Hi Stewart
Yup, I was certainly wrong re the conditioning, sorry about that and
thanks for the correction.
I was under the impression from way back that in the original RFTG setup it
was only the OCXO that was GPS conditioned but see now the manual, that
I've also had from way back,
Hi Arthur,
Thanks for the photo, I was just going to play it by ear but it's always
handy to have a starting point.
I did take a look back at June 2010 and eventually found your RFTG comments
under a discussion on the Z3815A, so might be why I didn't recall seeing
them previously, and
Hi Dave
Many thanks for the MTI260 data, that's very useful and much appreciated.
As regards the the Z38xx modules, my Z3801As actually measure 10 9/16
between the front panel edges but obviously still too much to fit two like that
into a standard 19 inch rack.
I've considered two
Plan B and a half. or C and three quarters or whatever:-)
I just measured a Z3801A case, can't speak for any others in the series,
and that measures 9 1/4 inches from one outside edge of the front panel to
the opposite side of the box itself.
Cutting off opposing edges from two front
, 2014 at 5:53 PM, GandalfG8--- via time-nuts
_time-nuts@febo.com_ (mailto:time-nuts@febo.com) wrote:
Plan B and a half. or C and three quarters or whatever:-)
I just measured a Z3801A case, can't speak for any others in the series,
and that measures 9 1/4 inches from one outside edge
strap the rear square
frame posts together. Add the 2U (each 'U' is 1-3/4) rack mount
flanges and you're good to go.
Mike
On 10/22/2014 4:26 PM, GandalfG8--- via time-nuts wrote:
Hi Dave
Many thanks for the MTI260 data, that's very useful and much
appreciated.
As regards
, and vice versa, unless the firmware
prevents that.
Bob
From: GandalfG8--- via time-nuts time-nuts@febo.com
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A,
Z3811A, Z3812...
It seems from the auction revision
the road, someone will come up with the
mods to convert a REF-1 into a REF-0, and vice versa, unless the firmware
prevents that.
Bob
From: GandalfG8--- via time-nuts time-nuts@febo.com
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Subject: Re: [time-nuts] Lucent
More than one way to skin an egg, or something like that anyway:-)
A Google search on Vaish Milliren turned up this paper and another on the
260.
_www.mti-milliren.com/MTIPapers/Rubidium_Perf_in_260.pdf_
(http://www.mti-milliren.com/MTIPapers/Rubidium_Perf_in_260.pdf)
Oh well, how's about Plan Z?
I just checked the Milliren site and those papers are available from the
front page under Technical Notes:-)
Regards
Nigel
GM8PZR
In a message dated 23/10/2014 22:12:17 GMT Daylight Time,
p...@petelancashire.com writes:
Anyone have a IEEE account ?
units at this point. Maybe, down the road, someone will come up with the
mods to convert a REF-1 into a REF-0, and vice versa, unless the
firmware
prevents that.
Bob
From: GandalfG8--- via time-nuts time-nuts@febo.com
To: time-nuts@febo.com
Sent: Tuesday, October 21, 2014 5:59 AM
Hi Bob
If REF-0 is the only one that can output the data that would certainly put
me in a shot myself in the foot position wouldn't it?:-)
However, we do know from Arthur that REF-1 will operate stand alone, so
assuming you haven't got a faulty unit, which I suspect is pretty unlikely,
I've confirmed from the model number that the GPS module on these is indeed
an Oncore UT+.
There's a Synergy engineering note available regarding Oncore battery
backup, and one place a copy can be found is here...
http://f6fgz.free.fr/Fichiers/GPS/Backup_Battery_Considerations.pdf
If so
Well, I'm happy to report that Arthur's modification does do the trick,
although I don't know why as I don't have any data for the interface as yet.
I daren't disturb the 15 pin connector right now as this Z3811A PCB is
still out of its case and connected to a breadboard with wires just
, and you just had to connect the pins listed together,
or whether this was a new circuit that had to be inserted. Sounds like
the latter?
Anthony
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
GandalfG8--- via time-nuts
Sent: Saturday, November 01
any result
of that.
