Unit 1-4 URE
Spectrum conservation
Channel allocation
Ease of radiation
Companding
Binary amplitude shift keying, frequency shift keying, and phase shift keying
Pulse amplitude, frequency, and phase
Amplitude, frequency, and phase
Analog, digital and shift keying
Modulating signal, upper sideband, lower sideband
Carrier, upper sideband, and lower sideband
Upper sideband and modulating signal
Carrier and modulating signal
1.01 MHz, 1 MHz, and 0.99 MHz
1.1 MHz, 1 MHz, and 0.9 MHz
1.11 MHz, 1 MHz, 0.99 MHz
1.111 MHz, 1 MHz, 0.999 MHz
5 kHz
10 kHz
15 kHz
20 kHz
Two times the modulating signal
The same as the modulating signal
Determined by the modulation index
Defined in terms of maximum amount of modulation
Percent of modulation
Modulation index
Bandwidth
Deviation
Overmodulating increases bandwidth due to the production of harmonics
Undermodulating increases bandwidth due to the production of harmonics
Overmodulating increases bandwidth due to the output's increased amplitude
Undermodulating increases bandwidth due to the output's decreased amplitude
More total power
A reduction in carrier power
No reduction in carrier power
A reduction in carrier and sideband power
Inversely proportional to the amplitude of the modulating signal
Directly proportional to the amplitude of the modulating signal
Inversely proportional to the phase of the modulating signal
Directly proportional to the phase of the modulating signal
Sidebands containing at least 1 percent of the total transmitted power
Sidebands containing at least 3 percent of the total transmitted power
Sidebands containing at least 10 percent of the total transmitted power
Sidebands containing at least 0.1 percent of the total transmitted power
Deviation divided by frequency of modulation
Deviation times frequency of modulation
Sideband divide by carrier frequency
Sideband times carrier frequency
Phase is shifted at the rate of the modulating signal
Phase shifted with the phase of the modulating signal
Amplitude is shifted at the rate of the modulating signal
Amplitude is shifted with the phase of the modulating signal
Easier detection
Smaller bit error rate
Better signal-to-noise ratio
Higher data rates within a given bandwidth
Discrete amplitudes are assigned to the sampling pulses
A binary code number is assigned to the sample
The quantizer limits the amplitude of the pulses
The analog signal is band-limited
Sampling
Rectifying
Oscillating
Band limiting
Pulse width modulation (PWM)
Pulse position modulation
Pulse duration modulation
Pulse amplitude modulation
One character
Block of data
A parity bit
Synchronization (SYNC) bit
Determines parity
Determines transmission rate
Determines whether transmission is in American Standard code for information Interchange (ASCII) format
Determines whether transmission is synchronous or asynchronous
Checksum and cyclic redundancy check
Longitudinal redundancy check and checksum
Cyclic redundancy check and vertical redundancy check
Vertical redundancy check and longitudinal redundancy check
Checksum
Block check character
Cyclic redundancy check
Vertical redundancy check
Error-correcting code
Forward error control
Redundant data transfer
Automatic retransmit on request
Receiving end
In the oscillator
Transmitting end
In the primary buffers
Terminates fiber optics cable
Converts electrical energy into optical energy
Extends the distance and to preserve integrity
Accepts optical signals and converts them into electrical signals
Photo transistors
Hybrid photodiodes
Semiconductor laser diodes
Integrated photodiode/preamplifiers
Wait!
Here's an interesting quiz for you.