thats the best i got
1. pc, lappy, netbook if used, the three prong male plug must be earth grounded.
2. shielding was reinforced with copper shielding.
3. fluke 100mhz scope was used.
4. signal gen must also be earth grounded as provided by the instrument.
5. mpu was reinforced with heatsink.
6. software was upgraded to the latest version.
thanks mga sistah for enlightening me about the grounding. ( red bull sa inyo