Home > Temperature-compensated and voltage-controlled crystal oscillator released

Temperature-compensated and voltage-controlled crystal oscillator released

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SBS Technologies, a leading designer and manufacturer of modular communication solutions, has released the expansion of its telecommunications product line with an AdvancedMC GPS module for AdvancedTCA and other communications systems. The Telum GPSTC-AMC is an AdvancedMC module that uses a GPS (global positioning system) clock to synchronise offsite network devices with other network devices.

Extremely precise GPS 30.72 MHz clock synchronisation

GPS clock module can free run to maintain synchronisation

Front panel RS-232 DB9 connector and BNC connector

AMC.0 module management subsystem (IPMI v1.5)

Typically, WiMAX (IEEE 802.16) base stations do not have physical access to the telecom network clocks that allow synchronisation with other devices on a given network. The Telum GPSTC-AMC module solves the problem of offsite clock synchronisation by using a GPS satellite network, which provides extremely precise clock synchronisation for WiMAX base stations without restricting their placement.

The Telum GPSTC-AMC provides a highly stable 30.72 MHz clock output that is phase aligned to GPS-derived 1 pulse per second (PPS) input providing extremely precise, highly reliable GPS clock synchronisation. This AdvancedMC module also uses a temperature-compensated voltage-controlled crystal oscillator (TCVCXO) with a 30.72 MHz center frequency and a minimum Stratum 3 stability of 0.37 parts per million (PPM).

With its low-jitter capability, the onboard crystal oscillator enables the GPSTC-AMC's microprocessor to filter out the short-term jitter that often affects GPS derived 1 PPS clocks, while still allowing the microprocessor to take advantage of the oscillator's long term precision. Phased error detection allows the GPS clock module to free run even if GPS input is lost.

An onboard Intelligent Platform Management Interface (IPMI) subsystem monitors board voltage and temperature conditions, maintains system status, and manages hot swap operation. In accordance with the AMC.0 specification, the Telum GPSTC-AMC is hot swap capable and field replaceable.

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