Satellite Receiver and Wireless AV Extender Transmitter/Receiver

Article from: Satellite Receiver and Wireless AV Extender Transmitter/Receiver


Satellite Receiver is signal source for av sender(known av av extender), AV Sender can not getting signal if no satellite receiver or set top box, it’s just a converter device. 

As the following picture, this is satellite receiver connection port, there is LNB IN Port, USB Port, HD out Port, RCA/AV Port, Coaxial Port and DC Port. 

The following picture is our popular wireless tv sender PAT-220, there is IR Cable Port, Switch , RCA/AV Port, DC Port. 

When you get wireless av extender and satellite receiver, you should connect the wireless tv sender with satellite receiver by RCA/AV cables by correct connection method, please noticed, the Yellow Port is for transmit Video signal, White and Red is for transmit Left and Right Audio signal Port, please do not connection with wrong port, or it will not work. 
Connection is very easy, but we need to pay attention also, any other questions about av sender and satellite receiver, welcome to leave message at Pakite official website: pakite.net


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PAKITE Wireless AV Sharing Device, the best plan for one pcs DVD and many pcs TV

Article from: PAKITE Wireless AV Sharing Device, the best plan for one pcs DVD and many pcs TV

Now, digital signal has instead analog signal in most cities.  In the TV set up a digital set-top box, there is no problem for one pcs set-top box output two or three groups av signal, but factory only set up one group av output for get more profit. You must purchase two or more pcs set-top box if you have many pcs TV. One pcs set-top box cost 400-500RMB, and we have to pay the extra fee for the signal, it’s a big deal for long time.

Several days ago, someone order one set wireless tv transmitter and receiver from PAKITE, he said this device support one pcs DVD av signal sharing to two or more pcs TV, but the same program. Made a careful study of the wireless sharing device, wireless sharing device is a breakthrough of set-top box, this device allows multiple TV viewing of a set-top box at the same time show the most convenient way, if you have many pcs of TV then you just need to buy several receivers, besides it’s wireless transmission, saving wiring trouble family tedious. We need to connect the RCA cable between transmitter and set-top box, receivers connect with TV, then we can review the program at another room. At first I am worries about the latency or other problems, but it works well, clear picture, good sound, and the seller provide the favorable price. It’s small size and easy installation, I would prefer to order one sets again. PAKITE provide professional suggestion according my using environments, it’s a good product and famous company in AV Sender flied.

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Black Model PAT-240 Wireless AV Sender

PAT-240 is one of Digital Series Wireless AV Sender from Chinese brand PAKITE, but it doesn't means it only for transmitting digital signal.

PAT-240 has RCA Jack for connect with signal source, it can transmit both digital signal and analog signal; this model Wireless TV Sender has 250 meter transmission range at line of sight, if their has obstacle then can not transmit 250m distance.

 

PAT-240 Wireless TV Sender support used at different rooms, if transmitter were placed at first room, receiver were placed at second rooms, PAT-240 Wireless TV Sender support, but u have to make the transmitter and receiver get more as closely as possible, the range should be not over 25meter after passed one wall; besides, even if the satellite receiver and television ware placed at different rooms, also you can change channels at tv end. That's the function of Wireless TV Sender.

• Read also, Compare Wireless TV to TV Sender Model PAT-220 and PAT-330
• PAKITE PAT-635 provides you with a more stable and smooth audio-visual experience
  

PAT-240 transmission range is between PAT-220 and PAT-260, the other parameter is same, so many user will confuse this series which model is best suitable for him. If  PAT-220 we would suggest use in the same room or next room but transmission within 10 meter, if for PAT-260 we would suggest use in different floor and keep the transmission range no more over 10 meter, if you would use PAT-260 at the same floor, then PAT-260 support penetrate 3 walls.

