[AFMUG] Cable loss question

[Jay Weekley]

We are going to experiment with some Purewave equipment that we have had 
for a while and one of our possible locations is on a water tank which 
means some of the LMR-400 to the sectors may be quite long. The loss 
calculator provided by Purewave shows that the loss on 60 feet of coax 
is 5.6 dB with Cable Run Efficiency of 31.6 %.   Is this acceptable?  I 
haven't worked with coax much but that seems like that's a big 
performance hit considering the loss on 6 feet is .7 dB and a cable run 
efficiency of 89.1 %.  What is the performance hit the actual signal 
strength at the on the actual wireless link?