HDTV Supply Sewell Spider MX0402-321 Operating Instructions Manual page 11

3. IR extender control.
User can use the IR receiver cable to change the IR receiver position.
If controlling the matrix through the 1/8" (3.5 mm) input jack on the rear panel,
connect the IR cable directly to the matrix rear IR receiver extension sockets.
4. IR call back system to control the source device.
The matrix can not only extender the HDMI signal to HDMI receiver which is in
remote rooms, but also can pass the IR signal through the IR call back system
to the HDMI source.
7 | P a g e