521 East 3
rd
Street Mt. Vernon, NY 10553 • www.keydigital.com
Rev 1.1
– Jul, 2022
9
Forced HPD Switch
Troubleshooting tool to help overcome installation obstacles.
•
In cases of many connectivity layers or use with non-standard devices, hot plug detection (HPD) voltage
may be lost or drop below detectable levels and lead to a “no source connected” error message and/or
no image on the connected display.
•
If set to ON, Hot Plug Detection (HPD) voltage is fixed at the HDMI connection of the Rx unit. The
connected display will be fed a constant voltage to inform the device that a partner is always connected
and active.
•
If set to OFF, Hot Plug Detection (HPD) voltage is passed thru from connected source to the display
USB Service Port, Operate / FW Load Switch
Used for firmware updates only.
•
Ensure that the Firmware Mode switch is set to
Operate
on the Tx and Rx units for proper functionality.
•
Consult with Key Digital Technical Support (
) before upgrading firmrware.
•
USB to RS-232 interface required. Not included.
