John,
That signal is output when a channel of the TIU is first powered, and it last around 7-8 seconds
Just to be clear...
The watchdog signal issued every time that the voltage at the output of a TIU channel changes from 0 to any other value, and it is present for 5 seconds effective with DCS 4.0 or later.
Prior to DCS 4.0 it was only present for 1/2 second.
This and a whole lot more is all in “The DCS Companion 3rd Edition!" This book is available from many fine OGR advertisers and forum sponsors, or as an eBook or a printed book at OGR’s web store! |