Oscilloquartz OSA 453x Series GPS and GPS-less synchonisation receivers and re-timers

The existing and emerging standards in the world of mobile telecommunications and digital broadcasting demand the highest quality of synchronisation. A proper timing signal therefore becomes more and more important for media centres as well as for cellular networks where location services such as E911 will have more importance.

Oscilloquartz has built the engine of its OSA 5581C GPS-SR into a single casing format complete with an integrated power supply (12 or 24 V/48 V), to provide a flexible Time & Frequency solution to users requiring a compact single input/output timing unit or needing a one traffic channel retiming unit.

The architecture of the OSA 453x Series GPS and GPS-less synchonisation receivers and re-timers is designed to maintain the strict CDMA holdover specifications. The series is also suitable as a synchronisation source for UMTS, WCDMA and cdmaOne, as well as GPRS, CDMA and TDMA base station and mobile switches. The 1PPS and 10 MHz outputs make them suitable for synchronising DAB/DVB equipment.

The OSA 4530/1/2 GPS are GPS receivers providing E1/DS1/2.048 MHz outputs according to ITU-T G.703-X. Models 4531/2 also accept an auxiliary E1/DS1/MHz reference as a robust alternative to GPS. The OSA 4533/4 GPS and OSA 4535/6 RTM are re-timing modules that re-time one E1 or DS1 traffic signal. Models 4533/4 take GPS as reference, while 4535/6 smooth out timing impairments from the traffic signal and therefore need no external reference.

Features include: compact, in the standard 5 x 4 x 2″ format; possibility for one auxiliary input: E1, DS1, or frequency (4531/2 models); various output options - ITU-T G.703-X compliant E1/DS1/ 2.048 MHz; models with GPS can provide UTC-derived timing information through - UTC-locked 1 PPS output, TOD compliant to NMEA0183; re-timing of one E1/DS1 traffic signal; integrated high stability holdover functionality - frequency stability <1 x10-10 /day (typical); ITU- T G.811/ST1 compliant when locked to GPS; ITU-T G.812 (I, V, VI) compliant holdover; ITU- T G .812 (I, V, VI) filtering of auxiliary input.