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Author Topic: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)  (Read 457306 times)

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Offline cdev

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #950 on: December 05, 2017, 11:11:35 pm »
Maybe try a slower speed.. my GPSDO's default is 9600 baud.
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #951 on: December 06, 2017, 12:18:23 am »
Quote from: cdev on December 05, 2017, 11:11:35 pm
Maybe try a slower speed.. my GPSDO's default is 9600 baud.
I tried all the baud rates I could imagine.  This is very strange.  I know there is a binary output mode... *(irig?) maybe it has switched.
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Offline cdev

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #952 on: December 06, 2017, 12:24:37 am »
Do you have a logic analyzer you can throw on it? Also, take a look at that huge header, there are multiple UARTS on some of those huge headers. There is a web site in the Ukraine which has traces of the header on the UCCM GPSDOs. You may have spare UARTS, or like ublox, different kinds of output might be redirect-able to different outputs, i.e. reconfigurable. That is quite likely.

Look at what Ublox does to get an idea of how they do it.
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #953 on: December 06, 2017, 11:51:02 am »
Quote from: cdev on December 06, 2017, 12:24:37 am
Do you have a logic analyzer you can throw on it?
I have a scope which I should attach at some point.  The GPS is outputting sensible data and the on-board LEDs seem to be doing something.  I'm wondering if the CPU clock is derived from the OCXO... if so applying 12v will fix it.  This will have to wait... life is getting in the way.
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Offline cdev

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #954 on: December 06, 2017, 04:04:09 pm »
Could you paste in a sample of what the GPSDO is outputting along withe the parameters its being captured at? Maybe its something we can figure out?
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Offline Helix70

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #955 on: December 27, 2017, 07:26:45 am »
Hi Everyone,

Got myself a Trimble UCCM based GPSDO for Christmas (eBay auction: #252162780444). Had it running for a few hours, and it seems to be doing its thing correctly, does it all look normal to you guys? Any idea why the oscillator step changed in the plot window? Everything else seems stable at that time, not sure what happened.

Thanks,

Josh
« Last Edit: December 27, 2017, 07:28:28 am by Helix70 »
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Offline Bryan

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #956 on: December 27, 2017, 08:12:56 am »
The survey data progress shows 99% complete, so suspect it is part of the process. Did it complete?
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Offline Helix70

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #957 on: December 27, 2017, 08:47:40 am »
Yes, it completed. So perhaps thats when it locked the PLL for the oscillator? The parts per trillion dropped to -38ppt at that stage, from what looks like -6890ppt..
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Offline Bryan

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #958 on: December 27, 2017, 03:39:04 pm »
I suspect so, if you select I believe ! it can show you the status of the ocxo
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Offline Helix70

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #959 on: January 04, 2018, 12:55:12 am »
Why does the Oscillator signal "spike" and resettle once an hour? As can be seen on the screenshot, on every division there is a 20ppt or so spike on the OSC plot. Are other people seeing the same thing?
« Last Edit: January 04, 2018, 01:13:01 am by Helix70 »
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Offline texaspyro

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #960 on: January 04, 2018, 01:04:31 am »
Quote from: Helix70 on January 04, 2018, 12:55:12 am
Why does the Oscillator signal "spike" and resettle once an hour?

It could be the discipling algorithm periodically updating its loop parameters or measurements.  Heather's plotting functions tend to uncover lots of weird things GPSDO's do.
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Offline Macbeth

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #961 on: January 04, 2018, 09:21:43 pm »
Quote from: NivagSwerdna on December 05, 2017, 05:18:06 pm
I'm getting less optimistic... I powered the board from 6V but without the 12V boost converter in place and although I get flashing lights I am just getting garbage out of the serial pins... I thought this was 57600 8-N-1 but it seems to be not quite right... just gibberish.  I guess I will have to supply 12V and hope the behaviour changes.

Noooo! There is no need to force 12V on a board that expects 5V (ok maybe 5.5V - 6V). The Texas Instruments CSA boost module powers the OCXO and the GPS antenna. I replaced my fried one with a much cheaper Aliexpress XL6009 IIRC.

One thing I noticed was that any serial comms using a cheap shit CH340/USB was full of noise and I had to lower the comms to 19400 baud using the 'SCPI' commands of the Symmetricom. You probably have the same problem only worse. Try a real TTL/RS232 port if you still have one, otherwise try genuine FTDI or at least alternative USB/RS232 adapters. 
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Offline PA0KTF

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #962 on: February 13, 2018, 01:03:02 pm »
I have a Trimble board 57963-80A. I am missing L4. It looks similar to L11. Can somebody tell me the value of this component ? Thanks !
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Offline ghulands

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #963 on: May 10, 2018, 01:44:39 am »
After getting distracted for a couple of years, I finally got around to putting this together - though still on the bench.

I hooked up a raspberry pi to it so I could have a local ntp server running. I was having issues with gpsd so I modified it to allow it to process the $GPGSV message and then have it convert the $PFEC,GPtps to a $GPRMC message. The diff is attached.
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #964 on: May 16, 2018, 11:07:19 am »
Quote from: Macbeth on January 04, 2018, 09:21:43 pm
Noooo! There is no need to force 12V on a board that expects 5V (ok maybe 5.5V - 6V)...
One thing I noticed was that any serial comms using a cheap shit CH340/USB was full of noise and I had to lower the comms to 19400 baud using the 'SCPI' commands of the Symmetricom. You probably have the same problem only worse. Try a real TTL/RS232 port if you still have one, otherwise try genuine FTDI or at least alternative USB/RS232 adapters.
I had a brief look at this at the weekend.... I feed the Symettricom RS232 output to a cheapo RS232 to TTL level converter attached to an Arduino2560 and I noticed that the MAX3232 or whatever it is on the converter was REALLY REALLY hot so I disconnected it.... still getting garbage from the Symmetricom.  I will replace the MAX3232I on the board (it is an irritating form factor that I don't have) and see if that helps but I am losing hope.  There is definitely some life in the board though... the LEDs flash various colours so the FPGA core must be doing something useful.  The GPS receiver appears to have some life too as I can see the output from that.  I guess 12V to a MAX3232 was out of spec; most of the expensive components are on the other side of LDOs so fingers crossed for that side of the board... (they measure the correct voltages now).
« Last Edit: May 19, 2018, 09:10:49 am by NivagSwerdna »
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #965 on: May 19, 2018, 08:20:16 am »
Eventually got around to this again... I replaced both the MAX3232I (in a TSSOP package) and it still didn't work but eventually traced the problem to a tiny short on the edge connector pads (I don't have an edge connector as I hot aired that off originally whilst probing the board) due to a bit of stray solder from when I replaced the 12V boost regulator (I replaced the regulator with the correct part as they are available in Farnell).

All well again now.  I really need to box it properly and stop tinkering.

 
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #966 on: May 19, 2018, 08:25:13 am »
Quote from: ghulands on May 10, 2018, 01:44:39 am
I hooked up a raspberry pi to it so I could have a local ntp server running.
Did you get the PPS signal working with the server? I thought it would be too narrow so built a pulse stretcher. 
(Previously I did have a similar NTP server working using an old VP Oncore receiver for which I followed the instructions at http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html)

Thanks for the diff.  :-+
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Offline ghulands

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #967 on: May 19, 2018, 02:01:42 pm »
It was working for 24 hours but then it got confused and couldn't see the pulse. I had a gps unit from Adafruit lying around so I put a splitter on the antenna line and hooked it up along with the GPSDO. So now the ntp is essentially a separate system, all contained in the same box.
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Offline uskiTopic starter

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #968 on: May 28, 2018, 03:49:49 pm »
My GPSDO has been running continuously since I created this thread.

