Hi Oleg,
I am using 3 divide by 10 counters as dividers fo higher freq. 100KHz onwards and
As multipliers (as i am using PLL)
for freq. range 1Hz-9.99KHz
& Directli feeding freq in between 10KHz to 99.9KHz
Hence controller counts it properly for entier range

My problem is o/p has variations as compare to standard frequency meter over same gating period
i.e. 100mS for10Hz and above & 1Sec for 1Hzto 9.999Hz

Regards