Page. 78 of 87
A note about the DTR-link behaviour.
Even thought this circuit seems to work correctly when driven by software, it could
cause unexpected switching-on of a connected linear amplifier having its rear panel's
mains-switch enabled, when the linked PC re-boots or when an external serial device
(e.g. a USB to serial adaptor...) is physically connected.
The reason for this odd behaviour is related to some uncontrolled OFF-to-ON transitions
of a DTR output line.
So, please, take this unpleasant side effect into account when using this kind of branch
in external links.
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