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== Multichoice spørsmål ==
 
== Multichoice spørsmål ==
−
Legger ut spørsmål med svar.
+
Legger ut spørsmål med svar. Rett opp feil hvis de oppdages.
  
 
*An anti-alias filter is
 
*An anti-alias filter is
−
  placed berore the input to remove frequancies above the Nyquist limit
+
  Placed berore the input to remove frequencies above the Nyquist limit
  
 
*The resolution of a DAC depends on
 
*The resolution of a DAC depends on
Linje 61: Linje 61:
  
 
*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?
 
*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
+
  They are equal
 
 
 
*Thermocouples need zero-point correction because
 
*Thermocouples need zero-point correction because
Linje 70: Linje 70:
  
 
*One of the following units is not used for magnetic fields:
 
*One of the following units is not used for magnetic fields:
−
  henry
+
  Henry
 
 
 
*The transmission velocity of a signal on a coaxial line depends mainly on
 
*The transmission velocity of a signal on a coaxial line depends mainly on
−
  The dielctric
+
  The dielectric
  
 
*Which of these number representations have more than one representation for zero?
 
*Which of these number representations have more than one representation for zero?

Revisjonen fra 30. apr. 2007 kl. 13:51

I faget 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.

Generelt

Tall i datamaskiner

Flyttall

Representasjon av negative tall

Støy

Støytyper

Data-konvertering

AD-convertere

Sampling

Diverse

Multichoice spørsmål

Legger ut spørsmål med svar. Rett opp feil hvis de oppdages.

  • 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
  • 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
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