LINK-MI LM-CX500 User manual

HDMI Extender 500M over Coaxial
Dear customer
Thank you for purchasing this product. For optimum performance and safety, please read these instructions
carefully before connecting, operating or adjusting this product. Please keep this manual for future reference.
The products are designed to make your A/V device use more convenient, comfortable, productive and
cost-efficient.
The HDMI coaxial extender can do digital coding processing for HDMI signal with DTV technology.
The product adopts RF modulation technology characteristic to transmit the Multiple RF signal through
one common coaxial cable (SYV-75/RG59) for long distance transmission without amplification. The
receiver can restore the high-definition video signal and transmit it to the TV or monitor. By adding
DTV network mixer at the RF cable, you can easily achieve many kinds of transmission mode, e.g.
signal split, switch and matrix.
Our devices offer solutions for noise, space and security concerns, data center control, information distribution,
conference room presentation, school and corporate training environments.
FEATURES：
Contains a transmitter (TX) and a receiver (RX). The TX supports a HDMI input and the RX supports a HDMI
output.
Support HDMI resolution up to 1080P/60Hz.
Transmission distance up to 500 meters by SYV-75-5 coaxial cable and no need amplification.
Adding digital TV network mixer in RF cable, can easily achieve many kinds of transmission mode, e.g.
signal split, switching and matrix.
Support 80 channels for option; frequency ranges 139MHz~950MHz.
Products using the broadcast signal transmission mode, only one line can transmit 48 channels of
high-definition video signal at the same time.
The use of digital TV communication protocol, anti interference and error correction capability is very strong.
Installs in minutes. Analog monitor system upgrade to HD systems can continue to use the original
connector and cable.
DC5V/1A power adapter.
PACKAGE CONTENTS:
1. Extender TX unit 1pcs
2. Extender RX unit 1pcs
3. AC power adapter 2pcs
4. User manual 1pcs
FEATURES OF THE INTERFACE:
Transmitter (TX)
FIG.1 TX Front Panel View FIG.2 TX Rear Panel View
PWR LED: POWER ON/OFF indicator
HDMI LED: HDMI input indicator
DC5V: 5V DC in jack
HDMI IN: HDMI signal input
CHANNEL: Channel selection switch
RF OUT: RF signal output

Receiver (RX)
FIG.3 RX Front Panel View FIG.4 RX Rear Panel View
PWR LED: POWER ON/OFF indicator
HDMI LED: HDMI output indicator
DC5V: 5V DC in jack
HDMI OUT: HDMI signal output
CHANNEL: Channel selection switch
RF IN: RF signal input
OPERATIONG AND CONNECTION:
Ⅰ. Point to point mode
FIG.5 CONNECTION DIAGRAM
1.Connect one SYV-75/RG59 coaxial cable from TX RF OUT into the RX RF IN.
2.Connect one HDMI cable from a DVD/BD player into the HDMI input port of TX.
3.Connect one HDMI cable from TV/Monitor into the HDMI output port of RX.
4.Set same ID to Channel switch of TX and RX (Detailed setting method reference behind the table).
5. Connect 5V power supply to the TX&RX, and inserted into the power socket.
Ⅱ. Splitter mode
FIG.6 SPLITTER CONNECTION DIAGRAM
1. Connect one SYV-75/RG59 coaxial cable from TX RF OUT into the input port of DTV mixer.
2. Connect SYV-75/RG59 coaxial cables from RX RF IN into the output ports of DTV mixer.
TV/Monitor
DVD/BD/STB
TX
RX
DVD/BD/STB
TX
RX
RX
HDMI cable
DTV MIXER
Coaxial cable
HDMI cable
HDMI cable
Coaxial cable
Coaxial cable
Coaxial cable
HDMI
cable
HDMI
cable
TV/Monitor
TV/Monitor

