test study 2 Flashcards
In a schematic diagram, how is current flow always portrayed on a transistor when it is forward biased?
Against the arrow
The two basic purposes of a transistor are either to perform as a…?
Switch or amplify a circuit
A Zener diode is specifically designed to operate in…?
Reverse bias mode
What power supply circuit senses changes in output voltages and compensates for the changes, usually within plus or minus 0.1 percent?
Regulator
What wave shaping circuit ties down the upper or lower extremity of a waveform to a fixed direct current (DC) potential?
Clamping
Which is not a conventional problem that microwave tubes overcome in order to be used in high power, high frequency oscillators and amplifiers?
Inter-cathode resistance
On a transmission line with an open termination, the wave is reflected back to the source and…?
There would be significant signal loss
What data bus was originally developed for military avionics applications?
Military Standard (MIL-STD)-1553
Energy travels through a waveguide because of…?
Interaction of magnetic and electrical fields
Three devices used to inject or remove energy from waveguides are known as…?
Probes, loops, and slots
When the modulation signal and carrier signal are combined within a modulator, the output signal contains the…?
Carrier, upper sideband, and lower sideband
Reducing modulation to less that 100 percent results in…?
No reduction is carrier power
The oscillator output in a frequency modulation (FM) modulator increase in frequency with each…?
Positive half cycle of the modulating signal
The formula to find the modulating index is…?
Deviation / modulation frequency
In phase modulation, the rate of phase shift is…?
Proportional to the frequency of the modulation signal
Space modulation is commonly referred to as…?
Difference in the depth modulation (DDM)
What is the first step in the pulse code modulation (PCM) process?
Band-limiting the analog signal
How does synchronous transmission reduce the overhead costs of data transmission?
Blocks many characters together for transmission
Which method of transmission required the receiving end to be synchronized with the transmitting commutator?
Time division multiplexing
When using forward error control as a method of error correction, error correcting takes place…?
At the receiving end
Which statement describes an advantage of using fiber optic (FO) cables?
Electromagnetic fields do not affect fiber optic cables
One disadvantage to using fiber optic (FO) cables is that…?
Nuclear radiation can darken the optical fiber and cause signal loss
What component of a fiber optic (FO) cable provides the reflective surface that allows light to propagate?
Cladding
When considering light wave prolongation, what is the name of the angle between the normal in the first material and the ray that is bounced back in the first material?
Angle of reflection
What logarithmic expression do we use to specify the ratio of power loss in fiber optic (FO) cables?
Decibels-per-kilometer
