Part of Cathodeon still exist in Cambridge. Not crystals unfortunatly, but the
lamp and discharge tube business. They are now part of Heraeus.
www.cathodeon.com still links you to the website. It might still be worth an
email, there might be some old hands left. I know of one case were an
Some (Penrose, Nottale) suggest that time may be discrete rather
than continuous.
Though 10E-43 second might be difficult to measure.
Poul-Henning Kamp wrote:
It is a perfect example of what I said earlier: people cannot grasp
that time do not come in parcels...
Hello,
I have a couple of Motorola Remote GPS units (part number RWPRF12104) and am
looking for the mating connector. The unit has a Deutsch MMP 21C-2212P1
locking connector, which has twelve pins. I'm looking for the connector that
mates to this one. According to the Deutsch numbering scheme,
Hi Dan,
This is the same connector as the Trimble Palisade and Acutime receivers.
Try
http://uk.farnell.com/deutsch/imc21-2212x/receptacle-inline-12way/dp/890108
They also have a US office (they own Newark).
Regards,
Robert G8RPI.
--- On Mon, 25/5/09, Dan Veeneman d...@olphschool.org wrote:
Aficionados of accurate time,
I have two Panasonic DVD TV recorders, a DMR-EZ27 and 28. They were set to
automatically sync time to a TV station. This worked fine until a few months
ago. Now they are on manual time, but, of course, they drift.
Tried to turn automatic time setting back on this
Hi Bill,
I have no direct knowledge of the situation, but I have noticed that
in my area the time signals seem to piggyback on the PBS stations, and
in my area many of the PBS stations have ditched their analog signals
earlier than the FCC mandate for digital TV.
-Chuck Harris
Bill Hawkins
On 5/25/09 9:52 AM, Bill Hawkins b...@iaxs.net wrote:
Aficionados of accurate time,
I have two Panasonic DVD TV recorders, a DMR-EZ27 and 28. They were set to
automatically sync time to a TV station. This worked fine until a few months
ago. Now they are on manual time, but, of course,
Why did TV stations stop broadcasting time signals? HDTV requirements?
One thing that may be relevant
Many years ago, all the TV sources were kept in sync so there wasn't any
glitch when they switched feeds. The sync timing was distributed from at
atomic clock at network headquarters.
The NBS published a booklet on constructing a device that could receive
the sync signals and provide a reasonable secondary frequency standard.
I still have that book around in some box. I should look for it.
IIRC, the signal originated from a Cesium standard and was used to sync
the color so MTM
The NBS published a booklet on constructing a device that could receive
the sync signals and provide a reasonable secondary frequency standard.
I still have that book around in some box. I should look for it.
IIRC, the signal originated from a Cesium standard and was used to sync
the color so
It appears that the time information is transmitted in line 21 of the
analog TV signal.
This is the same line that carries Close Captions in an analog signal.
It further appears that PBS is the major carrier of these time signals.
See :
I think you're talking about the VITC, which is on lines 19 and 20 (so you
get it on both fields with interlacing). VITC carries
hour/minute/second/frame (same as LTC), but I don't know if it's program
time (since start of program) or real time).
There's a bunch of flavors of vertical interval
Has anyone used the National Instruments WLS-92xx or ENET-92xx
ethernet- and wireless-based data acquisition systems? Have you been
able to use them without using NI software? Is their protocol
documented anywhere?
It's an interesting product family, with 802.11 or ethernet
interfaces, you can
Oh yes it does... the postman just brought me a parcel full of time from China
;-) ... including rubidium time, DOCXO time, and some GPS time.
---Poul-Henning Kamp wrote:
It is a perfect example of what I said earlier: people cannot grasp that time
do not come in
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