Once, a few weeks ago, I saw all the LEDs off, so I assumed it crashed. I repowered it, and then it's been working.

However, now, there is an issue : the ALM LED was lit RED, the ACT LED was blinking RED... I started writing about it, then I went back to take a picture and now it's all green ?

Strange. I'll see if it does it again. Maybe it's the GPS signals no longer getting to the unit properly.

Has anyone seen something like this ?

[EDIT] So I connected the serial port and printed the diagnostics logs. Apparently my unit keeps loosing the GPS, I guess my GPS signal is not good enough.

Code: [Select]
[5-28 15:49:40.0]UCCM-P > DIAG:LOG:READ:ALL?
[5-28 15:49:40.0]Log status: 500 entries
[5-28 15:49:40.0]
[5-28 15:49:40.0]L1:2018-05-23 13:50:27:Holdover started, No Ref
[5-28 15:49:40.0]L2:2018-05-23 14:35:48:GPS lock started
[5-28 15:49:40.0]L3:2018-05-23 14:35:57:Holdover started, No Ref
[5-28 15:49:40.0]L4:2018-05-23 14:37:25:GPS lock started
[5-28 15:49:40.0]L5:2018-05-23 14:38:30:Holdover started, No Ref
[5-28 15:49:40.0]L6:2018-05-23 14:39:04:GPS lock started
[5-28 15:49:40.0]L7:2018-05-23 14:39:06:Holdover started, No Ref
[5-28 15:49:40.0]L8:2018-05-23 14:40:37:GPS lock started
[5-28 15:49:40.0]L9:2018-05-23 14:40:38:Holdover started, No Ref
[5-28 15:49:40.0]L10:2018-05-23 14:41:12:GPS lock started
[5-28 15:49:40.0]L11:2018-05-23 14:41:26:Holdover started, No Ref
[5-28 15:49:40.0]L12:2018-05-23 14:42:31:GPS lock started
[5-28 15:49:40.0]L13:2018-05-23 14:42:35:Holdover started, No Ref
[5-28 15:49:40.0]L14:2018-05-23 15:11:17:GPS lock started
[5-28 15:49:40.0]L15:2018-05-23 15:11:19:Holdover started, No Ref
[5-28 15:49:40.0]L16:2018-05-23 15:22:05:GPS lock started
[5-28 15:49:40.0]L17:2018-05-23 16:04:33:Holdover started, No Ref
[5-28 15:49:40.0]L18:2018-05-23 16:05:35:GPS lock started
[5-28 15:49:40.0]L19:2018-05-23 16:05:55:Holdover started, No Ref
[5-28 15:49:40.0]L20:2018-05-23 16:06:29:GPS lock started
[5-28 15:49:40.0]L21:2018-05-23 16:34:17:Holdover started, No Ref
[5-28 15:49:40.7]L22:2018-05-23 16:34:54:GPS lock started
[5-28 15:49:40.7]L23:2018-05-23 16:52:56:Holdover started, No Ref
[5-28 15:49:40.7]L24:2018-05-23 16:54:55:GPS lock started
[5-28 15:49:40.7]L25:2018-05-23 16:55:03:Holdover started, No Ref
[5-28 15:49:40.7]L26:2018-05-23 16:55:37:GPS lock started
[5-28 15:49:40.7]L27:2018-05-23 16:55:46:Holdover started, No Ref
[5-28 15:49:40.7]L28:2018-05-23 16:56:31:GPS lock started
[5-28 15:49:40.7]L29:2018-05-23 17:12:55:Holdover started, No Ref
[5-28 15:49:40.7]L30:2018-05-23 17:13:42:GPS lock started
[5-28 15:49:40.7]L31:2018-05-23 17:15:51:Holdover started, No Ref
[5-28 15:49:40.7]L32:2018-05-23 17:16:25:GPS lock started
[5-28 15:49:40.7]L33:2018-05-23 17:16:42:Holdover started, No Ref
[5-28 15:49:40.7]L34:2018-05-23 17:17:28:GPS lock started
[5-28 15:49:40.7]L35:2018-05-23 17:19:49:Holdover started, No Ref
[5-28 15:49:40.7]L36:2018-05-23 17:21:21:GPS lock started
[5-28 15:49:40.7]L37:2018-05-23 17:23:32:Holdover started, No Ref
[5-28 15:49:40.7]L38:2018-05-23 17:24:06:GPS lock started
[5-28 15:49:40.7]L39:2018-05-23 17:24:07:Holdover started, No Ref
[5-28 15:49:40.7]L40:2018-05-23 17:29:00:GPS lock started
[5-28 15:49:40.7]L41:2018-05-23 17:32:37:Holdover started, No Ref
[5-28 15:49:40.7]L42:2018-05-23 17:33:16:GPS lock started
[5-28 15:49:40.7]L43:2018-05-23 17:33:19:Holdover started, No Ref
[5-28 15:49:40.7]L44:2018-05-23 17:34:53:GPS lock started
[5-28 15:49:40.7]L45:2018-05-23 17:36:32:Holdover started, No Ref
[5-28 15:49:40.7]L46:2018-05-23 17:37:43:GPS lock started
[5-28 15:49:40.7]L47:2018-05-23 17:41:31:Holdover started, No Ref
[5-28 15:49:40.7]L48:2018-05-23 17:42:11:GPS lock started
[5-28 15:49:40.7]L49:2018-05-23 17:43:08:Holdover started, No Ref
[5-28 15:49:40.7]L50:2018-05-23 17:44:09:GPS lock started
[5-28 15:49:40.7]L51:2018-05-23 17:44:42:Holdover started, No Ref
[5-28 15:49:40.7]L52:2018-05-23 17:45:21:GPS lock started
[5-28 15:49:40.7]L53:2018-05-23 17:45:26:Holdover started, No Ref
[5-28 15:49:40.7]L54:2018-05-23 17:56:16:GPS lock started
[5-28 15:49:40.7]L55:2018-05-23 17:56:20:Holdover started, No Ref
[5-28 15:49:40.7]L56:2018-05-23 18:11:15:GPS lock started
[5-28 15:49:40.7]L57:2018-05-23 18:12:13:Holdover started, No Ref
[5-28 15:49:40.7]L58:2018-05-23 18:12:50:GPS lock started
[5-28 15:49:40.7]L59:2018-05-23 18:13:05:Holdover started, No Ref
[5-28 15:49:40.7]L60:2018-05-23 18:19:50:GPS lock started
[5-28 15:49:40.7]L61:2018-05-23 18:19:56:Holdover started, No Ref
[5-28 15:49:40.7]L62:2018-05-23 18:20:30:GPS lock started
[5-28 15:49:40.7]L63:2018-05-23 18:20:56:Holdover started, No Ref
[5-28 15:49:40.7]L64:2018-05-23 18:27:10:GPS lock started
[5-28 15:49:40.7]L65:2018-05-23 18:27:26:Holdover started, No Ref
[5-28 15:49:40.7]L66:2018-05-23 18:29:08:GPS lock started
[5-28 15:49:40.7]L67:2018-05-23 18:29:26:Holdover started, No Ref
[5-28 15:49:40.7]L68:2018-05-23 18:30:40:GPS lock started
[5-28 15:49:40.7]L69:2018-05-23 18:30:41:Holdover started, No Ref
[5-28 15:49:40.7]L70:2018-05-23 18:31:35:GPS lock started
[5-28 15:49:40.7]L71:2018-05-23 18:32:33:Holdover started, No Ref
[5-28 15:49:40.7]L72:2018-05-23 18:33:07:GPS lock started
[5-28 15:49:40.7]L73:2018-05-23 18:34:48:GPS lock started
[5-28 15:49:40.7]L74:2018-05-23 18:34:56:Holdover started, No Ref
[5-28 15:49:40.7]L75:2018-05-23 18:36:54:GPS lock started
