[time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Mark Sims
It might be eye candy, but is very useful eye candy when coupled with the 
satellite SNR values.  A GPSDO does not NEED any communications to the GPS or 
the outside world,  but EVERY commercial one does support it.  

The GPSDO firmware asks for the sat info from the GPS (so it can show it in the 
SYST:STAT status page) and, if it doesn't get it, it assumes the GPS is 
defective, crawls into a corner, and sobs.



> Isn’t info about what satellites are where, just eye candy and irrelevant to 
> a real GPSDO?
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Gerhard Hoffmann

Am 15.11.2017 um 05:06 schrieb Jerry Hancock:

problem solved.  I also have to get the 10Mhz out of the REF1 but that looks 
easy.
It is best to just double the 5 MHz that comes straight from the MTI-260 
oven.


<  http://www.hoffmann-hochfrequenz.de/downloads/DoubDist.pdf >

regards, Gerhard



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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Bill Hawkins
It's been a few years since I looked at this, but it seems to me that
the message from the receiver to the time processors included an
estimate of the reliability of the satellite data. That estimate depends
on satellites being in the predicted positions. If there is an error,
the time data is marked as invalid.

The old messages had 6 satellites, and the newer messages had 8. The
messages were identical, except that the newer message reported 2 more
satellites. An older time processor would not have been able to handle
the new 8 sat message. So, no, you can't mix old and new RFTG modules.

If this sounds like I know what I'm saying, you may be disappointed.

Bill Hawkins


-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tim
Shoppa
Sent: Tuesday, November 14, 2017 9:53 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

Isn't info about what satellites are where, just eye candy and
irrelevant to a real GPSDO?

Tweaks to the elevation mask ought to be measurable in the PPS quality
(if they aren't then they're irrelevant).

Tim


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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
I can’t find the instructions on how to make the REF1 work without the REF0.  
Other than adding the 10Mhz, do I have to do anything to it to enable it to run 
without the REF0?

> On Nov 14, 2017, at 7:52 PM, Tim Shoppa  wrote:
> 
> Isn’t info about what satellites are where, just eye candy and irrelevant to 
> a real GPSDO?
> 
> Tweaks to the elevation mask ought to be measurable in the PPS quality (if 
> they aren’t then they’re irrelevant).
> 
> Tim
> 
>> On Nov 14, 2017, at 10:39 PM, Mark Sims  wrote:
>> 
>> The M12 uses different commands for sending a lot of the data since it is 
>> tracking more sats and the old commands were limited to 6 or 8 sats.   I 
>> doubt it would work the the RFTG.  There might also be a 3V vs 5V problem.
>> ___
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
It turns out I don't have an M12+ in the TAPR GPS.  I always knew I had an 
older model.  I 
checked the numbers and pictures and it it just what I need, an Oncore UT+.  So 
the first 
thing I need to do is get my REF1 standalone and then add this GPS to the REF0 
and 
problem solved.  I also have to get the 10Mhz out of the REF1 but that looks 
easy.

Thanks for all the pointers.

Jerry


On 14 Nov 2017 at 17:33, Jerry Hancock wrote:

> Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks 
> quite a bit 
> like the M12+ I have.  Peter mentions something about firmware in the Oncore. 
>  Anyone 
> know if there would be an issue between using the Oncore and the 12+?
> 
> If this works then I can just drop in my 12+, remove a few jumpers and Bob's 
> my uncle.
> 
> I sent Peter a note.  Is he active on this forum?
> 
> Thoughts?
> 
> Jerry
> 
> On 15 Nov 2017 at 0:38, Mark Sims wrote:
> 
> > There is also a nice pdf out there by Peter Garde that tells how to add a 
> > GPS receiver to the non-GPD RFTG.  It involves moving around 6 0-ohm (?) 
> > resistors and plugging in an old Motorola (UT+) receiver.   I found the pdf 
> > on EEVBLOG.
> > 
> > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Tim Shoppa
Isn’t info about what satellites are where, just eye candy and irrelevant to a 
real GPSDO?

Tweaks to the elevation mask ought to be measurable in the PPS quality (if they 
aren’t then they’re irrelevant).

Tim

> On Nov 14, 2017, at 10:39 PM, Mark Sims  wrote:
> 
> The M12 uses different commands for sending a lot of the data since it is 
> tracking more sats and the old commands were limited to 6 or 8 sats.   I 
> doubt it would work the the RFTG.  There might also be a 3V vs 5V problem.
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[time-nuts] Deaf Z3801

2017-11-14 Thread Bob Bownes

I put my 3801 back in service the day before yesterday, or tried to. It’s been 
on the shelf for about a year (off). 

