: Friday, August 23, 2013 1:25 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the
XO module?
Hi Alan,
I haven't seen this behaviour yet, but then I have RFTG shut off for a couple
of months since.
7168
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Guido Küppers
Sent: Friday, August 23, 2013 1:25 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO
module?
Hi Alan,
I
, September 12, 2013 8:01 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the
XO module?
Hi
Be very careful of using the same sensor to control your loop and to
determine how well the device is holding temperature
Hi Guido,
Do you have any idea why the unit interprets the date 7168 (0x1c00) days into
the future? If I send it today's date in the correct Motorola format, this is
how many days it adds to it. If I change the date to try another, it does the
same thing. Any idea why? I can correct for it
Hi Alan,
I haven't seen this behaviour yet, but then I have RFTG shut off for a couple
of months since.
7168 is dividible by 7 and the result is 1024. You know the gps week wraps over
from 1023 (0x3ff) to 0.
Perhaps what you see is the consequence of some software workaround of this
problem,
It can't be a coincidence that it is exactly 7*rollover.
Le 23 août 2013 à 17:57, Alan Kamrowski II a écrit :
Hi Guido,
Do you have any idea why the unit interprets the date 7168 (0x1c00) days into
the future? If I send it today's date in the correct Motorola format, this
is how many
PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO
module?
Hi Alan,
I haven't seen this behaviour yet, but then I have RFTG shut off for a couple
of months since.
7168 is dividible by 7 and the result is 1024
-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Guido Küppers
Sent: Friday, August 23, 2013 1:25 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the
XO module?
Hi Alan,
I
Am Samstag, den 17.08.2013, 23:05 -0500 schrieb Alan Kamrowski II:
Alan,
sent you the file by private mail. Note that serial data on this input
of the RFTG has to be ttl-level.
Have fun
Guido
Hi Guido,
yes it worked. I'll have to look through my software projects and send you
the source
[mailto:time-nuts-boun...@febo.com] On Behalf
Of Guido Küppers
Sent: Friday, August 16, 2013 3:29 AM
To: Rex; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO
module?
Von Samsung Mobile gesendet
Rex r...@sonic.net
Hi Guido,
the one I used was a Oncore UT.
The message needed for the RFTG is @@Ea..
So if I send the bytes: @@Ea.. it will accept the 1pps pulse?
Any idea on the baud rate, 9600 N 8 1 ?
Thanks for your help
Alan
___
time-nuts mailing
Hi Guido,
I found a manual here:
http://www.elgps.com/public_ftp/Documentos/SIRF_Protocol.pdf
I don't see the @@Ea.. sequence anywhere. Is it NMEA or SIRF Binary?
Any more tips before I try this?
Thanks,
Alan
___
time-nuts mailing list --
Hi Alan,
sorry for my misleading comment. What I meant was the RFTG will need @@Ea
messages coming from the UT. They contain the necessary gps data for the RFTG
to accept the pps pulse. You initiate on the UT by sending it a @@Ea request.
This has to be done for example y a PC running the
Hi Guido,
So you didn't fake the data from the UT, you only made something to ask the
UT to output it.
I see some UT units on eBay, but I don't recognize the antenna connectors.
I've got a small screw on antenna (SMA?), but the ones on eBay look like that
small round push on like I've seen
Alan,
wrong manual, the UT doesn't talk sirf as far as I remember. Although it can do
NMEA this is not what want. Try to find a manual for the motorola Oncore
receivers, the commands and messages I mentioned are specific to them.
Have fun,
Guido
Von Samsung Mobile gesendet
Alan Kamrowski II
Hi
All the UT cards that I have ever seen use the small push on antenna connector.
I have never seen one that directly takes anything normal like an SMA or a
BNC. You buy the card and then a bit of coax with the push on on one end and
(normally) an SMA on the other end.
The antenna for the
Am Samstag, den 17.08.2013, 09:56 -0500 schrieb Alan Kamrowski II:
Hi Guido,
So you didn't fake the data from the UT, you only made something to ask the
UT to output it.
That´s exactly what I did, although I used the fake approach before
that , when I didn't have a UT on hand.
I see some
Hi Guido,
That´s exactly what I did, although I used the fake approach before that ,
when I didn't have a UT on hand.
