri, Dec 19, 2008 at 7:27 PM, Harlan Stenn wrote: > Pedro, > > First, USB serial devices generally have a *lot* of jitter on them. > > Second, have you seen: > > http://support.ntp.org/Support/ConfiguringTrimblePalisadeAcutimeRefclocks > -- > Harlan Stenn > http://ntpforum.isc.org - be a member! > > ___ > questions mailing list > questions@lists.ntp.org > https://lists.ntp.org/mailman/listinfo/questions > ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] GPS Trimble Acutime Gold - USB Interface
I see this has an event capture input. Has anyone tried using this vs bringing in the pps to see if they can lower the jitter on interrupt handler? -Original Message- From: questions-bounces+gdowd=symmetricom@lists.ntp.org [mailto:questions-bounces+gdowd=symmetricom@lists.ntp.org] On Behalf Of Harlan Stenn Sent: Friday, December 19, 2008 3:43 PM To: Pedro Torres Cc: Harlan Stenn; questions@lists.ntp.org Subject: Re: [ntp:questions] GPS Trimble Acutime Gold - USB Interface Hi Pedro, You will be in good shape with USB serial if you can find some other way to get a PPS signal into your box. H -- > Hi Harlan, > > Trimble native serial GPS was discontinued. I just received the device > without opportunity to choise other. > Yes, I have seen the support page about Trimble/Palisade but I could > not find any thing to justify the reported problems. > offset now ~ 150ms :( > > Thanks, > Pedro > > > On Fri, Dec 19, 2008 at 7:27 PM, Harlan Stenn wrote: > > Pedro, > > > > First, USB serial devices generally have a *lot* of jitter on them. > > > > Second, have you seen: > > > > http://support.ntp.org/Support/ConfiguringTrimblePalisadeAcutimeRefclock s > > -- > > Harlan Stenn > > http://ntpforum.isc.org - be a member! > > > > ___ > > questions mailing list > > questions@lists.ntp.org > > https://lists.ntp.org/mailman/listinfo/questions > > ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] GPS Trimble Acutime Gold - USB Interface
Hi Pedro, You will be in good shape with USB serial if you can find some other way to get a PPS signal into your box. H -- > Hi Harlan, > > Trimble native serial GPS was discontinued. I just received the device > without opportunity to choise other. > Yes, I have seen the support page about Trimble/Palisade but I could > not find any thing to justify the reported problems. > offset now ~ 150ms :( > > Thanks, > Pedro > > > On Fri, Dec 19, 2008 at 7:27 PM, Harlan Stenn wrote: > > Pedro, > > > > First, USB serial devices generally have a *lot* of jitter on them. > > > > Second, have you seen: > > > > http://support.ntp.org/Support/ConfiguringTrimblePalisadeAcutimeRefclocks > > -- > > Harlan Stenn > > http://ntpforum.isc.org - be a member! > > > > ___ > > questions mailing list > > questions@lists.ntp.org > > https://lists.ntp.org/mailman/listinfo/questions > > ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
Re: [ntp:questions] GPS Trimble Acutime Gold - USB Interface
Pedro, First, USB serial devices generally have a *lot* of jitter on them. Second, have you seen: http://support.ntp.org/Support/ConfiguringTrimblePalisadeAcutimeRefclocks -- Harlan Stenn http://ntpforum.isc.org - be a member! ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
[ntp:questions] GPS Trimble Acutime Gold - USB Interface
I have a Trimble Acutime Gold GPS[1] and I got some problems installing that device in both FreeBSD and Linux. That GPS has an USB Interface with FTDI support. FreeBSD configuration: 1) kldload uftdi 2) dmesg: ucom0: on uhub3 ucom1: on uhub3 3) ln -s /dev/cuaU0 /dev/palisade0 (I tried cuaU1 with no success) 4) ntpd.conf configured without event polling [2]: # The Primary reference server 127.127.29.0 # Trimble Palisade GPS. # Set packet delay fudge 127.127.29.0 time1 0.020 # and set flag2 to turn off event polling. fudge 127.127.29.0 flag2 1 First problem: For some reason event polling (fudge options commented) does not work. The GPS turn unreachable. Second problem: My GPS is a falseticker: $> ntpq -np remote refid st t when poll reach delay offset jitter == x127.127.29.0.GPS.0 l3 16 3770.000 -45.446 21.072 *192.168.193.5 .GPS.1 u 50 6434.849 110.134 7.145 192.168.192.61 192.168.193.52 u 48 6436.084 110.903 9.221 +192.168.254.229 192.168.0.42 2 u 49 643 11.550 110.253 7.524 I appreciate any help. [1] http://www.trimble.com/timing/acutime-gold-gps-antenna.aspx?dtID=overview [2] http://doc.ntp.org/4.1.2/driver29.htm -- Pedro ___ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