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The difference between 480P 720P 1080P

Sources: The difference between 480P 720P 1080P

SD(Standard Definition)

Standard Definition: physical resolution of 720p video format. 720p refers to the video vertical resolution of 720 lines progressive scan. Specifically, SD means the resolution about 400 lines of VCD, DVD, TV programs and other "standard definition" video format, the standard definition. While the physical resolution up to 720p or more is known as HD ( High Definition) .On the high-definition standards, internationally recognized there are two standard: video vertical resolution of more than 720p or 1080i; video aspect ratio of 16: 9.

HD(High Definition)

Digital TV (HDTV) 720p, 1080i, and 1080p are high-definition standard formats defined by the Society of Motion Picture and Television Engineers, 1080p called the current top-of-the-line display format for digital televisions in progressive-scan 1920 × 1080 resolution. At present, only the  screen size over 60-inch can display the signal 1920 × 1080 resolution. Where I means  interlaced scanning, P means progressive scanning.  Simply , to show the effect, 1080p> 720p> 1080i. Of course, in 20-inch computer LCD screen, there is no difference.

FHD(Full HD)

Full HD:  the physical resolution up to 1920 × 1080 display (including 1080i and 1080P), where i (interlace) refers to interlaced; P (Progressive) represents progressive scan, the Fine degree in those two picture has a big difference, 1080P picture quality is better than 1080i. then 720 is called standard HD. Obviously,  the 1080 resolution is more advantages in large-screen TV, 1080 to ensure a clearer picture quality, but for small screen size tv, there is no big difference.


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Audio and video signals getting interference

Author: pakite

In IP network monitoring system, between audio and video signals exist interference problems .Although the audio and video signal data in the same IP network to separate the transmission, there is no interference in theory, but in the installation should consider the location of the connection.For example the wiring distance should be with the radio transmitter, the high voltage cable and the old street lamp.
Analog camera's audio and video system integrationcan use shielded cable to prevent signal interference . Use independent transmission cable is a very necessary stepin analog monitoring system.Most of the signal interference is caused by the distance from the high voltage cable. It is recommended to use the multi audio encoder, the most critical is to ensure that the lowest line of analog signal wiring.

Monitoring system,external microphone, speaker deployment is too dense also would cause sound interference , echo occurs in the audio input and output sound cycle, in order to avoid this kind of echo, installation the microphone and loudspeaker in a reasonable position, and another method is through a special codec to eliminate echo, using digital filter to eliminate audio echoes.

The security industry focused on video management, which is helpful for security work. Video information can help managers assess the surrounding events, on the other hand, the characters in the video facial expression to achieve a visual clue. At present, audio analysis is gradually added to the video monitoring system, the most popularapplication is the visual access audio and video intercom system, in order to carry forward in the security industry, but also to broaden its scope of application.

In the market promotion of audio application does not smooth. This integrated solution does not enable users to understand the true strength. Video analysis technology can scan the situation at that time by software, it can be achieved even if it’s in the conversation. But it cannot reach the real audio scene, so the application is not popular.

It takes a period of time to change people's thoughts about audio and video integration . First, customer should knows the capabilities and limitations of audio analysis . Audio analysis can serve as an warning system, but the procedures still need to capture video, then people react quickly, VMS integrated system is capable of handling a series of problems, need a few seconds to determine whether subsequent decision.


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• HDMI 1.3 and HDMI 1.4 Interface | PAKITE

What is HDMI Port

Author: pakite

HDMI (Full name: High Definition Multimedia Interface), HDMI is type of Digital Audio/Video Connection Jack, it’s for transmission digital AV Signal , HDMI could transmission audio and video at the same times, The maximum data transmission speed is 5Gbps. And it’s no need to convert Digital to Analog or Analog to Digital signal before transmission. HDMI also support HDCP(High -bandwidth Digital Content Protection) to prevent unauthorized copying of copyrighted audio and video content. The extra space available in HDMI can be used in future audio and video formats. And because a 1080p video and an 8-channel audio signal needs less than 4Gbps, so there is a lot of storage . This allows it to connect the DVD player, receiver and PRR with a single cable.

