3D152 Volume 1 UREs
Amplitude modulation (AM) and frequency modulation (FM).
Pulse code modulation (PCM) and frequency shift keying (FSK).
Phase modulation (PM) and quadrature phase shift keying (QPSK).
Pulse code modulation (PCM) and continuously variable slope delta (CVSD) modulation.
Delta modulation (DM).
Digital modulation.
Analog modulation.
Adaptive modulation.
Delta modulation (DM).
Analog modulation.
Digital modulation.
Adaptive modulation.
Sidebands.
Sine waves.
Frequency translators.
Modulating frequencies.
Twice that of the modulating signal.
Half that of the modulating signal.
Twice that of the carrier signal.
Half that of the carrier signal.
Filtering.
Detection.
Compression.
Companding.
2 decibels (dB) of improvement.
4 dB of improvement.
6 dB of improvement.
8 dB of improvement.
Carrier wave.
Pure sine wave.
Resultant wave.
Composite wave.
A phase modulation (PM).
A pulse modulation.
A frequency modulation (FM).
An amplitude modulation (AM).
Phase.
Amplitude.
Frequency.
Amplitude and frequency.
Transmitted intelligence.
Intensity of speech.
Composite waves.
Splatter.
Carrier presence is required to detect changes.
It requires a less complex receiver than a basic phase shift keying (PSK) signal.
It requires a more complex receiver than a basic PSK signal.
The demodulator needs to detect changes in absolute phase values.
Pulse-amplitude modulation (PAM).
Pulse-duration modulation (PDM).
Pulse-position modulation (PPM).
Pulse-code modulation (PCM).
Modulation index.
Rate of phase shift.
Frequency of the modulating signal.
Amplitude of the modulating signal.
Delta.
Frequency shift keying (FSK).
Pulse-amplitude modulation (PAM).
Binary-phase shift keying or bi-phase shift keying (BPSK).
Four times.
Double.
Half.
The same.
Pulse-amplitude modulation (PAM).
Pulse-duration modulation (PDM).
Pulse-position modulation (PPM).
Pulse-code modulation (PCM).
Pulse-amplitude modulation (PAM).
Pulse-duration modulation (PDM).
Less tolerant of noise than frequency modulation (FM).
Analog-to-digital conversion.
3.
4.
5.
8.
Encoding.
Companding.
Uniform quantizing.
Nonuniform quantizing.
Channel.
Trunk.
Time slot.
Port.
Low speed and high speed.
High speed and EBCDIC.
CCITT and low speed.
EBCDIC and CCITT.
Frequency division.
Binary division.
Pulse division.
Time division.
Wavelengths or lambdas.
Wavelengths or gammas.
Frequencies or lambdas.
Frequencies or gammas.
One wavelength.
Two wavelengths.
Three wavelengths.
Four wavelengths.
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