diff --git a/afsk/main.c b/afsk/main.c
index 327a720d..f54be6c5 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -1477,8 +1477,8 @@ void get_tlm_fox() {
     }
     
     if (mode == BPSK) {  // WOD field experiments
-      encodeA(b, 63 + head_offset, 0xfff);  
-      encodeB(b, 75 + head_offset, 0xff);	
+      encodeA(b, 63 + head_offset, 0xff);  
+      encodeB(b, 74 + head_offset, 0xff);	
     }
     short int data10[headerLen + rsFrames * (rsFrameLen + parityLen)];
     short int data8[headerLen + rsFrames * (rsFrameLen + parityLen)];