Black Box TV Video Accessories 2 x 1 and 4 x 1 HDMI Video Switches User Manual
Page 19
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AVSW-HDMI2X1A
Chapter 4: Operation
1
23
4
5
1
9
6
200 ±20 mm
3.5
DC 2.5
DB9 F
Pinout
DC 2.5
DB9 F
1 ————————— 3
2 ————————— 2
3 ————————— 8
4 ————————— 5
———— S
Figure 4-5. DB9 to 2.5-mm cable pinout.
4.4 Function Button (AVSW-HDMI4X1A Only)
The Function button adjusts the optimal video signal strength corresponding to
the length or quality of DVI cable.
the length or quality of DVI cable.
To adjust the video signal strength, follow these steps:
1. Press the Function button three times.
2. Press push button #1 one or two times to adjust the selected port’s input video
strength. One beep = normal or two beeps = enhance.
or
Press push button #3 one or two times to adjust the selected port’s output
current. One beep = normal or two beeps = enhance.
or
Press push button #4 one, two, three, or four times to adjust the selected
port’s output emphasis. One beep = no pre-emphasis, two beeps = low pre-
emphasis, three beeps = medium pre-emphasis, or four beeps = high pre-
emphasis.
emphasis, three beeps = medium pre-emphasis, or four beeps = high pre-
emphasis.
3. Once the setting is finished, press the Function button one time to exit the
setting.