Description : It is the most prevalent encoding technique used for TDM signals:
Last Answer : PCM
Description : It is the procedure used to decide which device has the permission to transmit at any given time.
Last Answer : Line control
Description : Classification of protocol that interprets a frame of data as a group of successive bit combined into predetermined pattern of fixed length, usually 8 bits each.
Last Answer : Character and Byte-oriented protocols
Description : The time it takes a light induced carrier travel across the depletion region of the semiconductor.
Last Answer : . transit time
Description : In a ______ handoff, a mobile station can communicate with two base stations at the same time
Last Answer : . soft
Description : ______ are special-interest groups that quickly test, evaluate, and standardize new technologies
Last Answer : Forums
Description : A class A FM station is limited in antenna height of ______ feet above average terrain.
Last Answer : 2000
Description : The vertical field-scanning frequency is ______ Hz
Last Answer : 60
Description : The service are in standard AM broadcast is described as ______ if there is no fading of signal.
Last Answer : Primary
Description : The final power amplifier in an FM transmitter usually operates class ______.
Last Answer : C
Description : In a ______ handoff, a mobile station only communicates with one base station
Last Answer : hard
Description : One of the responsibilities of the transport layer protocol is to create a ______ communication.
Last Answer : process to process
Description : Which of the following describes a TDM frame? A. A 250-μs frame B. A 125-μs frame C. A 500-μs frame D. A 60-μs frame
Last Answer : B. A 125-μs frame
Description : The ______ technique expands the bandwidthof a signal by replacing each data bit with n bits. A) FDM B) DSSS C) FHSS D) TDM
Last Answer : DSSS
Description : If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ______. a. 64 Kbps b. 32 Mbps c. 32 Kbps d. 64 MbpS
Last Answer : c. 32 Kbps
Description : The PCM code for each channel occupies a fixed time slot called:
Last Answer : Epoch
Description : The line bisecting the major lobe, or pointing from the center of the antenna in the direction of maximum radiation is called _____
Last Answer : line of shoot
Description : The point on the antenna where the transmission line is connected is called _____
Last Answer : feedpoint
Description : The process of moving from one energy level to another is called __
Last Answer : Absorption
Description : The process of decaying from one energy level to another energy level is called _______
Last Answer : Spontaneous emission
Description : Any energy above the ground state is called ________
Last Answer : excited state
Description : Optical power is sometimes called ____
Last Answer : Radiant flux
Description : A waveguide may also be terminated in a resistive load that is matched to the characteristic impedance of the waveguide. The resistive load is most often called a _____
Last Answer : Dummy resistor
Description : Emphasizing low-level signals and compressing higher level signals is called:
Last Answer : companding
Description : An IC that contains A/D and D/A converters, companders, and parallel-to-serial converters is called
Last Answer : . Codec
Description : When satellite radio beam is aimed towards earth, it illuminates on the earth for an oval shaped area called
Last Answer : footprint
Description : The signal from a satellite is normally aimed at a specific area called the ________
Description : Bluetooth is a _______ technology that connects devices (called gadgets) in a small area
Last Answer : Wireless LAN
Description : IEEE has defined the specifications for a wireless LAN, called _______, which covers the physical and data link layers.
Last Answer : . IEEE 802.11
Description : Variation of biphase that is used for encoding SMPTE time code data and for recording on video tapes
Last Answer : Biphase – M
Description : A pulse modulation technique as the width of a constant amplitude pulse is varied proportional to the amplitude of the analog signal at the time the signal is sampled.
Last Answer : PWM, PLM, PDM
Description : Used for transmission of PCM encoded time – division multiplexed digital signal.
Last Answer : T carriers
Description : Category of data transmission if the binary pulse is maintained for the entire bit time?
Last Answer : Return to zero
Description : In the ________ traffic model, the rate of the data flow changes in time, with the changes smooth instead of sudden and sharp.
Last Answer : variable bit rate
Description : To prevent _________, we can timestamp the packets and separate the arrival time from the playback time
Last Answer : jitter
Description : Which of the following are functions of bearings? a) Ensure free rotation of shaft with minimum friction b) Holding shaft in a correct position c) Transmit the force of the shaft to the frame d) All of the listed
Last Answer : d) All of the listed
Description : In an Ethernet local area network, which one of the following statements is TRUE ? a. A station stops to sense the channel once it starts transmitting a frame. b. The purpose ... collision is detected. d. The exponential backoff mechanism reduces the probability of collision on retransmissions
Last Answer : The exponential backoff mechanism reduces the probability of collision on retransmissions
Description : Which component of seed drill is used for transmit power to operate seed dropping mechanism. a) Frame b) Transport wheel c) Seed box d) Covering device
Last Answer : Transport wheel
Description : The magnetic field of an antenna is perpendicular to the earth. The antenna’s polarization ___
Last Answer : is horizontal
Description : It is the ratio of the power density radiated in a particular direction to the power density radiated to the same point by a reference antenna, assuming both antennas are radiating the same amount of power
Last Answer : directive gain
Description : The property of interchangeability for the transmitting and receiving operations is known as ____
Last Answer : reciprocity
Description : The fields surrounding the antenna do not collapse their energy back into the antenna but rather radiate it out in space
Last Answer : radiation field
Description : It is the ratio of the radiated to the reflected energy:
Last Answer : Radiation efficiency
Description : It is the resistance that, if it replaced the antenna, would dissipate exactly the same amount of power that the antenna radiates
Last Answer : . Radiation resistance
Description : Plots of field strength or power density with respect to the value at a reference point.
Last Answer : relative radiation pattern
Description : The radiation pattern plotted in terms of electric field strength or power density
Last Answer : absolute radiation pattern
Description : A special type of transmission line that consist of conducting metallic tube through which high frequency electromagnetic energy is propagated
Last Answer : waveguide
Description : If energy is applied at the geometrical center of antenna, the antenna is said to be ___
Last Answer : center-fed
Description : The radiation pattern of collinear and a broadside antenna is __
Last Answer : bidirectional