ST-NMXC44A 48Gbps 4x4 HDMI™ Matrix

The 48Gbps 4x4 HDMI Matrix supports the transmission of high resolution video (up
to 4K2K@120Hz 4:4:4 12bit and 8K4K@60Hz 4:2:0 12bit) and multi-channel digital
audio from 4 HDMI sources to 4 HDMI displays. Resolution downscaling and HDR
conversion for each HDMI output are also supported.
It works with Blue-Ray players, Set-Top boxes, Home Theater PCs, and game
consoles which connect to an HDMI display, and can be controlled via front panel
buttons, IR remote, RS-232, and Web GUI.

Features

☆ HDCP2.3compliant
☆ 4×HDMI inputscan be independently routed to 4 × HDMI outputs
☆ Videoresolution is up to 8K60Hz 4:2:0, 8K30Hz 4:4:4 and 4K120Hz 4:4:4, as
     specified in HDMI 2.1
☆ Support48Gbps video bandwidth
☆ HDR,HDR10,HDR10+,Dolby Vision pass-through
☆ Support resolution downscaling and HDR conversion for each output port
☆ VRR,ALLM,QMS,QFT, SBTM aresupported
☆ Support optical audio and balanced analog audio output
☆ AdvancedEDIDmanagement
☆ Control via front panel buttons, IR remote, RS-232, and Web GUI

Package Contents

① 1×48Gbps4×4HDMIMatrix
② 1×24V/2.7ALocking Power Adapter
③ 1×IRRemote
④ 1×IRWidebandReceiver Cable (12V, 1.5m)
⑤ 1×ACPowerCord(1.5m)
⑥ 1×RS-232Serial Cable(1.5m, male to female head)
⑦ 4×5pin-3.81mmPhoenix Connector
⑧ 8×MachineScrew(KM3*6)
⑨ 2×MountingEar
⑩ 1×UserManual

 

Specifications

Parameter	Description
Video
HDMI Compliance	HDMI 2.1
HDCP Compliance	HDCP 2.3
Video Bandwidth	48 Gbps
Video Resolution	Up to 8K@60Hz 4:2:0, 8K@30Hz 4:4:4 and 4K@120Hz 4:4:4
Color Space	RGB 4:4:4, YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0
Color Depth	8/10/12-bit
HDR Formats	HDR, HDR10, HDR10+, Dolby Vision, HLG
Gaming Features	VRR, ALLM, QMS, QFT, SBTM supported
Video Latency	No Latency
Audio
HDMI Audio Formats	LPCM, Dolby Digital/Plus/EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Res, DTS-HD Master Audio, DSD
Optical Audio Output	LPCM 2.0CH / Dolby / DTS 5.1CH
Balanced Analog Audio Output	LPCM 2CH
Audio Latency	No Latency
Connection
Input Ports	4× HDMI INPUT (Type A, 19-pin female)
Output Ports	4× HDMI OUTPUT (Type A, 19-pin female), 4× Optical Audio (S/PDIF), 4× L/R Audio (5-pin 3.81mm Phoenix connector)
Control Ports	1× TCP/IP (RJ45), 1× RS-232 (D-Sub 9), 1× IR EXT (3.5mm Stereo Mini-jack)
Recommended HDMI Cable Length
8K	Up to 3 m / 9.8 ft — Ultra High Speed HDMI 2.1 cable required
4K@60Hz	Up to 5 m / 16 ft
4K@30Hz	Up to 10 m / 33 ft
1080P	Up to 15 m / 49 ft
Protection
ESD Protection	±8 kV (Air-gap discharge), ±4 kV (Contact discharge) — IEC 61000-4-2
Physical
Housing	Metal Enclosure — Black
Dimensions	440 × 203 × 44.5 mm (W × D × H) — 1U Rack Mount
Weight	2.65 kg
Power
Power Supply	Input: AC 100–240V 50/60Hz; Output: DC 24V/2.7A (US/EU standard, CE/FCC/UL certified)
Power Consumption	35 W (Max)
Environment
Operating Temperature	0°C – 40°C / 32°F – 104°F
Storage Temperature	-20°C – 60°C / -4°F – 140°F
Operating Humidity	20% – 80% RH (non-condensing)
Storage Humidity	10% – 90% RH (non-condensing)

