What is the maximum deviation from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of ± 1.0 ppm?

What is the maximum deviation from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of ± 1.0 ppm?

• A. 156.52 Hz
• B. 15.652 Hz
• C. 1.5652 Hz
• D. 0.15652 Hz

Answer: (A)

To determine the maximum deviation from a reading of 156,520,000 Hertz based on a time base accuracy of ± 1.0 ppm (parts per million), you begin by calculating what 1 ppm represents at that frequency. The calculation is as follows: 1 ppm is equal to 0.000001 (or 1/1,000,000) of the total value. Therefore, to find the deviation in Hertz, you multiply the frequency by 1 ppm: 156,520,000 Hz × 0.000001 = 156.52 Hz. This means that at a frequency of 156,520,000 Hz, the maximum expected deviation due to the time base accuracy of ± 1.0 ppm is quantitatively 156.52 Hz. As such, choosing 156.52 Hz correctly reflects the maximum deviation that can be expected within the specified accuracy, making it the correct answer. Other options provide values significantly lower than 156.52 Hz, which do not represent the calculated deviation based on the given frequency and accuracy, indicating a misunderstanding of the units and conversion involved in calculating parts per million.

To determine the maximum deviation from a reading of 156,520,000 Hertz based on a time base accuracy of ± 1.0 ppm (parts per million), you begin by calculating what 1 ppm represents at that frequency.

The calculation is as follows:

1 ppm is equal to 0.000001 (or 1/1,000,000) of the total value. Therefore, to find the deviation in Hertz, you multiply the frequency by 1 ppm:

156,520,000 Hz × 0.000001 = 156.52 Hz.

This means that at a frequency of 156,520,000 Hz, the maximum expected deviation due to the time base accuracy of ± 1.0 ppm is quantitatively 156.52 Hz.

As such, choosing 156.52 Hz correctly reflects the maximum deviation that can be expected within the specified accuracy, making it the correct answer. Other options provide values significantly lower than 156.52 Hz, which do not represent the calculated deviation based on the given frequency and accuracy, indicating a misunderstanding of the units and conversion involved in calculating parts per million.