The oscillator generates a periodic output signal. One is by the frequency of the electronic signal being amplified. This specification refers to the frequency of the CPU's master clock signal. Antenna placement is crucial to receiving a clear signal. Absolute threshold is measured by using a method called signal detection. Each option has a corresponding hand signal. Temporal filtering is the removal of frequencies of no interest from the signal. DirecTV transmits programming with encryption to mitigate signal piracy. RS-422 specifies the electrical characteristics of a single balanced signal. This recognition signal triggers a rapid killing response. Hz control signal between the two machines. The receiver can reply with the "Attention" signal. Thus a cable should not signal faster than . This model is called a Gaussian white noise signal (or process). Components incapable of controlling current by means of another electrical signal are called "passive" devices.