DUX-TX-70 - Audiovisual Equipment AMX - Free user manual and instructions

Product Type	HDMI Extender Kit (Transmitter + Receiver)
Model	AMX DUX-TX-70 / DUX-RX-70
Dimensions (W × H × D)	173 mm × 18 mm × 94.8 mm (6.84" × 0.71" × 3.75") per unit
Weight	400 g per unit
Power Supply	12 VDC, 1.5 A (adapter included)
Power Consumption	≤11.8 W (pair)
Video Standard	HDMI 1.4, compatible with HDMI 2.0 (4K@60Hz 4:2:0), HDCP 2.2
Maximum Resolution	4K@30Hz (over 40 m) / 1080p@60Hz (over 70 m)
Transmission Distance	Up to 70 m (230 ft) for 1080p, 40 m (131 ft) for 4K over single CatX cable
Cable Type	Cat5e/6/6a/7 (T568B straight-through recommended)
IR Control	Bi-directional IR pass-through (source or display location)
RS232	Pass-through for serial communication and firmware upgrade
PoE	Yes (DUX-TX-70 powers DUX-RX-70 over CatX)
Operating Temperature	32°F to 113°F (0°C to 45°C)
Storage Temperature	-4°F to 140°F (-20°C to 70°C)
ESD Protection	±8 kV air-gap discharge, ±4 kV contact discharge
Certification	CE, FCC
Cleaning	Use only a dry cloth; do not use liquids
Safety	Do not expose to rain, moisture, or heat sources; ensure ventilation
Repair	Refer all servicing to qualified service personnel

Frequently Asked Questions - DUX-TX-70 AMX

What is the maximum transmission distance of the DUX-TX-70?

The maximum transmission distance depends on resolution: up to 70 meters (230 ft) for 1080p and up to 40 meters (131 ft) for 4K@30Hz using a single CatX cable.

Does the DUX-TX-70 support Power over Ethernet (PoE)?

Yes, the DUX-TX-70 can power the DUX-RX-70 via PoE over the CatX cable. Only one power supply (connected to the DUX-TX-70) is needed, but both units can also be powered individually.

What type of HDMI cable should I use?

For 1080p signals, HDMI input and output cables can be up to 15 meters. For 4K@30Hz, the HDMI input cable should be less than 10 meters and the HDMI output cable less than 15 meters. Use high-quality HDMI cables.

How do I control the display from the source location?

Connect a broadband IR receiver to the IR IN port of the DUX-TX-70 and an IR emitter to the IR OUT port of the DUX-RX-70. Then use the display's remote control from the source location.

What should I do if the POWER LED is off?

Check that all devices are powered on and that the power adapter is properly connected. Ensure the power cord is not damaged and the outlet is working.

Why is my LINK LED off or blinking?

Ensure all devices are on and cables are properly connected. Verify that the CatX cable length does not exceed the maximum (70 m for 1080p, 40 m for 4K) and that the cable is of good quality (Cat5e or higher, T568B wiring).

How do I upgrade the firmware?

Set the MODE switch to UPDATE, connect a PC to the RS232 port using an RS232 cable, and run the firmware upgrade software (contact manufacturer for the software). After successful upgrade, power cycle the device. Upgrading must be done individually for transmitter and receiver.

Can I use RS232 for serial communication?

Yes. Connect RS232 devices to the RS232 ports of both DUX-TX-70 and DUX-RX-70. Set MODE to NORMAL, and connect them via a CatX cable. Serial communication between the devices is then possible.

What should I do if the display shows no picture?

Check the LINK LED is steady on; if not, refer to LINK LED troubleshooting. Ensure the display is powered on, the correct input is selected, and the source device is outputting a signal. Also verify HDCP compatibility and cable lengths.

How do I clean the DUX-TX-70?

Use only a dry cloth to clean the device. Do not use any liquids, sprays, or solvents. Unplug the unit before cleaning.