Bob
On Nov 1, 2014, at 7:05 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Anthony,
It's a new circuit that has to be inserted, which is what I've done, but
I'm not sure whether or not it's strictly necessary for the unit to
function
Hi Arthur,
Thanks for the extra information, it sounds like you may well have answered
my question:-)
As I commented to Bob, I was hoping I might be able to find an option that
didn't require any internal access, I knew that was a long shot anyway but
I quite liked the idea of a plug and
2) Enable the 15 MHz out
It will try to disciple the OCXO, but you won’t be able to see any
result
of that.
Bob
On Nov 1, 2014, at 7:05 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Anthony,
It's a new circuit that has to be inserted, which is what I've
on one of the many unused
alarm pins.
Bob
On Nov 1, 2014, at 9:52 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Bob,
I understand the consequences of not modifying the unit but, having done
so
and having a REF-1 unit running stand alone, I was just commenting
Ooh err, whoops, and oh dear !!
Arthur, I've only just had a chance to look at your latest photos, and
unless I've really got my wires crossed, if you'll pardon the expression:-),
your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins 4, 6,
11, and 13.
As far as I'm aware
Oh well, and perhaps not too surprisingly, the J5 pin 3 to ground option on
its own was not that much of a raging success.
However, the unit did eventually come up indicating Standby, and at that
point pulling out the pin 3 to ground link and inserting the previously
made up plug switched
…). Keep up the information stream. Keeping the
information on the list puts it into the archives so it can be dug up by
everybody.
Bob
On Nov 2, 2014, at 9:44 AM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Oh well, and perhaps not too surprisingly, the J5 pin 3 to ground option
Hi Ed
It's a Motorola Oncore UT plus R5122U1152, listed as one of their standard
versions with version 2.2 firmware.
A google search on motorola oncore tech note, with or without the quotes,
should bring up relevant data from TAPR and other sources.
I haven't had one running for very
Hi Gotz
That's great stuff, thank you, I'll try that later.
At this rate we'll soon be finding ways of doing this without any wiring
whatsoever, perhaps we could start with just standing it upside down in a
dark corner on the night of the full moon:-)
Regards
Nigel
GM8PZR
In a
to use to attach an OCXO to a newer GPS (like the Jackson Labs
part …).
Bob
On Nov 2, 2014, at 2:15 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Gotz
That's great stuff, thank you, I'll try that later.
At this rate we'll soon be finding ways of doing this without any
. When I did the other
connectors, I just ran through them with a DVM. 2.5V = 422 input, 1.5 or 3.5
= 422 output. I didn’t have any CMOS. Everything else was either open
circuit or ground.
Bob
On Nov 2, 2014, at 3:01 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Ah, I had
Hi Bob
The UT+ data sheet from 1998 quotes an external backup supply of 2.5 to
5.35V with a drain of 5uA typical at 2.5 Volts.
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 20:41:44 GMT Standard Time, kb...@n1k.org
writes:
Hi
The numbers quoted earlier (and they sound right)
correction. That is an interesting observation (if true). These boxes have
roots
in the paranoid GPS SA era, so that might not be a big surprise.
Bob
On Nov 2, 2014, at 3:32 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Given the expected close proximity of these units, presumably
, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Bob
The UT+ data sheet from 1998 quotes an external backup supply of 2.5 to
5.35V with a drain of 5uA typical at 2.5 Volts.
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 20:41:44 GMT Standard Time, kb...@n1k.org
Thanks Gotz
2 and 3 grounded works fine for me too, although I still have one unit that
insists on flashing the ON light rather than bringing it on solid. In all
other respects both units seem to match. Two more should be arriving
sometime in the next couple of weeks so will see how they
in the “to be discovered” category. One of those
should be the other half of D. Something in here should be a PPS.
Bob
On Nov 2, 2014, at 5:48 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Thanks Gotz
2 and 3 grounded works fine for me too, although I still have one unit
that
insists
Bob
It's possible that what you're seeing might well be normal operation when
they're operating as a pair, since Ref-0, what we've been calling the slave
because it has no GPS receiver, is actually the default master in
operational terms.
I only have Ref-1 units operating stand alone so
Z3811A ON LED flashing.problem solved!
If only it was always this easy:-)
It turns out this is what happens if you switch the Output Level from 17
to 23, obviously an advisory indication to draw attention to the higher
output.
Switching it back reduces the level, as expected, and
Hi Arthur
Thanks for your further comments, and certainly no need for the sorry.
It was your pioneering work that inspired recent efforts to start with,
and the confusion over the pin numbers that led Gotz to the, just grounding
pins 2 and 3, 2 link solution we have now.
