GoMax Electronics CV-57C User manual

HDMI Extender over Dual Cat.X with IR
User Manual
To avoid EMI issue, complete STP Cat6 cable is strongly recommended!
rev: 131024
Made in Taiwan
C
CV V- -5 57 7C C

The CV-57C HDMI Extender over Dual Cat.X with IR has been tested for conformance to safety
regulations and requirements, and has been certified for international use. However, like all
electronic equipments, the CV-57C should be used with care. Please read and follow the safety
instructions to protect yourself from possible injury and to minimize the risk of damage to the unit.
●Follow all instructions and warnings marked on this unit.
●Do not attempt to service this unit yourself, except where explained in this manual.
●Provide proper ventilation and air circulation and do not use near water.
●Keep objects that might damage the device and assure that the placement of this unit is on a
stable surface.
●Use only the power adapter and power cords and connection cables designed for this unit.
●Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to the device
before cleaning.
TABLE OF CONTENTS
INTRODUCTION.....................................................................................................................1
FEATURES..............................................................................................................................1
SPECIFICATIONS...................................................................................................................2
PACKAGE CONTENTS........................................................................................................3
PANEL DESCRIPTIONS.........................................................................................................3
Transmitting unit ►CV-57C-TX..................................................................................3
Receiving unit ► CV-57C-RX.....................................................................................4
IR PASS-THROUGH...............................................................................................................5
HARDWARE INSTALLATION..............................................................................................7
CONNECTION DIAGRAM ......................................................................................................7
NOTICE ...................................................................................................................................8
RJ45 / CAT5 PIN DEFINITION.............................................................................................9
WARRANTY..........................................................................................................................10

1
INTRODUCTION
The CV-57C HDMI Extender over Dual Cat.X with IR boosts up your HDMI transmission distance
up to 60m (200ft) in HDTV 720p / 1080i format. With two low cost Cat-5/5e/6 cables, users can readily
extend HDTV sources from DVD players, Blu-ray Disc player, PS3, PC, and any other kinds of sources
compliant with TMDS to distant display monitors including HDMI enabled TV sets, LCD PC monitors, or
projectors. This cost effective flexibility makes HDCP compliant DVD players or PS3 transmit high quality
video and audio with a greater distance at the minimal cost, when integrating several components apart.
In addition, with the embedded infrared (IR) receiving and emitting units to facilitate the control path,
users can enjoy high quality audio/video and control the HDMI sources from the remote site instantly.
The CV-57C includes two units: CV-57C-TX as the transmitting unit and CV-57C-RX as the receiving
unit. The transmitting unit is used to transfer the HDMI or DVI and IR signals input and carry the signals
through two RJ45 connectors over two low cost Cat-5/5e/6 cables. The receiving unit is responsible for
equalizing transferred TMDS multimedia data and re-sending IR signals. The transmission distance
between the sending and receiving units can be up to 60m (200ft) under HD resolution (720p or 1080i) or
40m (130ft) under Full HD resolution (1080p). With 8-level equalization rotary control on the receiving unit,
users can adjust the equalization scale to the received TMDS signals, and therefore optimize the
transmission distance between source and destination.
FEATURES
●Support HDMI Deep Color & full 3D
●HDCP 1.3 compliant
●Extends the transmission distance up to 60m (200ft) from the sources under 1080i or 720p
●Extends the transmission distance up to 40m (130ft) from the sources under 1080p
●Provides independent DDC channel, fully HDCP compliant
●Minimizes the cable skew by adjustable 8-level equalization rotary control switch
●Embedded IR pass-through (38kHz) from RX to TX
●Pure unaltered uncompressed 7.1ch digital HDMI over UTP cable transmission
●Wall mounting housing design for easy and robust installation
●Perfectly integrated with other HDMI over Cat.X series products
The claimed transmission distance here is subject to the grade of installed cable(s), source
device and display.
For over Cat.X/COAX transmission, the cable(s) has to be solid, not stranded. Any keystone
jack along the transmission path will kill the transmission performance significantly!For
more information, please check HERE.

