31. The clock signal acts like a metronome for an orchestra as it synchronizes the assembly of data. 32. By measuring this signal from several satellites, the receiver can re-build an accurate clock signal of its own. 33. In a variation, a single clock signal coordinates an entire system, but local pieces signal their completion asynchronously. 34. In a quad data rate system, the data lines operate at twice the frequency of the clock signal . 35. The adapter operated at 5 MHz and asynchronously to the CPU as it generated its own clock signal . 36. A distributed clock signal drives the coherence of receivers in the field and maintains timing for the correlator. 37. But the way that clock signals the rest of the body to follow the daily cycle has eluded researchers. 38. This is usually in the form of a digital counter, with the output signal acting as a clock signal . 39. Clock signals are often regarded as simple control signals; however, these signals have some very special characteristics and attributes.40. A second differential signal pair is used to transmit the associated clock signal from the source to the destination.