Overall, I'd
Ah, that's interesting, perhaps it wasn't me after all then.
Did you have the same flashing ON light symptoms?
Regards
Nigel
GM8PZR
In a message dated 03/11/2014 17:56:56 GMT Standard Time,
hmur...@megapathdsl.net writes:
It turns out this is what happens if you switch the Output
Verrry nice Stu, thank you, having both units obviously does have its
advantages after all:-)
Pin 3 certainly controls the standby indication on the Z3811A and it's
comforting to know it is indeed a solid ground during normal operation.
However, given the low logic level seen on pin 2 I'm
I’ve looked
at.
ADEV on a short run looks better than an un-tuned TBolt. I’ll need a much
longer run to see what it’s really doing.
Bob
On Nov 3, 2014, at 1:20 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Ah, that's interesting, perhaps it wasn't me after all
Is anyone else with an AOL email address still seeing problems?
I'm receiving some, but not all, of my own posts to the list, with the
bounce count on my time-nuts subscription page going up accordingly.
It seems to have reset a couple of times recently but is now up to 4
again, and the
something is working, or the list simply got
inundated with Lucent KS-24361 related emails.
Bye,
Said
Sent from my iPad
On Nov 4, 2014, at 7:12, GandalfG8--- via time-nuts time-nuts@febo.com
wrote:
Is anyone else with an AOL email address still seeing problems?
I'm receiving some
For what it's worth, here's what happened when I linked two Ref-1 units
together
One was fitted with it's GPS module as normal, I'll call this Ref-1.
The other was as normal other than having it's GPS module removed, I'll
call this Ref-1-0.
The link cable was around 15 inches long and
PS, re two Ref-1 units linked
I forgot to mention that unlike Stewart's comment re a normal pair below,
my Ref-1 continues to show GPS 1PPS Valid
It would seem there's some of the handshaking working ok but not much
actual activity being shared, will have a further poke about later.
that it will improve. Figuring out what the last few pairs do
would be a nice thing.
Bob
On Nov 5, 2014, at 7:20 AM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
For what it's worth, here's what happened when I linked two Ref-1 units
together
One was fitted with it's
Hi Paul
Prime question is what are you calling the slave unit?
In normal use Lucent treats the Ref-0 unit as the master and Ref-1 as the
slave, but it's Ref-1 that contains the GPS module. Bit confusing but if
you've got Ref-1 with the GPS module then you're in business:-)
It's turned out
never a dull moment:-)
Regards
Nigel
GM8PZR
In a message dated 06/11/2014 12:04:47 GMT Standard Time, kb...@n1k.org
writes:
Hi
On Nov 6, 2014, at 3:44 AM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Paul
Prime question is what are you calling the slave unit?
1
with sawtooth ...
Bob
On Nov 6, 2014, at 7:52 AM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Bob
I view the master/slave situation the same way you do, but only
commented
because Lucent effectively sets things up the other way round so just
wanted to be sure
this to see that it works on at least one other box.
Bob
On Nov 7, 2014, at 4:03 AM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Hi Bob
Very many thanks for the prod re the Diagnostic port.
Considering the other GPS kit I talk to using Hyperterminal and the
like, often because
in this way.
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of
GandalfG8--- via time-nuts
Sent: Friday, November 07, 2014 11:39 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several
questions
Hi Anthony
Which one are you using?
The bottom one referred to on Didier's site is the old Windows 3 version,
perhaps even DOS, going back to 1993 or thereabouts.
The later version is the one marked Satstat50, actually SatStat 5.0 and a
Symmetricom release from 2001.
I can't try it on Win7 right
Of
GandalfG8--- via time-nuts
Sent: Friday, November 07, 2014 2:11 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several
questions
When you say, all of that is what you see...
Do you mean you go through the SatStat start sequence and you see
Goetz Romahn about a new version of Z38XX that will
work correctly with the 3810/11/12. The previous version worked fine under
XP. It’s a far better program to use than SatStat.
Bob
On Nov 7, 2014, at 3:48 PM, GandalfG8--- via time-nuts
time-nuts@febo.com wrote:
Which one are you using
In a message dated 09/11/2014 21:33:48 GMT Standard Time,
t...@leapsecond.com writes:
and 27 8×10 color glossy pictures with circles and arrows and a paragraph
on the back of each one.
