Extron electronic DVI DA4 - Manual (Page 23)

DVI DA2 and DVI DA4 • Installation and Operation 2-11
Operation
1 . Connect the power supply (see page 2-10).
2 . Connect and power on the local monitor (see page 2-8).
3 . Connect and power on any other output displays (see
page 2-8).
4 . Connect and power on the source device (see page 2-8).
N Output 1 (Local Monitor) is used as a DDC reference
and must be connected to the distribution amplifier
before the source device is powered on. If the source
device cannot communicate with the local monitor when
it is being powered on, it may not be able to send a video
signal or the signal may have the wrong resolution or
refresh rate.