Antiference

TEST REPORT HDMI Extender

Antiference
Wireless
HDMI
Extender
• supports HDMI 1.3 and HDCP 1.2
for all HDMI compatible TV panels
• wireless transmission of HDTV up to
30 m
• perfect video quality – no difference
to connection with HDMI cable
• even transmits infrared commands
sent from the remote control to a
connected receiver
• thanks to integrated EDID protocol
video resolution is negotiated
automatically between devices

42 TELE-audiovision International — The World‘s Largest Digital TV Trade Magazine — 01-02/2013 — www.TELE-audiovision.com www.TELE-audiovision.com — 01-02/2013 — TELE-audiovision International — 全球发行量最大的数字电视杂志 43

TEST REPORT HDMI Extender

Wireless
We’re all faced with a simi- tion, this of course comes at mission at all? There was
lar scenario: UHF modula- a price and further stretches only one way to find out – get
tors, coax cables, RCA ca- the family budget. It gets the system and give it a try!

transmission
bles, analog transmitters and even more complicated if we Antiference’s Wireless
so on are just some ways for decide to watch the latest HDMI Extender consists of
an average user to hook up movie out in the garden on two modules, which take
an additional TV in the bed- a warm summer night, since care of transmission and re-

of HDTV signals room, terrace or garden to
an existing pay TV receiver,
DVD player, satellite receiver
or games console in the liv-
we also have to think about
signal distribution in the first
place. As long as we’re happy
with terrestrial TV this is a
ception. As far as appearance
goes, they look like your av-
erage Ethernet switch. This is
hardly surprising given their
ing room. problem that can easily be size, which is 148 x 98 x18
The list could go on for- solved, but what about satel- mm and thus could easily be
ever, and every single option lite TV? Do we really want to mistaken for a network hub.
comes with a major draw- roll out thick coax cables all In order to make sure the
back – full HD transmission over the place? integrated antennas of the
with up to 1920x1080 pixels Well, we don’t need to any two modules can operate at
is not possible without using longer! This test report will full capacity the manufac-
a cable-bound route. So up introduce you to the Wireless turer ships both devices with
until now pay TV providers HDMI Extender from Antifer- supporting feet, which not
have been taking our money ence. only take care of safely po-
■ TELE-audiovision test every month, yet the only When we first heard about sitioning the modules where
editor Thomas Haring place where we could actu- a new solution for wireless they are required, but also
enjoying HDTV on the
terrace, completely without ally enjoy their HDTV offer- transmission of 1080p sig- optimise the transmission
cables (other than for power ing has been the living room. nals we were a bit sceptical, and reception quality of the
supply). While some providers offer to put it mildly. Is current overall system. Apart from all
a second receiver and smart- consumer technology capa- this highly welcome function-
card for a single subscrip- ble of such a highly loaded ality, we did appreciate the

01-02/2013
Antiference Wireless
HDMI Extender
Perfect solution for wireless HDTV in your
house or apartment

www.TELE-audiovision.com/13/01/antiference

0.53


1

fact that the manufacturer signal from the receiver trav-
also thought about a smart el wirelessly to your TV pan-
design for its product. Trans- el, but commands sent from
mitter, receiver and support- the remote travel back to the
ing feet all come with a shiny receiver as well – two-way
white surface and create a communication at its best.
low-key yet stylish overall In order for that to work
appearance. the Wireless HDMI Extender
2 Both the transmitting and converts the infrared signal
the receiving modules come from your remote into a digi-
with two status LEDs indicat- tal signal that is first sent to
ing an established connec- the transmitting module and
tion between the modules then transformed back into
and a receiver or TV that is an infrared signal which is
connected via HDMI. finally sent to the receiver
Our test showed that a from there. Sounds compli-
third LED would have been cated, but works wonder-
welcome to light up every fully.
time the system is connected In the outer left corner of
to the mains and ready to both modules you can find a
operate. The reason for this flush mini-switch which can
is that none of the two LEDs be used as a sort of range
3 is active unless a connection extender for the wireless sig-
between the two modules nal (albeit with reduced video
has been established and so signal quality) and for logi-
you never know whether the cally linking up two or more
system is turned on at all. modules in the first place in
And while we’re at it, a sig- order to get going.
nal bar indicating the signal The back panel of both
level at the receiving end modules sports an HDMI port
would have been very handy and a socket for connecting
as well. the external 5V power pack.
On a truly bright note, the In addition, the transmitting
4 manufacturer treated the module features a socket for
reception module to an in- the external infrared trans-
tegrated infrared receiver mitter, while the receiving
on the front panel, which end comes with a mini-USB
means you can use your report.
mote control on the terrace Antiference ships the sys-
or in the garden the same tem with a concise manual
way you would right in front which will tell you everything
of the telly in the living room. you need to know to set up
So not only does the HDTV the system and which comes
with useful illustrations
5 1. The receiving module of where required. We were
the Wireless HDMI Extender
has successfully established absolutely impressed by the
a connection with the build quality of this signal ex-
transmitting module. An tender, which met all of our
on-screen message confirms
this to the user. – admittedly rather high –
2. Wireless transmission of a demands.
HDTV signal from a receiver to Now that we knew about
the TV – thanks to the Wireless any nook and cranny of its
HDMI Extender.
outside appearance it was
3. The receiving module of the time to have a closer look
Wireless HDMI Extender tries
to establish a connection with at the technology behind
6 the transmitting module. the Wireless HDMI Extender
4. The receiving module of from Antiference.
the Wireless HDMI Extender Transmissions take place
has successfully established
a connection with the in the 5 GHz range, or be-
transmitting module. There is, tween 5.1 and 5.9 GHz to be
however, no incoming signal at more precise. We find that’s
the moment.
a smart choice by the man-
5. The receiving module
of the Wireless HDMI ufacturer, since the overly
Extender is currently not popular 2.4 GHz range has
logically connected with any become a bit crowded with
transmitting module.
all the countless WiFi rout-
6. HDTV content with a ers, analog transmitters, mi-
resolution of up to 1080p
can easily be transmitted crowaves and other devices
wirelessly. in recent years.