Now that's not something I've heard for a while:-)
Nigel
GM8PZR
LOL
Happy Thanksgiving:-)
In a message dated 10/11/2014 00:23:32 GMT Standard Time, d...@montana.com
writes:
You can get anything you want...
GandalfG8--- via time-nuts
In a message dated 09/11/2014 21:33:48 GMT Standard Time,
t...@leapsecond.com writes:
and 27 8×10 color glossy
Hi Ignacio
I have removed a faulty oscillator from one of these, not one of my more
relaxed moments and quite amazed when the board emerged totally undamaged,
but proof at least that it can be done:-)
With the oscillator removed there's access to two sets of connector pads
that will
Hi Paul,
I haven't used the Starloc II, so can't offer any direct help/advice, but
I did find manuals for the Starloc II and Starloc II plus when searching
for Starloc-Lite data a few years ago.
As always I hoarded what I found, which makes this your lucky day rather
than mine as I
the notes and figures and I'll upload it to some place.
Best regards,
Ignacio
El 12/11/2014 a las 11:47, GandalfG8--- via time-nuts escribió:
Hi Ignacio
I have removed a faulty oscillator from one of these, not one of my more
relaxed moments and quite amazed when the board emerged totally
Hi Said,
Many thanks for your reply.
I'd realised that R2 and R3 were in the paths of alternative power feeds
but had managed to convince myself that both resistors were shown to be
fitted in your auction photos, although I can now see quite clearly that
whilst
R2 is fitted, R3 isn't,
Having dived in with great enthusiasm as soon as the LTE-Lite was made
available I've had it on test for a couple of days now and have not been
disappointed, I'm very impressed.
However, given the number of existing GPS and other off air systems and
projects already running here I have to
I'm working on a 2100F Loran-C receiver that boots up ok and seems to pass
the built in test routines, but after accepting a GRI it just sits in
acquire mode. I know the signal is good.
I've got the manual for the 2100 timing version, my scan of that is on the
KO4BB manuals site if anybody
Bevor I heat up the big soldering iron to remove the OCXO, I wanted to
ask if anybody else experienced this before and if anybody can confirm
that tuning voltage range is indeed 0..6 Volt. If so, replacing the OCXO
should cure the problem.
Hi Mathias
I've not experience your problem
, 2015 at 8:54 AM, GandalfG8--- via time-nuts
_time-nuts@febo.com_ (mailto:time-nuts@febo.com) wrote:
I've been trying to locate a manual for the MtronPTI M9101 series GPSDOs,
an M9103 series manual would probably also be ok.
There are references and links online to a PDF manuals section
H
I think I'm convinced, I had my doubts to start with and now have enough
more to ensure I follow a different route:-)
Regards
Nigel
GM8PZR
Hi
If they are indeed grabbing anything in that package and re-labeling it, I
would
be very careful. True TCXO’s (full compensation
Hi Tim,
Thanks for your comments and I did wonder about the plating, in the photo
for the auction number I gave I couldn't decide if the bottom of the can
was corroded or just badly plated.
Regards
Nigel
GM8PZR
Mainstream TCXO's moved entirely to surface-mount many years ago.
These
Hi Bob,
Just the sort of things I was wondering and lot's of questions indeed,
that's why I asked, I didn't want to be the guinea pig:-)
Regards
Nigel
GM8PZR
Hi
A few things I would wonder about:
1) Is it 0.1 ppm over 0 to 50C (or some other range)? If not, what is the
The Vanguard ultra precision Golden TCXO, their description not mine:-),
has been listed on Ebay for a while now at various frequencies, and the
0.1 ppm spec caught my eye as a possible replacement for the around 6 or 7
ppm oscillator in a DDS function generator I've been using.
One
I've been trying to locate a manual for the MtronPTI M9101 series GPSDOs,
an M9103 series manual would probably also be ok.
There are references and links online to a PDF manuals section on the
MtronPTI web site but those links just bring up errors and they seem to have
removed everything
I also did a quick write up recently about how I added the 10MHz test point
output to my REF-1.
Hi Daniel
Many thanks for your 10Mhz write up for the REF-1, that's very interesting
and a nice bit of detective work.
