SY SY-MS42-18G User manual

SY Electronics Ltd., 7 Worrall Street, Manchester, M5 4TH, United Kingdom
Tel: [phone] – Web: sy.uk
User Manual
SY-MS42-18G
4x2 HDMI 2.0 18G Matrix Switcher
4K60 4:4:4 HDMI Switcher with Scalable Outputs
and Display control

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CONTENTS
FEATURES 4
PANEL DESCRIPTION 4
Front Panel 4
Rear Panel 4
CONNECTING TO THE SY-MS42-18G 5
USING THE SY-MS42-18G 5
Power LED and Standby Mode 5
Auto LED and Button 5
Selecting Inputs 5
RS232 AND LAN CONTROL 7
Input Control Commands 7
Making Video Selections 7
Using the Preset Memories 7
Auto Switch Enable/Disable 8
Output Control Commands 8
Setting the Output Scaler 8
Video Output Enable/Disable 9
Output HDCP Control 9
Output ARC Control 9
Mute/Unmute the S/PDIF Outputs 10
Using the Test Pattern Mode 10
EDID Management 11
Setting the Input EDID Mode 11
System Commands 12
Reading System Information 12
Network Commands 13
Sending Display CEC Commands 14
Sending Display RS232 Commands 14
Auto Power Options 15
USING THE BUILT-IN WEB INTERFACE 16
Status Page 17

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Switch Page 18
Input Page 18
Output Page 19
Network Page 20
System Page 20
Control Page 21
RS232 Setting 1 and RS232 Setting 2 21
IR Setting 1 and IR Setting 2 22
PACKAGE CONTENTS 22
SPECIFICATIONS 23
Video 23
Audio 23
General 23
Environmental 23
Physical 23
Safety Instructions 24
After Sales Service 24

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The SY-MS42-18G is an 18G HDMI video switcher with 4 HDMI inputs and 2 scaling HDMI
outputs. Each input and output supports up to 4K60 444 HDMI 18G video. The outputs can be
individually scaled for 1080p or HDBaseT compatibility. De-embedded audio as analogue L+R
and optical TosLink is available for both outputs. The SY-MS42-18G can automatically control
the display device using RS232, CEC or IR when the last input signal is lost, or when the first
video input is detected. This switcher can be controlled from the front panel, RS232, IR, or LAN.
Features
Four 18G HDMI 2.0 video inputs supporting up to 4K60 444 resolution
Two 18G HDMI 2.0 video outputs supporting up to 4K60 444 resolution
Both outputs can be individually scaled for 4K  1080p or HDBaseT mode
Four methods of control: Front panel, RS232, IR and LAN
Automatic RS232, CEC and IR control of the display device power state
Two sets of de-embedded audio analogue and TosLink outputs, for both outputs
ARC decoding to the TosLink audio outputs only.
Test Pattern mode for testing output signal integrity to the display
Built-in WebGUI for LAN control
12V 1A DC PSU
Panel Description
Front Panel
Name
Description
POWER LED
Blue LED indicates that the unit is powered
Red LED indicates that the unit is in standby mode
IR Sensor
IR input for remote control of the switcher
Out A /Out B
LED and button for each output
LED 1 to LED 4
Indicates the input selected for the respective output
AUTO LED
Green when Auto Detection mode is enabled
Push Button
Press to select the desired input
Hold down to toggle the Auto Detection mode
Rear Panel

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Name
Description
LAN RJ45
Control port for LAN control or accessing the built-in WebGUI
RS232
3-way pluggable connector for RS232 control of the SY-MS42-18G
IR IN
IR Eye input for IR control of the SY-MS42-18G
RS232-A / RS232-B
3-way pluggable connectors for RS232 of the display devices
IR OUT A / IR OUT B
3-way pluggable connectors for RS232 of the display devices
Optical Audio Output A
TosLink connector for optical audio from HDMI Output A
L / R Audio Output A
3-way pluggable connector for stereo audio from HDMI Output A
Optical Audio Output B
TosLink connector for optical audio from HDMI Output B
L / R Audio Output B
3-way pluggable connector for stereo audio from HDMI Output B
Earthing Point
Screw terminal for earthing the SY-MS42-18G
HDMI Inputs 1 to 4
HDMI Source inputs 1 to 4
Display Outputs A and B
HDMI outputs for displays A and B
12V DC IN
12V DC input for 12V 1A PSU
Connecting to the SY-MS42-18G
1. Connect the desired HDMI input sources.
2. Connect the desired HDMI display devices.
3. Connect any CONTROL inputs that may be required: LAN, RS232, or IR IN
4. Connect any Display control port: RS232-A, RS232-B, IR OUT A or IR OUT B
5. Connect any audio devices to either the Optical or L+R outputs
6. Connect the 12V DC PSU
Using the SY-MS42-18G
Power LED and Standby Mode
The Power LED provides the following indications:
Colour
Description
Blue
The SY-MS42-18G is active and fully controllable
Red
The SY-MS42-18G is in standby mode, this state can be changed by using
RS232 or LAN commands, or from the WebGUI interface
Auto LED and Button
The green AUTO LED for both outputs A and B is lit when that channel has its Auto Detection
mode active. Auto Detection mode will detect any new HDMI signals and immediate switch to
the input. If the currently selected input is removed then the switcher will switch to the next
available input, or remain on the current input if there are no active HDMI input signals.
The change the Auto Detection mode, press and hold the button for that channel for 3 seconds
until the Auto LED changes state.
Selecting Inputs
Manual Selection of the inputs is done by briefly pressing the push button repeatedly for that
channel until the desired input is selected. Manual selection is always possible, irrespective of
the Auto LED state. Selected inputs that have no signal will be indicated by a flashing LED.

