Lenkeng LKV981 Full HD HDMI Optical Extender User Manual
- June 17, 2024
- LENKENG
Table of Contents
User Manual
Full HD HDMI OPTICAL EXTENDER
Important Safety Instructions:
- Do not expose this device to rain or place it near water. Any liquid that goes into the device may cause a failure, fire, or electric shock.
- Never insert anything metallic into the open parts of this device. This may cause a danger of electric shock.
- Do not place this device near or over a radiator or heat register, or where it is exposed to direct sunlight.
- The device should be repaired only by a qualified technician.
- If a third-party power supply is used, please ensure that the power supply specifications meet the product requirements.
Introduction
This product is a Full HD HDMI optical extender kit consisting of a
transmitter and a receiver, using ipcolor STREAM technology for
highdefinition, low-latency
transmission. The 1080P@60Hz HDMI signal can be extended up to 40km by LC
single-mode fiber cable, supporting one-to-one connection, or gigabit switch
cascading. It also supports HDMI loop out, IR passback, and RS-232 pass-
through functions, and can be widely used in meetings, home entertainment,
educational presentations, and other fields.
Features
- Adopting ipcolor STREAM technology can realize high-definition and low-latency transmission.
- Support up to 1920×1200@60Hz/1920×1080@60Hz resolution, backward compatible.
- Support optical fiber transmission, the maximum transmission distance of 40 kilometers.
- Support one-to-one or gigabit switch cascading.
- Support RS-232 pass-through.
- The transmitter supports HDMI loop out.
- Support IR passback (20~60kHz).
- Firmware can be upgraded through Micro USB.
- The transmitter has a 3.5mm audio input for sound embedding, the receiver has an independent 3.5mm audio output.
- Lightning protection, surge protection, ESD protection.
- Working 24/7.
Package Contents
Installation Requirements
| Item | Description | Requirement |
|---|---|---|
| Signal source device | PC, DVD, NVR, etc. with HDMI port | HDMI cable ≤ 5m |
| Optical fiber cable | LC single-mode (default Config) LC multimode fiber optic | |
| cable | ≤40km |
≤300m
Display device| TV, projector, LED screen, etc. with HDMI port| HDMI cable ≤
5m
optical fiber switch| One-to-one or switch cascading| Gigabit optical fiber
switch
Wall Mounting
Note: Choose the wall mounting position and attach the mounting ears to the unit according to the diagram.
Panel Description
1. Transmitter
| 1 | Reset | Press to restart the device |
|---|---|---|
| 2 | Power indicator (blue) | The indicator will turn on when the power is turned |
on
3| Status indicator
(orange)| 1) Light off: The transmitter and the receiver have not established
a connection
2) Slow flash: The transmitter and the receiver are connected but no video
data transmission (gigabit Ethernet)
3) Quick flashThe transmitter and the receiver are connected but no video data
transmission (100M Ethernet)
4) Steady on: The video data is transmitting
4| L/R IN| Connect to the audio source device with 3.5mm stereo audio cable
5| RS-232 (GND/RXD/TXD)| Used for RS-232 passthrough
6| Micro USB interface| Used for firmware upgrade
7| Power| Connect with DC5V/2A power adapter
8| HDMI input| Connect with HDMI source device
9| IR output| Connect with IR blaster extension cable
10| HDMI out| Connect with local HDMI display device
11| SFP signal out| Insert the SFP optical module (T1310nm/R1550nm)
2. Receiver
| 1 | Reset | Press to restart the device |
|---|---|---|
| 2 | Power indicator (blue) | The indicator will turn on when the power is turned |
on
3| Status indicator (orange)| 1) Light off: The transmitter and the receiver
have not established a connection
2) Slow flash: The transmitter and the receiver are connected but no video
data transmission (gigabit Ethernet)
3) Quick flash: The transmitter and the receiver are connected but no video
data transmission (100M Ethernet)
4) Steady on: The video data is transmitting
4| RS-232 (GND/RXD/TXD)| Used for RS-232 passthrough
5| Micro USB interface| Used for firmware upgrade
6| SFP signal input| Insert the SFP optical module (T1550nm/R1310nm)
7| L/R OUT| Connect with IR receiver extension cable
8| IR input| Connect to the audio device with 3.5mm stereo audio cable
9| HDMI output| Connect with HDMI display device
10| Power| Connect with DC5V/2A power adapter
Installation Procedures
1. Connection Diagrams
1.1 One-to-one connection
1.2 One-to-one connection (gigabit switches cascading)
Note: It is suggested to use gigabit (1000 Mbps) switches in LAN transmission, and 100Mbps switches should not be mixed with gigabit switches when cascading.
2. Connection Instructions
- Connect the source device to the HDMI IN port of the transmitter with an HDMI cable, and connect the HDMI OUT port of the receiver to the display device with another HDMI cable.
- If it’s one-to-one connection, then use a LC fiber optic cable to connect the SFP port of the transmitter and receiver. If it is one-to-one connection (gigabit switches cascading), then use the gigabit switch as a bridge to connect the transmitter and the receivers with the LC fiber optic cables respectively.