USER MANUAL DUX-TX-70 AMX

Important Safety Instructions 03

Introduction....04

Features....04

Packing List....05

Specifications....06

DUX-TX-70 Transmitter 06

DUX-RX-70 Receiver 07

Cable Specifications 07

Panel 08

DUX-TX-70 Transmitter 08

DUX-RX-70 Receiver....10

Install Hardware....12

Operate with IR 14

Control the Display....14

Control the Source ....15

Operate with RS232....16

RS232 Pinout....16

RS232 for Firmware Upgrading....16

RS232 for Serial Communication....17

Troubleshooting ....18

Important Safety Instructions

NOTE:

We reserve the right to change the content from time to time without notice.

WARNINGS:

To reduce the risk of fire, electric shock or product damage, please observe the following Safety Instructions while installing and operating the product:

Do not expose this apparatus to rain, moisture, dripping or splashing. No objects filled with liquids, such as vases, shall be placed on the apparatus.

Do not install or place this unit in a bookcase, built-in cabinet or in another confined space. Ensure the unit is well ventilated.

To prevent risk of electric shock or fire hazard due to overheating, do not obstruct the unit's ventilation openings with newspapers, tablecloths, curtains, and similar items.

Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

Do not place sources of naked flames, such as lighted candles, on the unit.

Clean this apparatus only with dry cloth.

Unplug this apparatus during lightning storms or when unused for long periods of time.

Protect the power cord from being walked on or pinched particularly at plugs.

Only use attachments/accessories specified by the manufacturer.

Refer all servicing to qualified service personnel.

Introduction

DUX-TX-70 Transmitter and DUX-RX-70 Receiver are a pair of HDMI extenders used to extend HDMI signals up to 70 meters / 230ft (1080p) or 40 meters/131ft (4K@30Hz) over a single CatX cable.

Through PoE, one power supply to DUX-TX-70 will be able to power both DUX-TX-70 and DUX-RX-70. Via IR pass-through, you can either control the source from the display location or the display from the source location. The two HDMI extenders allow RS232 control via pass-through over a CatX cable.

The DUX-TX-70 and DUX-RX-70 HDMI extenders are ideal for applications at homes, offices, digital entertainment centers, control centers, conference rooms, schools and corporate training spaces, where a long-distance HDMI signal distribution is needed.

Features

• Slim appearance, space saving and easy-to-install.
• For 1080p signal, supports HDMI input and output cables up to 15 meters.
• For 4k@30Hz signal, supports HDMI input cable up to 10 meters and HDMI output cable up to 15 meters.
• HD signal transmission up to 70 meters / 230ft (1080p) or 40 meters / 131ft (4K@30Hz) via a single CatX cable.
• Single CatX cable solution, including transmission of HD Audio/Video, IR control, RS232 pass-through, and PoE (DUX-TX-70 to DUX-RX-70).
• Fully compliant with HDMI 1.4, and compatible with HDMI 2.0 (4K@60Hz 4:2:0).
  • HDCP 2.2 compliant.
• Bi-directional IR control from source or display location.
  • RS232 port for firmware upgrading and serial communication.
• Universal power supply of high reliability and energy efficiency for reduced operation cost.

NOTE: The actual signal transmission distance depends on signal resolution and cable quality.

Packing List

DUX-TX-70 Transmitter

• 1 x DUX-TX-70 Transmitter
• 1 x Power Adapter (12 VDC,1.5A)
• 1 x Phoenix Male Connector (3.5 mm, 3 pins)
- 1 x IR Emitter
• 1 x Broadband IR Receiver (30 KHz \~ 50 KHz)
• 2 x Mounting Brackets
• 1 x User Manual

DUX-RX-70 Receiver

• 1 x DUX-RX-70 Receiver
• 1 x Power Adapter (12 VDC,1.5A)
• 1 x Phoenix Male Connector (3.5 mm, 3 pins)
- 1 x IR Emitter
• 1 x Broadband IR Receiver (30 KHz \~ 50 KHz)
- 2 x Mounting Brackets
• 1 x User Manual

