For the SPG422+ what is the timing relationship is between the serial digital audio output and the embedded audio in the serial digital video output?

For the SPG422+ what is the timing relationship is between the serial digital audio output and the embedded audio in the serial digital video output?

Our engineers have noted that there is no firm or predictable timing relationship in the present architecture. The two audio paths are created independently of each other within the generator. In addition, the Serial Digital Video output can be offset in time using front panel controls, thereby making the question (or the operational problem) a little larger.