Testing Both ADC/DAC Circuit

When each segment of the circuit is tested and working, now it's time to test both ADC and DAC  circuit without the fiber optic transmitter and receiver. So we can test this by using a sine wave that feed into the ADC and then using the wire to connect to DAC and then observe the output. Bear in mind this it using the same clock for both chip just to check if there is a problem with the chip. First we need to supply master clock, bit clock and frame clock to the ADC and then feed a sine wave to the ADC and then digital data from the ADC output will then feed to the DAC input, therefore the output of the DAC should output a since wave. If we will get this then we can be sure that both chip are working fine. Most of the problems I encountered, were related with the clock. If the clock is not stable, the chip will result in error. Since master clock is main clock in this whole circuit we got to make sure that the master clock is stable. Otherwise, the frequency divider circuit will also get a wrong clock frequency value so they are all linked.