VITO Oscilloscope 1.1
the author of this app says:
This utility lets you record and analyze infrared signals from outer sources via PDA IR receiver. Record IR signals using your PocketPC, analyze the structure of signals, and save signals. You can change the duration (in milliseconds) of signal acquisition, perform preliminary analysis and define carrier frequency. The application lets you switch between scales to see the signal in detail.
The application works both on StrongARM SA11XX and XScale PXA250 processors.