Engineer Brian Beezley has updated his cross-correlation utility to measure the analog/digital time and level alignment of an HD Radio signal.
Using a few seconds of audio, the program calculates the delay between the transmitted analog and digital signal so that they can be adjusted. The program also calculates the Root Mean Square level difference between the analog and digital signals so any level error can be corrected as well.
The retired software and circuit designer with an interest in IBOC says this is a DOS utility that needs to be run from the command line.
Use the utility with any HD Radio receiver, such as a Sangean HDT-1X tuner, that provides split-audio mode. He says the updated program uses a more robust method for quickly calculating cross-correlation.
See his Web page for more information about the cross-correlation utility and the reasoning behind it.
