Read the whole question before answering!!!!!!! This is a timed test you will not have time to look up all answers, so be aware of that limitation.  I would answer all questions first, then look up info on the least confident answers.

1) Describe how a picture of your mom in bitmap format is sent to your friend in Texas.  Please get technical enough to assure me that you know. 5pts

2) Describe Switches and Routers.______________________________________________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ _______________________________________________________________________ 5pts ______________________________________________________________________________

3) Digital Signals are different than analog signals.  Explain each below. 6pts

 Digital:                                                                                                                      

Analog:

4) There are three parts in a fiber optic strand, draw them with a name attached to each part 5pts

5) What is one type of fiber optic amplifier? 5pts ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

6) A phonograph needle assembly changes _____________________________ into___________ ______________________________________________________________4pts 

7) The name of the Medium through which communication takes place in the following examples. Fill in after prompt 6pts

Two people talking to each other, 6 ft. apart :

Between Campers on two hills with signal fires:

Between a cell phone tower and your cell phone

8) What are the names of Quarks? 4pts

9)List three machines on which an analog recording can made. 6pts _______________________2____________________3____________________

10) Signals from an FM radio transmitter at 300 000 000 Hz produce waves that are how long? 4pts

11) Ionizing electromagnetic radiation includes all waves higher in frequency, or shorter in wavelength than what part of the electromagnetic spectrum? 5pts (either name the zone in the spectrum, or give a wavelength)

12) The multiplexing of signals on a fiber optic cable involves what three main methods of making the signals distinct from one another 1________________ 2________________ 3____________6pts

13)  A “Diode Laser” is found in  _________________________________________ 4pts

14) What is Proxima Centauri famous for? 5pts  _________________________________________________________________________________ _________________________________________________________________________________

__________________________________________________________________________________________________________________________________________________________________

15)  What do packets of internet data have at their head?______________________ 5pts

16) What do the letters in the acronym “l a s e r” stand for? 5pts

_______________   _________________ by the _______________   ________________

of   ____________________

17) The pits on a CD or DVD are used to encode digital information.  What aspect of the pits trigger a “zero”, and what aspect triggers a “one”? 8pts   (requires research) _________________________________________________________________________________________

___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

18) What is a Krypton flash tube? 1}________________

_________________________________________________________2}______________________________________________________________________3}____________________________________________________________________________________________________________________________ 6pts

19) A computer CPU is reaching heat and size limits.  What are they?  ________________________________ _____________________________________________________________________________________________________________________________________________________________________________. 4pts

20) An atom from which an electron has been stripped is ___________ tively charged. 4pts

21) Describe Frequency Shifting in a cell phone. 8pts

_________________________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________________________________

22) Why does the laser light in a fiber optic strand stay in the fiber? 5pts _________­­­­­­­­­­__________________________ _________________________________________________________________________________________

23) How can Radio signals be multiplexed in the air? 5pts  _________________________________________

__________________________________________________________________________________________________________________________________________________________________________________

24) Why do FM broadcast radios have better sound than Am broadcast radios?  4pts __________

__________________________________________________________________________________________________________________________________________________________________________________

25) Name two non-volatile computer memory devices. 6pts ________________________________________

________________________________________________________________________________________

26) Pulse Width Modulation (as discussed in class) is commonly used in the control of  5pts _______________

_________________________________________________________________________________­­­________