[5-28 15:49:40.7]L76:2018-05-23 18:37:05:Holdover started, No Ref
[5-28 15:49:40.7]L77:2018-05-23 18:37:39:GPS lock started
[5-28 15:49:40.7]L78:2018-05-23 18:40:19:Holdover started, No Ref
[5-28 15:49:40.7]L79:2018-05-23 18:41:27:GPS lock started
[5-28 15:49:40.7]L80:2018-05-23 18:41:38:Holdover started, No Ref
[5-28 15:49:40.7]L81:2018-05-23 18:42:24:GPS lock started
[5-28 15:49:40.7]L82:2018-05-23 18:42:28:Holdover started, No Ref
[5-28 15:49:40.7]L83:2018-05-23 18:44:56:GPS lock started
[5-28 15:49:40.7]L84:2018-05-23 18:45:32:Holdover started, No Ref
[5-28 15:49:40.7]L85:2018-05-23 18:46:06:GPS lock started
[5-28 15:49:40.7]L86:2018-05-23 18:46:55:Holdover started, No Ref
[5-28 15:49:40.7]L87:2018-05-23 18:47:29:GPS lock started
[5-28 15:49:40.7]L88:2018-05-23 18:50:45:Holdover started, No Ref
[5-28 15:49:40.7]L89:2018-05-23 18:51:19:GPS lock started
[5-28 15:49:40.7]L90:2018-05-23 18:52:07:Holdover started, No Ref
[5-28 15:49:40.7]L91:2018-05-23 18:53:03:GPS lock started
[5-28 15:49:40.7]L92:2018-05-23 18:53:07:Holdover started, No Ref
[5-28 15:49:40.7]L93:2018-05-23 18:53:41:GPS lock started
[5-28 15:49:40.7]L94:2018-05-23 18:59:09:Holdover started, No Ref
[5-28 15:49:40.7]L95:2018-05-23 18:59:43:GPS lock started
[5-28 15:49:40.7]L96:2018-05-23 18:59:49:Holdover started, No Ref
[5-28 15:49:40.7]L97:2018-05-23 19:00:58:GPS lock started
[5-28 15:49:40.7]L98:2018-05-23 19:02:25:Holdover started, No Ref
[5-28 15:49:40.7]L99:2018-05-23 19:02:59:GPS lock started
[5-28 15:49:40.7]L100:2018-05-23 19:03:19:Holdover started, No Ref
[5-28 15:49:40.7]L101:2018-05-23 19:03:53:GPS lock started
[5-28 15:49:40.7]L102:2018-05-23 19:05:42:Holdover started, No Ref
[5-28 15:49:40.7]L103:2018-05-23 19:16:13:GPS lock started
[5-28 15:49:40.7]L104:2018-05-23 19:16:42:Holdover started, No Ref
[5-28 15:49:40.7]L105:2018-05-23 22:08:35:GPS lock started
[5-28 15:49:40.7]L106:2018-05-23 22:08:39:Holdover started, No Ref
[5-28 15:49:40.7]L107:2018-05-23 22:09:35:GPS lock started
[5-28 15:49:41.0]L108:2018-05-23 22:09:40:Holdover started, No Ref
[5-28 15:49:41.0]L109:2018-05-23 22:10:39:GPS lock started
[5-28 15:49:41.0]L110:2018-05-23 22:11:03:Holdover started, No Ref
[5-28 15:49:41.0]L111:2018-05-23 22:16:33:GPS lock started
[5-28 15:49:41.0]L112:2018-05-23 22:16:48:Holdover started, No Ref
[5-28 15:49:41.0]L113:2018-05-23 22:18:10:GPS lock started
[5-28 15:49:41.0]L114:2018-05-23 22:18:12:Holdover started, No Ref
[5-28 15:49:41.0]L115:2018-05-23 22:20:29:GPS lock started
[5-28 15:49:41.0]L116:2018-05-23 22:20:36:Holdover started, No Ref
[5-28 15:49:41.0]L117:2018-05-23 23:02:08:GPS lock started
[5-28 15:49:41.0]L118:2018-05-23 23:02:14:Holdover started, No Ref
[5-28 15:49:41.0]L119:2018-05-23 23:17:41:GPS lock started
[5-28 15:49:41.0]L120:2018-05-23 23:17:48:Holdover started, No Ref
[5-28 15:49:41.0]L121:2018-05-23 23:22:43:GPS lock started
[5-28 15:49:41.0]L122:2018-05-23 23:23:12:Holdover started, No Ref
[5-28 15:49:41.0]L123:2018-05-23 23:42:40:GPS lock started
[5-28 15:49:41.0]L124:2018-05-23 23:46:18:GPS lock started
[5-28 15:49:41.0]L125:2018-05-23 23:50:09:GPS lock started
[5-28 15:49:41.0]L126:2018-05-23 23:51:37:Holdover started, No Ref
[5-28 15:49:41.0]L127:2018-05-24 00:06:37:GPS lock started
[5-28 15:49:41.0]L128:2018-05-24 00:06:43:Holdover started, No Ref
[5-28 15:49:41.0]L129:2018-05-24 00:10:06:GPS lock started
[5-28 15:49:41.0]L130:2018-05-24 00:10:25:Holdover started, No Ref
[5-28 15:49:41.0]L131:2018-05-24 00:24:58:GPS lock started
[5-28 15:49:41.0]L132:2018-05-24 00:25:00:Holdover started, No Ref
[5-28 15:49:41.0]L133:2018-05-24 00:26:00:GPS lock started
[5-28 15:49:41.0]L134:2018-05-24 00:26:02:Holdover started, No Ref
[5-28 15:49:41.0]L135:2018-05-24 00:27:29:GPS lock started
[5-28 15:49:41.0]L136:2018-05-24 00:27:32:Holdover started, No Ref
[5-28 15:49:41.0]L137:2018-05-24 00:29:30:GPS lock started
[5-28 15:49:41.0]L138:2018-05-24 00:29:46:Holdover started, No Ref
[5-28 15:49:41.0]L139:2018-05-24 01:11:42:GPS lock started
[5-28 15:49:41.0]L140:2018-05-24 01:12:06:Holdover started, No Ref
[5-28 15:49:41.0]L141:2018-05-24 01:12:40:GPS lock started
[5-28 15:49:41.8]L142:2018-05-24 01:12:56:Holdover started, No Ref
[5-28 15:49:41.8]L143:2018-05-24 01:13:30:GPS lock started
[5-28 15:49:41.8]L144:2018-05-24 01:14:23:Holdover started, No Ref
[5-28 15:49:41.8]L145:2018-05-24 01:15:15:GPS lock started
[5-28 15:49:41.8]L146:2018-05-24 01:15:32:Holdover started, No Ref
[5-28 15:49:41.8]L147:2018-05-24 01:16:06:GPS lock started
[5-28 15:49:41.8]L148:2018-05-24 01:16:56:Holdover started, No Ref
[5-28 15:49:41.8]L149:2018-05-24 01:21:06:GPS lock started
[5-28 15:49:41.8]L150:2018-05-24 01:21:12:Holdover started, No Ref
[5-28 15:49:41.8]L151:2018-05-24 01:22:23:GPS lock started
[5-28 15:49:41.8]L152:2018-05-24 01:23:06:Holdover started, No Ref
[5-28 15:49:41.8]L153:2018-05-24 01:23:40:GPS lock started
[5-28 15:49:41.8]L154:2018-05-24 01:24:11:Holdover started, No Ref
[5-28 15:49:41.8]L155:2018-05-24 01:25:15:GPS lock started
[5-28 15:49:41.8]L156:2018-05-24 01:25:25:Holdover started, No Ref
[5-28 15:49:41.8]L157:2018-05-24 01:30:03:GPS lock started
[5-28 15:49:41.8]L158:2018-05-24 01:33:17:Holdover started, No Ref
[5-28 15:49:41.8]L159:2018-05-24 01:33:51:GPS lock started
[5-28 15:49:41.8]L160:2018-05-24 01:34:44:Holdover started, No Ref
[5-28 15:49:41.8]L161:2018-05-24 01:35:18:GPS lock started