I powered it up, and while it sees a few sats, it will not acquire any. 
Changing to a known good antenna (off the NTP server) makes no difference. 

Anyone seen the behavior before? The location data is good, but the time/date 
are way out. 

Thanks!
Bob
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[time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Mark Sims
The M12 uses different commands for sending a lot of the data since it is 
tracking more sats and the old commands were limited to 6 or 8 sats.   I doubt 
it would work the the RFTG.  There might also be a 3V vs 5V problem.
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks 
quite a bit 
like the M12+ I have.  Peter mentions something about firmware in the Oncore.  
Anyone 
know if there would be an issue between using the Oncore and the 12+?

If this works then I can just drop in my 12+, remove a few jumpers and Bob's my 
uncle.

I sent Peter a note.  Is he active on this forum?

Thoughts?

Jerry

On 15 Nov 2017 at 0:38, Mark Sims wrote:

> There is also a nice pdf out there by Peter Garde that tells how to add a GPS 
> receiver to the non-GPD RFTG.  It involves moving around 6 0-ohm (?) 
> resistors and plugging in an old Motorola (UT+) receiver.   I found the pdf 
> on EEVBLOG.
> 
> https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
I remember seeing that pdf and thinking that the Motorola UT+ mounts look a lot 
like the 
Motorola 12+ and was wondering if would just fit.  I'll go back and look.  
Thanks.

On 15 Nov 2017 at 0:38, Mark Sims wrote:

> There is also a nice pdf out there by Peter Garde that tells how to add a GPS 
> receiver to the non-GPD RFTG.  It involves moving around 6 0-ohm (?) 
> resistors and plugging in an old Motorola (UT+) receiver.   I found the pdf 
> on EEVBLOG.
> 
> https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV
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[time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Mark Sims
There is also a nice pdf out there by Peter Garde that tells how to add a GPS 
receiver to the non-GPD RFTG.  It involves moving around 6 0-ohm (?) resistors 
and plugging in an old Motorola (UT+) receiver.   I found the pdf on EEVBLOG.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV
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Re: [time-nuts] Jefferts & Campbell recent papers

2017-11-14 Thread Tom Van Baak
> These may be of interest, if the papers have not been circulated here before. 
> — Eric

Links to the cesium and optical clock papers that Eric just mentioned are:

1)
"Cesium Primary Frequency References"
by Steven R. Jefferts, Thomas P. Heavner, Elizabeth A. Donley
  http://tf.boulder.nist.gov/general/pdf/1924.pdf
also at:
  
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.527.4789&rep=rep1&type=pdf

2)
"Ultracold atoms and precise time standards"
by Gretchen K. Campbell, William D. Phillips
  http://rsta.royalsocietypublishing.org/content/369/1953/4078
PDF:
  http://rsta.royalsocietypublishing.org/content/roypta/369/1953/4078.full.pdf

See also this powerpoint presentation by the same:

"Ultracold Atoms and Precise Time Standards"
by William D. Phillips and Gretchen Campbell
  https://www.bipm.org/utils/common/pdf/RoySoc/Bill_Phillips.pdf

--

And while we're at it, let me repeat these other papers mentioned recently.

3)
"A New Era for Atomic Clocks"
by Laura Ost
  https://phys.org/news/2014-02-era-atomic-clocks.html
  https://www.nist.gov/news-events/news/2014/02/new-era-atomic-clocks

4)
"When should we change the definition of the second?"
by Patrick Gill
  http://rsta.royalsocietypublishing.org/content/369/1953/4109.article-info
PDF at:
  http://rsta.royalsocietypublishing.org/content/roypta/369/1953/4109.full.pdf

5)
"Optical Atomic Clocks"
by Andrew D. Ludlow, Martin M. Boyd, Jun Ye, Ekkehard Peik, Piet O. Schmidt
  https://arxiv.org/abs/1407.3493
PDF at:
  https://arxiv.org/pdf/1407.3493.pdf

Exciting times.

/tvb


- Original Message - 
From: "Eric Scace" 
To: 
Sent: Tuesday, November 14, 2017 2:12 PM
Subject: [time-nuts] Jefferts & Campbell recent papers


These may be of interest, if the papers have not been circulated here before. — 
Eric


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[time-nuts] Jefferts & Campbell recent papers

2017-11-14 Thread Eric Scace
These may be of interest, if the papers have not been circulated here before. — 
Eric

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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Bob Camp
Hi

If you compare the PPS output of a simple GPS module (any of them) to a 
properly functioning GPSDO, you will see jumps in the module output. They
are a function of the way all of the modules quantize the PPS signal. For higher
resolution on the PPS you would have to use the sawtooth correction message
to somehow modify the PPS signal. 

