period 3 A1

period 4 A2

period 5 A2

period 6 A1

period 7 A2

period 8 A1

but how do tell if the signals are 1/(4f)... 2/(4f).... 0 etc ??

period 4 A2

period 5 A2

period 6 A1

period 7 A2

period 8 A1

but how do tell if the signals are 1/(4f)... 2/(4f).... 0 etc ??