Back in January I took a quick look at the underside of a REF-1 board
Hi Adrian,
I've recently ordered two pairs to go with my earlier REF-1 units and found
there was quite a significant saving on postage, even with the original
packaging which I decided was a safer option, but don't forget there's a
very high chance these days that you'll get hit with VAT
Hi Stan,
The CNT90 service manual is available online from Fluke for their PM6690
rebadged version and is identical to the original, a search on "PM6690
Service" will find it.
The manual contains a brief description of the oscillator and a schematic
showing both the standard and ovened
I don't know whether or not this is old news but I've just spotted that
Ulrich's web site is live again.
http://www.ulrich-bangert.de/index.html
Regards
Nigel
GM8PZR
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
An update on this just in case anyone else interested...
I've confirmed that the Symmetricom CDU software for the Proteus GPS unit
will run fine under Windows 7 on a 2009 HP dual-core laptop using a
Prolific USB to RS232 convertor. There is no option to select baud rates etc in
the
Hi Arthur
Thanks for the feedback, that's an interesting find and obviously
something to keep in mind.
As you know Pawel originally designed the prescaler for the CNT85/PM6685,
although in earlier Ebay listings he did comment that it also worked for
the CNT80/PM6680, and taking a look at
Following Nick's comment, under the subject "Z3801A and FE-5680A Allen
Variances", that he briefly considered designing a board to GPS discipline
the FE5680A, I'm pretty sure that a year or so ago just such a board was
suggested as being close enough to completion to warrant a request for
Hi Steve,
I've got one of these, also came to me new in the box but that was around
twelve years ago and other than a short period of testing has stayed there
ever since, nothing wrong with it as far as I can remember just too much
stuff, too much to do, and Thunderbolts and the like do
So much for paranoid file hosting systems with OTT encryption!, the URL
for the photos got truncated in the copying:-(
Just adding "g" to the end of the link in my original post should suffice,
or here, with a bit of luck:-), is the full link...
A couple of years ago, my oh my doesn't time rush by when you're having
fun?:-), I posted a recommendation for 3GHz prescalers from Pawel Witkowski,
an Ebay seller in Poland, for the HP 53131 and 53132 counters.
I'm now very happy to report that Pawel has also produced a similar
prescaler
Spectracom have always seemed a bit "cautious" when it comes to releasing
copies of the Pendulum Counter service manuals, I was sent a copy of the
CNT90/91 manual when carrying out some repairs a few years ago but only after
accepting a non disclosure agreement.
Because of that I was quite
This is a reply to the topic Loran-C reception in the UK with specific
emphasis on the Stanford Research FS700.
Apologies for starting a fresh topic but I'm still not able to take emails
from the list due to incompatibility problems with AOL and I don't see how
to reply to an existing
is that the first unit was incorrectly
marked and none of them have the option 01 oscillator:-)
Regards
Nigel
GM8PZR
In a message dated 11/07/2015 06:45:30 GMT Daylight Time,
p...@phk.freebsd.dk writes:
In message 10c4f9.7d4eacfb.42d19...@aol.com, GandalfG8--- via time-nuts
the exiasting transmitters.
Regards
Nigel
GM8PZR
In a message dated 11/07/2015 07:27:09 GMT Daylight Time, i...@g7iii.net
writes:
On 10/07/15 22:39, GandalfG8--- via time-nuts wrote:
This is a reply to the topic Loran-C reception in the UK with specific
emphasis on the Stanford Research
The FS700 data sheet specifies the standard oscillator to be be an ovenised
oscillator using an AT cut crystal, and the option 01 oscillator to be an
ovenised oscillator using an SC cut crystal.
The SC10 data sheet specifies it to be a 10MHz high stability oscillator
using an SC cut
In a 2005 White Paper singing the praises of "their", actually ex Datum,
8130A rubidium module, Symmetricom mentioned a small RS232 utility they
referred to as 8130Comm.
However, it isn't mentioned in the 8130A manual and I can't find anything
else about it either online or within my own
Hi Graham,
That link isn't fitted here either, and I don't know its intended purpose,
but most of the adjacent component locations aren't populated either so I
suspect that on my unit at least there's a fair chance it's not part of the
active circuitry, although it is difficult to be sure.
