Xi'an SYNC

First, Configuration description

According to the current requirements and future development of a measurement unit, we recommend the following time-frequency metering configuration plan for you.

Two. system composition

The system is tamed by GPS, including rubidium atomic frequency standard, high stable crystal oscillator frequency standard, universal counter, stopwatch calibrator, time interval generator, tester and signal source. Phase meter and so on.

Configuration Description:

GPS tame rubidium atomic frequency standard is used as a reference standard for general counters to measure the long-term stability of the instruments under test, and the accuracy meets the standard of frequency measurement based on rubidium atomic frequency standard. The high stability crystal frequency standard is used as a reference standard for the phase noise meter to measure the short-term stability and phase noise of the instrument under test. GPS tame rubidium atomic frequency standard is also used as a reference source for standard time interval generator and measuring instrument. It is used to provide standard signals and generate standard time interval signals for calibrating the frequency meter's time interval measurement and periodic measurement function. The signal source uses rubidium clock as an external reference to generate various signals. Stopwatch calibrator can detect various stopwatches and measure the waveform of the oscillograph.

Three, detailed configuration

Four, system characteristics

The system has the characteristics of high reliability, flexible configuration, high precision, wide measuring range and high automation.

1. high reliability of the system

The SYN3204 GPS tame rubidium atomic frequency standard contains the original rubidium oscillator installed in the US, and its MTBF (maximum fault free working time) can reach 200 thousand hours. The frequency standard device organically combines rubidium oscillator, low noise and high stability OCXO with GPS high precision timing, frequency measurement and time synchronization technology, so that the output frequency of rubidium oscillator can be traced to the GPS satellite automatically, and the long-term stability and accuracy of the signal can be improved.

The SYN3303 type high stable crystal oscillator frequency standard is a quartz crystal frequency standard with low phase noise and high stability. You can input the 10MHz sinusoidal signal and output the 10MHz sine signal.

2. flexible and open system configuration

In the system, Agilent53230A general counter, SYN5605 type time interval occurrence and measuring instrument, stopwatch calibrator, radio frequency signal generator, SYN5619 phase noise analyzer spectrum analyzer and other flexible matching. Make the unit purchase the value of the instrument to make full use of, not to cause waste.

3. high test accuracy

The three level of measurement is generally the highest standard in terms of rubidium atomic frequency standard. We know that the highest frequency standard in the world is the cesium atomic frequency standard represented by HP5071A. Its main technical index is short-term stability: less than 1.5E-11/1s, less than 5E-12/10s, and accuracy is less than 1E-12.SYN3204 GPS tame the rubidium atomic frequency standard. When the GPS antenna is erected according to the requirements, the accuracy of the output frequency can reach less than 1E-12. The short term stability of the SYN3303 type high stability crystal frequency standard is less than 5E-13/1s.

4. wide range of measurement

The system can test the frequency of sinusoidal or impulse signals whose output frequency is as high as 350MHz (matching different frequency ranges of the selected parts), and the accuracy of the measured frequency is not high. This provides equipment protection for any frequency tested by the unit.

Guide for selection of related products

Five. Application of time-frequency measurement system

The time-frequency measurement system is mainly designed for various metrology units in China. It is mainly used to measure frequency meters, signal sources, crystal oscillators, etc. it has high cost performance, simple operation and complete functions. It is suitable for most metrology institutes in China to set up the time and frequency measurement standard. It has set up a time and frequency measurement system for dozens of measurement units in China, and has won wide acclaim from users.