I have also been trying to create a config file for the Motorola VIP 1200 STB used by AT&T for U-verse service. Looking at the raw code using mode2 it seems like the RCMM protocol but the lengths for the pulses and spaces are different then described
at http://www.sbprojects.com/knowledge/ir/rcmm.htm, it seems like spaces with the length 150-200=00, 300-400=01,500-550=10 and 650-700=11.It also looks like it has 32bits.
 
I have also see that the numbers in the code will vary about 100 microseconds from one sample of the same button to anotherer sample(as shown belowwith button two).
Is this normal or does this indicate the receiver is set to the wrong carrier frequency? How can I change the carrier frequency of the receiver for use with the mode2 command? I know it can be changed in /etc/lircd.conf but that is loaded by lircd and mode2 does not need lircd.
 
"name 2
500 100 350 100 350 500
250 100 350 650 300 300
300 100 350 100 350 100
300 500 300 500 250 350
250 550 250 150 300 150
250 200 250 550 250"
 
"name 2
550 50 350 100 350 500
300 100 300 700 250 350
250 150 300 100 350 100
350 500 250 500 300 300
300 500 250 150 300 150
300 150 300 500 250"