[5-28 15:49:41.8]L162:2018-05-24 01:35:29:Holdover started, No Ref
[5-28 15:49:41.8]L163:2018-05-24 01:36:29:GPS lock started
[5-28 15:49:41.8]L164:2018-05-24 01:36:54:Holdover started, No Ref
[5-28 15:49:41.8]L165:2018-05-24 01:37:39:GPS lock started
[5-28 15:49:41.8]L166:2018-05-24 01:39:58:Holdover started, No Ref
[5-28 15:49:41.8]L167:2018-05-24 01:58:49:GPS lock started
[5-28 15:49:41.8]L168:2018-05-24 02:11:12:GPS lock started
[5-28 15:49:41.8]L169:2018-05-24 02:12:12:Holdover started, No Ref
[5-28 15:49:41.8]L170:2018-05-24 02:12:48:GPS lock started
[5-28 15:49:41.8]L171:2018-05-24 02:12:50:Holdover started, No Ref
[5-28 15:49:41.8]L172:2018-05-24 02:15:42:GPS lock started
[5-28 15:49:41.8]L173:2018-05-24 02:19:17:Holdover started, No Ref
[5-28 15:49:41.8]L174:2018-05-24 02:19:51:GPS lock started
[5-28 15:49:41.8]L175:2018-05-24 02:20:20:Holdover started, No Ref
[5-28 15:49:41.8]L176:2018-05-24 02:21:22:GPS lock started
[5-28 15:49:41.8]L177:2018-05-24 02:21:24:Holdover started, No Ref
[5-28 15:49:41.8]L178:2018-05-24 02:22:40:GPS lock started
[5-28 15:49:41.8]L179:2018-05-24 02:22:47:Holdover started, No Ref
[5-28 15:49:41.8]L180:2018-05-24 02:23:27:GPS lock started
[5-28 15:49:41.8]L181:2018-05-24 02:23:35:Holdover started, No Ref
[5-28 15:49:41.8]L182:2018-05-24 02:24:14:GPS lock started
[5-28 15:49:41.8]L183:2018-05-24 02:24:59:Holdover started, No Ref
[5-28 15:49:41.8]L184:2018-05-24 02:26:00:GPS lock started
[5-28 15:49:41.8]L185:2018-05-24 02:27:28:Holdover started, No Ref
[5-28 15:49:41.8]L186:2018-05-24 02:28:07:GPS lock started
[5-28 15:49:41.8]L187:2018-05-24 02:28:26:Holdover started, No Ref
[5-28 15:49:41.8]L188:2018-05-24 02:49:08:GPS lock started
[5-28 15:49:41.8]L189:2018-05-24 02:49:25:Holdover started, No Ref
[5-28 15:49:41.8]L190:2018-05-24 02:51:03:GPS lock started
[5-28 15:49:41.8]L191:2018-05-24 02:51:41:Holdover started, No Ref
[5-28 15:49:41.8]L192:2018-05-24 02:57:00:GPS lock started
[5-28 15:49:41.8]L193:2018-05-24 02:57:04:Holdover started, No Ref
[5-28 15:49:41.8]L194:2018-05-24 02:58:04:GPS lock started
[5-28 15:49:41.8]L195:2018-05-24 02:58:30:Holdover started, No Ref
[5-28 15:49:41.8]L196:2018-05-24 03:02:12:GPS lock started
[5-28 15:49:41.8]L197:2018-05-24 03:02:37:Holdover started, No Ref
[5-28 15:49:41.8]L198:2018-05-24 03:05:42:GPS lock started
[5-28 15:49:41.8]L199:2018-05-24 03:05:46:Holdover started, No Ref
[5-28 15:49:41.8]L200:2018-05-24 03:06:52:GPS lock started
[5-28 15:49:41.8]L201:2018-05-24 03:06:54:Holdover started, No Ref
[5-28 15:49:41.8]L202:2018-05-24 03:08:19:GPS lock started
[5-28 15:49:41.8]L203:2018-05-24 03:08:26:Holdover started, No Ref
[5-28 15:49:41.8]L204:2018-05-24 03:09:40:GPS lock started
[5-28 15:49:41.8]L205:2018-05-24 03:09:46:Holdover started, No Ref
[5-28 15:49:41.8]L206:2018-05-24 03:10:30:GPS lock started
[5-28 15:49:41.8]L207:2018-05-24 03:10:52:Holdover started, No Ref
[5-28 15:49:41.8]L208:2018-05-24 03:11:46:GPS lock started
[5-28 15:49:41.8]L209:2018-05-24 03:12:07:Holdover started, No Ref
[5-28 15:49:41.8]L210:2018-05-24 03:18:48:GPS lock started
[5-28 15:49:41.8]L211:2018-05-24 03:19:05:Holdover started, No Ref
[5-28 15:49:41.8]L212:2018-05-24 03:20:01:GPS lock started
[5-28 15:49:41.8]L213:2018-05-24 03:20:30:Holdover started, No Ref
[5-28 15:49:41.8]L214:2018-05-24 03:21:09:GPS lock started
[5-28 15:49:41.8]L215:2018-05-24 03:21:13:Holdover started, No Ref
[5-28 15:49:41.8]L216:2018-05-24 03:21:52:GPS lock started
[5-28 15:49:41.8]L217:2018-05-24 03:22:03:Holdover started, No Ref
[5-28 15:49:41.8]L218:2018-05-24 03:23:31:GPS lock started
[5-28 15:49:41.8]L219:2018-05-24 03:26:00:Holdover started, No Ref
[5-28 15:49:41.8]L220:2018-05-24 03:30:41:GPS lock started
[5-28 15:49:41.8]L221:2018-05-24 03:35:14:Holdover started, No Ref
[5-28 15:49:41.8]L222:2018-05-24 03:42:18:GPS lock started
[5-28 15:49:41.8]L223:2018-05-24 03:43:19:Holdover started, No Ref
[5-28 15:49:41.8]L224:2018-05-24 03:43:53:GPS lock started
[5-28 15:49:41.8]L225:2018-05-24 03:44:34:Holdover started, No Ref
[5-28 15:49:41.8]L226:2018-05-24 03:45:13:GPS lock started
[5-28 15:49:42.0]L227:2018-05-24 03:47:11:Holdover started, No Ref
[5-28 15:49:42.0]L228:2018-05-24 03:47:45:GPS lock started
[5-28 15:49:42.0]L229:2018-05-24 03:50:22:Holdover started, No Ref
[5-28 15:49:42.0]L230:2018-05-24 03:54:31:GPS lock started
[5-28 15:49:42.0]L231:2018-05-24 03:54:52:Holdover started, No Ref
[5-28 15:49:42.0]L232:2018-05-24 03:55:26:GPS lock started
[5-28 15:49:42.0]L233:2018-05-24 03:56:19:Holdover started, No Ref
[5-28 15:49:42.0]L234:2018-05-24 03:57:55:GPS lock started
[5-28 15:49:42.0]L235:2018-05-24 03:59:28:Holdover started, No Ref
[5-28 15:49:42.0]L236:2018-05-24 04:00:02:GPS lock started
[5-28 15:49:42.0]L237:2018-05-24 04:00:06:Holdover started, No Ref
[5-28 15:49:42.0]L238:2018-05-24 04:07:24:GPS lock started
[5-28 15:49:42.0]L239:2018-05-24 04:08:41:Holdover started, No Ref
[5-28 15:49:42.0]L240:2018-05-24 04:09:15:GPS lock started
[5-28 15:49:42.0]L241:2018-05-24 04:10:44:Holdover started, No Ref
[5-28 15:49:42.0]L242:2018-05-24 04:14:54:GPS lock started
[5-28 15:49:42.0]L243:2018-05-24 04:15:15:Holdover started, No Ref
[5-28 15:49:42.0]L244:2018-05-24 04:19:20:GPS lock started
[5-28 15:49:42.0]L245:2018-05-24 04:20:06:Holdover started, No Ref
[5-28 15:49:42.0]L246:2018-05-24 04:21:43:GPS lock started