Hi Iain
I too received this news, sad day indeed:-(
I've regularly received Lessay ok on the 2100 when Anthorn has been down
so can't say I've ever received a slave, Anthorn, with the master, Lessay
actually out of range but although I've not specifically monitored to check
I've never
I'm currently testing a Motorola M12+T receiver for possible use in a
GPS-disciplined 10MHz oscillator. At the moment, I'm using WinOncore12
version 2.1X3 to communicate with it.
Hi Phil
All versions of WinOncore are pretty old by now, so you might want to try
k.freebsd.dk_
(mailto:p...@phk.freebsd.dk) > wrote:
In message <_576b98.2a1f5672.43bc052e@aol.com_
(mailto:576b98.2a1f5672.43bc0...@aol.com) >, GandalfG8--- via time-nuts writes:
>As of 1725, 4th January, Lessay seems to have been transmitting again for
>at least 30 m
>As of 1725, 4th January, Lessay seems to have been transmitting again
for
>at least 30 minutes, and showing the same or a slightly stronger signal
>here on the west coast of Scotland than Anthorn.
Are you sure it's not UK trying to rig something up for their eLoran trials
?
WB8TSL
On Mon, Jan 4, 2016 at 2:26 PM, GandalfG8--- via time-nuts
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote:
>As of 1725, 4th January, Lessay seems to have been transmitting again
for
>at least 30 minutes, and showing the same or a slightly stronger signal
>h
Yes, they've been switching back and forth between one or two channels all
day, with the one channel state always being just the usual Anthorn Y
channel and the two channels always being Master plus the Y channel.
Sometimes the overall signal levels have been fluctuating quite a bit at
100
> It seems to me that the code they use for the 6731M signal is botched,
> anybody who can confirm ?
Indeed, see the attached plot (from a recording I made earlier this
evening): the master signal is totally lacking the 180 degree phase
code modulation, while the slave signal does have it.
Looks like Sylt went off-air in addition to the Norway and France stations.
Perhaps it is not a permanent decommissioning.
It might just be coincidence, but at around 0145 on Jan 1st the Sylt web
site link on the Loran-C Europe web site was reporting a 404 not found
As far as I can tell, in the 6731 chain there is just one station still
operating, this at 0200 on 1st January 2016.
My FS700s are reporting no master found so Lessay has gone, and I suspect
Soustons also.
Without the master I'm not seeing any identification of the one station I'm
now
> It seems to me that the code they use for the 6731M signal is botched,
> anybody who can confirm ?
Indeed, see the attached plot (from a recording I made earlier this
evening): the master signal is totally lacking the 180 degree phase
code modulation, while the slave signal does have it.
The experiment continues.
Earlier today both the Master and Y channels were showing again, then at
1200 the signal disappeared completely, to be back at 1206 but not long
enough for the FS700 to lock before it went again.
All good fun:-)
Regards
Nigel
GM8PZR
Hi David,
I've only used Loran specific hardware receivers for actual decoding, so
no doubt others will be better able to answer your question re suitable
software, but one thing to watch out for is that the stations don't actually
transmit a named identifier.
With all stations
As of 1725, 4th January, Lessay seems to have been transmitting again for
at least 30 minutes, and showing the same or a slightly stronger signal
here on the west coast of Scotland than Anthorn.
I've never seen this before, Anthorn is much closer and has always been a
stronger signal so
Definitely something unusual going on, overall signal level as monitored on
an SDR is significantly lower than normal and seems to have dropped out
from time to time, and as of approximately 1750 the master signal is no
longer present.
Regards
Nigel
GM8PZR
In a message dated
It seems to me that the code they use for the 6731M signal is botched,
anybody who can confirm ?
Something's certainly not right at the moment.
This morning all was working fine with both Master and Y stations locked on
different receivers, but I had to go out for a few
It seems to me that the code they use for the 6731M signal is botched,
anybody who can confirm ?
Ah well, as of 1915 the FS700s seem to be locking ok again but still with
the monitored signal dropping out from time to time so I guess we just need
to be patient and treat it
Al, Thanks for the good idea, that would certainly have saved me a bit of
work:-), but the switch box inserted in the coax line with the counter input
set to high impedance performs the same function, straight through
connection with the option to switch in a 50 ohm shunt resistor, and it's
Please note that this question refers to the branded "Thunderbolt E"
GPSDO, in a silver coloured case with blue label and using a single 24V
supply,
and not the gold coloured "Thunderbolt" that is often found marked "Rev E".
Whilst testing a Thunderbolt E I've observed that the
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