I faget [[TFY4190 Instrumentering | Instrumentering]] består deler av evalueringen av en fire-timers prøve, der alle bøker samt Internett er tillatte hjelpemidler. I den forbindelse kan det være greit å ha en oversikt over nettsider med relevant informasjon. Linkene er forsøkt sortert slik pensumlisten er inndelt, enn hvor ulogisk den kan være.

Flervalgsoppgaver

Før evalueringen våren 2007 ble der lagt ut eksempeloppgaver. Under følger et utvalg av disse med svar.

• An anti-alias filter is Placed berore the input to remove frequencies above the Nyquist limit

• The resolution of a DAC depends on The number of bits

• A LabVIEW program gives the value of an integer as 65534. You know that this actually is a small negative number, but represented as an unsigned 16-bit integer. The small number is -2

• In addition to letters and numbers, the 7-bit ASCII code has codes for Codes for communication control

• If the transfer function of a regulator has poles in the right half plane The output will increase exponentially with time

• Suppose we have a small signal in the range 0 - 2 mV. It can be amplified by a factor of 1000. We have the choice of two AD converters, one 12 bit with range ± 10V and one 10 bit with range 0 - 5V. Which one has the best resolution? They are equal

• Thermocouples need zero-point correction because Their output gives the temperature difference between two junctions

• Shot noise has a frequency dependance that is called White noise

• One of the following units is not used for magnetic fields: Henry

• The transmission velocity of a signal on a coaxial line depends mainly on The dielectric

• Which of these number representations have more than one representation for zero? Sign + magnitude AND 1-complenent. (there is an error in the question, so it is removed from the test)

• A LabVIEW program is used to read the output of a 12-bit AD converter with range ± 10V. The binary output is available in 2-complement form. By some reason, the program gives the result in hex as C8A. Then the voltage is -4,33 V

• A 300 ohm transmission line is terminated with a standard 50 ohm pure resistive termination. A signal is transmitted on the line. There will be a phase reversal of the reflected signal