While using a frequency counter for measuring frequency, two modes of measurement are possible. I) Period mode ii) Frequency mode. There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4 MHz the cross-over frequency is given by

While using a frequency counter for measuring frequency, two modes of

1.	While using a frequency counter for measuring frequency, two modes of measurement are possible. I) Period mode ii) Frequency mode. There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4 MHz the cross-over frequency is given by
A.	8 MHz
B.	2 MHz
C.	2 kHz
D.	1 kHz
Answer» D. 1 kHz