Re: [time-nuts] How get FEI-Zyfer 380 GPSDO to talk with computer?

GPS Monitor can be downloaded from my one drive account. Two files, not sure which is which though as they are both GPS monitor. https://1drv.ms/f/s!AmMj2HdT5zCUhLckfpNYGebG0Js-bw -=Bryan=- From: time-nuts on behalf of James

Re: [time-nuts] How get FEI-Zyfer 380 GPSDO to talk with computer?

Hi I have a nasty suspicion that the “GPSMon" Zyfer is talking about is not the same program that is part of the Linux package. It’s a fairly obvious name. I’d bet it got re-used a couple of times. The docs on gpsd refer to it’s own tangled history in this regard. It’s certainly worth trying.

[time-nuts] Zyfer Nanosync 380

I got in my Zyfer Nanosync 380 GPSDO off of Ebay and have it working with Lady Heather. The documentation the Ed found is fairly decent. The 700+ lines of code I added to Heather worked the first time (damn, I'm good ;-) ) It is a small (< 4x4x1") GPSDO that runs off of 12V (< 1A). It was

[time-nuts] TruePosition GPS Receiver

I also sent email to all the people in the Packrat slides. One email bounced and I have not heard back from the other 2. So far, I have had no luck finding any info on these devices. -- > I've got an e-mail into the authors of the Packrat GPS Receiver Project > slides asking

Re: [time-nuts] How get FEI-Zyfer 380 GPSDO to talk with computer?

gpsmon is part of the gpsd package. http://www.catb.org/gpsd/ But you can try simply connecting the serial data to a terminal window and reading what comes out. On Wed, May 3, 2017 at 4:40 PM, James Robbins wrote: > Has anyone gotten an FEI-Zyfer 380 to talk to a

[time-nuts] How get FEI-Zyfer 380 GPSDO to talk with computer?

Has anyone gotten an FEI-Zyfer 380 to talk to a control program? Can't seem to get it to talk to GPSCon or TAC32. Supposedly, it wants a program called "GPSMon" but I do not find the program with Google. Jim Robbins N1JR ___ time-nuts mailing

Re: [time-nuts] TruePosition GPS Receiver

On 5/1/2017 4:35 PM, Gregory Beat wrote: Interesting surplus GPS receiver / 10 MHz item on eBay Lots of parts :-) Hi Gregory, Thanks for the links! I've got one of each on the way to me. I've got an e-mail into the authors of the

Re: [time-nuts] Three-cornered hat on timelab?

Hi Bob, OK, I think I see my error.  I need to create a file of the successive phase differences in the timelab capture, right?  I haven't done this before, so... Bob - AE6RV.com GFS GPSDO list:

Re: [time-nuts] Three-cornered hat on timelab?

Hi If you convert the data to +/- 50 ns, you will have a problem at the edges. Much easier to deal with unwrapped data. The same CSV approach works for taking the pps data from a module, logging the sawtooth info and combining them. There’s no practical way to get the “real” RMS of the

[time-nuts] 5370 problems, was Re: Three-cornered hat on timelab?

Hi Tom et al, It looks like I've got a problem with my 5370 when collecting 10MHz data using an external arming signal.  I did some tests today, sending 10MHz through a ~10ft delay line (about 8.26ns) between the START and STOP inputs.  It's a mess, with some interval deltas being as high as 13

Re: [time-nuts] Three-cornered hat on timelab?

Hi Bob, Won't I have a problem with the phase wrap unless I convert the data to a range of +50ns to -50ns?  Or am I still looking at this incorrectly?  Bob - AE6RV.com GFS GPSDO list: groups.yahoo.com/neo/groups/GFS-GPSDOs/info

Re: [time-nuts] Three-cornered hat on timelab?

Hi, RMS is really a standard deviation estimation in classical context. This type of deviation estimation is however not useful for the types of noises we have, so that is why we needed a more powerful tool, and we ended up with the Allan Deviation in its place. Just as with RMS being the

Re: [time-nuts] Three-cornered hat on timelab?

Hi Dump it to a csv file and do it in Excel would be one way. You want to be able to control the process a bit so that would give you the ability to tweak the measurement. Bob > On May 3, 2017, at 11:01 AM, Bob Stewart wrote: > > Hi Bob, > > What I should have asked is

Re: [time-nuts] Three-cornered hat on timelab?

Hi Bob, What I should have asked is this: "how do I get that from a Timelab dataset?"    Bob From: Bob kb8tq To: Bob Stewart ; Discussion of precise time and frequency measurement Cc: Tom Van Baak Sent:

Re: [time-nuts] TAPR GPS kit end plate - final call

Right now the numbers are up substantially and I've asked P-M to hold off until later today before giving me a final quote. Steve WB0DBS > On May 2, 2017, at 7:48 PM, Bob kb8tq wrote: > > Hi > > Right now you are at 26 plates. There may be a price break at 25 there might >

Re: [time-nuts] Three-cornered hat on timelab?

Hi RMS: https://en.wikipedia.org/wiki/Root_mean_square When we talk about things like “6 sigma” in QA, the sigma is the RMS. Bob > On May 3, 2017, at 1:44 AM, Bob Stewart wrote: > > Hi Tom, > Could you clarify the term RMS?

Re: [time-nuts] Three-cornered hat on timelab?

Hi Tom, Could you clarify the term RMS?  Is there some sort of calculation I need to do on the raw data to get the RMS value? I'm going to begin by doing a fresh 8 hour test of GPSDO Unit 1 vs GPSDO Unit 2, with the same conditions as the tests involving the PRS.  IOW, the 5370 is being clocked