Re: [time-nuts] Arduino GPSDO with 1ns res TIC

On Tue, Feb 11, 2014 at 10:10 PM, Don Latham wrote: > >... Could you please resend to me off-list? It is all archived in several places. You don't need to save any of this yourself http://www.febo.com/pipermail/time-nuts/2014-February/082820.html -- Chris Albertson Redondo Beach, California

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

> Lars: I idiotically erased your original email with the schematics and so > on. Could you please resend to me off-list? Thank you very much Look at the headers of any time-nuts message (and many others from well run mail lists) and you will see something like this: List-archive:

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

Lars: I idiotically erased your original email with the schematics and so on. Could you please resend to me off-list? Thank you very much Don -- "The power of accurate observation is commonly called cynicism by those who have not got it." -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile S

Re: [time-nuts] BC637PCI 1024 week rollover

You are right ! Now I am going to modify the code a lit bit. Each time as we call bcReadBinTimeEx or bcReadBinTime, we need to add "magic number" to unsigned long pointer which store major time. Example: if (bcReadBinTime(stfp_handle, &btm[1], &btm[0], &stat ) == 0) {

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

Lars, Thanks for posting this. I think your design will be popular especially with availability of the nano size Arduinos that sell for $4 from China. Your design could be built on a 3" perf board for about $10 with change left over. (not counting the OCXO and GPS) I like the little shields you

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

Lars Will you be sharing your source code? Regards Paul WB8TSL On Tue, Feb 11, 2014 at 1:23 PM, Lars Walenius wrote: > I have long thought I should make my first post to the Time-Nuts forum. > Being very grateful to everything I learned here. > > > > > > I have tried to attach a picture showing

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

Hi Lars, Thanks so much for joining time-nuts and posting that excellent report. I know a number of people have been talking about Arduino-based GPSDO recently and this is exactly the type of project that is of interest to us. Understand that worse or better GPSDO implementations exist but a ke

Re: [time-nuts] Arduino GPSDO with 1ns res TIC

Lars Welcome to time-nuts and that's one way to make a splash from the start by creating something and then sharing it. Thank you and again welcome. Paul WB8TSL On Tue, Feb 11, 2014 at 1:23 PM, Lars Walenius wrote: > I have long thought I should make my first post to the Time-Nuts forum. > Being

Re: [time-nuts] BC637PCI 1024 week rollover

Ah, now I understand:-) All I'm using at the moment though is a small Trimble patch mounted indoors and although it does drop out occasionally most of the time it's ok, have you checked your satellite signal levels as reported by the BC637 software? Although my own interest is really only i

Re: [time-nuts] BC637PCI 1024 week rollover

Sorry for confusing information. I have some small Trimble antenna which currently connected to BC637PCI. However I never get it "locked" with that antenna: GPS PACKET 46 - GPS HEALTH PACKET Status: No usable satellites Error: 63 Binary Time: 02/11/2014 17:28:40.0572284 Status: 7 Binary T

Re: [time-nuts] BC637PCI 1024 week rollover

Ah, sorry, when you commented before about modifying the demo software it obviously didn't register with me quite what you were trying to do. In the BC637PCI Demo software, I'm using version 7.0.0, under the "Help" menu, one item is Receiver Firmware Version and this returns the Packet 45 dat

Re: [time-nuts] BC637PCI 1024 week rollover

I figured out why GPS FW information was not available by request. To do such requests BC637PCI needs to be in "GPS MODE". If I run the request in "Free Run", it return the error code. Here is FW infomation from my GPS module: GPS Packet Menu 1. Request Packet 41 - Gps Time Packet 2. Requ