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Precision Test
Systems manufacturers' frequency standards that are
disciplined to the GPS satellite system.
Example are our
GPS10RBN GPS
Disciplined, rubidium frequency standard and our
GPS10X GPS
disciplined, OXCO frequency standard.
At the present
time these frequency standards use the American GPS
(Global Positioning Service) satellite system.
However, once the
European Galileo system is up and running, we will offer
the option of our frequency standards being disciplined
to both systems. The advantage of this will be
increased reliability, accuracy and operation inside
buildings.
Both our GPS10RBN
and GPS10X use a 12 channel GPS receiver that has
especially been designed for timing applications.
There is a 1 pps output pulse aligned to UTC or GPS
time. The accuracy is typically 20 ns, as opposed
to 50 ns available from other type of GPS receivers.
Rubidium frequency
standards are much more accurate than OXCO based units.
This is because the data from the GPS signal, although
accurate, is very noisy. So frequency standards
need to average the data from the GPS satellite system
over long times.
OXCO oscillators
are normally averaged over seconds to a few minutes.
Longer averaging cannot be done as the OXCO crystal
oscillator may drift between averages.
Because rubidium
oscillators are typically 100 times more stable than
OXCO oscillators, the averaging time can be increased to
hours or even days. This means a rubidium is
typically ten times more accurate than a OXCO unit while
connected t the GPS system and 100 times more accurate
if the GPS signal is lost.
For more
information on our GPS disciplined frequency standard
range, click on one of the links below:
Also remember we
make some of the industries lowest phase noise
distribution amplifiers.
Click here for more
details of our distribution amplifiers.
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