You are right but this small time when accumulated over years then it creates an error of second per say.
Some people may not interested in this error too.
For the above calculation the frequency will lie between the two possible frequencies.
50 ppm at 50 MHz means a deviation of 2.5 kHz, an amount that isn't really small for a lot of applications.
For a watch, 50 ppm implies an error of 26 minutes per year, for an UHF small band radio device, it would be considerably above tolerated error limits.
50 ppm at 50 MHz means a deviation of 2.5 kHz, an amount that isn't really small for a lot of applications.
For a watch, 50 ppm implies an error of 26 minutes per year, for an UHF small band radio device, it would be considerably above tolerated error limits.