Subminiature rubidium frequency standard: manufacturability and performance results from production units

McClelland, T.; Pascaru, I.; Shtaerman, I.; Stone, C.; Szekely, Csaba; Zacharski, J.; Bhaskar, N. D.

doi:10.1109/freq.1995.483881

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…According to the manual of the FE-5650A, its clocksteering resolution is approximately 0.01 ns. Therefore, the uncertainty associated with the clock-steering u b,12 is considered to be 0.01 ns [39]. The last is the uncertainty of REFDLY u b,13 , which is about 0.3 ns [40].…”

Section: Uncertainty Analysismentioning

confidence: 99%

Evaluation of receiver calibration based on clock-steering for time–frequency transfer

Guo,

Chen,

Gong

et al. 2023

Meas. Sci. Technol.

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Calibrating the Global Navigation Satellite System (GNSS) time-frequency transfer system is crucial for accurate GNSS time-frequency transfer. The most commonly used relative calibration method relies on the common-clock to eliminate clock differences. However, it cannot eliminate the changes in clock signal reference point delay (REFDLY). The changes in REFDLY during calibration could not be ignored, especially for ordinary users in an unstable environment. To address this issue, we use the GNSS real-time single-difference (GNSS-RTSD) time synchronization calibration based on clock-steering, which can detect the change in REFDLY. According to this method, the clock differences and REFDLY are eliminated simultaneously. We installed two GNSS antennas on the roof of the Xinghu Building of Wuhan University and designed a clock synchronization terminal to evaluate the performance of this method. The data were collected on Day Of Year (DOY) 152~156, 167~171, 222~226, 231~235, 244, 258, 260, and 262 in 2022. In accordance with the calibration results, the standard deviation better than 100ps, and the stability reaches 10^{-15}@10000s. Also, the time variance better than 60ps, and the uncertainty u_{CAL} better than 0.5 ns. Compared to the common-clock calibration, one of the most significant benefits is the elimination of REFDLY, which leads to decreased uncertainty and better stability over both the short-term and long-term.

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Section: Uncertainty Analysismentioning

confidence: 99%

Evaluation of receiver calibration based on clock-steering for time–frequency transfer

Guo,

Chen,

Gong

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…[2] This paper is an update to the results presented in 1995. In the next section, the motivations behind this ongoing effort are presented.…”

Section: Introductionmentioning

confidence: 89%

Subminiature rubidium frequency standard: performance improvements

McClelland

Pascaru²,

Shtaerman³

et al.

Proceedings of 1996 IEEE International Frequency Control Symposium

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At the 1995 Frequency ControlSymposium, performance results for the FE-5650ARb frequency standard were presented, The FE-5650A is a 2 16 cc (13 cubic inch) device capable of producing any output frequency between 1 Hz and 15 MHz, with a setting resolution of 1 x 10-l~. since then several technical improvements have been incorporated into the FE-5650A product. These improvements primarily af€ect the aging and temperature performance of manufactured devices. These improvements are of particular importance in applications such as GPS receiver clocks, where performance in relatively uncontrolled temperature environments, over a time period of -1 day are crucial.Allan variance at an averaging time of -1 day is used as a simple measure of performance to compare and rank individual devices. Measurements w i t h and without linear dnfl removal are presented, with a discussion of the practical implications of results.Statistical data from a large sample of manufactured devices are presented showing frequency aging and frequency vs. temperature performance before and after incorporation of the design improvements. Data and analysis are obtained from measurements made at FEI, as well as at NIST, in Boulder, CO.In addition, optional versions of the FE-5650A have been developed for operation over the extended military temperature range (-55 to +71"C), and also for operation in vacuum. Performance test results are presented for these devices.

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A high precision quartz oscillator with performance comparable to rubidium oscillators in many respects

Vaish¹

Proceedings of 1996 IEEE International Frequency Control Symposium

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Subminiature rubidium frequency standard: manufacturability and performance results from production units

Cited by 5 publications

References 1 publication

Evaluation of receiver calibration based on clock-steering for time–frequency transfer

Evaluation of receiver calibration based on clock-steering for time–frequency transfer

Subminiature rubidium frequency standard: performance improvements

A high precision quartz oscillator with performance comparable to rubidium oscillators in many respects

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