RHM 3 ESAT PART 3

In a ____ handoff, a mobile station can communicate with two base stations at the same time.

The newer and perhaps the best cordless phones use DSSS in the

A signal at the input to a mu-law compressor is positive, with its voltage one-half the maximum value. What proportion of the maximum output voltage is produced?

____is an analog cellular phone system using FDMA.

AMPS operates in the ISM____band.

A function provided by SLIC that is another name for A/D conversion and D/A conversion is

What is the last address of a block of classless addresses if one of the addresses is 12.2.2.127/28?

An organization is granted a block; one address is 2.2.2.64/20. The organization needs 10 subnets. What is the subnet prefix length?

An organization is granted a block; one address is 2.2.2.64/25. If the subnet prefix length is /28, what is the maximum number of subnets?

240. Calculate the maximum efficiency of an asynchronous communication system using ASCII with seven data bits, one start bit, one stop bit, and parity bit.

In AMPS, each band is divided into_____channels

AMPS has a frequency reuse factor of_____.

The smallest element or part of a picture is a

Find the maximum dynamic range fir a linear PCM system using 16-bit quantizing.

An IPv4 address consists of_____bits.

In IPv4, class_____ has the greatest number of addresses in each block.

Identify the class of the following IPv4 address: 4.5.6.7.

Identify the class of the following IPv4 address: 229.1.2.3.

AMPS uses_____to divide each 25-MHz band into channels.

D-AMPS uses ____to divide each 25-MHz band into channels.

Which of the following is not a function provided by the subscriber line interface circuit?

How many Hamming bits are required for a block length of 21 message bits?

GSM allows a reuse factor of _____

GSM is a digital cellular phone system using .

The group of basic circuits such as ringing, dial tone, and dialing supervision provided for each telephone connected to the central office is referred to as

IS-95 is based on _____

Radio channel has a bandwidth of 10 kHz and a signal-to-noise ratio of 15 dB. What is the maximum data rate that can be transmitted using a code with four possible states?

IS-95 uses the ISM band.

A radio communication system designed to signal individuals wherever they may be is

IS-95 uses the ____ satellite system for synchronization.

In an IS-95 system, the frequency-reuse factor is normally_____.

In the third generation of cellular phones, ____uses W-CDMA.

In the third generation of cellular phones, ____uses CDMA2000.

The most complex and expensive part of any cellular telephone system is the

A(n)_____signal is a composite analog signal with an infinite bandwidth.

Which of the following is not a common type of media used in data communication?

Baseband transmission of a digital signal is possible only if we have a ____channel.

If the available channel is a ____channel, we cannot send a digital signal directly to the channel.

Any technique that is used for multiplexing many signals on a single communication channel is referred to as

For a____channel, the Nyquist bit rate formula defines the theoretical maximum bit rate.

In hexadecimal colon notation, a 128-bit address is divided into_____sections, each _____hexadecimal digits in length.

An IPv6 address can have up to ____colons.

An IPv6 address can have up to ____hexadecimal digits.

All cell phone systems are

For a channel, we need to use the Shannon capacity to find the maximum bit rate.

A modulation and multiplexing technique that distributes a signal and its sidebands over a very wide bandwidth is called

_____can impair a signal.

279. The ____ product defines the number of bits that can fill the link.

Which of the following is not a widely used modem type?

Which generation of cell phone systems is only available in a few major US cities?

In the third generation of cellular phones,____uses a combination of W-CDMA and TDMA.

Which cellular access system allows many users to share a block of spectrum by dividing it up into many smaller channels?

Before data can be transmitted, they must be transformed to_____.

A periodic signal completes one cycle in 0.001 s. What is the frequency?

The circuit used to perform D/A conversion is the

In a frequency-domain plot, the horizontal axis measures the____.

In a time-domain plot, the horizontal axis is a measure of_____.

A signal that is mistakenly sampled when the sampling frequency is less than twice the input frequency is a(n)

If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?

What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz?

The smallest increment of voltage that the D/A converter produces over its output range is called the

As frequency increases, the period _____.

Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ____that of A.

If the output increases in one increment of resolution voltage for each increment of binary number input, the DAC is

A sine wave is___

If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ___V.

Maximum analog input frequency = 4 kHz. Maximum decoded voltage at the receiver = +/- 2.55V. Minimum dynamic range = 46 dB. For a PCM system with the following parameters, determine the resolution,and the quantization error.