Some GPSDO’s slip phase on the PPS as part of the alignment process so you 
can never say that there are only jumps in a bare module. GPSDO’s also steer
frequency to keep the PPS aligned. The damping (lag) in this process results in 
errors 
both in frequency and in the PPS edge. 

So, none of it is perfect (this is Time Nuts …). All of it has “issues” if you 
look 
close enough. A Frequency Nut would complain about some things and a 
Time (only) Nut wold complain about others. That’s not true in an absolute 
sense, but it is true in terms of what each would optimize for on a real world
device. 

Bob

> On Nov 14, 2017, at 12:55 PM, Jerry Hancock  wrote:
> 
> Thomas, Yes, thank you, I read the work Dan posted.  
> 
> I have this TAPR GPS with the M12+ board in it that I received for free after 
> machining the end plates and the unused standby REF0 or REF1, can’t remember 
> which has the GPS in it.  I would like to have another 10Mhz standard in my 
> office.  I also have an OCXO out of my Tektronix 11301 I was given but that 
> uses a trimmer that I can’t really mod to discipline so that option of GPS + 
> OCXO is out.  So I wouldn’t mind figuring out a way to take the TAPR GPS and 
> feed it into the spare REF unit not unlike what the other REF unit is doing.  
> I would then have to fake some data per Dan’s site.  Having written this,  I 
> just might do this project now that I think about it. I could then also use 
> an STM32F7 board with display to post a clock as well.  I guess I would also 
> have to tap off the (debatably dirty) 10Mhz signal internally in the one that 
> is missing.
> 
> I’m going to go back and reread Dan’s paper.  There were questions about the 
> sawtooth IIRC and I remember seeing it when I compared the output of the TAPR 
> 1PPS vs the Lucent 1PPS as they would jump phase by successive increments and 
> then bounce back.  I don’t think we ever determined which one was moving but 
> I remember someone telling me it was most likely related to a sawtooth in the 
> discipline.  I don’t know enough about these things to say for sure, but 
> watching the 1PPS vs the other made me start to wonder about the absolute 
> phase accuracy of those signals.   You would have thought they would have 
> been perfectly in phase, no?  I go to bed at night with the confidence that 
> the free TAPR GPS is the culprit vs my Lucent that which cost me $200 when 
> all done.
> 
> So in summary, I have to plug the GPS REF unit, tap-off the 10Mhz someplace 
> on one or the other, feed the second REF unit with my TPAR GPS then also send 
> it some text (which is known by Dan) and I should get a second disciplined 
> 10Mhz unit.  This will take me a few weeks during which I will get bored and 
> forget why I was doing it in the first place.  So please remind me when I 
> post back.
> 
> Jerry
> 
> 
>> On Nov 14, 2017, at 8:50 AM, Thomas Petig  wrote:
>> 
>> Hi Jerry,
>> the 15 MHz is disabled by default, just bridging some pins enables the
>> output:
>> http://syncchannel.blogspot.se/2015/11/denuo-gps-hits-rev-b-dongles.html
>> 
>> If you want to insert some 1PPS signal to discipline it, you need some
>> fake some GPS messages. Dan has done some nice work here, a small ATTiny
>> is sufficient.
>> 
>> /Thomas, SA6CID
>> 
>> 
>> On Tue, Nov 14, 2017 at 08:30:54AM -0800, Jerry Hancock wrote:
>>> Bob, I thought you had to send it code, etc?  I have the two units
>>> with cable, etc running upstairs.  I want another one for in my office
>>> but the same guy only sells the REF0 and REF1 units separately now
>>> without the cable.  I thought about splitting the two and using this
>>> other GPS unit I have (it was one of the TAPR GPS Kits) to send the
>>> other one the 1pps.  You’re saying all you need is a plug?  I would
>>> need two functioning units.
>>> 
>>> Regards,
>>> 
>>> Jerry
>>> 
>>> 
>>> Jerry Hancock
>>> je...@hanler.com
>>> (415) 215-3779
>>> 
 On Nov 14, 2017, at 8:13 AM, Bob Camp  wrote:
 
 Hi
 
 If you are going to get out the soldering iron, why simply make up a plug
 to run the GPS unit stand alone?  Keep the second unit powered down 
 as a set of spare parts….. Yes, it does depend a bit on what you are doing 
 with them ….
 