Was that successful? If I could just output the same data stream to it once a
second with the pulse from an AVR or something that would be great. Do you
still have this
Hi Bob,
All the UT cards that I have ever seen use the small push on antenna
connector.
I have never seen one that directly takes anything normal like an SMA or
a BNC.
You buy the card and then a bit of coax with the push on on one end and
(normally) an SMA on the other end.
The antenna for
From: Alan Kamrowski II ala...@earthlink.net
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Saturday, August 17, 2013 1:37 PM
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the
XO module?
Hi Guido,
That´s
Alan,
yes it worked. I'll have to look through my software projects and send you the
source file.
Have fun,
Guido
Von Samsung Mobile gesendet
Alan Kamrowski II ala...@earthlink.net hat geschrieben:
Hi Guido,
That´s exactly what I did, although I used the fake approach before that ,
when I
HI
On Aug 17, 2013, at 2:38 PM, Alan Kamrowski II ala...@earthlink.net wrote:
Hi Bob,
All the UT cards that I have ever seen use the small push on antenna
connector.
I have never seen one that directly takes anything normal like an SMA or
a BNC.
You buy the card and then a bit of coax
: Saturday, August 17, 2013 2:49 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO
module?
Alan,
yes it worked. I'll have to look through my software projects and send you the
source file.
Have fun,
Guido
Von
Hi Guido,
yes it worked. I'll have to look through my software projects and send you the
source file.
Please do, so far my attempt is just failing.
I'm trying to send:
//transmit gps data
txserial_putc('@');
txserial_putc('@');
checksum=0;
Been there, done that.
The RFTGm-RB can be disciplined if you connect the pps and the gps data stream
coming from a motorola Oncore.
Regards
Guido
Von Samsung Mobile gesendet
Rex r...@sonic.net hat geschrieben:
I don't think the rubidium module for these systems can be disciplined.
I think
of precise time and frequency measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO
module?
Von Samsung Mobile gesendet
Rex r...@sonic.net hat geschrieben:
I don't think the rubidium module for these systems can be disciplined.
I think they were only intended
Hi Everyone,
I've only got the RFTGm-II-Rb module. I found an interface cable
specification here:
http://www.ko4bb.com/Manuals/05%29_GPS_Timing/RFTG-m/RFTGm%20Interface%20Cab
le.pdf
Does anyone know if feeding a 1pps signal to pin 9 might discipline it? Or
does it need the other
I don't think the rubidium module for these systems can be disciplined.
I think they were only intended as a backup if the XO section or GPS
failed. The XO section does discipline but I don't know the details.
I'm not sure of the model number, Lucent had several variations on the
same theme
Hi Rex,
I don't think the rubidium module for these systems can be disciplined.
I think they were only intended as a backup if the XO section or GPS
failed.
The XO section does discipline but I don't know the details.
I was hoping since the rubidium module had a light for GPS and an input for
Hi
So your Rb is 0.71 ppb off frequency.
That's far enough that's it's worth adjusting. You should be able to get it 10X
better than that without a lot of work.
Bob
On Aug 15, 2013, at 6:02 PM, Alan Kamrowski II ala...@earthlink.net wrote:
Hi Rex,
I don't think the rubidium module for
Hi Bob,
Is it 0.71 ppb off or 0.071 ppb off?
This is how I calculated it:
13939010/13939 = 1000.000717411579022885429371
answer/1000 = 1.00717411579022885429371
answer-1 = 7.1741157902288542937083004519693e-11
answer*1e9 = 0.071741157902288542937083004519693
Thanks,
Alan
measurement
Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the
XO module?
Hi
Must have blinked counting all the zeros ..
Bob
On Aug 15, 2013, at 6:36 PM, Alan Kamrowski II ala...@earthlink.net
wrote:
Hi Bob,
Is it 0.71 ppb off or 0.071 ppb off?
This is how I
Hi
Must have blinked counting all the zeros ….
Bob
On Aug 15, 2013, at 6:36 PM, Alan Kamrowski II ala...@earthlink.net wrote:
Hi Bob,
Is it 0.71 ppb off or 0.071 ppb off?
This is how I calculated it:
13939010/13939 = 1000.000717411579022885429371
answer/1000 =
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