46 TELE-audiovision International — The World‘s Largest Digital TV Trade Magazine — 01-02/2013 — www.TELE-audiovision.com

The 5 GHz band was only ti output) method is used for corner of the room provided outdoor use. So we were left technology used. be activated by pressing the
released for public use in signal transmission, which a crystal clear 1080p signal with no other choice than to In our tests at different lo- button on the front panel of
TECHNICAL
DATA
2009 and offers a total of 19 means multiple antennas are to the TV panel in the oppo- find out ourselves. cations we achieved a maxi- both modules.
Manufacturer Antiference Limited
separated channels without built into both the transmit- site corner of the room com- Using a small LCD TV we mum transmission distance Naturally, we wanted to try
Email sales@antiference.co.uk
overlap (as opposed to mere- ting and receiving modules pletely without a cable. moved out into the garden of 20 meters across thin that out as well, but in our
ly three 2.4 GHz channels), using a total of four different Since we’re talking about of our editorial offices and partition walls and just a lit- test the range remained un- Internet www.antiference.co.uk

which can be used by devices channels. In addition OFDM strictly digital transmission mounted the transmitting tle over 12 meters when the changed no matter how of- Model Wireless HDMI Extender (5002JH)
such as the Antiference Wire- (Orthogonal Frequency Divi- there is no video noise or module on a window facing signal had to travel through ten or how hard we pressed Function Wireless HDMI Transmitter & Receiver
less HDMI Extender. In addi- sion Multiplexing) allows for similar interference and the the garden. The distance be- massive brick walls or rein- those buttons. In addition, Transmission Frequency 5.1 - 5.9 GHz
tion, the higher frequency in optimum error correction wireless signal we received tween the two modules was forced concrete. In actual the expected on-screen mes- Frequency Stability +/- 4 PPM
combination with improved and limits the risk of outside was 100% identical to a sig- 27 meters without any ob- fact, these results are more sage indicating the range
Bandwidth 40 MHz
error correction routines al- interference with the signal. nal we would have received struction, and the Wireless than acceptable, but can only extender mode did not pop
Transmission Power >= 12dBm
lows for data rates of up to Now that we had run with a direct cabled connec- HDMI Extender achieved its be achieved if the transmit- up either. According to the
600 Mbit/s, which also com- through all the techni- tion between receiver and mission brilliantly. We were ting and receiving modules manual the increased range Receiving Sensitivity <= -75dBm

pare extremely favourably cal specifications, we could TV. able to watch flawless HDTV are not physically blocked by comes at the cost of de- System Latency <= 1ms
to the 54 Mbit/s that can be hardly wait to see the sys- Commands sent via in- without any noticeable inter- other items and if no other creased video quality, which Sending/Receiving Channels 4 channels for sending, 1 channel for receiving
achieved using the 802.11a tem at work. To that end, we frared from the remote also ference. It was only when devices emitting high elec- was another thing we did not HD Video Protocol HDMI 1.3
standard in the 2.4 GHz connected a HDTV satellite reached our receiver flaw- we increased the distance tromagnetic radiation (such notice. HD Video Encryption Protocol HDCP 1.2
range. receiver to the transmitting lessly so that in terms of user to more than 40 meters that as WiFi routers in the 5 GHz The Wireless HDMI Extend-
RF Communication System MIMO
The Wireless HDMI Extend- module and a 42-inch LED TV experience there was no dif- the LED indicating a success- range, for example) operate er from British company An-
Modulation Mode OFDM
er itself can deal with resolu- to the receiving module. ference whatsoever between ful connection between the in the immediate vicinity of tiference is an innovative so-
tions all the way up to 1080p For our test purposes, both our set-up and a convention- modules stayed dark. the modules. lution we’ve been waiting for Unobstructed Effective Range >= 30m

