I'm new to the list. Having said that, I ran across a webpage from a chap in
Australia or maybe it was New Zealand. In any event he claims that the Rb lamp
can be brought back to life. He says that he has rejuvenated over 30 units with
bad lamps and they work great after his "process."
I will
> I was told by a Technical Support Engineer from Symmetricom Global
> Services that "The typical life span is ~10 years for these Rubidium
> Time Bases".
> This is in response to my request for information on a Ball/Efratom
> PTB-100.
> Is this a typical life span of a rubidium standard?
It's
Bob Camp wrote:
HI
I have no direct experience with the Minicircuits "active mixers", but I
have used some of their amplifier chips. I suspect they use their own amps.
Or at least the same amps.
The amps I worked with had significant phase noise issues when driven
within 6db of their 1db co
I was told by a Technical Support Engineer from Symmetricom Global
Services that
"The typical life span is ~10 years for these Rubidium Time Bases".
This is in response to my request for information on a Ball/Efratom PTB-100.
Is this a typical life span of a rubidium standard?
Do some standard
HI
I have no direct experience with the Minicircuits "active mixers", but
I have used some of their amplifier chips. I suspect they use their
own amps.
The amps I worked with had significant phase noise issues when driven
within 6db of their 1db compression point. They were "ok" at low
Bruce Griffiths wrote:
Hej Magnus
To confuse matters Minicircuits use the term active mixer for a
conventional diode mixer that uses amplifiers on the LO and/or RF ports
to boost signal levels.
While it confuses matters, it is usefull to know about them, since they
may be good for some desi
Have you tried Dimension 4 Time? See http://www.thinkman.com/dimension4/.
Free download for private use.
Have used it on XP and Vista machines OK. Don't know about Windoze 7 though.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] O
Magnus Danielson wrote:
Bruce Griffiths wrote:
Magnus Danielson wrote:
Bruce Griffiths wrote:
Active mixers almost invariably have a higher noise floor than
passive mixers, particularly in the flicker noise region.
Consequently a DMTD system using active mixers will have a higher
system noise
Bruce Griffiths wrote:
Magnus Danielson wrote:
Bruce Griffiths wrote:
Active mixers almost invariably have a higher noise floor than
passive mixers, particularly in the flicker noise region.
Consequently a DMTD system using active mixers will have a higher
system noise floor than one using act
Magnus Danielson wrote:
Bruce Griffiths wrote:
Active mixers almost invariably have a higher noise floor than
passive mixers, particularly in the flicker noise region.
Consequently a DMTD system using active mixers will have a higher
system noise floor than one using active mixers.
... than o
Or just use NTP for Windows - available for free at
http://www.meinberg.de/english/sw/ntp.htm.
Use it in conjunction with their excellent NTP Monitor program
http://www.meinberg.de/english/sw/time-server-monitor.htm
Works a treat on any Windows machine.
Rob Kimberley
-Original Message-
Bruce Griffiths wrote:
Active mixers almost invariably have a higher noise floor than passive
mixers, particularly in the flicker noise region.
Consequently a DMTD system using active mixers will have a higher system
noise floor than one using active mixers.
... than one using passive mixers.
Mario Sanchez wrote:
Hi all,
I am starting building a DMTD, and for simplicity reasons I started with
active mixers...
What are the advantages/disadvantages of using passive mixers instead?
Someone has had the experience to compare them?
As LO, I am using a Synthesizer whose amplitude is a
Hi Alan, I hope so. Peter Vince is coming.
Rob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Alan Melia
Sent: 11 November 2009 20:10
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran C shutdown
Hi Rob I'm not sure yet but may see you there
Alan Melia (G3NYK)
- Original Message -
From: "Rob Kimberley"
To: ; "'Discussion of precise time and frequency
measurement'"
Sent: Wednesday, November 11, 2009 9:41 AM
Subject: Re: [time-nuts] Loran C shutdown
> Not practical. You need gro
Hi:
As the distance between the transmitter and receiver increases so does the
jitter in the received signal. You can see that in the data on the NIST page
where they monitor different stations from Colorado. The greater the distance
the poorer the time recovered.
Have Fun,
Brooke Clarke
> Not practical. You need ground wave reception of LORAN for accurate
> navigation. At long distances you would be reliant on sky wave.
Roy,
OK, but my interest is NOT navigation, but as a standard of time interval.
It would still be useful, even if the path length drifted between day and
night a
Hyperbolic, not parabolic.
-John
> Someone may correct me on this.
>
> But isn't Loran a parabolic navigation system? So, the further away
> from the chain of transmitters you are, the positioning "quality" (for
> want of a better word) will deteriorate. I seem to remember reading
>
Hi all,
I am starting building a DMTD, and for simplicity reasons I started with
active mixers...
What are the advantages/disadvantages of using passive mixers instead?
Someone has had the experience to compare them?
As LO, I am using a Synthesizer whose amplitude is approx 500mVpp, and the
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Antonio,
I ran into that last night.
So much for an easy test.
On Tue, Nov 10, 2009 at 10:57 PM, wrote:
> The problem with the some European chains is that they have four-digit
> GRPs . Therefore, the standard 2000C and maybe others are useless.
>
> Regards,
> Antonio
> CT1TE
>
>
> Quoting p
Someone may correct me on this.
But isn't Loran a parabolic navigation system? So, the further away
from the chain of transmitters you are, the positioning "quality" (for
want of a better word) will deteriorate. I seem to remember reading
that you need a good spread of directions for the inco
Hi,
Does anyone on the list use SocketWatch to keep their computer's clock
roughly up to snuff time-wise? With me having switched to Vista (and
lately W7), it often can't make the necessary network connection and
gives me 'access denied' messages. The strange thing is that it will
work fine from a
Not practical. You need ground wave reception of LORAN for accurate
navigation. At long distances you would be reliant on sky wave.
I'm going to an NPL Timing meeting in early December being held at Trinity
House in London. I'll get the low down on what is happening over here on
LORAN in light of
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