Specifications - DUX-TX-70 Transmitter

Technical
Input 1 x HDMI IN
Input Signal Type TMDS
Input Resolution Support 4K, 1080p, 1080i, 720p, 576p, 480p, 576i, 480i
Input Video Level 0.5-1.2 V p-p
Input DDC Signal 5 V p-p
Output 1 x HDBT OUT
Output Signal Type HDBT
Output Resolution Support 4K, 1080p, 1080i, 720p, 576p, 480p, 576i, 480i
Video Impedance 100 Ω
Maximum Pixel Clock 297 MHz
General
Operating Temperature / RH 32°F	~ 113°F (0°C ~ 45°C) / 10% ~ 90%, non-condensing
Storage Temperature / RH -4°F ~	140°F (-20°C ~ 70°C) / 10% ~ 90%, non-condensing
Power Supply 12 VDC 1.5A
Power Consumption ≤11.8 W (pair)
ESD Protection	Human-body model:±8 kV (Air-gap discharge)±4 kV (Contact discharge)
Surge Protection Voltage: ±1 kV
Electrical Fast Transient/Burst	Data communication cord: 1 kVPower core: 2 kV
Net Weight	400 g
Dimension (W × H × D)	173 mm × 18 mm × 94.8 mm (6.84" × 0.71" × 3.75")
Certification	CE, FCC

Specifications - DUX-RX-70 Receiver

Technical
Input 1 x HDBT IN
Input Signal Type HDBT
Input Resolution Support 4K, 1080p, 1080i, 720p, 576p, 480p, 576i, 480i
Input Video Level 0.5-1.2 V p-p
Input DDC Signal 5 V p-p
Output 1 x HDMI OUT
Output Signal Type TMDS
Output Resolution Support 4K, 1080p, 1080i, 720p, 576p, 480p, 576i, 480i
Video Impedance 100 Ω
Maximum Pixel Clock 297 MHz
General
Operating Temperature / RH 32°F ~ 113°F (0°C ~ 45°C) / 10% ~ 90%, non-condensing
Storage Temperature / RH -4°F ~ 140°F (-20°C ~ 70°C) / 10% ~ 90%, non-condensing
Power Supply 12 VDC 1.5A
Power Consumption ≤11.8 W (pair)
ESD Protection	Human-body model:±8 kV (Air-gap discharge)±4 kV (Contact discharge)
Surge Protection Voltage: ±1 kV
Electrical Fast Transient/Burst	Data communication cord: 1 kVPower cord : 2 kV
Net Weight	400 g
Dimension (W × H × D)	173 mm × 18 mm × 94.8 mm (6.84" × 0.71" × 3.75")
Certification	CE, FCC

Cable Specifications (Straight-through Ethernet cable of T568B is recommended)

Cable Type	Range	Supported Video
Cat6a/7	70 m / 230 ft	1080p@60Hz, 36 bpp
	40 m / 131 ft	1080p@60Hz, 48 bpp1080p@60Hz, 3D4K@30Hz
Cat5e/6	60 m / 197 ft	1080p@60Hz, 36 bpp
	35 m / 115 ft	1080p@60Hz, 48 bpp1080p@60Hz, 3D4K@30Hz

Panel - DUX-TX-70 Transmitter

Fig 1: DUX-TX-70 - Front Panel

Item Name Description
1 POWER LED		On: DUX-TX-70 is powered on.Off: DUX-TX-70 is powered off.
2 STATUS LED		Blinking: DUX-TX-70 is working properly.Off: DUX-TX-70 is not working properly.
3 HDCP LED		On: HDCP video is being transmitted.Blinking: Non-HDCP video is being transmitted.Off: No HDMI signal.
4 LINK LED		On: DUX-TX-70 and DUX-RX-70 are linked.Off / Blinking: No link or link error.