A circuit that converts an instantaneous value of analog voltage into a binary number is the

A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means .

Calculate the sound intensity level in dB of a sound whose intensity is 0.007W/m^2?

_____ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium

Which of the following is not a common method to translate an analog voltage to a binary number?

_____is a type of transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.

A telephone signal takes 2 ms to reach its destination. Calculate the via net loss required for an acceptable amount of echo.

____is a type of transmission impairment in which an outside source such as crosstalk corrupts a signal.

To save space in IC chip design, resistor networks can be redesigned as

When propagation speed is multiplied by propagation time, we get the _____.

309. Determine the baud for a binary FSK signal with a mark frequency of 49 kHz, a space frequency of 51 kHz, and an input bit rate of 2 kbps.

Which one is not a contiguous mask?

The number of addresses in a class C block is_____.

The number of addresses assigned to an organization in classless addressing_____.

The first address assigned to an organization in classless addressing______.

The PCS-1900 band extends from

Data can be _____.

______data are continuous and take continuous values.

_____data have discrete states and take discrete values.

An exchange serves 2000 subscribers. If the average BHCA is 10,000 and CCR is 60%. Calculate the busy hour calling rate.

Which of the following is not a key ADC specification?

Signals can be____

_____signals can have an infinite number of values in a range.

For an 8PSK system, operating with an information bit rate of 24 kbps, determine bandwidth efficiency.

In the third generation of cellular phones, ____ uses TDMA.

Which of the following features is not currently available with current cell phone technology?

Which error detection method uses one's complement arithmetic?

Determine the number of channels per cluster and the total channel capacity for a cellular telephone area comprised of 10 clusters with seven cells in each cluster and 10 channels in each cell.

Which error detection method consists of just one redundant bit per data unit?

A radio system that provides standard telephone service by two-way radio at remote locations is

In cyclic redundancy checking, what is the CRC?

A video signal has 50% of the maximum luminance level. Find its level in IRE units.

As assigned by the Federal Communications Commission, cellular radio systems operate in the

In cyclic redundancy checking, the divisor is_____the CRC.

A burst error means that two or more bits in the data unit have changed.

If a group of trunk is offered 1200 calls during the busy hour & 20 calls are lost along with the average call duration of about 7 min, then what would be the total duration of congestion period?

A cordless telephone is a

In______error correction, the receiver corrects errors without requesting retransmission.

In____error correction, the receiver asks the sender to send the data again.

The linear mixing process in an FDM system that does not attenuate the signal uses

We can divide coding schemes into two broad categories: ____ and ___ coding

In modulo-2 arithmetic, _____give the same results.

Which multiplexer operates as a single- pole multiple-position mechanical or electronic switch that sequentially samples the multiple analog inputs at a high rate of speed?

The_____ than the______of errors is more difficult .

In modulo-11 arithmetic, we use only the integers in the range , inclusive.

If a telephone exchange serves 1500 users with the average BHCA of about 9000 and CCR is about 50%, what would be the busy hour calling rate?

In modulo-2 arithmetic, we use only____.

The basic subsidiary communications authorization signal is a separate subcarrier of

349. Adding 1 and 1 in modulo-2 arithmetic results in _____.

350. In block coding, if k =2 and n =3, we have____invalid codewords.

On average, during the busy hour, a company makes 120 outgoing calls of average duration 2 minutes. It receives 200 incoming calls of average duration 3 minutes. Find the incoming traffic.

An alternate service provided by some FM stations that allows digital data to be transmitted to the FM receiver is called

The Hamming distance between equal codewords is_____.

The Hamming distance between 100 and 001 is .

Another name for an FM demodulator is

In block coding, if n = 5, the maximum Hamming distance between two codewords is .

If the Hamming distance between a dataword and the corresponding codeword is three, there are ____bits in error.

Cellular radio systems divide the service area into many smaller areas known as

The____of a polynomial is the highest power in the polynomial.

What is the result of ANDing 0 and 15?

Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/24.

An organization is granted a block of classless addresses with the starting address 199.34.76.64/28. How many addresses are granted?

An organization is granted a block of classless addresses with the starting address 199.34.76.128/29. How many addresses are granted?

What is the default mask for class A in CIDR notation?

In a block, the prefix length is /24; what is the mask?