StarTech.com ST121UTPHDEU - Manual (Page 7)

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7. If Step 2 previously performed, connect and position the IR emitter/
receiver probes appropriately from the Receiver unit.
8. If Step 3 previously performed, connect a male DB9 serial cable from the
Receiver unit to the RS232 serial device. The male pinout on the DB9
connector is identical to that of the pinout on the male cable plugged into
the Transmitter unit.
9. Turn the extender units on by plugging in the power adapters. The
power LED should light up and stay solid. The Link LED on the RJ45
connector will light up to indicate a proper connection.
10. Turn on the display device and make sure it’s set to the HDMI input.
11. Turn on video source device. The video output should appear on the
display on the Receiver unit.
Driver Installation
No driver or software installation is required.