Fig 2: DUX-TX-70 - Rear Panel

Item Name Description
1 DC 12V		Connects the power adapter provided. If DUX-TX-70 is connected to a power supply, DUX-RX-70 can be powered by DUX-TX-70 through PoE. DUX-TX-70 and DUX-RX-70 can also be powered individually.
2 HDBT OUT Connects to HDMI IN of DUX-RX-70 using a CatX cable.
3 IR IN Connects the broadband IR Receiver provided.
4 IR OUT Connects the IR Emitter provided.
5 RS232 For firmware upgrading or serial communication.
6 HDMI IN Connects to an HDMI source using an HDMI cable.
7 MODE	NORMAL (Default Setting)RS232 signal can be passed through.DUX-TX-70 cannot be upgraded.UPDATE (Only used for firmware upgrading)DUX-TX-70 can be upgraded.RS232 signal cannot be passed through.

Panel - DUX-RX-70 Receiver

Fig 3: DUX-RX-70 - Front Panel

Item Name Description
1 POWER LED		On: DUX-RX-70 is powered on.Off: DUX-RX-70 is powered off.
2 STATUS LED		Blinking: DUX-RX-70 is working properly.Off: DUX-RX-70 is not working properly.
3 HDCP LED		On: HDCP video is being transmitted.Blinking: Non-HDCP video is being transmitted.Off: No HDMI signal.
4 LINK LED		On: DUX-TX-70 and DUX-RX-70 are linked.Off / Blinking: No link or link error.

Fig 4: DUX-RX-70 - Rear Panel

Item Name Description
1 DC 12V		Connects the power adapter provided. If DUX-TX-70 is connected to a power supply, DUX-RX-70 can be powered by DUX-TX-70 through PoE. DUX-TX-70 and DUX-RX-70 can also be power individually.
2 HDBT IN Connects to HDMI OUT of DUX-TX-70 using a CatX cable.
3 IR IN Connects the broadband IR Receiver provided.
4 IR OUT Connects the IR Emitter provided.
5 RS232 For firmware upgrading or serial communication.
6 HDMI OUT Connects to an HDMI display using an HDMI cable.
7 MODE	NORMAL (Default Setting)RS232 signal can be passed through.DUX-RX-70 cannot be upgraded.UPDATE (Only used for firmware upgrading)DUX-RX-70 can be upgraded.RS232 signal cannot be passed through.

Install Hardware

WARNING:

● Before installation, disconnect the power supplies of all the devices.
- Please use quality cables and accessories specified or provided by the manufacturer.
- During installation, connect and disconnect cables with caution.

To install DUX-TX-70 and DUX-RX-70 (See Fig 5: Installation Instruction Chart on Page 13):

1. Connect an HDMI source device (e.g. Blu-ray player, game console, satellite/cable TV, media server, etc.) to DUX-TX-70's HDMI IN port via an HDMI cable.
2. Connect a display device (e.g. LED/LCD display or projector) to DUX-RX-70's HDMI OUT port via an HDMI cable.
3. Connect DUX-TX-70's HDBT OUT port to DUX-RX-70's HDBT IN port via a CatX cable.
4. Connect an IR Emitter to IR OUT port of DUX-TX-70 and a broadband IR Receiver to IR IN port of DUX-RX-70. (Or connect a broadband IR Receiver to IR IN port of DUX-TX-70 and an IR Emitter to IR OUT port of DUX-RX-70.)
5. Connect the power adapter to DUX-TX-70, then connect the adapter to a power supply. (DUX-TX-70 and DUX-RX-70 can be connected to power individually.)
6. Power on all the units and start operation.

Note: When all set, check the LED indicators of both DUX-TX-70 and DUX-RX-70. For LED indication, please refer to page 08 and 10.

graph TD
    A["Display Remote"] --> B["DUX-TX-70"]
    B --> C["HDBT OUT"]
    C --> D["IR IN"]
    C --> E["IR OUT"]
    C --> F["TX RX G"]
    C --> G["HDMI IN"]
    G --> H["HDMI Cable"]
    I["Blu-Ray Player"] --> J["DUX-RX-70"]
    J --> K["Display"]
    L["Broadband IR Receiver"] --> M["HDBT IN"]
    N["IR Emitter"] --> O["HDMI Cable"]
    P["CATx Cable"] --> Q["HDBT OUT"]
    R["IR Emitter"] --> S["HDMI Cable"]
    T["Blu-Ray Player Remote"] --> U["Display"]

Fig 5: Installation Instruction Chart

Operate with IR

IR pass-through function allows you to control the source from the display location or the display from source location.