60 Hz Full HD (which means devices were positioned in al installation using cables. Thus we can confirm that Even when the receiving for ages. At long last wireless Power Supply 5V
a maximum of 1920x1080 the same room so we expect- Wireless transmissions the Antiference Wireless module of the Wireless HDMI transmission of HDTV signals Dimensions 148 x 97 x 18 mm
individual pixels) and sup- ed a successful transmission from one corner of a room HDMI Extender performs Extender does not receive for private use has become Operating Temperature -10°C to 50°C
ports HDMI 1.3 as well as at any rate. And so it was: A to another are nice and con- as specified when used out- a signal from the transmit- reality. Operating Humidity 15% to 85% RH
the HDCP 1.2 protocol for few moments after we had venient, but hardly a techno- doors and with optimum po- ting module it still gives out Thanks to using 5 GHz
copyright protection. Thanks powered up both modules of logical breakthrough, so we sitioning of the transmitting on-screen messages via its technology the system is
to also supporting the EDID the Wireless HDMI extender wanted to find out next how module. HDMI port indicating poten- capable of transmitting high ENERGY
(Extended Display Identifica- all LEDs lit up in green to in- much the distance between What about indoor use? tial problems. Once a con- data rates while at the same DIAGRAM
tion Data) protocol it is possi- dicate that (a) a connection transmitting and receiving To start with, it all depends nection has been established time being reasonably inter-
ble for TV panel and receiver had been established be- modules could be increased on the type of walls within the signal strength is given ference-resistant, not least Mode Apparent Active Factor
Active 13 W 7W 0.53
to wirelessly arrange for the tween the transmitting and without compromising signal a building, since a thin dry- via HDMI. due to MiMo and the ODFM no Signal at Sender 9W 5W 0.55
best possible display resolu- the receiving end and (b) a quality. wall obviously will let through In our test, however, this modulation standard used. no Signal at Receiver 9.5 W 5.5 W 0.57

tion and to make sure users HDTV device was connected In the technical specifica- considerably more signals signal indicator only showed Very good transmission
can enjoy optimum video to each module. All that was tions the manufacturer states than a massive wall made of full strength or no signal, so and reception results can be Apparent Power

quality with the hardware at left to do for as was to turn a maximum of 30 meters, yet reinforced concrete. The re- it was not possible to check achieved with the Wireless
hand. on the TV to witness first- does not specify whether this sults will invariably differ, but how the signal changed with HDMI Extender, both indoors
The MiMo (multi input/mul- hand how the receiver in one distance refers to indoor or this is not to blame on the increased distance, for ex- and outdoors, and thanks to
Active Power
ample. loss-free digital transmission
The manual of the Wireless the video quality is excellent
HDMI Extender comes with a and just as sharp as with a
hint regarding a built-in range conventional connection us-
extender function, which can ing cables.

Active use of transmitting module during the first 15 minutes,
Expert Opinion followed by 15 minutes measured at the transmitting module
without video input signal, and another 15 minutes measured at
Perfect and loss-free signal transmission the receiving module without video input. Power consumption of
the receiving module with video output corresponds to the values
within the distance specified by the manu- measured at the transmitting end.
facturer. Fit for future use thanks to 5 GHz
frequency range and ready to be used at any More about this company
+
www.TELE-audiovision.com/12/11/antiference
location. The Wireless HDMI Extender is ext-
Thomas Haring
remely easy to set up and use and will add TELE-audiovision
Test Center
some shine to any TV rack. With its support of Austria

HDMI 1.3 and HDCP 1.2 it is compatible with all
HDMI devices and with the help of the integrated EDID proto-
col all connected devices can communicate with each other
to negotiate the best possible screen resolution. All this is
rounded off by a brilliant infrared receiver in the receiving
module which can be used to remotely control any receiver
with a conventional 38 kHz IR system in place.

No status LED to indicate power supply, no signal strength

– indicator on the receiving module. The range extender mode
could not be activated. The on-screen signal strength display
does not give out meaningful values.


Antiference

More Related Content

What's hot

Viewers also liked

Similar to Antiference

More from TELE-audiovision eng

Antiference