[5-28 15:49:42.0]L247:2018-05-24 04:22:42:Holdover started, No Ref
[5-28 15:49:42.0]L248:2018-05-24 04:24:03:GPS lock started
[5-28 15:49:42.0]L249:2018-05-24 04:24:50:Holdover started, No Ref
[5-28 15:49:42.0]L250:2018-05-24 04:25:24:GPS lock started
[5-28 15:49:42.0]L251:2018-05-24 04:26:02:Holdover started, No Ref
[5-28 15:49:42.0]L252:2018-05-24 04:26:49:GPS lock started
[5-28 15:49:42.0]L253:2018-05-24 04:27:01:Holdover started, No Ref
[5-28 15:49:42.0]L254:2018-05-24 04:30:46:GPS lock started
[5-28 15:49:42.0]L255:2018-05-24 04:30:47:Holdover started, No Ref
[5-28 15:49:42.0]L256:2018-05-24 04:46:47:GPS lock started
[5-28 15:49:42.0]L257:2018-05-24 04:47:22:Holdover started, No Ref
[5-28 15:49:42.0]L258:2018-05-24 04:47:56:GPS lock started
[5-28 15:49:42.0]L259:2018-05-24 04:49:02:Holdover started, No Ref
[5-28 15:49:42.0]L260:2018-05-24 04:49:36:GPS lock started
[5-28 15:49:42.8]L261:2018-05-24 04:50:59:Holdover started, No Ref
[5-28 15:49:42.8]L262:2018-05-24 04:51:44:GPS lock started
[5-28 15:49:42.8]L263:2018-05-24 04:52:13:Holdover started, No Ref
[5-28 15:49:42.8]L264:2018-05-24 04:52:47:GPS lock started
[5-28 15:49:42.8]L265:2018-05-24 04:53:40:Holdover started, No Ref
[5-28 15:49:42.8]L266:2018-05-24 04:56:41:GPS lock started
[5-28 15:49:42.8]L267:2018-05-24 04:58:06:Holdover started, No Ref
[5-28 15:49:42.8]L268:2018-05-24 05:00:19:GPS lock started
[5-28 15:49:42.8]L269:2018-05-24 05:00:26:Holdover started, No Ref
[5-28 15:49:42.8]L270:2018-05-24 05:01:00:GPS lock started
[5-28 15:49:42.8]L271:2018-05-24 05:03:34:Holdover started, No Ref
[5-28 15:49:42.8]L272:2018-05-24 05:09:34:GPS lock started
[5-28 15:49:42.8]L273:2018-05-24 05:10:00:Holdover started, No Ref
[5-28 15:49:42.8]L274:2018-05-24 05:12:22:GPS lock started
[5-28 15:49:42.8]L275:2018-05-24 05:31:12:GPS lock started
[5-28 15:49:42.8]L276:2018-05-24 05:31:30:Holdover started, No Ref
[5-28 15:49:42.8]L277:2018-05-24 05:50:38:GPS lock started
[5-28 15:49:42.8]L278:2018-05-24 05:50:41:Holdover started, No Ref
[5-28 15:49:42.8]L279:2018-05-24 05:51:28:GPS lock started
[5-28 15:49:42.8]L280:2018-05-24 05:51:37:Holdover started, No Ref
[5-28 15:49:42.8]L281:2018-05-24 05:52:11:GPS lock started
[5-28 15:49:42.8]L282:2018-05-24 05:52:24:Holdover started, No Ref
[5-28 15:49:42.8]L283:2018-05-24 05:52:58:GPS lock started
[5-28 15:49:42.8]L284:2018-05-24 05:53:15:Holdover started, No Ref
[5-28 15:49:42.8]L285:2018-05-24 05:53:49:GPS lock started
[5-28 15:49:42.8]L286:2018-05-24 05:54:33:Holdover started, No Ref
[5-28 15:49:42.8]L287:2018-05-24 06:36:53:GPS lock started
[5-28 15:49:42.8]L288:2018-05-24 06:37:32:Holdover started, No Ref
[5-28 15:49:42.8]L289:2018-05-24 06:44:19:GPS lock started
[5-28 15:49:42.8]L290:2018-05-24 06:49:55:Holdover started, No Ref
[5-28 15:49:42.8]L291:2018-05-24 06:50:44:GPS lock started
[5-28 15:49:42.8]L292:2018-05-24 06:50:53:Holdover started, No Ref
[5-28 15:49:42.8]L293:2018-05-24 06:58:21:GPS lock started
[5-28 15:49:42.8]L294:2018-05-24 06:58:40:Holdover started, No Ref
[5-28 15:49:42.8]L295:2018-05-24 07:00:14:GPS lock started
[5-28 15:49:42.8]L296:2018-05-24 07:00:34:Holdover started, No Ref
[5-28 15:49:42.8]L297:2018-05-24 07:01:33:GPS lock started
[5-28 15:49:42.8]L298:2018-05-24 07:01:52:Holdover started, No Ref
[5-28 15:49:42.8]L299:2018-05-24 07:05:19:GPS lock started
[5-28 15:49:42.8]L300:2018-05-24 07:05:46:Holdover started, No Ref
[5-28 15:49:42.8]L301:2018-05-24 07:06:43:GPS lock started
[5-28 15:49:42.8]L302:2018-05-24 07:07:15:Holdover started, No Ref
[5-28 15:49:42.8]L303:2018-05-24 07:22:47:GPS lock started
[5-28 15:49:42.8]L304:2018-05-24 07:22:52:Holdover started, No Ref
[5-28 15:49:42.8]L305:2018-05-24 07:26:00:GPS lock started
[5-28 15:49:42.8]L306:2018-05-24 07:26:20:Holdover started, No Ref
[5-28 15:49:42.8]L307:2018-05-24 07:34:16:GPS lock started
[5-28 15:49:42.8]L308:2018-05-24 07:34:23:Holdover started, No Ref
[5-28 15:49:42.8]L309:2018-05-24 07:34:57:GPS lock started
[5-28 15:49:42.8]L310:2018-05-24 07:35:35:Holdover started, No Ref
[5-28 15:49:42.8]L311:2018-05-24 07:36:09:GPS lock started
[5-28 15:49:42.8]L312:2018-05-24 07:36:21:Holdover started, No Ref
[5-28 15:49:42.8]L313:2018-05-24 07:46:17:GPS lock started
[5-28 15:49:42.8]L314:2018-05-24 07:46:28:Holdover started, No Ref
[5-28 15:49:42.8]L315:2018-05-24 08:07:47:GPS lock started
[5-28 15:49:42.8]L316:2018-05-24 08:07:58:Holdover started, No Ref
[5-28 15:49:42.8]L317:2018-05-24 08:09:40:GPS lock started
[5-28 15:49:42.8]L318:2018-05-24 08:10:04:Holdover started, No Ref
[5-28 15:49:42.8]L319:2018-05-24 08:11:09:GPS lock started
[5-28 15:49:42.8]L320:2018-05-24 08:13:20:Holdover started, No Ref
[5-28 15:49:42.8]L321:2018-05-24 08:14:42:GPS lock started
[5-28 15:49:42.8]L322:2018-05-24 08:15:05:Holdover started, No Ref
[5-28 15:49:42.8]L323:2018-05-24 08:16:29:GPS lock started
[5-28 15:49:42.8]L324:2018-05-24 08:17:09:Holdover started, No Ref
[5-28 15:49:42.8]L325:2018-05-24 08:17:43:GPS lock started
[5-28 15:49:42.8]L326:2018-05-24 08:18:24:Holdover started, No Ref
[5-28 15:49:42.8]L327:2018-05-24 08:19:16:GPS lock started
[5-28 15:49:42.8]L328:2018-05-24 08:21:14:Holdover started, No Ref
[5-28 15:49:42.8]L329:2018-05-24 08:22:20:GPS lock started
[5-28 15:49:42.8]L330:2018-05-24 08:23:14:Holdover started, No Ref
[5-28 15:49:42.8]L331:2018-05-24 08:51:11:GPS lock started
[5-28 15:49:42.8]L332:2018-05-24 08:52:52:Holdover started, No Ref
