12 Questions
What is the main source of cyclic error in the EDM measurement system?
Electrical coupling between the reference signal and the measured signal
How does a measurement of more than 50m impact the cyclic error in the EDM system?
It reduces the error
What is the nature of the cyclic error along the length of the measurement unit?
It is often regarded as a sine curve
What can be said about the contaminating signal y3 in relation to the transmitted signal y1?
It has the same phase and frequency as y1 but with a much smaller amplitude
What happens when two waves of equal frequency are superimposed?
The resulting wave has the same frequency but different phase and amplitude
What does the mathematical model involving the reference signal and the signal back help explain?
The effect of cyclic error
What are the three main instrumental errors mentioned in the text?
Scale error, Cyclic error, Index error
How is the scale of the measured distance obtained?
From the modulated frequency generated by the quartz oscillator
What are the two components of time mentioned in relation to scale correction?
Long term and short term
How is the long term component of time related to changes in the oscillator frequency?
It changes in accordance with changes in the oscillator frequency
What can cause scale error apart from oscillators?
All of the above
What type of error is caused by phase inhomogeneities due to inequalities in phase information?
Non-cyclic error
Test your knowledge of instrumental errors and corrections with this quiz. Learn about scale error, cyclic error, and additive, zero or index error, and how to eliminate them by applying corrections to the measured distance. Understand the interrelated nature of these systematic errors and scale correction as a function of time and ambient conditions.
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