Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
73 Cards in this Set
- Front
- Back
|
An advantage of transistors over vacuum tubes is _______ |
smaller size |
|
|
Which came first? |
vacuum tubes |
|
|
Which components would be used to build a computer if size, power, consumption, and price were to be kept at a minimum? |
Integrated circuits |
|
|
One of the first commercially available computers was the _______ |
UNIVAC |
|
|
Many transistors can be formed on one _______ |
integrated circuit |
|
|
Which type of computer is used to manipulate enormous amounts of data? |
Macrocomputer |
|
|
A microprocessor system is made up of _______ |
5 basic parts |
|
|
Which is NOT a basic section of a computer? |
LED |
|
|
Which section of a microprocessor system is used for synchronizing processes? |
Control |
|
|
Which of the following is an example of an output device? |
Printer |
|
|
The stack pointer stores memory in what kind of system? |
Last In First Out |
|
|
The condition of the ALU is known as its _______ |
status |
|
|
The stack pointer _______ |
contains the address of the next empty location in the stack |
|
|
determines how much memory can be addressed |
The address bus size _______ |
|
|
Caches are basically _______ |
extremely fast RAM |
|
|
An L2 cache is _______ |
external to the processor |
|
|
All memory beyond the original 1 MB is considered _______ |
extended memory |
|
|
The two primary forms of memory are _______ |
ROM and RAM |
|
|
Dynamic RAM stores information in _______ |
capacitive cells |
|
|
What kind of Read Only Memory can be reprogrammed without being removed from the circuit? |
EEPROM (EAROM) |
|
|
The bending of a beam of light as it travels from one medium to another is called _______ |
refraction |
|
|
Light is traveling from medium 1 to medium 2 and the angle of incidence is steep. Which of the following combinations will result in total internal reflections? |
Medium 1: Fused Silica |
|
|
Light is composed of _______ |
Photons |
|
|
Which of the following statements is false? |
Light is a form of electromagnetic radiation containing massless bits of energy known as protons |
|
|
Which of the following materials may be used for a waveguide? |
Plastic and Glass |
|
|
Which part of the fiberoptic system is responsible for the transfer of light waves by total internal reflections? |
Transmission section |
|
|
Which part of the fiberoptic system is responsible for converting the light energy to electrical output signals? |
Receiver section |
|
|
If the optical light source emits green colored light into one end of a fiberoptic cable, what color should the light be as it exits the cable? |
Green |
|
|
If the fiberoptic cable is disconnected from the optical detector, the output signal _______ |
disappears |
|
|
If the optical light source emits infrared light into one end of a fiberoptic cable, the light exiting the cable should be _______ |
infrared |
|
|
Which of the following statements is true? |
A PCM signal is usually transmitted through a fiberoptic cable by energizing and de-energizing the light source |
|
|
The type of signal transmitted over a fiberoptic cable is _______ |
Light |
|
|
Which area of signal processing increases the signal's amplitude to a usable level? |
Amplification |
|
|
What type of measurement is typically used to identify the quality of an analog system's signal transmission? |
SNR |
|
|
What type of measurement is typically used to identify the quality of an digital system's signal transmission? |
BER |
|
|
How does the output from the Transmitter (signal to the fiberoptic cable) differ from the input to the Receiver (signal from the fiberoptic cable)? |
The input signal to the Receiver is distorted and smaller in amplitude than the output signal from the Transmitter |
|
|
Combining many data signals into one is known as _______ |
multiplexing |
|
|
In the experiment, what were the three sections of the transmitter? |
Fiberoptic Transmitter, Time-Division Multiplexer, and Data Signal Generator |
|
|
Using data signals with relatively the same magnitude avoids _______ |
Crosstalk |
|
|
In the experiment, what were the three sections of the receiver? |
Fiberoptic Receiver, Time-Division Demultiplexer, and Audio Driver |
|
|
How many data signals did we multiplex in the experiment? |
4 |
|
|
Fiberoptic systems are capable of transmitting _______ |
digital and analog signals |
|
|
Which area of signal processing combines different light wavelengths into a single signal? |
WDM |
|
|
Which type of multiplexing is most commonly used for fiberoptic systems? |
TDM |
|
|
The type of misalignment that occurs when the waveguides are not aligned along their central axis is called _______ |
Lateral displacement |
|
|
Which of the following statements is true? |
Signal loss usually does not result when the first waveguide has a smaller NA than the second |
|
|
Which type of misalignment usually has the lowest losses? |
Angular tilt |
|
|
Which type of misalignment usually has the highest losses? |
Lateral displacement |
|
|
This type of loss results when the waveguide's core is shifted and is not centrally located. |
Concentricity |
|
|
To how many millimeters should you trim down the excess fiber with cutters once the fiber has been inserted and crimped to the connector? |
1.5 |
|
|
What is used to make the fiber from 1.5 mm or more flush with the polishing fixture? |
600 grit abrasive paper |
|
|
Which of the following tools can be used to remove the outer jacket? |
Wire strippers |
|
|
How many wear indicator dots should be visible on the polishing fixture to be used correctly? |
4 |
|
|
What is used to make the fiber flat, smooth, and clean once it is flush with the polishing fixture? |
3 µm pink lapping film |
|
|
Polishing the end of a waveguide is _______ |
important since it helps ensure a smooth mirrored finish |
|
|
Which of the following should not be used to cut a waveguide? |
scissors |
|
|
What should be used before you finish polishing your fiber? |
Cleaning tissue |
|
|
Transferring a larger amount of information at a higher bit rate with more voice channels per cable requires _______ |
A wider bandwidth |
|
|
An optical fiber whose core is made of several concentric layers of material is called a _______ |
multimode graded index optical fiber |
|
|
An optical fiber that allows several simultaneous light paths is called a _______ |
multimode graded index optical fiber and multimode step index optical fiber |
|
|
What is the characteristic of an optical fiber that determines how well the integrity of the transmitted signal is maintained? |
Attenuation |
|
|
Your data book says that a certain LED's peak is 650 nm. What characteristic is this? |
Wavelength for the optical source |
|
|
Which of the following statements is true? |
LEDs typically have a wider spectral width |
|
|
Which component should you choose for the fastest response time and narrowest bandwidth at 300 nm? |
Laser |
|
|
Which optical source that we used was the photocell most sensitive to? |
Tungsten Lamp |
|
|
Which of the following sources had the least effect, if any, on the photocell? |
IR LED |
|
|
If an LED cannot turn on and off as fast as the signal it's trying to send, you should select an optical source with a smaller _______ |
rise/fall time |
|
|
Which numerical aperture rating requires an optical source capable of projecting a controlled, narrow beam of light? |
0.002 |
|
|
An optical fiber with a small numerical aperture _______ |
requires an optical source capable of projecting a controlled, narrow beam of light |
|
|
Microbend losses are due to _______ |
imperfections at the core-cladding boundary |
|
|
Which of the following uses a different type of material on at least one side of the PN junction in order to help confine and direct light better? |
Heterojunction LEDs |
|
|
A detector's responsivity changes with _______ |
wavelength |
|
|
Which of the following components is least likely to be used in fiber optics? |
photocell |