[5-28 15:49:42.8]L333:2018-05-24 08:54:58:GPS lock started
[5-28 15:49:42.8]L334:2018-05-24 09:06:04:Holdover started, No Ref
[5-28 15:49:42.8]L335:2018-05-24 09:06:38:GPS lock started
[5-28 15:49:42.8]L336:2018-05-24 09:06:45:Holdover started, No Ref
[5-28 15:49:42.8]L337:2018-05-24 09:07:30:GPS lock started
[5-28 15:49:42.8]L338:2018-05-24 09:10:24:GPS lock started
[5-28 15:49:42.8]L339:2018-05-24 09:10:31:Holdover started, No Ref
[5-28 15:49:42.8]L340:2018-05-24 09:19:37:GPS lock started
[5-28 15:49:42.8]L341:2018-05-24 09:19:39:Holdover started, No Ref
[5-28 15:49:42.8]L342:2018-05-24 09:20:13:GPS lock started
[5-28 15:49:42.8]L343:2018-05-24 09:20:34:Holdover started, No Ref
[5-28 15:49:42.8]L344:2018-05-24 09:21:24:GPS lock started
[5-28 15:49:43.0]L345:2018-05-24 09:21:26:Holdover started, No Ref
[5-28 15:49:43.0]L346:2018-05-24 09:23:21:GPS lock started
[5-28 15:49:43.0]L347:2018-05-24 09:23:36:Holdover started, No Ref
[5-28 15:49:43.0]L348:2018-05-24 09:27:18:GPS lock started
[5-28 15:49:43.0]L349:2018-05-24 09:27:58:Holdover started, No Ref
[5-28 15:49:43.0]L350:2018-05-24 09:28:47:GPS lock started
[5-28 15:49:43.0]L351:2018-05-24 09:30:22:Holdover started, No Ref
[5-28 15:49:43.0]L352:2018-05-24 09:30:56:GPS lock started
[5-28 15:49:43.0]L353:2018-05-24 09:31:16:Holdover started, No Ref
[5-28 15:49:43.0]L354:2018-05-24 09:31:50:GPS lock started
[5-28 15:49:43.0]L355:2018-05-24 09:32:20:Holdover started, No Ref
[5-28 15:49:43.0]L356:2018-05-24 09:33:10:GPS lock started
[5-28 15:49:43.0]L357:2018-05-24 09:33:32:Holdover started, No Ref
[5-28 15:49:43.0]L358:2018-05-24 09:34:40:GPS lock started
[5-28 15:49:43.0]L359:2018-05-24 09:34:45:Holdover started, No Ref
[5-28 15:49:43.0]L360:2018-05-24 09:48:51:GPS lock started
[5-28 15:49:43.0]L361:2018-05-24 10:07:56:GPS lock started
[5-28 15:49:43.0]L362:2018-05-24 10:07:57:Holdover started, No Ref
[5-28 15:49:43.0]L363:2018-05-24 10:29:00:GPS lock started
[5-28 15:49:43.0]L364:2018-05-24 10:29:01:Holdover started, No Ref
[5-28 15:49:43.0]L365:2018-05-24 10:48:37:GPS lock started
[5-28 15:49:43.0]L366:2018-05-24 10:49:35:Holdover started, No Ref
[5-28 15:49:43.0]L367:2018-05-24 12:47:30:GPS lock started
[5-28 15:49:43.0]L368:2018-05-24 12:47:57:Holdover started, No Ref
[5-28 15:49:43.0]L369:2018-05-24 12:50:59:GPS lock started
[5-28 15:49:43.0]L370:2018-05-24 12:53:05:GPS lock started
[5-28 15:49:43.0]L371:2018-05-24 12:53:06:Holdover started, No Ref
[5-28 15:49:43.0]L372:2018-05-24 12:53:40:GPS lock started
[5-28 15:49:43.0]L373:2018-05-24 12:54:29:Holdover started, No Ref
[5-28 15:49:43.0]L374:2018-05-24 12:55:54:GPS lock started
[5-28 15:49:43.0]L375:2018-05-24 12:55:56:Holdover started, No Ref
[5-28 15:49:43.0]L376:2018-05-24 12:56:53:GPS lock started
[5-28 15:49:43.0]L377:2018-05-24 12:57:01:Holdover started, No Ref
[5-28 15:49:43.7]L378:2018-05-24 13:02:56:GPS lock started
[5-28 15:49:43.7]L379:2018-05-24 13:03:15:Holdover started, No Ref
[5-28 15:49:43.7]L380:2018-05-24 13:03:54:GPS lock started
[5-28 15:49:43.7]L381:2018-05-24 13:04:06:Holdover started, No Ref
[5-28 15:49:43.7]L382:2018-05-24 13:05:12:GPS lock started
[5-28 15:49:43.7]L383:2018-05-24 13:06:54:Holdover started, No Ref
[5-28 15:49:43.7]L384:2018-05-24 13:08:26:GPS lock started
[5-28 15:49:43.7]L385:2018-05-24 13:08:58:Holdover started, No Ref
[5-28 15:49:43.7]L386:2018-05-24 13:10:04:GPS lock started
[5-28 15:49:43.7]L387:2018-05-24 13:10:06:Holdover started, No Ref
[5-28 15:49:43.7]L388:2018-05-24 13:15:27:GPS lock started
[5-28 15:49:43.7]L389:2018-05-24 13:15:39:Holdover started, No Ref
[5-28 15:49:43.7]L390:2018-05-24 13:19:58:GPS lock started
[5-28 15:49:43.7]L391:2018-05-24 13:21:06:Holdover started, No Ref
[5-28 15:49:43.7]L392:2018-05-24 15:22:27:GPS lock started
[5-28 15:49:43.7]L393:2018-05-24 15:22:35:Holdover started, No Ref
[5-28 15:49:43.7]L394:2018-05-24 15:38:58:GPS lock started
[5-28 15:49:43.7]L395:2018-05-24 15:39:22:Holdover started, No Ref
[5-28 15:49:43.7]L396:2018-05-24 15:44:42:GPS lock started
[5-28 15:49:43.7]L397:2018-05-24 15:44:48:Holdover started, No Ref
[5-28 15:49:43.7]L398:2018-05-24 15:45:36:GPS lock started
[5-28 15:49:43.7]L399:2018-05-24 15:45:49:Holdover started, No Ref
[5-28 15:49:43.7]L400:2018-05-24 17:19:25:GPS lock started
[5-28 15:49:43.7]L401:2018-05-24 17:20:20:Holdover started, No Ref
[5-28 15:49:43.7]L402:2018-05-24 17:21:30:GPS lock started
[5-28 15:49:43.7]L403:2018-05-24 17:26:07:Holdover started, No Ref
[5-28 15:49:43.7]L404:2018-05-24 17:26:41:GPS lock started
[5-28 15:49:43.7]L405:2018-05-24 17:26:45:Holdover started, No Ref
[5-28 15:49:43.7]L406:2018-05-24 17:29:52:GPS lock started
[5-28 15:49:43.7]L407:2018-05-24 17:30:00:Holdover started, No Ref
[5-28 15:49:43.7]L408:2018-05-24 18:53:06:GPS lock started
[5-28 15:49:43.7]L409:2018-05-24 18:53:11:Holdover started, No Ref
[5-28 15:49:43.7]L410:2018-05-24 19:27:54:GPS lock started
[5-28 15:49:43.7]L411:2018-05-24 19:28:00:Holdover started, No Ref
[5-28 15:49:43.7]L412:2018-05-25 22:18:45:GPS lock started
[5-28 15:49:43.7]L413:2018-05-25 22:20:06:Holdover started, No Ref
[5-28 15:49:43.7]L414:2018-05-26 02:08:37:GPS lock started
[5-28 15:49:43.7]L415:2018-05-26 02:09:11:Holdover started, No Ref
[5-28 15:49:43.7]L416:2018-05-26 02:09:45:GPS lock started
[5-28 15:49:43.7]L417:2018-05-26 02:09:50:Holdover started, No Ref
