The manufacture will not provide the information, so I am trying to reverse engineer the RS232 code/protocol. I have a windows program that communicates with an amplifier through a com port. Using a port monitor I obtained the following:
Send#Receive#Initial Volume#result volume
254 2 0 240 0 97 0 0 0 1 25 247 240 0 97 0 4 0 1 29 247#240 127 97 0 0 0 1 120 247 240 127 97 0 4 0 1 116 247#0#-0.1
254 2 0 240 0 97 0 0 0 2 28 247 240 0 97 0 4 0 2 32 247#240 127 97 0 0 0 2 117 247 240 127 97 0 4 0 2 113 247#-0.1#-0.2
254 2 0 240 0 97 0 0 0 3 27 247 240 0 97 0 4 0 3 31 247#240 127 97 0 0 0 3 118 247 240 127 97 0 4 0 3 114 247 #-0.2#-0.3
254 2 0 240 0 97 0 0 0 4 30 247 240 0 97 0 4 0 4 26 247#240 127 97 0 0 0 4 115 247 240 127 97 0 4 0 4 119 247#-0.3#-0.4
254 2 0 240 0 97 0 0 7 103 122 247 240 0 97 0 4 7 103 126 247#240 127 97 0 0 7 103 23 247 240 127 97 0 4 7 103 19 247#-100#-99.9
254 2 0 240 0 97 0 0 7 102 121 247 240 0 97 0 4 7 102 125 247#240 127 97 0 0 7 102 24 247 240 127 97 0 4 7 102 20 247 #-99.9#-99.8

but I can't figure out what is going on.... I've used decimal vs. hex, because I thought it would be easier to read and I have delimited the results with # sign's...