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BICSIcoppertransmiss

Chapter 1

QuestionAnswer
Transmission method that sends signals in either direction at the same time? Full-duplex
The height of the wave in a given cycle is it's? Amplitude
How many cycles per second are in 5khz? 5000
15,000 kHz in MHz? 15 MHz
An analog signal can vary in what two aspects? Amplitude and frequency
What device converts analog video signal to a digital signal? Codec
Information carrying capacity of a system? Bandwidth
V = I x R is the formula for what? Voltage
What is the total opposition to current flow? Impedance
Which of the following is considered balanced? A. UTP cable B. STP cable C. Coaxial cable D. Both A and B D. Both A and B
What is another term for dielectric material? Insulaton
Which of the following is not a signaling method? A. Simplex B. Half-duplex C. Attenuation D. Full-duplex C Attenuation
Ohms Law states V = I x R and P = V x I but what if you needed to know the power consumption? Pa Pa is Average Power, 70% of the power or = .707 V x A ( where I is expressed in Amps )
Random unwanted energy from an external source is know as? EMI Electromagnetic Interference
What is RFI; Radio Frequency Interference? Unwanted radio frequencies
EMF Electromagnetic Force is usually caused by transformers in an ER and can be best mitigated by what? Shielding
MHz vs Mbps, what is the difference? (Bandwidth is a term used loosely to actually describe both) Mhz is the width of the band of a frequency range used. 1Mhz uses all 1000 cycles per sec. Mbps is better referred to as the data rate then bandwidth, its the amount of data in bits that rides on the frequency.
In AWG when making a gauge change of 3 the cross-section and resistance doubles or halves, what happens to the diameter with gauge change of 6? Doubles or halves
Which of the following has no effect on Impedance? A.Resistance B.Induction C.Capacitance D.Attenuation D. Attenuation
Resistance is measured in Ohms Induction is measured in henrys Capacitance is measured in farads What is Impedance measured in? Ohms. Because Impedance is the overall opposition to current flow.
Impedance mismatch causes a reflection of a part of the signals energy. Also know as? Return Loss
A few pairs of the cable are untwisted a little to far at the connector closes to you. What can this cause? NEXT Near end Crosstalk
Both NEXT and FEXT are measured in Db. The larger the number the? Better
Why should a high Db be good for NEXT and FEXT? The Db measurement is the amplitude between the signal and the crosstalk. The larger the Db the further away the signal from the crosstalk.
Cat6a UTP should not mix with what two other cables in the same path way? Different manufactures of Cat6a & Lower performance cables
What is the difference between Propagation Delay and Delay Skew? Propagation Delay is the time interval for the signal to travel the cable. Delay Skew is the Propagation Delay between pairs in a 100ohm 4pair cable (10Mhz max)
What does SF/UTP mean? Overall screen and foil with unshielded twisted pair
Created by: smorita
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