[5-28 15:49:43.7]L418:2018-05-26 02:10:24:GPS lock started
[5-28 15:49:43.7]L419:2018-05-26 02:11:59:GPS lock started
[5-28 15:49:43.7]L420:2018-05-26 02:12:25:Holdover started, No Ref
[5-28 15:49:43.7]L421:2018-05-26 04:06:02:GPS lock started
[5-28 15:49:43.7]L422:2018-05-26 04:06:19:Holdover started, No Ref
[5-28 15:49:43.7]L423:2018-05-26 07:28:11:GPS lock started
[5-28 15:49:43.7]L424:2018-05-26 07:28:21:Holdover started, No Ref
[5-28 15:49:43.7]L425:2018-05-26 07:29:37:GPS lock started
[5-28 15:49:43.7]L426:2018-05-26 07:29:49:Holdover started, No Ref
[5-28 15:49:43.7]L427:2018-05-26 08:01:37:GPS lock started
[5-28 15:49:43.7]L428:2018-05-26 08:01:39:Holdover started, No Ref
[5-28 15:49:43.7]L429:2018-05-28 15:45:15:GPS lock started
[5-28 15:49:43.7]L430:2018-05-28 15:45:52:Holdover started, No Ref
[5-28 15:49:43.7]L431:2018-05-28 15:46:26:GPS lock started
[5-28 15:49:43.7]L432:2018-05-28 15:46:27:Holdover started, No Ref
[5-28 15:49:43.7]L433:2018-05-28 15:48:51:GPS lock started
[5-28 15:49:43.7]L434:2018-05-28 15:48:58:Holdover started, No Ref
[5-28 15:49:43.7]L435:2018-05-28 15:57:49:GPS lock started
[5-28 15:49:43.7]L436:2018-05-28 15:58:34:Holdover started, No Ref
[5-28 15:49:43.7]L437:2018-05-28 16:01:00:GPS lock started
[5-28 15:49:43.7]L438:2018-05-28 16:03:32:Holdover started, No Ref
[5-28 15:49:43.7]L439:2018-05-28 16:04:38:GPS lock started
[5-28 15:49:43.7]L440:2018-05-28 16:09:36:Holdover started, No Ref
[5-28 15:49:43.7]L441:2018-05-28 16:10:56:GPS lock started
[5-28 15:49:43.7]L442:2018-05-28 16:11:14:Holdover started, No Ref
[5-28 15:49:43.7]L443:2018-05-28 16:12:41:GPS lock started
[5-28 15:49:43.7]L444:2018-05-28 16:13:55:Holdover started, No Ref
[5-28 15:49:43.7]L445:2018-05-28 16:14:29:GPS lock started
[5-28 15:49:43.7]L446:2018-05-28 16:15:28:Holdover started, No Ref
[5-28 15:49:43.7]L447:2018-05-28 16:16:02:GPS lock started
[5-28 15:49:43.7]L448:2018-05-28 16:16:20:Holdover started, No Ref
[5-28 15:49:43.7]L449:2018-05-28 16:17:00:GPS lock started
[5-28 15:49:43.7]L450:2018-05-28 16:17:27:Holdover started, No Ref
[5-28 15:49:43.7]L451:2018-05-28 16:18:41:GPS lock started
[5-28 15:49:43.7]L452:2018-05-28 16:19:36:Holdover started, No Ref
[5-28 15:49:43.7]L453:2018-05-28 16:20:50:GPS lock started
[5-28 15:49:43.7]L454:2018-05-28 16:22:02:Holdover started, No Ref
[5-28 15:49:43.7]L455:2018-05-28 16:31:54:GPS lock started
[5-28 15:49:43.7]L456:2018-05-28 16:32:30:Holdover started, No Ref
[5-28 15:49:43.7]L457:2018-05-28 16:33:42:GPS lock started
[5-28 15:49:43.7]L458:2018-05-28 16:34:16:Holdover started, No Ref
[5-28 15:49:43.7]L459:2018-05-28 16:34:50:GPS lock started
[5-28 15:49:43.7]L460:2018-05-28 16:39:42:Holdover started, No Ref
[5-28 15:49:43.7]L461:2018-05-28 16:40:16:GPS lock started
[5-28 15:49:44.0]L462:2018-05-28 16:40:55:Holdover started, No Ref
[5-28 15:49:44.0]L463:2018-05-28 16:41:34:GPS lock started
[5-28 15:49:44.0]L464:2018-05-28 16:41:54:Holdover started, No Ref
[5-28 15:49:44.0]L465:2018-05-28 16:42:42:GPS lock started
[5-28 15:49:44.0]L466:2018-05-28 16:57:59:Holdover started, No Ref
[5-28 15:49:44.0]L467:2018-05-28 17:22:15:GPS lock started
[5-28 15:49:44.0]L468:2018-05-28 17:22:17:Holdover started, No Ref
[5-28 15:49:44.0]L469:2018-05-28 17:59:07:GPS lock started
[5-28 15:49:44.0]L470:2018-05-28 17:59:22:Holdover started, No Ref
[5-28 15:49:44.0]L471:2018-05-28 18:00:37:GPS lock started
[5-28 15:49:44.0]L472:2018-05-28 18:01:31:GPS lock started
[5-28 15:49:44.0]L473:2018-05-28 18:01:41:Holdover started, No Ref
[5-28 15:49:44.0]L474:2018-05-28 18:04:01:GPS lock started
[5-28 15:49:44.0]L475:2018-05-28 18:04:08:Holdover started, No Ref
[5-28 15:49:44.0]L476:2018-05-28 18:11:09:GPS lock started
[5-28 15:49:44.0]L477:2018-05-28 18:11:16:Holdover started, No Ref
[5-28 15:49:44.0]L478:2018-05-28 18:11:50:GPS lock started
[5-28 15:49:44.0]L479:2018-05-28 18:14:26:Holdover started, No Ref
[5-28 15:49:44.0]L480:2018-05-28 18:15:00:GPS lock started
[5-28 15:49:44.0]L481:2018-05-28 18:15:38:Holdover started, No Ref
[5-28 15:49:44.0]L482:2018-05-28 18:16:42:GPS lock started
[5-28 15:49:44.0]L483:2018-05-28 18:20:19:Holdover started, No Ref
[5-28 15:49:44.0]L484:2018-05-28 18:21:00:GPS lock started
[5-28 15:49:44.0]L485:2018-05-28 18:45:35:Holdover started, No Ref
[5-28 15:49:44.0]L486:2018-05-28 19:06:43:GPS lock started
[5-28 15:49:44.0]L487:2018-05-28 19:12:28:Holdover started, No Ref
[5-28 15:49:44.0]L488:2018-05-28 19:22:21:GPS lock started
[5-28 15:49:44.0]L489:2018-05-28 19:22:38:Holdover started, No Ref
[5-28 15:49:44.0]L490:2018-05-28 19:29:18:GPS lock started
[5-28 15:49:44.0]L491:2018-05-28 19:29:45:Holdover started, No Ref
[5-28 15:49:44.0]L492:2018-05-28 19:30:43:GPS lock started
[5-28 15:49:44.0]L493:2018-05-28 19:30:47:Holdover started, No Ref
[5-28 15:49:44.0]L494:2018-05-28 19:32:12:GPS lock started
[5-28 15:49:44.0]L495:2018-05-28 19:40:43:Holdover started, No Ref
[5-28 15:49:44.0]L496:2018-05-28 19:41:41:GPS lock started
[5-28 15:49:44.1]L497:2018-05-28 19:41:51:Holdover started, No Ref
[5-28 15:49:44.1]L498:2018-05-28 19:42:30:GPS lock started
[5-28 15:49:44.1]L499:2018-05-28 19:42:43:Holdover started, No Ref
[5-28 15:49:44.1]L500:2018-05-28 19:43:32:GPS lock started
[5-28 15:49:44.1]Command Complete
« Last Edit: May 28, 2018, 08:37:27 pm by uski »
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Offline uskiTopic starter

