Signal | MCQs

Explanation

Lahore Development Authority is responsible for new planned development in Lahore, Pakistan.

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VU CBT FIA SI ASI PAPER 13-12-2021

Explanation

The full form of modem is modulator/demodulator.

It is a tangible device.

The main job of the modem is to help the computer to send and receive data by using a telephonic wire.

A hybrid computer uses a modem to convert digital signals from a computer into analogue signals.

Explanation

For point to point analog signaling, a bandwidth of up to about  1 MHz is possible.

Analog bandwidth is the maximum sinusoidal frequency of the analog signal the circuit works with. 

Explanation

Good voice reproduction via PCM can be achieved with 128 quantization levels, or 7-bit coding (27 = 128). A voice signal, conservatively, occupies a bandwidth of 4 kHz. 

Explanation

A baseband signal can be transmitted over a pair of wires (like in a telephone), coaxial cables, or optical fibers

Explanation

Input is never converted to digital form.

Explanation

Explanation

Digital signals are represented using binary code, where data is encoded into sequences of 0s and 1s.

Explanation

The most common technique to change an analog signal to digital data is called pulse code modulation (PCM). A technique used by codes to convert an analog signal into a digital bit stream is known as Pulse code modulation.