Abstract
Specifics of event timing data transmission are experimentally investigated under conditions typical for multi-channel data acquisition from a large quantity of signal sources. The events, in the considered case, are analog input signal and sinusoidal reference function crossings. The sequences of the crossing time instants represent the respective analog input signals and these sequences have to be transmitted to the signal reconstruction subsystem. An experimental system for fast short-distance transmission has been built. It performs data encoding on the basis of digital pulse position modulation with 10 picoseconds resolution. The achievable data encoding resolution and other vital parameters characterizing data transmission systems of this type were evaluated on this basis. DOI: http://dx.doi.org/10.5755/j01.eee.19.4.4055
Highlights
The necessity to perform short-distance transmission of picoseconds-resolution data comes up whenever event timing encoding is used
While the end-result of event timing typically has to be given as a picoseconds-resolution digital quantity, transmission of this information can be performed in two different ways, analog or digital
Both analog and digital information representations are used for event fixing in time and either analog or digital carriers can be used for transmission of this information
Summary
The necessity to perform short-distance transmission of picoseconds-resolution data comes up whenever event timing encoding is used. While the end-result of event timing typically has to be given as a picoseconds-resolution digital quantity, transmission of this information can be performed in two different ways, analog or digital Both analog and digital information representations are used for event fixing in time and either analog or digital carriers can be used for transmission of this information. This approach to analog signal digitizing has been used before and some of the gained experience in this field is described in [1]–[5] It is based on detection of analog signal and reference function crossing time instants and the obtained in this way sequence of time instants fully represent digitally the respective analog signal [6]. Alias-free data acquisition from wideband signal sources [9] and complexity-reduced processing of this type of data in the frequency domain can be performed [10], [11]
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