Help-CRO picks up FM signal without any connection

Discussion in 'Wireless & RF Design' started by kavin6, Jan 23, 2009.

  1. kavin6

    Thread Starter Member

    Jan 2, 2009
    16
    0
    I am doing a Wireless ECG. I get the ECG signal and I transmit it via FM. Once I input the ecg signal to the FM transmitter input the CRO automatically displays frequencies in MHz range even without any link/connection from the circuit to the CRO. What could be wrong?
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    You've discovered radio.:D

    Does the trace go away when you hook the ground clip to receiver circuit ground?
     
  3. kavin6

    Thread Starter Member

    Jan 2, 2009
    16
    0
    The trace goes away when I remove the ground connection from the Fm transmitter and comes only when I connect the ground clip back to the transmitter ground! I am using a Transcend MP3 player as the FM receiver.
     
Loading...