My P3 always matched S meter signal level to the K3. This morning with the S0 on the K3 ( with antenna disconnected) the P3 is displaying a level about 7 db below the S0 level. With antenna connected the K3 shows S7 while the P3 level on the screen is slightly below S0. What happened and how do I fix this? 73, Bud W3LL w3ll at arrl.net