In message <2867F1FA0E254465AF8CA85C85ED0C79@narvik>, "David J Taylor" writes:
>> In China I've seen down-counting LED displays for the red sign. But this
>> is just to simple for Europe. Badly.
>
>I've certainly seen countdown display for pedestrians in several European
>cities.
They are not u
In Germany hand-used phones during drive are banned for several years
now. I think it makes sense. Well, humanoids should think on it DIY but
the reality is another.
Yes, that does make complete sense, along with anything which may distract
the driver.
In China I've seen down-counting LED di
There is info in the time-nut archives under " Efratom FRS" About June 2009.
http://www.febo.com/pipermail/time-nuts/
Also Didier has the manual at ko4bb.com
John
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Steven L. Finberg
Sen
Hi Steve - I have the whole shelf, called the
Lucent ED2R849-31 Rubidium Frequency Generator Shelf
Manufactured by Efratom for Lucent
The Rb's are FRS-C's by Efratom
Includes:
ED2R849-31 REF FREQ GEN SHELF
e/w - 1 x WP92066 L5 - Rubidium (RB) (I have 2x)
1 x WP92066 L6 (XO) I have none
It
>Rex:
>"Question:
>Has anyone measured or calculated the tuning sensitivity of the pin-5
>EFC voltage? (Hz/V number)."
I'm not sure what HEX number was loaded into my 5680A
but the frequency
was just slightly off from 10Mhz. Pin 5 on my 27M4BI quad opamp 'floats" at
2.599V
I have not but it is sensitive and suspect I actually may have the answer
in my notes.
I was pretty much attempting to range it in to match my operating RB and it
did that quite well. But as I say I suspect I could back out the
sensitivity, maybe.
Regards
Paul
On Sun, Jan 15, 2012 at 8:58 PM, Rex
So then any modern wireless provider setup would have a GPSDO with
probably Rb clock? I assume the crystal based systems are not in favor,
which is why they showed up on the surplus market.
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Steve,
Those were used in the old analog cellular base stations. The DB25 with the
combo RF connector were a real odd ball, hard to find and expensive. Those
units ran off 24 VDC. Sorry, I don't have the pin out but it should be
fairly easy to trace out. They have a FRS Rb in them. Thes
Is it possible these wireless providers are using something like NTP on
steroids with a Rb clock rather than GPSDO?
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and foll
Is this a white box with a heatsink and a pair of BNCs on the front
panel? If so, and it's the same as the one I had, it has an Efratom
FRS in it - I don't know what the external pinout is, but you should
be able to figure it out from the wiring on the oscillator (although I
just removed mine..)
In Germany hand-used phones during drive are banned for several years
now. I think it makes sense. Well, humanoids should think on it DIY but
the reality is another.
In China I've seen down-counting LED displays for the red sign. But this
is just to simple for Europe. Badly.
- Henry
Mark J
All this talk of the $38 RB from China got me to dig out a RB source
I pick up a while ago.
It's a WP 92066-L5 made by Ball Efratem for ATT.
It also has a model sticker on the rear, ATT CC 406801969.
It has a single 25 Pin + coax Mini D type connector on the rear panel.
Anyone know the pin out ?
I have read about the EFC mod for the 5680A by Bill Riches and adapted
for external by Arthur Dent. Nice work.
Maybe I missed a detail in all the recent messages --
Question:
Has anyone measured or calculated the tuning sensitivity of the pin-5
EFC voltage? (Hz/V number)
__
On 01/16/2012 02:13 AM, Tom Harris wrote:
Actually a friend who lived in Rome proposed a new European definition of
the nanosecond as the time between the lights going green and the sound of
the horn of the car behind you. I still remember driving in the rushhour in
Rome, now _that_ was scary.
Actually a friend who lived in Rome proposed a new European definition of
the nanosecond as the time between the lights going green and the sound of
the horn of the car behind you. I still remember driving in the rushhour in
Rome, now _that_ was scary.
On 15 January 2012 14:40, Skip Withrow wrote
On Jan 14, 2012, at 23:12 , Poul-Henning Kamp wrote:
> You are not the first researcher of this interesting phenomena:
>
> http://www.washingtonpost.com/opinions/cellphone-ban-would-be-a-distraction/2011/12/16/gIQAdv2GyO_story.html
Article states: "Upon arriving at a red light, drivers apply th
On 01/16/2012 12:04 AM, b...@lysator.liu.se wrote:
Hi Chris,
One other front end change. I few people have Thunderbolts and it
would be faster to lock the FE5680 to the 10MHz signal then to the
PPS.
Or remove the OCXO from the Thunderbolt and feed the GPS receiver with the
FE5680 10MHz. Eith
On 01/15/2012 11:34 PM, Chris Albertson wrote:
On Sun, Jan 15, 2012 at 7:45 AM, Magnus Danielson
wrote:
A short notice on embedded CPU/MPUs into FPGAs. Using PIC or AVR might be
tempting, but I consider any clone "dirty" from a rights perspective, MIPS
for instance have been very protective o
Hi Chris,
> One other front end change. I few people have Thunderbolts and it
> would be faster to lock the FE5680 to the 10MHz signal then to the
> PPS.
