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Is the transmittal of digital signals between two or more points in a communications system?

A modem uses 16 different phases and 4 different amplitudes. How many bits does it transmit per symbol?

Find the minimum allowable bandwidth for a binary signal with a bit rate of 200kbps?

The bit rate of a digital signal is 3000 bps. If each signal element carries 6 bits, what is the baud?

What modulated signal is produced, if the information signal is digital and the amplitude of the carrier is varied proportional to the information signal?

Determine the minimum bandwidth for an FSK signal with a mark frequency of 99 KHz, a space frequency of 101 KHz, and a bit rate of 10 Kbps.

What modulated signal is produced, if both the amplitude and the phase are varied proportional to the information signal?

What is the bit rate of a 1000-baud, 16-QAM signal?

A ________ is simply the superposition of a series of harmonically related sine waves with specific amplitude and phase relationships.

A circuit that periodically samples the analog input signal and converts those samples to a multilevel PAM signal.

The position of a constant-width pulse within a prescribed time slot is varied according to the amplitude of the sample of the analog signal.

For a single-channel PCM system with a sample rate fs = 6000 samples per second and a seven-bit compressed PCM code, determine the line speed:

Is the process of converting an infinite number of possibilities to a finite number of conditions? Is the process of rounding off the amplitudes of flattop samples to a manageable number of levels?

If the magnitude of the sample exceeds the highest quantization interval, ________ (also called peak limiting) occurs.

The amplitude of a constant-width, constant-position pulse is varied according to the amplitude of the sample of the analog signal.

Involves compression in the transmitter after the input sample has been converted to a linear PCM code and then expansion in the receiver prior to PCM decoding.

For the sample-and-hold circuit, determine the maximum value of a capacitor that can be used. Given a maximum output current from Z1 of 10mA, maximum change in voltage across C which is 10V, and a charge time of 10µs.

Find the resolution given the maximum positive/negative voltage of 2.55V and the number of positive/negative nonzero PCM code of 8.

Determine the maximum bit rate for an FSK signal with a mark frequency of 102 KHz, a space frequency of 104 KHz, and a bandwidth of 8 KHz. a

Besides data bits, a DS-1 frame contains a:

A T1 carrier system, D-type channel banks perform the sampling, encoding, and multiplexing of 25 voice-band channels. Each channel contains an eight-bit PCM code and is sampled 8000 times a second with each channel sampled at the same rate but necessarily at the same time. What is the line speed of such a sophisticated carrier system?

A receiver for frequency-hopping spread-spectrum would be:

What is the output frequency of a super group bandpass filter having a carrier frequency of 1116 kHz and a super group frequency spectrum of 312 kHz to 552 kHz?

Which is not true about Frequency Division Multiplexing?

Five 5-kbps connections are multiplexed together. A single unit is 1 bit. What is the duration of 1 bit before multiplexing?

What is the line speed for problem no. 1 if the given system is changed to a 3 channel system?

Multiplexing allows many signals to ____________________ a channel.

Moving PCM samples from one time-slot to another is called:

If the baud is 400 for a QPSK signal, the bit rate is?

Amplitude Shift Keying is also known as?

It is the rate of change at the output of the modulator.

It is also known as the on-off keying.

The rate of change at the output (baud) is one-half of the input bit rate.

Determine the bandwidth and the baud for an FSK signal with a mark frequency of 32 KHz, a space frequency of 24 KHz, and a bit rate of 4 kbps

Determine the minimum bandwidth and baud for a BPSK modulator with a carrier frequency of 40 MHz and an input bit rate of 500 kbps.

A constellation diagram consists of 8 equally spaced points on a circle. If the bit rate is 4800 bps, find the baud.

TDMA is used instead of TDM when:

What is the average number of bits to acquire frame synchronization using added-channel framing with a system consist of 255 bits per frame and 12 bits of synchronization word?

The AM radio band is an example of ____________________-division multiplexing.

The bit-rate of a DS-1 signal over a T-1 line is: