|  | 1 | = Connectivity matrix with fixed attenuators = | 
          
            |  | 2 |  | 
          
            |  | 3 | Node 1-2 (ath0) and node 20-19 (ath1) were used for this experiment. Following is the connectivity pattern | 
          
            |  | 4 |  | 
          
            |  | 5 | == 30 dB attenuator at both ends == | 
          
            |  | 6 | || Mode || 30-30 || 30-0 || 0-30 || 0-0 || | 
          
            |  | 7 | || a || X || few bcns but no ping || few bcns but no ping || heard bcn and can ping || | 
          
            |  | 8 | || b/g || X || heard bcn and can ping || heard bcn and can ping || heard bcn and can ping || | 
          
            |  | 9 |  | 
          
            |  | 10 |  | 
          
            |  | 11 | == 20 dB attenuator at both ends == | 
          
            |  | 12 | || Mode || 20-20 || 20-0 || 0-20 || 0-0 || | 
          
            |  | 13 | || a || X || few bcns but no ping || heard bcn and can ping || heard bcn and can ping || | 
          
            |  | 14 | || b/g || heard bcn and can ping || heard bcn and can ping || heard bcn and can ping ||heard bcn and can ping  || |