The process of raising the strength of a weak signal is known as

Explanation:

• Amplification: It is the process of increasing the amplitude and strength of an electrical signal with the help of an amplifier usually a transistor amplifier. Amplification is important to compensate for the loss of strength during its transmission across the channel. It is done at the point in the channel where the strength of the signal becomes weakened. 
• During transmission of signals, the strength of the signal becomes weak and in that case, amplification is required to compensate for this loss of strength or attenuation.

Attenuation: It is the loss of strength of a signal during its transmission across the communication channel.

Signal Conditioning:

Most analog signals require some form of preparation before they can be digitized. Signal conditioning is the manipulation of a signal in a way that prepares it for the next stage of processing.

For example, thermocouple signals have very small voltage levels that must be amplified before they can be digitized. Other sensors, such as resistance temperature detectors (RTDs), thermistors, strain gauges, and accelerometers, require excitation to operate. All of these preparation technologies are forms of signal conditioning.