Connectivity matrix with fixed attenuators
Node 1-2 (ath0) and node 20-19 (ath1) were used for this experiment. Following is the connectivity pattern
 ath0 is opposite the power supply looking at the back side of the node 
30 dB attenuator at both ends
| Mode | 30-30 | 30-0 | 0-30 | 0-0 | 
| a | X | few bcns but no ping | few bcns but no ping | heard bcn and can ping | 
| b/g | X | heard bcn and can ping | heard bcn and can ping | heard bcn and can ping | 
20 dB attenuator at both ends
| Mode | 20-20 | 20-0 | 0-20 | 0-0 | 
| a | X | few bcns but no ping | heard bcn and can ping | heard bcn and can ping | 
| b/g | heard bcn and can ping | heard bcn and can ping | heard bcn and can ping | heard bcn and can ping |