AOPA
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Eric Garner
Sent: Monday, November 16, 2009 10:44 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran C shutdown
Does anyone know if there is
Nice looking, no mods.
$115 plus shipping from 75044.
Thank you!
Francesco Ledda
Garland, Texas
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Magnus Danielson
Sent: Sunday, November 15, 2009 9:01 AM
To: Discussion of precise time
The bottom line is simple: the military don't need it, the FAA see no value
in it; the avionics industry has discontinued the manufacturing of LORAN
receivers years ago, the General Aviation community has bigger fish to fry
(fight user fees); the Europen talked in the past about using LORAN for
Considering that the GPS antenna in aircrafts is mounted on top of fuselage,
and that its radiation pattern is upward, it seems that a ground jammer will
have an uphill battle.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of J. Forster
(was Re: Reference oscillator
accuracy)
Francesco Ledda wrote:
Considering that the GPS antenna in aircrafts is mounted on top of
fuselage,
and that its radiation pattern is upward, it seems that a ground jammer
will
have an uphill battle.
Not all GPS receivers is sitting on flying airplanes. Far
AOPA is pushing congress to repristinate funding for LORAN. General
aviation is probably the heaviest user on this Nav system. The
aviation user community would love to see Nav systems with integrated
LORAN and GPS capabilty, but the industry has done little in this
area, due to lack of
LORAN is a good back up, but it has problems and limitations. Navigating
next to a storm can overwhelm the receiver and make it unusable. The LORAN
system doesn't have a build in accuracy degradation system like GPS(RAIM -
receiver autonomous integrity monitoring), and this make LORAN unfit to
I bought from Naptech a very clean HP8566B for $2200. I am very happy with
it.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of John Miles
Sent: Friday, October 30, 2009 11:06 PM
To: Discussion of precise time and frequency measurement
Fos sale:
Austron Model 1295D Series Distribution Chassis
Includes:
AC/DC Power Supply
Qt1 - Low Loise Wideband Module
Qt 3 - Quad W/B Output
Manual
Unit looks new, but it is untested.
Price $250 plus shipping from 75044
Thanks,
Francesco Ledda
E-mail message checked by Spyware Doctor
In the US, we use both systems. During engineering school, we mainly used
the exponent system as done in Europe; we also used the US system for
historycal and practical reasons.
Some people here in the US feel more confortable one system and others with
the other. My opinion is that as long as
The only portion of the device with possibly significant variability is the
VCO. If the design does not take care of the VCO variability, for the
capture range of the PLL; things may not work.
If the device had a Phase-Frequency detector, instead of a phase detector,
the capture range would not
Hi,
Where can I download the source code?
Thank you!
E-mail message checked by Spyware Doctor (6.1.0.447)
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Sorry, it is a 5373A!It is not mine.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Francesco Ledda
Sent: Wednesday, September 09, 2009 10:50 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] HP 8753A
You need to replace the internal battery (3.6) and calibrate the inputs; the
procedure is simple.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Norman J McSweyn
Sent: Friday, September 04, 2009 8:16 AM
To: Discussion of precise time
,
I saw in the troubleshooting section that a weak internal battery could
be the cause.
HA!!! Just found the procedure in the manual!!
Looks deceptively easy.
Thanks,
Norm n3ykf
Francesco Ledda wrote:
You need to replace the internal battery (3.6) and calibrate the inputs;
the
procedure
you could use remote desktop
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of brucekar...@aol.com
Sent: Friday, July 03, 2009 8:50 AM
To: time-nuts@febo.com
Subject: [time-nuts] Wireless Adapter for an TBolt
Has anyone coupled a
I believe you. You know that its is better to be lucky than smart ;)
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Mark Sims
Sent: Sunday, June 21, 2009 11:22 AM
To: time-nuts@febo.com
Subject: [time-nuts] Bad capacitors (was
Lucky me, I bought an HP3455A new still in the box for $300!
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Mark Sims
Sent: Saturday, June 20, 2009 5:05 PM
To: time-nuts@febo.com
Subject: [time-nuts] Volt-nuts cooperation?
The 3458A
: Re: [time-nuts] Z3805 initial behaviour after power up revised
Francesco Ledda wrote:
Aging cannot be predicted! If it could be predicetd, there would be no
aging.
Not entierly true. Even with a perfectly known aging, only a few
oscillators would bother to estimate and correct it. This can
Aging cannot be predicted! If it could be predicetd, there would be no
aging.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Ulrich Bangert
Sent: Thursday, June 18, 2009 3:04 AM
To: 'Discussion of precise time and frequency
A third order PPL has better sideband suppression. The tracking capability
depends upon the phase range of the phase detector. If 1:1 phase comparison
and a XOR phase detector is used, the range is 180 degrees. Dividers on the
feedback portion of the PLL increase the phase range of the phase
try
http://www.mkdw.net/pub/radio/hp/Manuals/?C=N;O=D
The manual is 05372-90016.pdf
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of gandal...@aol.com
Sent: Friday, June 05, 2009 6:55 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts]
I used the 5372 for years to design and test SONET synchronizers. I had
option 40 istalled but never used it. I always downconverted my test clock
to 1 kHz or lower to increase the resolution of the counter.
-Original Message-
From: time-nuts-boun...@febo.com
Most likely, the clock needs 5V for the internal lighting. Many aircrft
clocks are mechanical, but some are lectrical and need 28VDC.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Charles Rushing
Sent: Thursday, May 21, 2009 1:45 AM
The challenge is to detect a failure of the GPS source (LOS) before the DPLL
moves the OCXO.
I used to design Stratum clocks for a large telecom company, and I used
several trick do detect a phase ramp on the digital phase detector; this was
used to declare a probable bad source. At that point,
There are techniques to remove/eliminate the phase error when the GPS source
comes back on line. If the holdover is entered appropriately, the frequency
error should be small and dependent on the stability of the OCXO.
-Original Message-
From: time-nuts-boun...@febo.com
I am looking for a manual for the FEI FE-5440A O-1824A/U cesium source. I
also need the instrument power up/set up instructions.
Thank you in advance!
Regards,
Francesco
Garland, Texsa
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