Quasi-analog Signal

In telecommunication, a quasi-analog signal is a digital signal that has been converted to a form suitable for transmission over a specified analog channel. Note: The specification of the analog channel should include frequency range, bandwidth, signal-to-noise ratio, and envelope delay distortion. When quasi-analog form of signaling is used to convey message traffic over dial-up telephone systems, it is often referred to as voice-data. A modem may be used for the conversion process. Source: From Federal Standard 1037C and from MIL-STD-188

 

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propagation constant
propagation path obstruction
proration
protected distribution system
protocol control information
protocol data unit
provisioning
pseudorandom noise
pseudorandom number sequence
psophometer
psophometric voltage
public data transmission service
public land mobile network
pulsating direct current
pulse
pulse address multiple access
pulse amplitude
pulse code modulation
pulse duration
pulse link repeater
pumping
push to talk operation
push to type operation
quadrature
quadruply clad fiber
quality control
queuing delay
radiation angle
radiation mode
radiation pattern
radiation scattering
radio equipment
radio fix
radio horizon
radiometry
randomizer
random number
receive after transmit time delay
received noise power
receiver attack time delay
recognized operating agency
recorder warning tone (us)
record medium
recovery procedure