3. Connect one HDMI cable from a DVD/BD player into the HDMI input port of TX.
4. Connect HDMI cables from TV/Monitor into the HDMI output port of RX.
5. Set same ID to Channel switch of TX and RX (Detailed setting method reference behind the table).
6. Connect 5V power supply to the TX&RX, and inserted into the power socket.
Ⅲ. Matrix mode
FIG.7 MATRIX CONNECTION DIAGRAM
1. Connect SYV-75/RG59 coaxial cables from TX RF OUT into the output ports of DTV mixer.
2. Connect SYV-75/RG59 coaxial cables from RX RF IN into the output ports of DTV mixer.
3. Connect input ports of two DTV mixers with one SYV-75/RG59 coaxial cable.
4. Connect HDMI cables from DVD/BD player into the HDMI input port of TX.
5. Connect HDMI cables from TV/Monitor into the HDMI output port of RX.
6. The need for communication with the TX and RX set to the same channel.
7. Connect 5V power supply to the TX&RX, and inserted into the power socket.
Notes:
1. In normal conditions, transmission distance up to 500 meters by SYV-75-5 coaxial cable and no
need amplification. For the high-frequency RF signal haves signal attenuation, signal strength will
become weakened after adding DTV network mixer and multi output.
2. If the signal frequency is high, the transmission attenuation is greater. So choose low channel for
long-distance transmission.
3. When the transmission distance is short (less than 100 meters), because the signal is too strong, RX may
protect and display "NO SIGNAL" to TV. So now you should choose high channel or adding attenuator in
coaxial cable for the signal attenuation.
4. With the channel set and frequency values refer to the table below, and channel selection switch setting
method is as follows:
e.g.1 CH1（0000 0001）e.g.2 CH11（0001 0001）
DVD/BD/STB
RX
RX
DTV Mixer
HD camera
TX
TX
HDMI
cable
Coaxial cable
TV/Monitor
HDMI
cable
Coaxial cable
Coaxial cable
Coaxial cable
Coaxial cable
HDMI
cable
HDMI
cable
TV/Monitor

Channel set and frequency reference table
Channel
ID
Switch Setting
（12345678）
Frequency
（MHz）
BW
（MHz）
Channel
ID
Switch Setting
（12345678）
Frequency
（MHz）
BW
（MHz）
1
0000 0001
142.5
7
41
0100 0001
634
8
2
0000 0010
149.5
7
42
0100 0010
642
8
3
0000 0011
156.5
7
43
0100 0011
650
8
4
0000 0100
163.5
7
44
0100 0100
658
8
5
0000 0101
177.5
7
45
0100 0101
666
8
6
0000 0110
184.5
7
46
0100 0110
674
8
7
0000 0111
191.5
7
47
0100 0111
682
8
8
0000 1000
198.5
7
48
0100 1000
690
8
9
0000 1001
205.5
7
49
0100 1001
698
8
10
0001 0000
212.5
7
50
0101 0000
706
8
11
0001 0001
219.5
7
51
0101 0001
714
8
12
0001 0010
226.5
7
52
0101 0010
722
8
13
0001 0011
410
8
53
0101 0011
730
8
14
0001 0100
418
8
54
0101 0100
738
8
15
0001 0101
426
8
55
0101 0101
746
8
16
0001 0110
434
8
56
0101 0110
754
8
17
0001 0111
442
8
57
0101 0111
762
8
18
0001 1000
450
8
58
0101 1000
770
8
19
0001 1001
458
8
59
0101 1001
778
8
20
0010 0000
466
8
60
0110 0000
786
8
21
0010 0001
474
8
61
0110 0001
794
8
22
0010 0010
482
8
62
0110 0010
802
8
23
0010 0011
490
8
63
0110 0011
810
8
24
0010 0100
498
8
64
0110 0100
818
8
25
0010 0101
506
8
65
0110 0101
826
8
26
0010 0110
514
8
66
0110 0110
834
8
27
0010 0111
522
8
67
0110 0111
842
8
28
0010 1000
530
8
68
0110 1000
850
8
29
0010 1001
538
8
69
0110 1001
858
8
30
0011 0000
546
8
70
0111 0000
866
8
31
0011 0001
554
8
71
0111 0001
874
8
32
0011 0010
562
8
72
0111 0010
882
8
33
0011 0011
570
8
73
0111 0011
890
8
34
0011 0100
578
8
74
0111 0100
898
8
35
0011 0101
586
8
75
0111 0101
906
8
36
0011 0110
594
8
76
0111 0110
915
8
37
0011 0111
602
8
77
0111 0111
924
8
38
0011 1000
610
8
78
0111 1000
930
8
39
0011 1001
618
8
79
0111 1001
938
8
40
0100 0000
626
8
80
1000 0000
946
8
Switch setting note: 0-dial switch to the up, 1-dial switch to the down. In fact, the switch 8 bit code
equals to the binary code of channel ID.