- If using HDMI loop out, connect the display device to the HDMI OUT port of the transmitter.
- If you need another audio source instead of the HDMI audio source, connect the audio source to the L/R IN port of the transmitter with a 3.5mm stereo audio cable.
- If you need to output additional audio sources from the receiver or extend only L/R stereo audio, connect the receiver’s L/R OUT port to the audio device using a 3.5mm stereo audio cable.*
- Plug the power supply into the devices to get started.
- a. When the HDMI IN port of the transmitter is connected and the L/R IN port is not connected, the HDMI audio source can output from the HDMI OUT and L/R OUT ports of the receiver simultaneously.
b. When the HDMI IN port and the L/R IN port of the transmitter is both connected, the L/R stereo audio source can output from the HDMI OUT and L/R OUT ports of the receiver simultaneously.
c. When the L/R IN port of the transmitter is connected and the HDMI IN is not connected, it can be used as an audio extender, the L/R stereo audio source can only output from the L/R OUT port of the receiver.
3. IR User Guide
1. Power
2. IR Signal
3. Null| 1. Power
2. IR Signal
3. Grounding
---|---
- IR blaster extension cable should plug in the IR OUT port of transmitter, and the IR receiver extension cable should plug in the IR IN port of the receiver.
- The emitter of the IR blaster extension cable should be as close as possible to the IR receiving window of the source device.
- Point the remote control at the receiving head of the IR receiver extension cable to operate.
4. RS-232 pass-through function:
4.1 Baud rate
Different encoding mechanisms cannot be mixed, the baud rate of the RS-232
port of this transmitter and receiver is 2400, 4800, 9600, 19200, 38400,
57600, 115200.
4.2 Line order
Make sure the RS-232 serial line is firmly connected and that the serial data
line is connected correctly as follows:
If the RS-232 serial does not work by following the above connection, please try to change the order of the TXD line and RXD line.
4.3 Check baud rate
If you need to check the baud rate, set the baud rate value of the serial port
test tool to the default value of 115200, connect the serial port test tool to
the product, and then power on the product. The baud rate printed at this time
is the current baud rate. For example: “Baudrate:9600”, that is, the baud rate
value is 9600.
4.4 Set baud rate
For example: the baud rate of the product is 9600, and the baud rate of the
serial port test tool is 115200. At this time, the baud rate of the serial
port test tool must be set to 9600, which is consistent with the product, and
then input the command you want to set “Bset:19200”, if “Succeed” is displayed
after sending data, the baud rate 19200 is set successfully.
FAQ
Why the status indicator is off?
Please check whether all equipment is powered on and the LC fiber optic cable is connected properly.
Why is the status indicator has been flashing?
- Please check whether there is HDMI signal input for the TX. 2) Try to connect the signal source directly to the display device, or try to change the signal source and HDMI cable and test again.
Why is the output image unstable?
Technical Parameters
| Item | Transmitter | Receiver |
|---|
Video
Input interface| 1 x HDMI| 1x SFP to LC
Output interface| 1x HDMI
1x SFP to LC| 1x HDMI
HDMI length| ≤ 5m| ≤ 5m
Compatibility| HDMI 1.3
HDCP 1.4
Resolutions| 1080p@50/60Hz, 720p@50/60Hz, 1920×1200@60Hz
Input and output TMDS signal| 0.7~1.2Vp-p（TMDS）
Input and output DDC signal| 5Vp-p (TTL)
Connection types| One-to-one connection Switch cascading
Transmission distance| Single-mode Optical Fibers.40km
Transmission latency| 80-140ms
Audio Signal
Input interface| 1x HDMI
1x 3.5mm L/R| 1x SFP to LC
Output interface| 1x SFP to LC| 1x HDMI
1x 3.5mm L/R
HDMI out| LPCM 2.0
3.5mm L/R output| PCM
Command Signal
IR interface| 1x 3.5mm IR out| 1 x 3.5mm IR in
IR receiving range| ≤ 5m
IR frequency| 20kHz-60kHz
RS-232 (GND/RXD/TXD)| Default baud rate: 115200
Supported: 2400, 4800, 9600, 19200, 38400, 57600, 115200
Power
Power Supply| DC 5V/2A| DC 5V/2A
Power Consumption| TX ≤ 7.5W| RX ≤ 7.5W
Operating Environment
Working temperature| – 10℃~50℃
Storage temperature| – 30℃~70℃
Humidity| 0-90%RH (no condensation)
Physical Properties
Housing| Iron
Weight| TX: 290g| RX: 286g
Color| Black
Dimensions| 106.0(0103.0(W)20.6(H)mm
Protection| ESD protection
1a Contact discharge level 2 (±4KV)
1b Air discharge level 3 (±8KV)
Implementation of the standard: IEC61000-4-2
Lightning protection, Surge protection
Disclaimer
The product name and brand name may be registered trademark of related
manufactures. ™ and ® may be omitted on the user manual. The pictures in this
user manual are just for reference. We reserve the rights to make changes
without further notice to a product or system described herein to improve
reliability, function or design.
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