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Figure 1 - SY-MS42-18G Configuration Example

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RS232 and LAN Control
The SY-MS42-18G can be controlled using RS232 the following settings:
Baudrate: 57600
Data bits: 8
Parity: None
Stop bits: 1
Each of the following commands can also be sent to the IP address of the LAN port using the
either of the following port settings:
TCP/IP Port: 8000
Telnet Port: 23
Important:
1. All messages sent to the SY-MS42-18G must be terminated with an exclamation mark (!).
Any carriage return that is present after the end of the command will be ignored.
2. All spaces shown in the commands are required.
3. All response messages are terminated by a CR/LF sequence.
4. When all four inputs are requested by the same command, the response will report each
input on a separate line.
5. When both outputs are requested by the same command, the response will report each
output on a separate line.
Input Control Commands
Making Video Selections
The following command allows the direct selection of any input to either or both outputs.
The read command returns the input that is currently displayed on the either or both outputs.
Set Command:
s in x av out y!
Read Command:
r av out y!
Responses:
input x -> output y
Where:
x is the input number, 1 to 4 for inputs 1 to 4
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only.
Using the Preset Memories
The SY-MS44-18G has four preset memory locations that may be used to store and recall specific
switcher modes and video routings.
Save Command:
s save preset z!
Recall Command:
s recall preset z!
Responses:
save preset z
recall preset z
Where:
z is the preset memory number from 1 to 4

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Auto Switch Enable/Disable
This command enables or disable the auto switch mode for either or both outputs. This mode is
identical to using either of the AUTO front panel buttons.
Set Command:
s hdmi y autoswitch z!
Read Command:
r hdmi y autoswitch!
Responses:
hdmi y autoswitch z
Where:
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only
z is the enable/disable setting:
0 = Disable
1 = Enable
The stored settings for any of the four presets can be examined using the following command.
Read Command:
r preset z!
Responses:
The response to this command contains the following information:
Video routing
Audio routing
Input EDID settings
Output Scaler settings
Output HDCP settings
Output Control Commands
Setting the Output Scaler
The output may be scaled to best match the output signal to the display device. When HDBaseT
extenders are being used on an output, the HDBaseT scaling mode will ensure compatibility by
limiting the maximum TMDS speed to no more than 10.2Gbps.
Set Command:
s hdmi y scaler z!
Read Command:
r hdmi y scaler!
Responses:
hdmi output y set to bypass mode
hdmi output y set to 4K -> 1080p
hdmi output y set to HDBT mode
hdmi output y set to auto mode
Where:
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only
z is the scaler setting, 1 to 4:
1 = Bypass (no scaling)
2 = 4k  1080p
3 = HDBaseT Mode
4 = Auto

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Video Output Enable/Disable
The HDMI output stream may be enabled or disabled as required.
Set Command:
s hdmi y stream z!
Read Command:
r hdmi y stream!
Responses:
enable hdmi output stream y
disable hdmi output stream y
Where:
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only.
z is the enable/disable setting:
0 = Disable (no HDMI output)
1 = Enable (HDMI is output)
Output HDCP Control
The HDCP setting of the outputs can be set using this command.
Set Command:
s hdmi y hdcp z!
Read Command:
r hdmi y hdcp!
Responses:
hdmi out y hdcp off
hdmi out y hdcp follow sink
hdmi out y hdcp follow source
Where:
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only.
z is the HDCP mode setting, 0 to 2:
0 = HDCP off
1 = Follow sink (use the HDCP setting of the display)
2 = Follow source (output has same HDCP setting as input)
Output ARC Control
The HDMI outputs can be set to decode the Audio Return Channel (ARC) from the display device
to the analogue audio outputs.
Set Command:
s hdmi y arc z!
Read Command:
r hdmi y arc!
Responses:
hdmi y arc on
hdmi y arc off
Where:
y is the output number, 0 to 2:
0 = Both outputs,
1 = Out A only
2 = Out B only.
z is the ARC mode setting:
0 = ARC off (de-embed HDMI)
1 = ARC on (decode ARC)

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Mute/Unmute the S/PDIF Outputs
The SY-MS42-18G has two S/PDIF (TosLink) outputs for outputs A and B respectively. This can be
selectively muted or unmuted.
Set Command:
s spdif x mute y!
Read Command:
r spdif x mute!
Responses:
spdif x mute
spdif x unmute
Where:
y is the output number, 0 to 2:
1 = S/PDIF output A only
2 = S/PDIF output B only.
y is the S/PDIF mute setting:
0 = Unmute
1 = Mute
Using the Test Pattern Mode
The outputs can be used as simple test pattern generators for checking the HDMI signal to the
displays when there are no other source signals available.
Two commands are required to fully enable the test pattern output:
1. Select the desired test pattern
2. Enable the test pattern mode on the output/s
Only one command is needed to turn off the test pattern mode.
If you need to change the test pattern, do the following:
1. Select the new test pattern
2. Turn off the test pattern mode
3. Turn the test pattern mode back on
Selecting the Test Pattern
Set Command:
s pattern mode z!
Responses:
set pattern Checkerboard
set pattern White
set pattern Red
set pattern Green
set pattern Blue
set pattern Black
Where:
z is the test pattern setting:
1 = Select Checkerboard test pattern
2 = Select White test pattern
3 = Select Red test pattern
4 = Select Green test pattern
5 = Select Blue test pattern
6 = Select Black test pattern