Ok. I have posted a question on the Mediaportal forum about the toggle bit handling, btw. In addition, I have contacted Pace and asked them to provide me the Hex code of the system.

I have to add that we talk about the TV3 blaster component of Mediaportal's IR Server suite here which has to blast the command on the server rather than about plain Mediaportal. My link above points to the wiki which shows that I could send different commands after each other using macros or that I could send a pre-change command to achieve what we need to.

Meanwhile, I have installed Girder on my system because I vaguely remembered from earlier times that it is possible to register odd and even commands with the USBUIRT. Registering the "1" button gave me the following result: 

IR Code (even)

0000 006F 0000 0024 000F 000B 0006 000B 0006 0017 0006 000B 0006 000B 0006 001D 0006 000B 0006 000B 0006 000B 0006 0017 0006 0017 0006 0011 0006 0017 0006 000B 0006 000B 0006 000B 0006 0011 0006 0D22 000F 000B 0006 000B 0006 0017 0006 000B 0006 000B 0006 001D 0006 000B 0006 000B 0006 000B 0006 0017 0006 0017 0006 0011 0006 0017 0006 000B 0006 000B 0006 000B 0006 0011 0006 0D0E

IR Code (odd)

0000 0072 0000 0024 000F 000B 0006 000B 0006 0017 0006 000B 0006 000B 0006 001D 0006 000B 0006 000B 0006 000B 0006 0017 0006 0017 0006 0011 0006 0017 0006 000B 0006 000B 0006 000B 0006 0011 0006 0CF0 000F 000B 0006 000B 0006 0017 0006 000B 0006 000B 0006 001D 0006 000B 0006 000B 0006 000B 0006 0017 0006 0017 0006 0011 0006 0017 0006 000B 0006 000B 0006 000B 0006 0011 0006 0CCA

Is this helpful? And if yes, how could I proceed?