 Bob
 
> On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
> 
> Anyone have a spare cable for the Lucent setup?  I guess I can make one 
> with some DB15 connectors but trying to skip the effort.
> 
> Thanks
> 
> Jerry
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
Thomas, Yes, thank you, I read the work Dan posted.  

I have this TAPR GPS with the M12+ board in it that I received for free after 
machining the end plates and the unused standby REF0 or REF1, can’t remember 
which has the GPS in it.  I would like to have another 10Mhz standard in my 
office.  I also have an OCXO out of my Tektronix 11301 I was given but that 
uses a trimmer that I can’t really mod to discipline so that option of GPS + 
OCXO is out.  So I wouldn’t mind figuring out a way to take the TAPR GPS and 
feed it into the spare REF unit not unlike what the other REF unit is doing.  I 
would then have to fake some data per Dan’s site.  Having written this,  I just 
might do this project now that I think about it. I could then also use an 
STM32F7 board with display to post a clock as well.  I guess I would also have 
to tap off the (debatably dirty) 10Mhz signal internally in the one that is 
missing.

I’m going to go back and reread Dan’s paper.  There were questions about the 
sawtooth IIRC and I remember seeing it when I compared the output of the TAPR 
1PPS vs the Lucent 1PPS as they would jump phase by successive increments and 
then bounce back.  I don’t think we ever determined which one was moving but I 
remember someone telling me it was most likely related to a sawtooth in the 
discipline.  I don’t know enough about these things to say for sure, but 
watching the 1PPS vs the other made me start to wonder about the absolute phase 
accuracy of those signals.   You would have thought they would have been 
perfectly in phase, no?  I go to bed at night with the confidence that the free 
TAPR GPS is the culprit vs my Lucent that which cost me $200 when all done.

So in summary, I have to plug the GPS REF unit, tap-off the 10Mhz someplace on 
one or the other, feed the second REF unit with my TPAR GPS then also send it 
some text (which is known by Dan) and I should get a second disciplined 10Mhz 
unit.  This will take me a few weeks during which I will get bored and forget 
why I was doing it in the first place.  So please remind me when I post back.

Jerry


> On Nov 14, 2017, at 8:50 AM, Thomas Petig  wrote:
> 
> Hi Jerry,
> the 15 MHz is disabled by default, just bridging some pins enables the
> output:
> http://syncchannel.blogspot.se/2015/11/denuo-gps-hits-rev-b-dongles.html
> 
> If you want to insert some 1PPS signal to discipline it, you need some
> fake some GPS messages. Dan has done some nice work here, a small ATTiny
> is sufficient.
> 
> /Thomas, SA6CID
> 
> 
> On Tue, Nov 14, 2017 at 08:30:54AM -0800, Jerry Hancock wrote:
>> Bob, I thought you had to send it code, etc?  I have the two units
>> with cable, etc running upstairs.  I want another one for in my office
>> but the same guy only sells the REF0 and REF1 units separately now
>> without the cable.  I thought about splitting the two and using this
>> other GPS unit I have (it was one of the TAPR GPS Kits) to send the
>> other one the 1pps.  You’re saying all you need is a plug?  I would
>> need two functioning units.
>> 
>> Regards,
>> 
>> Jerry
>> 
>> 
>> Jerry Hancock
>> je...@hanler.com
>> (415) 215-3779
>> 
>>> On Nov 14, 2017, at 8:13 AM, Bob Camp  wrote:
>>> 
>>> Hi
>>> 
>>> If you are going to get out the soldering iron, why simply make up a plug
>>> to run the GPS unit stand alone?  Keep the second unit powered down 
>>> as a set of spare parts….. Yes, it does depend a bit on what you are doing 
>>> with them ….
>>> 
>>> Bob
>>> 
 On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
 
 Anyone have a spare cable for the Lucent setup?  I guess I can make one 
 with some DB15 connectors but trying to skip the effort.
 
 Thanks
 
 Jerry
 ___
 time-nuts mailing list -- time-nuts@febo.com
 To unsubscribe, go to 
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
 and follow the instructions there.
>>> 
>>> ___
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>> 
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Thomas Petig
Hi Jerry,
the 15 MHz is disabled by default, just bridging some pins enables the
output:
http://syncchannel.blogspot.se/2015/11/denuo-gps-hits-rev-b-dongles.html

If you want to insert some 1PPS signal to discipline it, you need some
fake some GPS messages. Dan has done some nice work here, a small ATTiny
is sufficient.