Or remove the OCXO from the Thunderbolt and feed the GPS receiver with the
FE5680 10MHz. Either modify the FE5680 for EFC och program a uC to
Why do it easy when you can do it difficult. With my Lab setup the
frequency out of the Tbolt changes once in a while to correct the 1 PPS. That
is
how I explain what I se on my Tracor 527E. Maybe I am wrong.
Bert
In a message dated 1/15/2012 5:12:18 P.M. Eastern Standard Time,
albertson
On Sun, Jan 15, 2012 at 7:45 AM, Magnus Danielson
wrote:
> A short notice on embedded CPU/MPUs into FPGAs. Using PIC or AVR might be
> tempting, but I consider any clone "dirty" from a rights perspective, MIPS
> for instance have been very protective on their side, so has ARM. So far has
> the SP
On Sun, Jan 15, 2012 at 10:32 AM, Hal Murray wrote:
>
>
> You can get USB cable extenders. They are 15 feet long with a hub built into
> the connector blob at the far end. There is a limit of 4 or 5. They
> obviously reduce the power available to the end device.
--
May have solved this proble
We are talking about a controller for the new batch of $38 FE5680
units right? Unless you modify these the frequency must be
controlled by RS232.
Then you said FPGA right?If so why worry about the bits in the
counter. You can change it later with a few minutes effort. If you
have 250,000
The MAX3000A and the PIC can be bought any place in the EU.
Bert Kehren
In a message dated 1/15/2012 2:09:24 P.M. Eastern Standard Time,
xne...@luna.kyed.com writes:
On Sun, 15 Jan 2012 16:45:56 +0100, Magnus Danielson wrote:
> I could also roll my own CPU, as I have already done before,
One 14 pin uP along with a MAX3000A will do it hands down.
Bert
In a message dated 1/15/2012 2:43:54 P.M. Eastern Standard Time,
davidwh...@gmail.com writes:
I would just use a PIC, AVR, or ARM even if I had to use more than one
with some discrete logic on the side but I like solder, assem
I would just use a PIC, AVR, or ARM even if I had to use more than one
with some discrete logic on the side but I like solder, assembly, and
low level coding in that order. If I find a small, cheap, easy to
use, and general purpose FPGA, I may look into that as well.
MIPS may be a special case fo
Arthur,
Nice pixs well lit with good detail. If only I had spent some time digging
around that would have been much easier to solder to. May change it the
next time I am in the unit.
I do agree that the reg was running pretty hard but you attached it to at
least a 115 degree heat sink. (At least in
On Sun, 15 Jan 2012 16:45:56 +0100, Magnus Danielson wrote:
> I could also roll my own CPU, as I have already done before, but
> building a tool-chain including GCC is a bit of home-work. For my
> application I haven't bothered, but it is tempting to get C
> capabilities.
>
How about the new Zy
I recommend bluetooth
Bert Kehren
In a message dated 1/15/2012 1:32:37 P.M. Eastern Standard Time,
hmur...@megapathdsl.net writes:
albertson.ch...@gmail.com said:
> So I want to be able to connect a desktop computer and a USB cable is to
> short.
You can get USB cable extenders. They ar
albertson.ch...@gmail.com said:
> So I want to be able to connect a desktop computer and a USB cable is to
> short.
You can get USB cable extenders. They are 15 feet long with a hub built into
the connector blob at the far end. There is a limit of 4 or 5. They
obviously reduce the power avai
>paul swed:
>"Hardest part is attaching the 100K resistor to the ic. Boy thats small."
I didn't solder the resistor directly to pin 5 of the IC. I found that pin 5
was connected to a nearby SMD capacitor that was a little easier to
solder to. Attached is a photo of the correct location if you want
Thank you Paul.
By the way the GA programmer cost $ 10 and the software is free and
relatively easy to use. Has most TTL functions in its library!
Bert Kehren
In a message dated 1/15/2012 11:27:50 A.M. Eastern Standard Time,
paulsw...@gmail.com writes:
I have been watching for a bit now.
I have been watching for a bit now. Its more interesting now that my
FE5680s working quite well. I have noticed on numbers of threads the
conversation dramatically shifts from reasonably implemented low cost
solutions to the ultimate FPGA.
FPGAs are generally intended for the mass market with a ste
Magnus I agree,
I can not se how any one can simplify this approach. A $2 gate array in a
0.5 $ socket that is solderable, a $ 2 14 pin DIP uP what ever brand, a
clock generator, a RS232 interface, a 3.3 V regulator and two single gate 14's
what more do you want. If communication is limite
On 01/15/2012 05:48 AM, Chris Albertson wrote:
On Sat, Jan 14, 2012 at 4:32 AM, wrote:
I have no expertise when it comes to filter design or programming PIC's or
other micro controllers. But I know what works for me. For 11 years I have
been using Shera controllers with very good results. (I s
I am staying out of that discussion due to lack of knowledge, My question
is wether the input circuit is acceptable or if some one has a different
solution. We have integrated the Shera input including the interrupt counter
on the chip, so there are only three interface pins, interrupt, data
Moin!
On Sun, 15 Jan 2012 00:56:05 +
"gonzo ." wrote:
> On the schematic the inputs are listed as "supply" (ie. "+15V_SUPPLY" and
> "+5V_SUPPLY"), where as the outputs of the regs are marked with their actual
> voltages.
> The boards silk screen on the other hand lists the inputs as 7V and
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