I am developing a 8051 based frequency counter with
4 digit resolution.
Freq. renge:1Hz-10MHz
Accuracy:+/- 0.01 to 0.1

i used 3 divid by 10 counters
pll 4046 as multiplier
8051 for frequency measurment with mode 1 gate tiimer
mode 0 fre. counter

please suggest me ways thru which accurcy can be improved

Thank u