This
thread at hifi-remote.com says the signals are MCE IR protocol, device 16.82. For example:
Power Function 12
0000 0073 0000 0020 0060 0020 0010 0010 0010 0010 0010 0020 0010 0020 0030 0020 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0020 0020 0020 0020 0010 0010 0020 0020 0010 0010 0010 0010 0010 0010 0020 0020 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0020 0010 0010 0020 0010 0010 0010 09CD
You can use
IrScrutinizer to generate all the Pronto Hex. Here are the other function numbers:
num_0 0
num_1 1
num_2 2
num_3 3
num_4 4
num_5 5
num_6 6
num_7 7
num_8 8
num_9 9
Power 12
Mute 13
Vol+ 16
Vol- 17
CH+ 32
CH- 33
ffwd 40
rewind 41
Play 48
Pause 48
Stop 49
Record 55
Teletext 60
Recordings 73
Subtitle 75
Menu 84
exit 85
up_arrow 88
down_arrow 89
left_arrow 90
right_arrow 91
Select 92
Red 109
Green 110
Yellow 111
Blue 112
Last_ch 187
Skip- 187
Skip+ 188
Guide 204
TV/Video 228
Audio 229
Radio 242
Vu+Duo and Vu+Solo use MCE 38.82 with similar function numbers.