Interference sources

Remove/isolate interference sources Periodically test grounding Provide adequate lightning protection... 

Lest you think that the laboratory balance has been made perfect by the servomotor, realize that the servomotor is electronic and therefore is susceptible to various types of interference. Sources of interference include ... 

Lubricant condition monitoring is best accomplished by the analysis of numerical data that are associated with the various fluid failure modes [2]. Numerical data can be analysed by statistical methods to determine the relationship between the various test parameters and their respective fluid and machinery failure modes. In addition, the statistical analysis can be used to determine potential data interference sources, the various alarm limits for each parameter and other criteria to be used in the daily evaluation of used oil. Note that it is important to determine all of the causes for variability in parametric data, just as it is necessary to separate changes due to interfering causes from changes with its associated relevant failure modes. 

Table b. Potential spectral interference sources when analyzing wastewater with ICP-AES... 

Speech enhancement aims at improving the performance of speech communication systems in noisy environments. Speech enhancement may be applied, for example, to a mobile radio communication system, a speech recognition system, a set of low quality recordings, or to improve the performance of aids for the hearing impaired. The interference source may be a wide-band noise in the form of a white or colored noise, a periodic signal such as in hum noise, room reverberations, or it can take the form of fading noise. The first two examples represent additive noise sources, while the other two examples represent convolutional and multiplicative noise sources, respectively. The speech signal may be simultaneously attacked by more than one noise source. 

FIGURE 20.10 Example of interference sources in distortion and noise measurements. 

Differential-mode interference An interference source that causes a change in potential of one side of a signal transmission path relative to the other side. 

Figure 4.15 Two-stage dilution system with gas dispersion bottle as interference source.

In practice this is achieved with timers that trigger the respective transmissions. However, this approach may perform poorly, with high significant packet losses during certain periods of time, herein called critical periods, independently of the network load. This is the case in the presence of interfering external periodic traffic with approximately coherent periods. In this case, given the fixed TDMA round structure, the protocol will continue triggering transmissions at the same time as the interference source, until the clock drifts eventually set those instants apart (Fig. 2). 

CORREAL system enables measurement of the real potential with the elimination of the IR component even in soils of high resistivity and with interactions of the ac currents, simplifying identification of interference sources. 

FIGURE 1 Scale model for the McGuire Nuclear Station Reactor fabricated to help identify interferences. Source Photo courtesy of Duke Energy. 

AIS is also subject to the effects of Tropospheric ducting that can propagate VHF signals hundreds of miles fl-om their origin (Biancomano 1998). Such effects can introduce interference sources to signals from AIS stations within the nominal AIS reception range and can result in performance reduction of AIS both ashore and on vessels (ITU 2007). 

The Spaceship design shall control low frequency electric and magnetic fields (LFE and LFH), as specified in the Environmental Requirements Document (ERD) Use twisted shielded pair cables and coaxial cables for power. Run power cables inside the boom. Design radiation and micrometeoroid shielding to also provide EMI shielding. Maximize separation of sensitive science instruments from interference sources. 

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