Diamond Point has introduced the miniature Trimble Mini-TTM GPS (Global Positioning System) disciplined clock, a combined GPS receiver and ovenized quartz oscillator designed for the precise timing and synchronization of wireless data and voice networks.
The module uses GPS signals to discipline or calibrate the quartz oscillator, eliminating its natural tendency to drift, delivering a precision that emulates atomic clocks. Such precise timing and synchronization is essential in order to optimize the assigned bandwidth of wireless systems capable of operating across very large geographical areas.
The Mini-TTM GPS clock is capable of 12-channel simultaneous operation and provides a stable 10 MHz reference frequency and a precision 1 PPS (One Pulse Per Second) output of 20 nanoseconds accuracy. The module provides an update rate of 1Hz and an exceptionally low phase noise. An ultra-low power consumption of less than 350mA at 5V makes for extended battery life.
The architecture of the clock is designed to maintain the stringent CDMA (Code Division Multiple Access) holdover specification whereby synchronization accuracy must be maintained for extended periods if the GPS signal is lost or if the GPS receiver malfunctions.
An automatic self survey mode provides for a more accurate and stable reference source with faster recovery from power interruptions. Trimble’s Timing Superpackets technology offers the user all of the timing information required by the host application, in an easy-to-use format.
Unlike previous devices, which used conventional ASICs (Application Specific Integrated Circuits), the satellite receiver of the module incorporates a commercially available, general purpose DSP (Digital Signal Processor) chip. This flexible DSP approach and the unprecedented level of integration utilized in the Mini-TTM enables OEMs and system integrators to embed a simple, high reliability, cost-effective and precise time and frequency reference source in the smallest available form factor. The module, which measures just 129 mm x 35mm x 16mm, provides 1 PPS, 10 MHz and antenna interfaces via SMA-f connectors.
Due to its flexibility, the Mini-TTM module will be upgradeable in the field to Galileo L1 compatibility when the code structure becomes available.
The Mini-TTM disciplined clock from Diamond Point provides superior performance in a host of environments including, maximizing bandwidth for WLL (Wireless Local Loops), WiMax (wireless broadband connectivity), DAB, DVB and VSAT terrestrial and satellite broadcasting and US E911(Enhanced 911) mobile emergency caller location using TDOA (Time Difference of Arrival).
It supports the TSIP (Trimble Standard Interface Protocol) standard.
The Mini-TTM is designed to operate with Trimble's Bullet III GPS antenna in the hostile RF-jamming environments often encountered at wireless network transmitter sites. Furthermore, Trimble’s proprietary T-RAIM (Time-Receiver Autonomous Integrity Monitoring) carefully validates the satellite signals, ignoring inaccurate information that could interfere with the precision outputs.
The Bullet III GPS antenna, which is available in 5V and 3.3V versions from Diamond Point, offers a gain of 35 dB ± 3 dB, measures just 77.5mm x 66.2mm, weighs 170g and is designed for fixed mounting via standard 3/4" pipe thread. The clock module incorporates antenna open and short circuit detection and protection.
The Mini-TTM makes an ideal replacement for the previous Thunderbolt® GPS disciplined clock.
All system components are manufactured lead free and are RoHS compliant.
Software/manuals are available electronically and a starter kit is also available from Diamond Point for customer evaluation.
Diamond Point International (Europe) Ltd
Unit 9, North Point Business Estate
Kent ME2 4LX www.dpie.com
Tel: 01634 300900
Fax: 01634 722398
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.