Front Panel

 

 

No.	Name	Function Description
1	LCD Screen	Displays matrix switching status, input/output port, EDID, baud rate, IP address, etc.
2	PWR Indicator	Green: device is working normally. Red: device is on standby.
3	IR	IR signal receiver. Receives the signal from the IR remote.
4	INPUT / OUTPUT Buttons	Press an OUTPUT button (1~4) first, then press an INPUT button (1~4) to select the corresponding input source for the output port.
5	MENU / ENTER / UP / DOWN	Navigate the LCD menu. Example — RESET: Press MENU → select SETUP → press ENTER → select RESET → press ENTER to confirm. Press MENU at any time to return to the previous menu.
6	POWER Button	Long press for 1 second to enter standby mode. Short press to wake the device.
7	LOCK Button	Short press to lock front panel buttons (except POWER). Press again to unlock.

Rear Panel

 

 

No.	Name	Function Description
1	AUDIO OUT (1~4)	OPTICAL: Optical audio output port, connect to an audio output device such as an amplifier. L/R AUDIO: Analog audio output port supporting balanced/unbalanced output (max 2Vrms). Balanced: L+, L-, GND, R+, R-. Unbalanced: L+, GND, R+.
2	TCP/IP	TCP/IP control port. Connect to a PC or router with an RJ45 cable.
3	RS-232 Port	Connect to a PC or control system with a D-Sub 9-pin cable to transmit RS-232 commands.
4	IR EXT	If the IR receiver window is blocked or the unit is installed out of infrared line of sight, insert the IR receiver cable here to receive the IR remote signal.
5	HDMI INPUT Ports (1~4)	HDMI input ports. Connect to HDMI source devices (e.g. 8K PC, DVD, set-top box) with HDMI cables.
6	HDMI OUTPUT Ports (1~4)	HDMI output ports. Connect to HDMI display devices (e.g. TV, monitor) with HDMI cables.
7	DC 24V	Connect to the 24V/2.7A locking power adapter.
8	GND	Connect the housing to the ground.

IR Remote

 

 

Button	Function Description
① Power	Power on the Matrix or set it to standby mode.
② Output A — 1/2/3/4	Press 1, 2, 3 or 4 to select the corresponding input source for HDMI OUTPUT 1.
③ Output B — 1/2/3/4	Press 1, 2, 3 or 4 to select the corresponding input source for HDMI OUTPUT 2.
④ Output C — 1/2/3/4	Press 1, 2, 3 or 4 to select the corresponding input source for HDMI OUTPUT 3.
⑤ Output D — 1/2/3/4	Press 1, 2, 3 or 4 to select the corresponding input source for HDMI OUTPUT 4.
◄ / ► (per output)	Press to select the previous or next input source.

 

The first way: The IR window accepts the IR remote signal. Using the IR remote, the
furthest distance is 8 meters when the IR remote is directly faced to the matrix, and 5
meters when the using angle is ± 45°. The diagram is shown as below:

 

The second way: If the IR receiver window of the Matrix is blocked or the Matrix is
installed in a closed area out of infrared line of sight, the IR receiver cable can be
inserted to the “IR EXT” port to receive the IR remote signal. The furthest distance of
using the IR remote is 5 meters when the IRremote is directly faced to the IR receiver
head, and 3 meters when the using angle is ± 45°. The diagram is shown as below.

 

 IR Cable Pin Assignment

EDID Management

This Matrix has 36 factory defined EDID settings, 3 user-defined EDID modes and 4
copy EDID modes. You can select defined EDID mode or copy EDID mode to input
port through front panel buttons, RS-232 control or Web GUI.
On-panel button operation: On the initial LCD display screen, press “MENU”
button to enter the first level menu, press “UP/DOWN” button to select INPUT, and
then press the “ENTER” button. Now the EDID item appears. Press the “ENTER”
button, and then press “UP/DOWN” button to select the EDID mode you need. Then
press “ENTER” button to confirm this operation.

RS-232 Control Command

The product also supports RS-232 control. You need a serial cable with RS-232
male headandDB9transfer USB malehead.The RS-232headof theserialcable is
connected to the RS-232 control port with DB 9 at the rear of the Matrix, and the USB
head of the serial cable is connected to a PC. The connection method is as follows:

Application Example