fl2k output voltage level changes every few seconds

Ioannis Makris makrisj at gmail.com
Wed May 8 12:12:09 UTC 2019


While this is truly unexpected behaviour, please understand that the device
was designed for a termination load of 75+j0 ohms (that's what all
video/VGA analog signals require to be present at the load side) so any
other load impedance value is untested at factory.
I have independently tested that shorting the output to the ground causes
an instant halt to the output of the plain VGA dongle, so there might be
some protection circuit. Also, the VGA circuit has 150 ohms termination
loads.
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