6
Connection with Computer
• When the switcher connects to the COM1 or COM2 of the computer with control software, users can
control it by that computer
• To control the switcher, users may use the public COM software Please refer the details in Communi
cation Protocol and Command Codes
PIN Function
Pin
Function
1 T M D S Data2-
13
T M D S Data3+
2 T M D S Data2+
14
+5V Power
3 T M D S Data 2/4 Shield 15
Ground (for +5V)
4 T M D S Data 4- 16
Hot Plug Detect
5 T M D S Data 4+
17
T M D S Data 0
6 DDC Clock
18
T M D S Data 0+
7 DDC Data
19
T M D S Data 0/5 Shield
8 No Connect
20
T M D S Data 5
9 T M D S Data1-
21
T M D S Data 5
10 T M D S Data1+
22
T M D S Clock Shield
11 T M D S Data1/3 Shield
23
T M D S Clock +
12 T M D S Data3¬-
24
T M D S Clock
Audio Signal Connection:
• “AUDIO INPUT”, “AUDIO OUTPUTS” audio network interface in HDMI matrix switchers can
be connected to the audio signal and amplify of the DVD player
• Audio connection is little complicated than video It has two kinds of connection: balanced and
unbalanced
• The balanced connection transmits a pair of balanced signals with two signal cords Because interfer-
ences will have the same intensity and the opposite phases on the two signal cords, it will be counter-
acted in the end For the low frequency extent of the audio signal, it would be easily interfered under
long distance transmission Therefore, as an anti-interference connection, it is mostly used in audio
connection of special device
• The unbalanced connection transmits signals only with a signal cord Without counteraction, it can
be interfered more easily Accordingly, it is adopted for household appliance or some cases with low
technical demand
• Take the audio signal line for example: 1 Unbalanced: pin “G” connect to SLEEVE, pin “+” connect
to TIP, pin “–” connect to pin “G”; 2 Balanced: pin “G” connect to SLEEVE, pin “–” connect to
RING, pin “+” connect to TIP As shown in the F 5-3:
Unbalanced Input
Tip
Tip
Sleeve
Balanced Input
Tip
Ring
Tip
Ring
Unbalanced Output
Tip
Tip
Sleeve
Sleeves
Sleeves
Balanced Output
Tip
Ring
Tip
Ring
Sleeves
