Hello all,
I'm working on discipling a FRS-C Rb oscillator using a M12T GPS and a
AT91SAM7S64 micrcoprocesador (ARM architecture) using the same concepts
described in the famous Brooks Shera article. I've two questions: For
timekeeping, it is better to turn on in the GPS both tropospheric and
Hello Javier,
this depends on your Rb oscillator, and if you use an external DAC circuitry
then the DAC and DAC reference thermal sensitivity as well.
Typically, the Rb including the DAC and DAC reference will be better than
the GPS for time frames from 1000 to 1s. The GPS will
Hello James,
I noticed that the M12+ has a significant temperature sensitivity,
especially when air is flowing over the TCXO. Try blowing air onto the TCXO, I
have
seen the 1PPS immediatly wander off by much more than 50ns before the M12+
shuts-off the 1PPS output.
Maybe you are seing
Said,
Hey! Whaddya mean CHEAP? The marketing guys call it feature laden and
cost effective!
Anyway, you're right. The M12+ is extremely sensitive to environmental
stimuli. On our receiver/adapter board assemblies I actually include a
piece of foam tape between the two boards that gives the
Can anyone please tell me what is the difference between a STANDARD GPS receiver
and a GPS TIMING receiver.
Also I am final year student and doing a thesis on.
Effects of Interference(CW) on GPS timing receivers in CDMA networks
At this stage I am mainly interested on what will happen to the
I may be the 259th to ask you, but do you have a date
when the new M12M will be officially available?
I almost have bought a Resolution T a few weeks ago
when i heard about the M12+ and it's successor, the
M12M. Now i'm waiting! Well... I know... this is a
forum about time... ;-)
Have a good
Hi Randy,
It's a feature, of course :)
I wish the marketing guys would have added the $1 cost for the top/bottom
metal can over the crystal and RF circuits (the layout engineer certainly
wanted it and added the footprint to the PCB:) - like the old UT+'s etc.
We all can't wait to see
Welcome to the list, z3066384.
Can anyone please tell me what is the difference between a STANDARD GPS
receiver
and a GPS TIMING receiver.
Often what is meant by a standard GPS receiver is
one that is optimized for position (lat,lon,alt). This is
what one would want on a hike, or in a car,
Has anyone been following the recently issued IEEE 1588 Precise Time
Protocol (PTP) standard?
http://ieee1588.nist.gov/
From what I've read, implementations have demonstrated 10-100 nanosecond
synchronization between computers connected via Ethernet.
Sweet.
I'm thinking of several research