Control the Display

To control the display from the source location:

1. Connect a broadband IR Receiver to IR IN port of DUX-TX-70;
2. Connect an IR Emitter to IR OUT port of DUX-RX-70.

When all set, the display can be controlled at the source end through a display remote.

graph TD
    A["Display Remote"] --> B["Broadband IR Receiver"]
    B --> C["HDBT OUT"]
    C --> D["IR IN"]
    D --> E["IR OUT"]
    E --> F["TX RX G"]
    F --> G["HDMI IN"]
    G --> H["HDMI"]
    I["Blu-Ray Player"] --> J["HDMI"]
    K["DUX-TX-70"] --> L["CATx Cable"]
    M["DUX-RX-70"] --> N["HDBT IN"]
    O["IR Emitter"] --> P["HDMI"]
    Q["Display"] --> R["Display"]

Fig 6: Application Example - Control the Display

Control the Source

To control the source from the display location:

1. Connect an IR Emitter to IR OUT port of DUX-TX-70;
2. Connect a broadband IR Receiver to IR IN port of DUX-RX-70.

When all set, the source can be controlled at the display location through a source device remote.

graph TD
    A["Blu-Ray Player"] --> B["HDMI Cable"]
    C["IR Emitter"] --> B
    B --> D["DUX-TX-70"]
    D --> E["HDBT OUT"]
    E --> F["IR IN"]
    E --> G["IR OUT"]
    E --> H["TX RX G"]
    E --> I["HDMI IN"]
    I --> J["NORMAL UPDATE"]
    K["CATx Cable"] --> L["HDBT IN"]
    L --> M["Broadband IR Receiver"]
    N["Display"] --> O["Blu-Ray Player Remote"]

Fig 7: Application Example - Control the Source

Operate with RS232

RS232 Pinout

The following figure shows the RS232 pinout. Please connect with Phoenix Connectors provided.

Fig 8: RS232 Pinout

RS232 for Firmware Upgrading

RS232 port of DUX-TX-70 and DUX-RX-70 can be used for firmware upgrading.

To upgrade firmware of DUX-TX-70 or DUX-RX-70:

1. Download firmware upgrading execution software (please contact the product manufacturer or your local dealer) to your PC;
2. Swith the "MODE" to "UPDATE":
3. Connect your PC to RS232 port using a RS232 Cable:
4. Click to run the execution software:
5. When the upgrading is successful, power cycle the device.

NOTE: DUX-TX-70 and DUX-RX-70 must be upgraded individually.

Fig 9: RS232 for Firmware Upgrading

RS232 for Serial Communication

RS232 port of DUX-TX-70 and DUX-RX-70 can also be used for serial communication.

To start serial communications between DUX-TX-70 and DUX-RX-70:

1. Connect a RS232 Master (or Client) Device to RS232 port of DUX-TX-70 using a RS232 cable;
2. Connect a RS232 Client (or Master) Device to RS232 port of DUX-RX-70 using a RS232 cable;
3. Connect HDBT OUT of DUX-TX-70 and HDBT IN of DUX-RX-70 using a CatX cable.
4. When all set, serial communication can be realized between the two RS232 devices.

