Lady Heather has a display option (G L) for blanking out the location
display... no need to mess with Photoshop...
Ok, my *assumption* is that the location data has been Photoshopped. Normally
that
is not worth commenting on. It’s something that a lot of people do.
-nuts] Tuning a Trimble Thunderbolt
Hi
Looking at that screen shot, something is *very* wrong with your GPS
reception. Your GPS
is 10X worse than it should be.
On Apr 22, 2015, at 9:37 AM, Pete Stephenson p...@heypete.com wrote:
On Wed, Apr 22, 2015 at 1:47 PM, Bob Camp kb...@n1k.org
On Thu, Apr 23, 2015 at 12:33 AM, Bob Camp kb...@n1k.org wrote:
Hi
Looking at that screen shot, something is *very* wrong with your GPS
reception. Your GPS
is 10X worse than it should be.
You're right. The interference from the nearby Oncore UT+ seems to
have been the problem. Since I moved
On Thu, Apr 23, 2015 at 3:16 AM, Arthur Dent golgarfrinc...@gmail.com wrote:
wb6bnq wrote:
“I am a little confused. In your screen shot the overdetermined clock
says you are at precisely 46.00 North by 7.0 East at 547
Meters.”
I think I have the answer. I know when I was selling
Bob from the screenshot what is it that shows the GPS reception as very wrong.
just curious.
-=Bryan=-
From: kb...@n1k.org
Date: Wed, 22 Apr 2015 18:33:09 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] Tuning a Trimble Thunderbolt
Hi
Looking at that screen shot, something
On Tue, Apr 21, 2015 at 1:23 PM, Bob Camp kb...@n1k.org wrote:
Hi
inevitably on these devices, there is a marketing brochure that hits the high
points
in the specification. That information is public and intended to get “buzz”
going on
the product. Once an OEM gets serious about the
A week is somewhat optimistic since the thunderbolt consumes around 1.68
kilowatt hours of energy. With a 12V battery a capacity of around 84 ampere
hours (for an efficiency of 100%) which is somewhat larger than that provided
for most UPS particularly those sold for use with personal
Hi
Backing up a bit to “getting a TBolt running”.
1) instal Lady Heather and get it connected to the TBolt
2) does it fire up and find any sats?
3) are the power supplies holding regulation?
4) nail down the antenna in the best fixed location you can find
5) run the auto-calibration feature in
On Wed, Apr 22, 2015 at 1:47 PM, Bob Camp kb...@n1k.org wrote:
Hi
Backing up a bit to “getting a TBolt running”.
1) instal Lady Heather and get it connected to the TBolt
2) does it fire up and find any sats?
Yes. It had been working consistently for several days prior to my
first message.
On Tue, Apr 21, 2015 at 1:30 AM, Pete Stephenson p...@heypete.com wrote:
On Tue, Apr 21, 2015 at 4:25 AM, Charles Steinmetz
Indeed. I'm running a 48-hour survey with Lady Heather now to see if
that can improve things a bit more.
You can let the GPS receiver do a self-survey but you can also
On a Thunderbolt, you can only manually enter your position with using
single-precision floating point numbers... not really accurate enough for a
time-nut. When Lady Heather does a precision survey, it stores the
high-prescision results of the 48-hour survey by doing repeated single-point
Hi Pete,
I am a little confused. In your screen shot the overdetermined clock
says you are at precisely 46.00 North by 7.0 East at 547
Meters. However, Google Earth shows that location at over 10 thousnad
feet (3100 meters) elevation in a remote part of the Switzerland
mountains.
A couple of thinks to note:
Before running the auto-calibration feature, first set the antenna elevation
mask angle to a low value and let it run for a few (say 12) hours. This will
collect data on the received signal strength vs satellite elevation angle. The
auto-calibration routine sets
Hi
Looking at that screen shot, something is *very* wrong with your GPS reception.
Your GPS
is 10X worse than it should be.
On Apr 22, 2015, at 9:37 AM, Pete Stephenson p...@heypete.com wrote:
On Wed, Apr 22, 2015 at 1:47 PM, Bob Camp kb...@n1k.org wrote:
Hi
Backing up a bit to
wb6bnq wrote:
“I am a little confused. In your screen shot the overdetermined clock
says you are at precisely 46.00 North by 7.0 East at 547
Meters.”
I think I have the answer. I know when I was selling Tbolts I would
PhotoShop out every digit after the decimal point so the displayed
Pete wrote:
It'd be nice if there was some way to keep the crystal going
through power interruptions, even if the oven itself cooled off. I
suspect Trimble (correctly) assumed that the vast majority of these
units were to be installed in cell sites with reliable power so that
wouldn't be an
On Tue, Apr 21, 2015 at 12:08 AM, Bob Camp kb...@n1k.org wrote:
Hi
Expecting that unit to meet holdover after only being locked for 12 hours is
not
a reasonable thing.
So it would seem.
Perhaps I was being a bit optimistic for out-of-the-box performance:
the brochure listed the holdover
Hi
inevitably on these devices, there is a marketing brochure that hits the high
points
in the specification. That information is public and intended to get “buzz”
going on
the product. Once an OEM gets serious about the product, (the TBolt is targeted
at OEM’s) a detailed specification gets
On Tue, Apr 21, 2015 at 4:25 AM, Charles Steinmetz
csteinm...@yandex.com wrote:
Pete wrote:
On a related note, is it possible to extract any data regarding the
training from the unit?
Not as far as the time-nuts community knows, no (other than looking at the
DAC voltage and temperature
On Mon, Apr 20, 2015 at 8:48 PM, Charles Steinmetz
csteinm...@yandex.com wrote:
Pete wrote:
when using the default
parameters it doesn't meet the holdover specifications of +/- 1 us
over 2 hours with a maximum of +/- 15C temperature change: it will
drift at least 20 us over 2 hours in
Hi
Expecting that unit to meet holdover after only being locked for 12 hours is
not
a reasonable thing.
Let it run for a week. Let it lock up for at least 4 or 5 days and get a good
survey
on the location. It should run +/- 5ns one sigma with a good survey.
Bob
On Apr 20, 2015, at 5:39
Hi
If you have a less than optimum antenna location, that will impact how fast you
can do
a good survey. The worse your survey location, the poorer your time accuracy.
The worse
the time accuracy, the longer it will take to converge on a frequency.
A “normal” test environment for this sort
On 4/20/15 7:25 PM, Charles Steinmetz wrote:
Unfortunately, you are unlikely to do any better than this with the
antenna location you described. Time to buy a house, with no tall trees
nearby. (You may already have heard that time-nuttiness can be
expensive ;-)
Actually, what you
Pete wrote:
On a related note, is it possible to extract any data regarding the
training from the unit?
Not as far as the time-nuts community knows, no (other than looking
at the DAC voltage and temperature reporting during holdover and
attempting to reverse engineer the prediction
Hi all,
I recently acquired a 2004-era Trimble Thunderbolt with firmware 3.00
from eBay. It looks essentially identical to the one sold in the
TAPR/Time Nuts 2009 group buy[1]. A sticker says it's the Rev E
(it's not a Thunderbolt E, just revision E of the original
Thunderbolt).
I don't use it
Pete wrote:
when using the default
parameters it doesn't meet the holdover specifications of +/- 1 us
over 2 hours with a maximum of +/- 15C temperature change: it will
drift at least 20 us over 2 hours in holdover.
Executive summary -- you are expecting way too much, way too soon.
2. Is it
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