Question What is the Magnetic Signature of the MFAM Module?

The MFAM Module is slightly magnetic.  That it is why it is separated from the MFAM sensors by the 20 inch flex circuit.  If the MFAM module is brought closer to the sensors this is what will be the effect on the measurement (peak to peak) as the MFAM module is rotated in all orientations by a stationary sensor:

24 inches: < 0.25 nTpp 

12 inches: 1.5 nTpp 

6 inches: 7.0 nTpp 

3 inches: 50 nTpp 

Note that these measurements were made using another magnetometer on a special magnetic signature measuring table to measure the MFAM module signatures at the specified distances.  That is how we were able to measure the signature at 24 inches while the MFAM module to MFAM sensors distance is only 20 inches.