2
SPECIFICATIONS
Model Name
CV-57C
Technical
CV-57C[Tx]
CV-57C[Rx]
Role of usage
Transmitter [TX]
Receiver [RX]
HDMI compliance
HDMI Deep Color & full 3D
HDCP compliance
Yes
Video bandwidth
Single-link 225MHz [6.75Gbps]
Video support
480i / 480p / 720p / 1080i / 1080p60 up to 36-bit color
HDMI over UTP
Full HD (1080p)-15m (50ft) [CAT5e] / 18m (65ft) [CAT6]
HD (720p/1080i)-25m (80ft) [CAT5e] / 30m (100ft) [CAT6]
Audio support
Surround sound [up to 7.1ch) or stereo digital audio
Equalization
8-level digital rotary switch for signal level control at RX
Input TMDS signal
1.2 Volts [peak-to-peak]
Input DDC signal
5 Volts [peak-to-peak, TTL]
ESD protection
[1] Human body model —±19kV [air-gap discharge] & ±12kV [contact discharge]
[2] Core chipset —±8kV
PCB stack-up
4-layer board [impedance control —differential 100Ω; single 50Ω]
Input
1x HDMI
2x RJ-45 + 1x 3.5mm
Output
2x RJ-45 + 1x 3.5mm
1x HDMI
HDMI source control
Controllable via IR pass-through from RX to TX with IR extenders
IR remote control
Electro-optical characteristics: = 25°/ Carrier frequency: 36-40kHz
HDMI connector
Type A [19-pin female]
RJ-45 connector
WE/SS 8P8C with 2 LED indicators
3.5mm connector
IR blaster
IR receiver
Rotary control switch
None
8-level signal equalization
Mechanical
Housing
Metal enclosure
Dimensions
[L x W x H]
Model
83 x 74 x 27mm [3.3" x 2.9" x 1"]
Package
270 x 175 x 80mm [10.6" x 6.9" x 3.1"]
Carton
450 x 370 x 300mm [1'6" x 1'3" x 11.8"]
Weight
Model
213g [1.4 oz]
Package
750g [1.7 lbs]
Fixedness
Wall-mounting case with screws
Power supply
5V 4A DC
Power consumption
1.5 Watt [max]
Operation temperature
0~40°C [32~104°F]
Storage temperature
-20~60°C [-4~140°F]
Relative humidity
20~90% RH [no condensation]

3
PACKAGE CONTENTS
●1x CV-57C [TX & RX] ●1x IR blaster
●1x IR receiver ●1x DC 5V 4A wall wart
●1x User Manual
PANEL DESCRIPTIONS
Transmitting unit ►CV-57C-TX
Front Panel
1. IR Blaster: Infrared 3.5mm socket for plugging in the extension cable of IR blaster
2. HDMI IN: Connect to a HDMI source with a HDMI male-male cable here
Rear Panel
3. A/V SIGNAL: Connect to the A/V SIGNAL port on the receiving unit with a Cat-5/5e/6 cable
4. CTRL CHANNEL: Connect to the CTRL CHANNEL port on the receiving unit with a Cat-5/5e/6 cable
Incorrect placement of IR blaster and receiver may result in the failure of the IR extenders.
Warranty will not cover the damage.

4
Receiving unit ► CV-57C-RX
Front Panel
5. IR Receiver: Infrared 3.5mm socket for plugging in the extension cable of IR receiver.
6. HDMI OUT: Connect to a HDMI display with a HDMI male-male cable here.
7. Signal Level: Adjust the 8-level signal level equalization control to the received HDMI signals. The
HDMI signal level varies from 0 (strongest) to 7 (weakest) for respective transmission length from
longest possible range to short distance. Dial the Signal Level from 7 to 0 and stop turning the rotary
switch whenever the audio/video is playing normally. Inappropriate signal level setting may cause
overpowering issues that would shorten the product's life significantly!
Rear Panel
8. +5V DC: Connect to a 5V DC power supply.
9. A/V SIGNAL: Connect to the A/V SIGNAL port on the transmitting unit with a Cat-5/5e/6 cable.
10.CTRL CHANNEL: Connect to the CTRL CHANNEL port on the transmitting unit with a Cat-5/5e/6
cable

5
IR PASS-THROUGH
IR Extenders
IR Blaster
IR Receiver
IR Sockets
IR BLASTER: plug in the IR blaster to emit all IR command signals received from the IR receiver from the
other enf to control the devices corresponding to the IR signals.
IR RECEIVER: plug in the IR receiver to receive all IR command signals from the IR remote controls of
the corresponding devices.
Definition of IR Earphone Jack
IR Blaster
IR Receiver
You can buy any IR extension cables in the market that are compatible to the definition of
the IR sockets for the matrix if necessary for replacement use. However, IR cables longer
than 2m (6-ft) may not work.
Incorrect placement of IR Blaster and Receiver may result in the failure of the IR extenders. Please check
carefully before plugging in the IR extender to the respective IR sockets. Warranty will not cover the damage.
CAUTION!

6
Supported IR Data Format
Data Format
Suitable
Not Recommended
NEC

RC5

TOSHIBA MICOM CODE

GRUNDIG CODE

SONY 12 BIT CODE

SONY 15 BIT CODE

SONY 20 BIT CODE

RCA CODE

RCM CODE

MATSUSHITA CODE

MITSUBISHI CODE

ZENITH CODE

JVC CODE

M50560-001P

MN6125H

MN6125L

MN6014_C5D7

MN6014-C6D6

MC14457P

LC7464(AHEA)

