Other issues that can cause IR Communication

Below is some more information from the engineering team on IR communications. 

Other issues that can cause IR com issues. 

The host relies on the USB supply voltage to function correctly, if the voltage drop across the cable is sufficient (caused by damaged cables or extremely long cable) can result in com issues. Or a computer with a lower-than-normal USB supply voltage… we’ve seen this mainly with laptop when being used on battery power.

Loggers should not be read (hot/cold) in the interface until they approach ambient temp.

MPIII loggers - Diode alignment within the housing, during battery replacement boards can sometimes move out of alignment with the window, this can be seen by looking through the windows and the IR diodes should be centered.  If they migrated out of center this can result in communication issues.

IR com diagnostics can be useful to find dead spots in the Host array of diodes, also provides a visual aid in seeing the com between the host and logger.