I have a cheap multimeter that can measure frequency. IIRC it works fine up to 4MHz (the max I tried). Perhaps a better model would cover the range you need. My multimeter also has some sort of RS232 output that I have never used.
...R
I have a cheap multimeter that can measure frequency. IIRC it works fine up to 4MHz (the max I tried). Perhaps a better model would cover the range you need. My multimeter also has some sort of RS232 output that I have never used.
...R