SPECIFICATIONS:
HDMI resolution ……………………………………..24/50/60fs/1080p/1080i/720p/576p/576i/480p/480i
HDMI Audio Format……………………………………………………………………………………..LPCM
HDMI Max bandwidth………………………………………………………….……………………...225MHz
HDMI Max baud rate…………………….………………….………………….……………………6.75Gbps
Input/Output TMDS signal ………….……………………………….……………….0.5~1.5Volts p-p(TTL)
Input/Output DDC signal ……………………………………………..……………………. 5Volts p-p (TTL)
RF frequency range…………………………………………………………………………...139～950 MHz
RF Channel B/W…………………………………………………………………………..................7/8 MHz
The number of Channel…………………………………………………………………............................80
RF Output power…………………………………………………………………..............................-6dBm
RF Connector type…………………………………………………………………The imperial F type/BNC
Coaxial cable Characteristic impedance…………………………………………………………………75Ω
RF transmission distance………………………………………≤500m SYV-75-5 coaxial standard cable
HDMI output cable distance………………………………………...≤15m AWG26 HDMI standard cable
TX Max working current …………………………………………………………….……….…….…. 650Ma
RX Max working current …………………………………………………………….……….…….…. 500mA
Power adapter format Input ……......….….…….…….…….…. AC 100V～240V 50HZ/60Hz, DC5V/1A
Operating Temperature range ……..…………….……………………………………………. -10 to +45℃
Storage Temperature range……………………………………………………………………. -20 to +60℃
Operating Humidity range ………………………….….……….……….10 to 90%RH (No Condensation)
Storage Humidity range………………………….….……….……………5 to 95%RH (No Condensation)
Case Dimension (L x W x H) ………………………………….…………………………….94x74x28 (mm)
Weight …….…………………………….………………………………………….………………..…… 240g
Notes:
Pls use the machine as the instruction listed to keep the long use lifetime of the machine.
1. The machine should be placed at the spot far from the Damp, High-Temperature, Dusty, Erosive, and
oxidative environment.
2. All parts will be free from the strong shake, hit, fall.
3. Touching the power adaptor with the wet hands is prohibited.
4. Pls hold the power adaptor head and do not pull the power cord when cut off from the socket.
5. Pls turn the power off when the machines not used for long time.
6. Pls do not open the cover and do not touch the inside parts.
7. Pls use the original factory power adaptor.

FAQ:
Before power on, pls check the connection line carefully. And make sure that all interfaces are normally
connected. The common trouble shooting way shows below:
No.
Problem Description
Solutions
1
Non-Power-Connected
1. Check if the power adaptor head is truly and correctly inserted the
power socket.
2. Check the power if it is in on status.
2
Display “No SIGNAL”
to TV
1. Confirm the coaxial cables are intact and reliable connection.
2. Confirm the length of coaxial cable is too short. When the
transmission distance is short (less than 100 meters), you should
choose high channel or adding attenuator in coaxial cable for the
signal attenuation.
3. Confirm the TX and RX channel settings should be the same
4. Check the cable quality. ( Recommend use SYV-75/RG59 coaxial
standard cable)
3
Display “SIGNAL
LOSS” to TV
1. Confirm the HDMI cable of TX is intact and reliable connection.
2. Check the signal source is power on and output normal.
3. Check the HDMI cable quality.
4
Display “RESOLUTION
NOT SUPPORT” to TV
1. Check the signal source output resolution, may be set too high.
2.Confirm whether to support the signal resolution of TV
5
Image mosaic/
Abnormal Picture
1. Confirm the coaxial cables are intact and reliable connection.
2. Confirm the length of coaxial cable is too short or long.
3. Device EDID read error, please reboot.
4. Nearby signal interference, proposals to change the other channel
6
Abnormal sound
1. Check the signal source output audio format is LPCM. Audio
output options of signal source should be set to "Auto" or "LPCM"
2. Device EDID read error, please reboot.