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The frequency standard FN-GPS supplies 10 MHz, plus 2.048 MHz as an option, with an accuracy and stability determined by the standard time from the GPS satellite system. The frequency is monitored and adjusted by continuous comparison with the time markers on the GPS satellites. The comparison times are selected such that even in poor conditions, compliance with the technical data for the frequency standard FN-GPS is ensured. Frequencies other than 10 MHz are derived by direct digital synthesis.

Due to the worldwide availability of the GPS satellite signals and the possibility of operating the frequency standard FN-GPS using an external battery, operation in any location is possible. The weather-proof antenna can be fitted quickly and straightforwardly. For monitoring and documentation, important operating data are available on a serial interface that can also be polled using a modem. The frequency deviation compared to GPS can also be polled.

As the time provided by the GPS satellite system (UTC) can be traced back to national and international standards, given appropriate logging it is not necessary to calibrate the GPS-controlled frequency standards.

The most fundamental GPS receiver status data are available permanently via the RS 232 interface for monitoring and documentation. They can be transferred to an external computer, printer or to a modem for remote transmission. The measured frequency error compared to the GPS reference signal is also available via this interface.

In general test & measurement applications our Frequency Standard models are used as stand-alone reference sources in calibration laboratories or as in-house frequency standard to supply several labs and other test equipment with a cost effective reference signal. The high accurate geographical position data are useful in mobile measuring stations for radio monitoring, measurements of radio propagation characteristics etc. Minimum frequency deviations are guaranteed in synchronized broadcast stations and TV transmitters using precision carrier-frequency offset if they are supplied locally with a standard frequency.

The 2.048 MHz output is a reliable and independent clock source for telecommunications timing applications like PCM, SDH or SONET - even in areas with low level infrastructure. The output level corresponds to CCITT Recommendation G. 703 and accuracy to G. 811.

Product Categories: Frequency Standards

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