Some risk factors include tobacco use, alcohol use, having high cholesterol/diabetes, or a history of heart disease. Talk to your doctor about these risks and the benefits of using ospemifene. Who should not take Osphena? Show More
Some examples of signals are human voice, electrocardiogram, sign language, videos etc. There are several classification of signals such as Continuous time signal, discrete time signal and digital signal, random signals and non-random signals.
Digital Data/Analog Signals Must convert digital data to analog signal. One such device is a modem to translate between bit-serial and modulated carrier signals. To send digital data using analog technology, the sender generates a carrier signal at some continuous tone (e.g. 1-2 kHz in phone circuits) that looks like a sine wave. The following techniques are used to encode digital data into analog signals (Fig 2-18) Resulting bandwidth is centered on the carrier frequency. amplitude-shift modulation (keying): vary the amplitude (e.g. voltage) of the signal. Used to transmit digital data over optical ber. frequency-shift modulation: two (or more tones) are used, which are near the carrier frequency.