An engineer designs a microprocessor controlled ADC board that can acquire an 8 bit sample every 10 microseconds. His boss walks in and says: "You'll get a raise if the system can be modified to acquire a 12 bit sample every 100 milliseconds- but it needs to be done by tomorrow!" The first thing the engineer does is to measure the noise on the analog signal entering the ADC chip. He then smiles, and plans how to spend the extra money. In detail, explain what the engineer was looking for in the noise measurement, and how he can make the modification.