NI 5402/5406
Sample Clock

The signal generator provides a high-precision 100 MHz Voltage Controlled Crystal Oscillator (VCXO) clock source for the Sample clock timebase. The Sample clock timebase frequency is tuned by an Internal Calibration DAC Control Voltage. This clock is used to drive the DAC and all other waveform generation operations on the device. The Internal Calibration DAC, which is calibrated at the factory and which you can also calibrate, provides for the Sample clock timebase to maintain a high quality frequency source.