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #969 on: May 28, 2018, 08:56:38 pm »
If anyone is looking for the pinout of the ribbon cable connector, I just found this :
http://tipok.org.ua/node/53

Didn't see it mentionned

Attached a copy here in case the link goes dead
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Offline texaspyro

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #970 on: October 08, 2018, 03:57:41 am »
There are now some Samsung versions of this GPSDO showing up on Ebay... here's one:

https://www.ebay.com/itm/Samsung-STP2945LF-10MHz-GPS-Disciplined-Clock-GPSDO-Module-Fast-Locking-Star/332792680396?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

That seller included a breakout board / flat cable to convert the flat flex connector on the GPSDO to a standard 0.1" 2x25 header.    UART2 is RS-232 level serial that goes to your computer.  On these units you need to connect pin 39 to ground to enable GPS as the reference.  Pinouts are shown here:

http://tipok.org.ua/node/53

I have seen two versions... the -L8 and the -LPK.  Mine is the -L8

They use a Ublox LEA-6T GPS.    They seem to work well.   I had to make some changes to Lady Heather to work with them (mainly due to the oddly inconsistent use of end-of-line characters).

One thing about them is their rather picky power requirement... it needs to around 5.5V.  They throw a power alarm if too far off of that (but mine does work from 5 .. 6V).   I used a 6V power supply dropped down with a Schottky diode.

They do a self-survey (around 40 minutes) every time you power up or after an extended holdover event.   If no antenna is connected they report the antenna current as 200 mA... WTF?


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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #971 on: October 08, 2018, 09:31:51 am »
Looks nice.  I don't see a TI DC-DC converter module like on the Symmetricom.. What are the voltage and power requirements on start-up?

I see the ebay listing shows some damage... L121 and C219... so I guess it is pot luck as usual.
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Offline texaspyro

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #972 on: October 08, 2018, 06:06:55 pm »
Around 5.5V at 1A power up dropping to 0.6A
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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #973 on: October 08, 2018, 06:45:59 pm »
Quote from: NivagSwerdna on October 08, 2018, 09:31:51 am
I don't see a TI DC-DC converter module like on the Symmetricom.

If I remember correctly the DC-DC in the Symmetricom is only used for the OCXO, and clearly Samsung is using their own branded one which must be running on 5V.
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Offline NivagSwerdna

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Re: A look at my Symmetricom GPSDO / 10MHz reference (OCXO + Furuno receiver)
« Reply #974 on: October 11, 2018, 10:18:55 pm »
https://www.ebay.com/itm/312248369350

Looks like a couple more in circulation... not a bad price either
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