graph TD
    A["RS232 Device"] --> B["RS232 Cable"]
    B --> C["HDBT OUT"]
    C --> D["IR IN"]
    C --> E["IR OUT"]
    C --> F["TX RX G"]
    C --> G["HDMI IN"]
    C --> H["NORMAL UPDATE"]
    I["DUX-TX-70"] --> J["DT"]
    K["DUX-RX-70"] --> L["DT"]
    M["CS"] --> N["CS"]
    O["CS"] --> P["CS"]
    Q["CS"] --> R["CS"]
    S["CS"] --> T["CS"]
    U["CS"] --> V["CS"]
    W["CS"] --> X["CS"]
    Y["CS"] --> Z["CS"]
    AA["CS"] --> AB["CS"]
    AC["CS"] --> AD["CS"]
    AE["CS"] --> AF["CS"]
    AG["CS"] --> AH["CS"]
    AI["CS"] --> AJ["CS"]
    AK["CS"] --> AL["CS"]
    AM["CS"] --> AN["CS"]
    AO["CS"] --> AP["CS"]
    AQ["CS"] --> AR["CS"]
    AS["CS"] --> AT["CS"]
    AU["CS"] --> AV["CS"]
    AW["CS"] --> AX["CS"]
    AY["RS232 Device"] --> AZ["RS232 Cable"]
    style A fill:#f9f,stroke:#333
    style K fill:#f9f,stroke:#333
    style I fill:#ccf,stroke:#333
    style M fill:#ccf,stroke:#333
    style AA fill:#ccf,stroke:#333
    style AG fill:#ccf,stroke:#333
    style AK fill:#ccf,stroke:#333

Fig 10: Application Example - RS232 for Serial Communication

Troubleshooting

1. Why the Power LED is off?

• Check that all the devices are on.
• Check that all the cables are qualified and connected properly.

2. Why the Link LED is off or blinking?

• Check that all the devices are on.
• Check that all the cables are qualified and connected properly.
• Check that the length of CatX cable is less than 70 meters (1080P) or 40 meters (4K). For more information, see Cable Specifications in Specifications.

3. Why the display connected to the DUX-RX-70 shows no picture?

• Check that all the devices are on.
• Check that all the cables are qualified and connected properly.
• Check that the Link LED is steady on. For more information, see Q2 above.
• Check that the display works properly, and that the source device has normal signals output.
• Ensure that the display device supports HDCP.
• Ensure the length of CatX cable is less than 70 meters (1080P) or 40 meters (4K). For more information, see Cable Specifications in Specifications.
• Ensure the length of HDMI cables: when transmitting 1080p signal, HDMI input and output cables should be less than 15 meters; when transmitting 4k@30Hz signal, HDMI input cable should be less than 10 meters, HDMI output cable less than 15 meters. For more information, see Cable Specifications in Specifications.
• Check that your display device is switched to the correct source input mode, for example, switching to HDMI 1 if HDMI 1 interface is connected to DUX-RX-70 via an HDMI cable.
• Check that no compatibility issue exists between DUX-RX-70 and the display. If so, replace the display with other models.

4. Why the display connected to the DUX-RX-70 shows snow or mosaic?

• Check that all the cables are qualified and connected properly.
• Check that Ethernet cables are Cat5e/6 or higher gauge.
• Check that the source input device has no such problem as snow, mosaic or with a damaged disc. If so, replace with another qualified input source.
• Check that no compatibility issue exists between DUX-RX-70 and the display. If so, replace the display with qualified models.

AMX DUX SERIES

DUX-8C	Compact 8x8 HDMI 2.0 matrix switcher for video signals up to 4K@60Hz 4:4:4 (bandwidth 18 Gbps)
DUX-8D	Dual output 8x8 HDMI 2.0 matrix switcher with 4 mirrored HDBT outputs for video signals up to 4K@60Hz 4:4:4 (bandwidth 18 Gbps)
DUX-TX	HDMI 1.4 over HDBT TX up to 100m
DUX-RX	HDMI 1.4 over HDBT RX up to 100m
DUX-TX-70	HDMI 1.4 over HDBT TX up to 70m
DUX-RX-70	HDMI 1.4 over HDBT RX up to 70m
DUX-SCL	HDMI scaler up to 4K@60Hz 4:4:4
DUX-SRX	HDBT scaling receiver up to 4K@60Hz 4:4:4
DUX-MTX	HDMI 1.4 & VGA over HDBT TX up to 100m
DUX-MTX-WP	HDMI 1.4 & VGA over HDBT wall-plate TX up to 100 m

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AMX does not assume responsibility for errors or omissions. AMX also reserves the right to alter specifications without prior notice at any time.

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