Investigation of the Optimum Trigger Level in Time Interval Measurement

Hamza, Gihan Gomah

doi:10.1007/s12647-014-0102-4

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…The vector voltmeter HP 8405A can achieve the highest accuracy if it compares signals with equal levels [11]. Therefore, before measurement, we have to attenuate DUT and reference signals to achieve equal or approximately equal levels on vector voltmeter inputs.…”

Section: The Basic Idea and Improvement Of The Standard Methodsmentioning

confidence: 99%

Improved Method for Long-Term Frequency Stability Measurement Using Vector Voltmeter

Milanovic¹,

Beljic

Rakonjac³

et al. 2018

Teh. vjesn.

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This paper proposes a novel approach for the improvement of the long-term frequency stability measurement using an obsolete phase meter. The hypothesis of the paper states it is possible to fully automate measurement process and reduce measurement time using the standard method supported by bespoke PC software. This theory was examined in detail and experimentally validated using GPS standard method. The results of the experiment confirmed that measurement time can be reduced more than 50 %, at the expense of a measurement uncertainty increase. Still, the estimated measurement uncertainty of the proposed method is more than satisfactory for the calibration purpose of the most common oscillator types including rubidium frequency standards.

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Section: The Basic Idea and Improvement Of The Standard Methodsmentioning

confidence: 99%

Improved Method for Long-Term Frequency Stability Measurement Using Vector Voltmeter

Milanovic¹,

Beljic

Rakonjac³

et al. 2018

Teh. vjesn.

View full text Add to dashboard Cite

show abstract

“…According to equations (1) and (2), it is shown that as the slew rate increases as the error contributed by the Trigger Jitter and Trigger Timing Error decreases [12,13]. Practically and for sinusoidal signals, we use the optimum slew rate not the highest one [14]. Figure 2 shows a basic measurement setup for frequency measurement using the PCM…”

Section: The Phase Comparison Methods (Pcm)mentioning

confidence: 99%

An automatic multichannel generalized system for frequency measurement

Hamza

Mostafa

2015

Int. J. Metrol. Qual. Eng.

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Abstract. Monitoring the performance of the primary frequency sources continuously through comparing it versus the transfer standards and the calibration of the secondary frequency sources periodically versus the primary ones are of the main missions assigned to any time and frequency laboratory either it was a calibration laboratory or a national metrological laboratory. An automatic Generalized System (GS) for monitoring/calibrating any frequency source that has a Relative Frequency Offset (RFO) greater than 1×10 −14 Hz/Hz has been built. This GS is able to use either of two measurement methods according to the accuracy of the frequency source being measured. A graphical programming language, which is Labview, was used in writing the software required for both hardware control and data logging. So, the software can be easily reconfigured for any upgrading plans. Also a flexible arrangement for the hardware setup was used such that two measurement systems are merged in one system. So, according to the user needs the right hardware setup can be chosen. The results obtained by this GS were verified through comparing them to those generated by one of the commercial turnkey solutions.

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“…There are three main contributors to the systematic error; the time base error, the trigger level timing error, and the inherent or internal error of the time interval counter (TIC) counter. The effect of both the time base error and the trigger level timing error on degrading the measurement accuracy and uncertainty is insignificant if it was compared to the effect of the internal error of the counter [3,4]. The source of the internal error of the counter is the asymmetry in the electronics; which cannot be avoided [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A traceable time interval measurement with a reduced uncertainty

Hamza

2015

Int. J. Metrol. Qual. Eng.

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Abstract. Time interval (TI) is one of the basic quantities. Its measurement is not included only in the activities running in the time and frequency metrology but also included in the measurement of many other quantities that depend on time interval measurement (TIM). This means that improving the accuracy and reducing the measurement uncertainty of TI will reflect also on improving the accuracy and reducing the measurement uncertainty of many other quantities. To do that, we need to decrease or eliminate the effect of the dominant factors that degrade the quality of TIM. One of the major contributors to the measurement uncertainty of TI is the internal error of the time interval counter (TIC) used in the measurement. In this paper we introduce a methodology with which we can estimate precisely the internal error of the counter and eliminate its effect.

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Investigation of the Optimum Trigger Level in Time Interval Measurement

Cited by 5 publications

References 9 publications

Improved Method for Long-Term Frequency Stability Measurement Using Vector Voltmeter

Improved Method for Long-Term Frequency Stability Measurement Using Vector Voltmeter

An automatic multichannel generalized system for frequency measurement

A traceable time interval measurement with a reduced uncertainty

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