Logitech Harmony 900 User Manual page 49

Inter-Device Delay
The Inter-Device Delay is the amount of time between commands for different devices when you
start an Activity. The Inter-Device Delay is also the time between the next sequence of commands
that are sent to other devices within an Activity.
Example: My DVD player doesn't always turn on when I start the Activity. I can get the DVD player
to turn on by using the Help button however I don't want to use Help every time.
Input Delay
The Input Delay is the amount of time that the remote takes when switching between inputs.
Many devices need a certain amount of time before changing to the next input in the input list.
Example: My TV doesn't always go to the correct input when switching between Activities and
I have already verified that the input list is correct.
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