GEMINI_CM


7
HARDWARE INSTALLATION
1. Connect a video source (such as a Blu-ray Disc player) to the transmitting unit CV-57C-TX.
2. Connect the IR blaster to the transmitting unit CV-57C-TX, and make the IR blaster directly point to
the IR sensor of the HDMI source device(s).
3. Connect a display (such as a LCD or plasma HDTV) to the receiving unit CV-57C-RX.
4. Connect the IR receiver to the receiving unit CV-57C-RX, and make the IR receiver directly point to
the user.
5. Connect two Cat-5/5e/6 cables between the transmitting and receiving units via A/V SIGNAL and
CTRL CHANNEL ports respectively.
6. Make sure these two Cat-5/5e/6 cables are tightly connected and not loose.
7. Plug in 5V DC power supply unit to the power jack of the receiving unit CV-57C-RX.
8. If you see flickering or blinking image on the display, adjust the rotary control Signal Level on the
receiving unit to improve the cable skew. 0 stands for the strongest HDMI signal level for longest
possible transmission length while 7 stands for the weakest HDMI signal level for short transmission
length. Try adjusting the signal level from 7 to 0 to find the optimal setting for the HDMI over CAT5
transmission.
CONNECTION DIAGRAM

8
NOTICE
1. When adjusting the signal level on the receiver unit, please dial the rotary control switch from 7 to 0
and stop turning the rotary switch whenever the audio/video is playing normally. Inappropriate signal
level setting may cause overpowering issue that would shorten the product life significantly!
2. Wrongly insert IR blaster and IR receiver to wrong 3.5mm infrared sockets may result in the failure of
the IR extenders. Please check carefully before plugging in the IR extender to the respective IR
sockets.
3. If the DVI or HDMI device requires the EDID information, please use EDID Reader/Writer to retrieve
and provide DVI or HDMI display EDID information.
4. All HDMI over CAT5 transmission distances are measured using Belden 1583A CAT5e 125MHz UTP
cable and ASTRODESIGN Video Signal Generator VG-859C & VG-870B.
5. The transmission length is largely affected by the type of Cat-5/5e/6 cables, the type of HDMI sources,
and the type of HDMI display. The testing result shows solid UTP cables (usually in the form of 300m
[1,000ft] bulk cables) can transmit a lot longer signals than stranded UTP cables (usually in the form of
fixed length patch cords). Shielded STP cables are better suited than unshielded UTP cables. A solid
UTP Cat-5e cable shows longer transmission range than stranded STP Cat-6 cable. For long
extension applications, solid UTP/STP cables are the only viable choice.
6. EIA/TIA-568-B termination (T568B) for Cat-5/5e/6 cables is recommended for better performance.
7. To reduce the interference among the unshielded twisted pairs of wires in Cat-5/5e/6 cable, one can
use shielded STP cables to improve EMI problems, which is worsen in long transmission.
8. Because the quality of the CAT5/6 cables has the major effect on how long the transmission limit can
achieve and how good is the received picture quality, the actual transmission range is subject to one's
choice of Cat-5/5e/6 cables. For desired resolutions greater than 1080i or 1280x1024, a Cat-6 cable is
recommended.
9. If your HDMI display has multiple HDMI inputs, it is found that the first HDMI input [HDMI input #1]
generally can produce better transmission performance among all HDMI inputs.

9
RJ45 / CAT5 PIN DEFINITION
Audio/Video Port
Control Channel Port

10
WARRANTY
The SELLER warrants the CV-57C HDMI Extender over Dual Cat.X with IR free from defects in the
material and workmanship for 1 year from the date of purchase from the SELLER or an authorized dealer.
Should this product fail to be in good working order within 1 year warranty period, The SELLER, at its
option, repair or replace the unit, provided that the unit has not been subjected to accident, disaster,
abuse or any unauthorized modifications including static discharge and power surge. This warranty is
offered by the SELLER for its BUYER with direct transaction only. This warranty is void if the warranty
seal on the metal housing is broken.
Unit that fails under conditions other than those covered will be repaired at the current price of parts
and labor in effect at the time of repair. Such repairs are warranted for 90 days from the day of reshipment
to the BUYER. If the unit is delivered by mail, customers agree to insure the unit or assume the risk of loss
or damage in transit. Under no circumstances will a unit be accepted without a return authorization
number.
The warranty is in lieu of all other warranties expressed or implied, including without limitations, any
other implied warranty or fitness or merchantability for any particular purpose, all of which are expressly
disclaimed.
Proof of sale may be required in order to claim warranty. Customers outside Taiwan are responsible
for shipping charges to and from the SELLER. Cables and power adapters are limited to a 30 day
warranty and must be free from any markings, scratches, and neatly coiled.
The content of this manual has been carefully checked and is believed to be accurate. However, The
SELLER assumes no responsibility for any inaccuracies that may be contained in this manual. The
SELLER will NOT be liable for direct, indirect, incidental, special, or consequential damages resulting
from any defect or omission in this manual, even if advised of the possibility of such damages. Also, the
technical information contained herein regarding the CV-57C features and specifications is subject to
change without further notice.