Hi everyone I am hoping someone will have some information on how to unbrick a Garmin GPS 18x LVC? I was trying to rollback the firmware on the unit because I was experiencing similar issues to what is described here: https://satsignal.eu/ntp/Garmin-GSP18x-LVC-firmware-issue.htm The unit kept randomly dropping the configuration I set up on it. I could see no way to rollback the firmware from the current 4.00 to 3.90, so I renamed the 3.90 firmware to make it 4.10 (bad idea I hear you say). All seemed to go well with it erasing the previous firmware and installing the "new" firmware, but now I think I have bricked the unit as I am getting no response at all. Is there any way that you know of to reset the unit, perhaps by connecting two pins or something similar? Thank-you Anthony New South Wales Australia

Hi, I don’t know if you saw, but on the same page it is mentioned that it may un-brick itself after being left powered off for a long time - weeks. Hope you get it back. > Le 23 févr. 2019 à 09:41, Anthony Dunne <agdunne@hotmail.com> a écrit : > > Hi everyone > > I am hoping someone will have some information on how to unbrick a Garmin GPS 18x LVC? > > I was trying to rollback the firmware on the unit because I was experiencing similar issues to what is described here: > https://satsignal.eu/ntp/Garmin-GSP18x-LVC-firmware-issue.htm > > The unit kept randomly dropping the configuration I set up on it. > > I could see no way to rollback the firmware from the current 4.00 to 3.90, so I renamed the 3.90 firmware to make it 4.10 (bad idea I hear you say). > > All seemed to go well with it erasing the previous firmware and installing the "new" firmware, but now I think I have bricked the unit as I am getting no response at all. > > Is there any way that you know of to reset the unit, perhaps by connecting two pins or something similar? > > Thank-you > > > > Anthony > New South Wales > Australia > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. I am not a a vegetarian because I love animals. I’m a vegetarian because I hate plants.

Hi Everyone I am hoping one of you may be able to help with a specific problem? Some time ago, I purchased the excellent LeoNTP time server available here:- https://store.uputronics.com/index.php?route=product/product&path=60_70&product_id=92 It serves network time via NTP over Ethernet primarily but it also has PPS/1Mhz/10Mhz via a female BNC connector on the rear. I would like to connect the BNC output to a DB9 Serial input (female) on a machine running FreeBSD (pfSense) to provide PPS reference/accuracy to the NTPD running there. Firstly would this work? Secondly, my dilemma is the pin-out. I believe on the DB9 pin 1 is DCD (the actual pulse) and pin 5 is the ground. Is this correct? Could I use a cable such as this:- http://www.l-com.com/multimedia/eng_drawings/CTL4CAD.pdf even though pin five is not connected or would I need to use something like this:- http://www.l-com.com/multimedia/eng_drawings/CTL5CAD.pdf and make sure the pin 5/plug 5 is grounded in some way? Alternatively, is there a simpler way to achieve the goal? Sorry if this is vague but I would really appreciate some help on this :) Thank-you in advance Anthony New South Wales Australia

Quoting Anthony Dunne <agdunne@hotmail.com>: > Firstly would this work? Yes. > Secondly, my dilemma is the pin-out. > I believe on the DB9 pin 1 is DCD (the actual pulse) and pin 5 is > the ground. Is this correct? Yes. > Could I use a cable such as this:- No. > Alternatively, is there a simpler way to achieve the goal? No, you really need a level shifting stage that converts the PPS to RS232 levels. Tom

Hello Anthony, Those cables will NOT work.  The BNC connectors are 75 Ohms, which will damage the 50 Ohm connector on the server. Yes, pin1 is DCD.  You might need level shifting, but probably not. For the cable, just buy a cheap BNC cable and a DE-9 (sometimes erroneously called DB-9) connector.  Cut one end off of the cable, strip the outer jacket back a couple of centimeters, unravel then twist the braid, strip the white insulation back about 2 millimeters, and put some heat shrink on the braid so about 2 mm is showing.  Solder the center conductor to pin one and the braid to pin five.  Put a hood or some tape over the connector and you're done. Brent On 5/28/2019 9:28 PM, Anthony Dunne wrote: > Hi Everyone > > I am hoping one of you may be able to help with a specific problem? > > Some time ago, I purchased the excellent LeoNTP time server available here:- https://store.uputronics.com/index.php?route=product/product&path=60_70&product_id=92 > > It serves network time via NTP over Ethernet primarily but it also has PPS/1Mhz/10Mhz via a female BNC connector on the rear. > > I would like to connect the BNC output to a DB9 Serial input (female) on a machine running FreeBSD (pfSense) to provide PPS reference/accuracy to the NTPD running there. > > Firstly would this work? > > Secondly, my dilemma is the pin-out. > > I believe on the DB9 pin 1 is DCD (the actual pulse) and pin 5 is the ground. Is this correct? > > Could I use a cable such as this:- http://www.l-com.com/multimedia/eng_drawings/CTL4CAD.pdf > > even though pin five is not connected or would I need to use something like this:- http://www.l-com.com/multimedia/eng_drawings/CTL5CAD.pdf > > and make sure the pin 5/plug 5 is grounded in some way? > > Alternatively, is there a simpler way to achieve the goal? > > Sorry if this is vague but I would really appreciate some help on this :) > > Thank-you in advance > > > > Anthony > New South Wales > Australia > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. >

I don’t have one of these but I wouldn’t connect anything to anything without knowing the specs. I went to their site but could not find any specs on the outputs on the BNC connector. I should mail them at orders@uputronics.com for the details. It could be a simple BNC to DB9 soldering job. But there is something else to consider. What happens when there is a power cycle? Does the LeoNTP BNC output come up in the last configured state? Does it come up in OFF mode or with 10MHz? I doubt that your BSD box would appreciate 10Mhz. > Le 29 mai 2019 à 07:18, tom burkart <tom@aussec.com> a écrit : > > Quoting Anthony Dunne <agdunne@hotmail.com>: > >> Firstly would this work? > Yes. > >> Secondly, my dilemma is the pin-out. >> I believe on the DB9 pin 1 is DCD (the actual pulse) and pin 5 is the ground. Is this correct? > Yes. > >> Could I use a cable such as this:- > No. > >> Alternatively, is there a simpler way to achieve the goal? > No, you really need a level shifting stage that converts the PPS to RS232 levels. > > Tom > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. "Ceux qui sont prêts à abandonner une liberté essentielle pour obtenir une petite et provisoire sécurité, ne méritent ni liberté ni sécurité." Benjimin Franklin