Skylight Indoor GPS Timing System0 pages

Skylight™ Indoor GPS Timing System
Open a New Window to Accurate Time for your Network
•

GPS time without an outdoor
installation

•

Ofcial “Legally Traceable
Time” for your network and
other devices

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For leased facilities, urban
canyons, buildings with
prohibitively expensive cable
runs

•

Attractive antenna panel
designed for ofce installations

•

Works with other Global
Navigation Satellite Systems
for improved reliability

•

High stability internal oscillator
maintains precise time even
when GPS signal is intermittent

Even though synchronizing network master clocks and time servers to GPS is well-known as the
standard for the most time-sensitive applications, some data centers and critical server locations
are not conducive to traditional roof-top GPS antenna installation. Skylight™ provides a solution.
Consisting of an indoor GPS antenna panel, a conguration of Spectracom’s SecureSync® modular
GPS time server, and an interconnect cable, Skylight opens new possibilities for accurate GPS time.

BRAZIL | Rua Jose Alves dos Santos | Sao Jose dos Campos | SP – Brazil 12230-081 | +55 12 3933 2330 | sales@spectracomcorp.com

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UK | 6A Beechwood | Chineham Park | Basingstoke, Hants, RG24 8WA | +44 (0)1256 303630 | info@spectracom.co.uk

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FRANCE | 3 Avenue du Canada | 91974 Les Ulis, Cedex | +33 (0)1 64 53 39 80 | sales@spectracom.fr

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USA | 1565 Jefferson Road, Suite 460 | Rochester, NY 14623 | +1.585.321.5800 | sales@spectracomcorp.com

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Decorative cover is ideal for use in conference
rooms and ofce spaces

Skylight does not work everywhere. A signal to noise ratio above about 30 dBc/N0 at the antenna
panel is required. Subterranean and other radio-isolated locations will still need to be synchronized
using other techniques (such as over a network via a PTP master-slave combination) versus by GPS
directly. However, exterior walls or walls across from a window in above ground oors of a building
are likely candidates for Skylight. Even urban canyon situations can be considered as neighboring
buildings can often redirect signals to the antenna panel that contain useful timing information for
the Skylight system. And the signal does not have to be available 24/7. By using a precise stable
oscillator and our proprietary disciplining algorithms, Skylight needs the GPS signal for only a few
hours a day. Often the RF noise is reduced at night which can allow Skylight to maintain legally
traceable time even if signal acquisition is subpar during the day.

..

Skylight includes indoor GPS antenna panel,
cable, and SecureSync GPS time Server

GPS signals are weak and often impractical in urban environments due to limited visibility of the
sky, and constraints of roof-top access and long GPS antenna cable runs. Skylight is a result of
Spectracom’s expertise in GPS reception and applications for precision timing. Proprietary algorithms
use a combination of high sensitivity receivers, the expanding constellation of various global
navigation systems, accurate internal oscillators and assisted GPS to extract the GPS on-time point to
sub-microsecond accuracy even in areas with somewhat limited GPS reception.