Hello Peter,
that's a good question. Some users of our Fury use rented/borrowed survey
equipment (Leica, Javad, etc) to get a very precise position of their antenna,
or they call in a surveyor.
It is also possible to let the receiver do the auto survey multiple times,
preferably during di
Joe Gwinn skrev:
> At 4:59 AM + 1/7/09, time-nuts-requ...@febo.com wrote:
>> Message: 6
>> Date: Tue, 06 Jan 2009 21:54:41 -0600
>> From: Brian Kirby
>> Subject: Re: [time-nuts] Standards sought for immunity of shielded
>> cable links to power-frequency ground loops
>> To: Discussion of p
I recently uploaded a manual for the 10638A Degausser to KO4BB's website. I
checked this AM and it is available for download.
Joe
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http://dkc3.digikey.com/PDF/T091/P0529.pdf
When I look at the catalogue, the description says:
> | UTC Receiver Module, 60kHz, no CPU | 561-1014-ND | 10.70 | CMMR-6P-60 |
I have looked at modules like this before but what I saw was much more
expensive. So I'd like to get one at < $11.00. H
Magnus wrote:
> Isolational transformers (basically 1:1 transformers, preferably
> double-shielded, where each shield is hooked to the respective cable shield
> side)
> is usually preferred in this context. It can be effective to connect the
>grounds on both sides to see if it causes the probl
James R. Gorr wrote:
> http://dkc3.digikey.com/PDF/T091/P0529.pdf
>
>
> When I look at the catalogue, the description says:
>
>> | UTC Receiver Module, 60kHz, no CPU | 561-1014-ND | 10.70 | CMMR-6P-60 |
>
> I have looked at modules like this before but what I saw was much more
> expensive. S
On Wed, Jan 07, 2009 at 08:52:23AM -0600, David M. Witten II wrote:
> No, I haven't had time to make one work. It seems like a nice little
> package, but how useful and for what purposes I am not yet certain. My
> curiosity just got the better of me (again). The device produces a
> pulse trai
Marc Bury skrev:
>
> Magnus wrote:
>> Isolational transformers (basically 1:1 transformers, preferably
>> double-shielded, where each shield is hooked to the respective cable shield
>> side)
>> is usually preferred in this context. It can be effective to connect the
>> grounds on both sides to
On Wed, Jan 7, 2009 at 6:52 AM, David M. Witten II wrote:
> James R. Gorr wrote:
>> Have you been able to RX WWVB with it (even if you haven't written anything
>> to decode it)?
>
> No, I haven't had time to make one work. It seems like a nice little
> package, but how useful and for what purpos
> I would like to know what others might do with this thing.
One thing you can do is connect it to a PC via a modem control signal.
There is software at:
http://www.buzzard.me.uk/jonathan/radioclock.html
A lot of the text is for a different hardware module but there is lots of
info. In partic
Hello Peter,
I would think it's related to 1ns per foot, but depends highly on Sat
geometry at any given time. I remember talking about this some years ago on
time
nuts, and someone mentioned it wasn't exactly 1ns/foot, but slightly less (if I
remember correctly).
Yes, the cable delay i
Hi Jamie:
The same company makes a number of LF time code receiving products. Their
top of the line model combines a ferrite loop antenna, made to have very
specific properties, with a three band receiver that resonates the antenna
at either 40, 60 or 77.5 kHz by switching caps. The included CPU
tvb , When will you have your triphoton time base up and running ?
( sciencedaily.com today )
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I recently acquired a couple of FTS 4100/S12 cesium frequency standard
modules. These are, I've been told, basically the guts of a 4050 (and
maybe 4060?) commercial standard repackaged for military "fly-away" use.
They run from 22-30 volts and have a couple of switches and a meter
jack, but
Joseph,
Joseph M Gwinn skrev:
> Magnus,
>
> time-nuts-boun...@febo.com wrote on 01/07/2009 01:27:52 AM:
>
>> Joseph M Gwinn skrev:
>>> First the background:
>>>
>>> In some timing distribution applications, the primary source of
>>> interference comes from different ground voltages in differen
In message , Joseph M Gwinn writes:
>The effect of differing ground potentials on a shielded cable is to pull a
>large current through the shield, [...]
The correct enginering solution is to use twinax, ground the shield
in one end only and transformer-couple the signal at least in the
other end
Magnus,
time-nuts-boun...@febo.com wrote on 01/07/2009 01:27:52 AM:
> Joseph M Gwinn skrev:
> > First the background:
> >
> > In some timing distribution applications, the primary source of
> > interference comes from different ground voltages in different parts
of
> > the facility, such as
I have not following all of discussions for a while, so perhaps I
missed out on some of this. What do people suggest for a power supply
and from where? The harder request is for an indoor antenna probable
placed up against the window. Reliable dealers or stores would be very
helpful.
Poul-Henning,
time-nuts-boun...@febo.com wrote on 01/07/2009 04:25:04 PM:
> In message 00090...@mck.us.ra
> y.com>, Joseph M Gwinn writes:
>
> >The effect of differing ground potentials on a shielded cable is to
pull a
> >large current through the shield, [...]
>
> The correct enginering so
In message , Joseph M Gwinn writes:
>Could be a differential TX and RX. I recall that they send a RS422 signal.
Depending on the speed, RS422 works fine with transformers.
>I imagine that the shield is grounded at both ends, if only for
>safety reasons.
That is actually a very unsafe practice,
Hello Peter,
we've got a number of different units running various tests in our lab right
now, and they all can be tracked on the following site:
_http://www.jackson-labs.com/images/gpsstat.htm_
(http://www.jackson-labs.com/images/gpsstat.htm)
The units will flip-through the website ev
Poul-Henning,
time-nuts-boun...@febo.com wrote on 01/07/2009 05:56:19 PM:
> In message 007cc...@mck.us.ra
> y.com>, Joseph M Gwinn writes:
>
> >Could be a differential TX and RX. I recall that they send a RS422
signal.
>
> Depending on the speed, RS422 works fine with transformers.
Yes. I
Poul-Henning Kamp skrev:
> In message
> y.com>, Joseph M Gwinn writes:
>
>> Could be a differential TX and RX. I recall that they send a RS422 signal.
>
> Depending on the speed, RS422 works fine with transformers.
You want a DC balanced encoding if you send data down the line,
otherwise you
Joseph,
>>> Could be a differential TX and RX. I recall that they send a RS422
> signal.
>> Depending on the speed, RS422 works fine with transformers.
>
> Yes. It would be 10 MHz or 20 MHz, depending on coding. Or 5 MHz, so the
> transitions are at 10 MHz. I don't recall, or never knew.
R
On Jan 7, 2009, at 2:43 PM, time-nuts-requ...@febo.com wrote:
>
> Message: 6
> Date: Wed, 7 Jan 2009 17:08:22 -0500
> From: "Ronald Held"
> Subject: [time-nuts] TB PS/Antenna recommendations
> To: time-nuts@febo.com
> Message-ID:
> <9a86fb0e0901071408r4a205518mc346d7694f9af...@mail.gmail.co
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