Magnus,
We've made this measurement using a 20 ps time interval counter and a GPS
disciplined Rubidium frequency standard as the time base; making many
concurrent measurements with no dead time between. The resultant measurement
was very close to the 1 ns/ft benchmark with RG-59 (BNC connector
z...@dakotacom.net said:
> 4. Does anyone know a way to force the 5335A counter to display
> another decimal place in frequency measurements? I am getting to
> 0.001 Hz by using the "mean of 100 counts" function on the counter,
> but I think the counter has at least one more digit available whic
Bruce,
> In searching on-line for ways to construct a 10 MHz to 100
> MHz multiplier,
The circuit that you need depends a lot on what jitter is allowed for the
100 MHz signal. If your requirements are not too tight a single ICS503 clock
multiplier ic will do. However it has a typical output ji
mag...@rubidium.dyndns.org said:
> This sounds fast. The normal taxiometer is at 66% of speed of ligth in
> vaccum, which for 1 ns is about 3 dm so for the RG-59 that would be
> about 2 dm.
> Some cables reach 78%, but RG-58 and RG-59 is down at normal 66%.
Sounds right.
My rule to thumb for
>
> Nope, not ready to run away by any means, John! And I do thank you
> much for your time in these helpful comments. Thanks also to Tom for
> that somewhat different scope method. I was indeed wondering about
> that short-term stability issue when making quick "point-in-time"
> frequency mea
Run away while you still can? :-P
-- john, KE5FX
Nope, not ready to run away by any means, John! And I do thank you
much for your time in these helpful comments. Thanks also to Tom for
that somewhat different scope method. I was indeed wondering about
that short-term stability issue whe
IE-11 is probably more current notation than using 10E-11 for 1 part in
1 hundred thousand million.
However this is only to be expected from oder application notes and papers.
Tom Duckworth wrote:
Warren- No, a 100% error would be 40 GHz. Where did you get 40.4 GHz?
That would be 101% and of co
Tom Duckworth wrote:
Jim,
We use a benchmark 1 ns per foot of coax (RG-59).
This sounds fast. The normal taxiometer is at 66% of speed of ligth in
vaccum, which for 1 ns is about 3 dm so for the RG-59 that would be
about 2 dm.
Some cables reach 78%, but RG-58 and RG-59 is down at normal 66
In searching on-line for ways to construct a 10 MHz to 100 MHz multiplier,
I came across an interesting product offered by Silicon Forest Solutions
_http://www.TenMHz.com_ (http://www.TenMHz.com) . Their LPRO-GPSDO
incorporates a refurbished LPRO rubidium oscillator, disciplined by a GPS
r
Jim,
We use a benchmark 1 ns per foot of coax (RG-59).
You could measure the delay by using a resistive splitter (50 ohms) and two
cables (say a 2 foot and a three foot, each terminated at the far end with a
50 ohm pass through terminator). Drive the splitter with your 10 MHz signal
and measu
Tom Duckworth said the following on 01/05/2010 09:10 PM:
Warren- No, a 100% error would be 40 GHz. Where did you get 40.4 GHz?
That would be 101% and of course 80 GHz is 200%.
Bruce- Of course you are right about the + symbol for 40.000 000 003 GHz
(+7.5 parts in 1E-11) but what would you cons
Warren- No, a 100% error would be 40 GHz. Where did you get 40.4 GHz? That
would be 101% and of course 80 GHz is 200%.
Bruce- Of course you are right about the + symbol for 40.000 000 003 GHz
(+7.5 parts in 1E-11) but what would you consider current standard notation.
We still Use this metric
> 1. Can someone tell me the meaning and significance of the "Timing
> Outputs" numbers in the lower left corner of the TBolt monitor
> window? (Mine right now is showing plus 3.75 ns and plus 0.01 ppb).
> The TBolt manual does not describe these, although on one page it
> lists them as "estimat
One word:
Vodka
-John
===
> Poul-Henning Kamp wrote:
>> Not entirely unrelated to Loran-C:
>>
>> http://www.jan-mayen.no/nyhet/2009/12_desember/desember-09.htm
>>
>> Look at the entry for december 23rd.
>>
>
> Looks like they have alot of humour and good mood in general. Their
> ba
I have two Z3816A but some days ago I deleted the firmware of one of these.
Does someone know if is possible to found the firmware?
I was working with satstat and with a wrong command I erased the EPROM.
Can someone help me?
Thanks.
Luciano
___
time-n
Interesting
So a 100% error (1e2) would then be 40.4GHz and not 80GHz
Sounds like some new math the cost of living department came up with.
ws
**
Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Jan 5 20:25:05 UTC 2010
One should of course be aware that the number notation used is
And, do I see a picture of something looking much like the dreaded Wouff
Houng?
Don AJ7LL
Magnus Danielson
> Poul-Henning Kamp wrote:
>> Not entirely unrelated to Loran-C:
>>
>> http://www.jan-mayen.no/nyhet/2009/12_desember/desember-09.htm
>>
>> Look at the entry for december 23rd.
>>
>
> Loo
One should of course be aware that the number notation used is no longer
considered correct.
Also even after correcting for the non standard notation the last set of
numbers is incorrect:
eg
40.000 000 003 GHz is equivalent to an error of +7.5 parts in 1E11 not
7.5 parts in 1E-11.
Bruce
Poul-Henning Kamp wrote:
Not entirely unrelated to Loran-C:
http://www.jan-mayen.no/nyhet/2009/12_desember/desember-09.htm
Look at the entry for december 23rd.
Looks like they have alot of humour and good mood in general. Their
bathing-weather leaves a little to desire... -0,4 C in the wate
There is a LORAN-C transmitter on Jan Mayen. See the picture of the
miniature one on Dec 23rd.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Richard W. Solomon
Sent: 05 January 2010 7:11 PM
To: Discussion of precise tim
I am new to the list (although lurking now a while) and also new to
the more precise species of frequency and time measurement. I have
recently powered up an LPro and a Thunderbolt, both of which appear
to be working by the book. Connecting the TBolt to my scope external
sync and the LPro as
Sorry, but I am not conversant in that language !!
73, Dick, W1KSZ
-Original Message-
>From: Poul-Henning Kamp
>Sent: Jan 5, 2010 1:23 PM
>To: Discussion of precise time and frequency measurement
>Subject: Re: [time-nuts] Loran C D-Day
>
>
>Not entirely unrelated to Loran-C:
>
>http://
Not entirely unrelated to Loran-C:
http://www.jan-mayen.no/nyhet/2009/12_desember/desember-09.htm
Look at the entry for december 23rd.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never
Dear Brian,
I do mot manage to send you a mail with an attachment to
kilodelta4foxm...@gmail.com and neither to kirb...@bellsouth.net. Have you
another address for me?
73s and my best regards
Ulrich Bangert
www.ulrich-bangert.de
Ortholzer Weg 1
27243 Gross Ippener
I have recently discovered that SparkFun do a USB Weather Board, which
has sensors for temperature, pressure, humidity, and light. see:
http://www.sparkfun.com/commerce/product_info.php?products_id=8311
Priced at $124.95, I have ordered one already (pity I didn't know
about the discount
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