If you use ticks in you experiment you will need to use headphones
otherwise room acoustics does into play. With speakers you hear the
tick ad also the reflection of the tick off the walls. Your close
ticks will be on the same order as the delay due to reflections. The
effect is 100% real ad
From: Chris Albertson
It would be an easy experiment to get two analog clocks and put them
side by side. You would not even have to set them to the true time,
just to each other. Let one run slower and wait until you can see a
difference.
Clocks on a computer screen are different because the
Hi
Many years ago while standing around (between races) with some pretty good
stopwatches, a group of us decided to see
just how well a set of people could time the same pair of start / stop events.
Our conclusion was that as a
group we could get agreement to +/- 1/5 second pretty consistently
Moin,
On Mon, 06 Apr 2015 07:37:53 -0500
Robert Watzlavick roc...@watzlavick.com wrote:
Thank you very much for the references. I had come across [4] when
searching on Kalman filters for GPS aiding of INS measurements. I
didn't pay much attention to the GPS chapter at the time but I'll
We put together this comparative analysis between the LTE-Lite and LEA-M8F
based on our measurements and observations.
http://www.jackson-labs.com/assets/uploads/main/Comparative_analysis.pdf
We have also noted that the LEA-M8F seems to use the digital power supply
for its TCXO. This results in
An interesting look back: it's a copy of a Tracor ad showing someone
carrying a portable Rb clock down the stairs of a PSA plane. Lots of
history in that photo: no jetway, PSA, people wearing coat and tie on an
airplane. Even the street name for GTC, on Bellanca Av, redolent of
long-gone
The problem is the human visual system only processes one object at a time.
You can't look at and compare two separate items simultaneously. You could
minimize the effect by placing one clock face directly in front of the other
with like only the 12:00 positions visible (or two LEDs next to
On Fri, April 17, 2015 11:55 pm, Mark Sims wrote:
The SiLabs part only supports loop filter time constants down to 60Hz.
GPS loop filters usually use values in the 100's to 1000's of seconds.
They have other parts with loop filters down to 4Hz, and I thought I saw a
new part recently which
IIRC, automobile driver's stopping distance includes 200 msec to process
the need to stop.
Our wetware is not particularly fast.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Chris
Albertson
Sent: Saturday, April 18, 2015 12:51 AM
To:
Try this: Listen to time ticks thru earphones (zero time delay) and
loudspeaker (1ms/ft delay) simultaneously.
I am unable to hear a difference out to 15 -20ft away from the speaker.
This is consist with
http://whirlwindusa.com/support/tech-articles/opening-pandoras-box/
Delays of order 2-4ms
Timenuts who want to keep their oscillators oscillating regardless of
fluctuations in the power grid need a reliable Uninterruptible Power
Supply. The reference to immortal power is to an ancient and very
amusing account of UPS and DEC Vaxen.
As part of the decommissioning of my time lab, I
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