I've modded my transmitter and receiver. While checking the antenna on the transmitter with my multimeter, I noticed that the antenna contact on the board is grounded with the case (meaning when set to continuity, touching one probe to the antenna connection point on the circuit board and the other probe to the case, it registers a connection). For the life of me, I can't see any stray blobs of solder. Is the transmitter antenna supposed to be grounded?