/Thomas, SA6CID


On Tue, Nov 14, 2017 at 08:30:54AM -0800, Jerry Hancock wrote:
> Bob, I thought you had to send it code, etc?  I have the two units
> with cable, etc running upstairs.  I want another one for in my office
> but the same guy only sells the REF0 and REF1 units separately now
> without the cable.  I thought about splitting the two and using this
> other GPS unit I have (it was one of the TAPR GPS Kits) to send the
> other one the 1pps.  You’re saying all you need is a plug?  I would
> need two functioning units.
> 
> Regards,
> 
> Jerry
> 
> 
> Jerry Hancock
> je...@hanler.com
> (415) 215-3779
> 
> > On Nov 14, 2017, at 8:13 AM, Bob Camp  wrote:
> > 
> > Hi
> > 
> > If you are going to get out the soldering iron, why simply make up a plug
> > to run the GPS unit stand alone?  Keep the second unit powered down 
> > as a set of spare parts….. Yes, it does depend a bit on what you are doing 
> > with them ….
> > 
> > Bob
> > 
> >> On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
> >> 
> >> Anyone have a spare cable for the Lucent setup?  I guess I can make one 
> >> with some DB15 connectors but trying to skip the effort.
> >> 
> >> Thanks
> >> 
> >> Jerry
> >> ___
> >> time-nuts mailing list -- time-nuts@febo.com
> >> To unsubscribe, go to 
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> > 
> > ___
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> > To unsubscribe, go to 
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> > and follow the instructions there.
> 
> ___
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> 
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Bob Camp
Hi

Just going by memory (never a good thing ….); You can make the GPS unit believe 
that it has a “slave” present *and* that the slave is not working properly. 
It’s all done
with logic levels. In the “slave down” mode, the unit with the GPS puts out the 
15 MHz
and all the messages. The thing you loose is the (dirty) 10 MHz output from the 
slave.

Bob

> On Nov 14, 2017, at 11:30 AM, Jerry Hancock  wrote:
> 
> Bob, I thought you had to send it code, etc?  I have the two units with 
> cable, etc running upstairs.  I want another one for in my office but the 
> same guy only sells the REF0 and REF1 units separately now without the cable. 
>  I thought about splitting the two and using this other GPS unit I have (it 
> was one of the TAPR GPS Kits) to send the other one the 1pps.  You’re saying 
> all you need is a plug?  I would need two functioning units.
> 
> Regards,
> 
> Jerry
> 
> 
> Jerry Hancock
> je...@hanler.com
> (415) 215-3779
> 
>> On Nov 14, 2017, at 8:13 AM, Bob Camp  wrote:
>> 
>> Hi
>> 
>> If you are going to get out the soldering iron, why simply make up a plug
>> to run the GPS unit stand alone?  Keep the second unit powered down 
>> as a set of spare parts….. Yes, it does depend a bit on what you are doing 
>> with them ….
>> 
>> Bob
>> 
>>> On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
>>> 
>>> Anyone have a spare cable for the Lucent setup?  I guess I can make one 
>>> with some DB15 connectors but trying to skip the effort.
>>> 
>>> Thanks
>>> 
>>> Jerry
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to 
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> 
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> ___
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> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Jerry Hancock
Bob, I thought you had to send it code, etc?  I have the two units with cable, 
etc running upstairs.  I want another one for in my office but the same guy 
only sells the REF0 and REF1 units separately now without the cable.  I thought 
about splitting the two and using this other GPS unit I have (it was one of the 
TAPR GPS Kits) to send the other one the 1pps.  You’re saying all you need is a 
plug?  I would need two functioning units.

Regards,

Jerry


Jerry Hancock
je...@hanler.com
(415) 215-3779

> On Nov 14, 2017, at 8:13 AM, Bob Camp  wrote:
> 
> Hi
> 
> If you are going to get out the soldering iron, why simply make up a plug
> to run the GPS unit stand alone?  Keep the second unit powered down 
> as a set of spare parts….. Yes, it does depend a bit on what you are doing 
> with them ….
> 
> Bob
> 
>> On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
>> 
>> Anyone have a spare cable for the Lucent setup?  I guess I can make one with 
>> some DB15 connectors but trying to skip the effort.
>> 
>> Thanks
>> 
>> Jerry
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

___
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Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable

2017-11-14 Thread Bob Camp
Hi

If you are going to get out the soldering iron, why simply make up a plug
to run the GPS unit stand alone?  Keep the second unit powered down 
as a set of spare parts….. Yes, it does depend a bit on what you are doing 
with them ….

Bob

> On Nov 13, 2017, at 11:50 PM, Jerry Hancock  wrote:
> 
> Anyone have a spare cable for the Lucent setup?  I guess I can make one with 
> some DB15 connectors but trying to skip the effort.
> 
> Thanks
> 
> Jerry
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

___
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and follow the instructions there.