Improved digital dual-mixer time-difference technique and its applications

Křen, Petr

doi:10.1016/j.measurement.2022.110929

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…They can be caused by an imperfect impedance matching. The HROG-10 phase micro-stepper internally contains coaxial cables with SMA connectors (Minicircuits 086 Model Series with 'excellent return loss') that cannot be perfectly impedance-matched if they do not have a proper length (the phase-matched cable assemblies) [12] for a proper frequency (here at least for 10 MHz and 40 MHz). The problem is widespread, and thus probably affects also other types of the phase micro-steppers such as the AOG.…”

Section: Discussionmentioning

confidence: 99%

“…The phase delay measurements of the reference frequency 10 MHz within the paper are carried out by the previously published method described in [12]. The device under test in the setup is now the phase micro-stepper (see figure 1).…”

Section: Measurement Setupmentioning

confidence: 99%

“…The light red line corresponds to the stability for the zero-frequency difference. The dashed line represents limits of the measurement method also presented in [12]. The dotted line represents the relative frequency error equal to 10 −16 .…”

Section: Temperature Effectsmentioning

confidence: 99%

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The characterisation of a phase micro-stepper

Křen

2023

Meas. Sci. Technol.

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The frequency steering of the local standard time is a common procedure for the timekeeping. The local radiofrequency reference output is modified by a phase and frequency offset generator to corresponds to the global timescales such as the International Atomic Time (TAI) and Coordinated Universal Time (UTC) timescales. The phase and frequency offset generator, also known as the phase micro-stepper, is used for such timescales for many years but it has not been very well characterized metrologically. It will be shown for a particular type of the phase micro-stepper that its phase delay error can exceed 10 ps and its frequency offset error can be relatively more than 10-16 of the reference frequency.

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Section: Discussionmentioning

confidence: 99%

Section: Measurement Setupmentioning

confidence: 99%

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The characterisation of a phase micro-stepper

Křen

2023

Meas. Sci. Technol.

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Design and Implementation of Precision Phase Measurement Module Base on Digital Dual Mixer Time Difference

Qi¹,

Peng²

2023

AJST

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Precise phase difference measurement is critical for distributed time synchronization systems. Aiming at the problem of how to realize the sub-nanosecond phase difference measurement of the time signal, the digital dual mixer time difference (DDMTD) measurement technology is used to measure the fine transmission delay and the two digital clock phase difference. Given the problem that it is difficult to generate a common clock source with fine frequency changes inside the FPGA chip, the Si5338 chip is used to generate 4 differential clocks, and the communication with the FPGA is completed through the I2C protocol, and the differential signal is converted into a single-ended clock source inside the FPGA as two The common standard frequency of clock signals with the same frequency and different phases, realize the amplification of the phase difference measurement range, making the measurement accuracy reach sub-nanosecond level.

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Improved digital dual-mixer time-difference technique and its applications

Cited by 2 publications

References 12 publications

The characterisation of a phase micro-stepper

The characterisation of a phase micro-stepper

Design and Implementation of Precision Phase Measurement Module Base on Digital Dual Mixer Time Difference

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