HDMI advantages

HDMI not only meet the resolution of 1080P, but also supports DVD Audio and other digital audio formats, support for eight-channel 96kHz or 192kHz stereo digital audio transmission. HDMI support EDID, DDC2B, so HDMI devices support "plug and play", between the source and the display will automatically "negotiate", automatically select the most appropriate video / audio formats. Compared with DVI , HDMI interface with smaller size, DVI cable length can not exceed 8 meters, otherwise it will affect the picture quality, and HDMI can be transmitted up to 15 meters. As long as an HDMI cable, you can replace up to 13 analog transmission lines, can effectively solve the home entertainment system behind the connection tangled problem.

HDMI development

HDMI Licensing, LLC released HDMI Specification Version 1.4a on March 4, 2010, featuring key enhancements to 3D applications on behalf of HDMI Original Developers,  the inclusion of mandatory 3D formats for broadcast content, and the  Top-and -Bottom's 3D format. As the "HDMI 1.4" no clear boundaries , can not display the specific support of the device technology, so in this specification completely ban the use of "HDMI version 1.4" of this version number identification method. According to the new version of the "Trademarks and Logo Usage Guidelines", HDMI cable manufacturers prohibit the use of version numbers when selling and promoting HDMI version 1.4 cables. Older cables should be removed within one year from all versions identified by the version number Labels, instructions, packaging and so on.

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The difference between Smart series and Wireless series tv sender

Right now, PAKITE had develop three series wireless tv sender (also known as wireless av sender, Digisender, or wireless video transmitter), so let’s check two series difference between Smart series and Wireless series av sender.

Smart series av sender, let’s take a example av sender model PAT-226, PAT-226 is 2.4Ghz frequency band, support 150 meter transmission range at line of sight, support both digital and analog signal transmission, support 38/56khz infrared remote control, PAT-226 support two group av input.

Wireless series av sender, let’s take example av sender model PAT-330, PAT-330 is 2.4Ghz frequency band, support 150 meter transmission range at line of sight, support both digital and analog signal transmission, but do not support ir remote control.PAT-330 only support one group av input.

PAT-226 support ir remote control, so the unit price will be much higher than PAT-330, it doesn’t means PAT-226 quality is much better, both quality is good. But as for the function PAT-330 without ir remote control is more favorable for cctv camera user, PAT-226 support ir remote control is much convenient for tv user change channels.

Besides, if av sender PAT-330 connect with cctv camera, you may need one pcs BNC to AV converter, so you can connect the transmitter with cctv camera. As for av sender PAT-226, please noticed both transmitter and receiver should be connect with AV Jack also.

If any question about wireless av sender, welcome leave message at www.pakite.net .


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5.8GHz Wireless Audio/Video Sender with IR Remote Control Extender

Model number: PAT-556

·Work with digital TV set top box, send AV signal to any TV in any room. 

·Wirelessly transmit AV signal from Cable, Satellite, TV, DVD player, computer…. to any TV. 

·Work with camcorder as a wireless surveillance monitoring system. 

·IR extender controls source device remotely. 

·Local area broadcasting of AV programs from single source to multiple receiving units.

A wireless av sender allows you to transmit audio/video signals of cable, satellite, video camera, DVD player, VCR, projector, or computer, etc. from one room to another wirelessly. Pakite 5.8GHz audio video transmitter not only provides 300 meters wireless transmission (in open space), but what distinguish itself from other similar products is it avoid the interference from crowded 2.4GHz ISM band applications such as Wireless LAN, Bluetooth, Cordless Phone, etc. And the IR Remote Control Extender allows user to change source device's functions from the remote site. It can change the television channels from receiving location without going back and forth. Both primary and secondary TV have to display the same video program. Once the channel on either TV is changed, the other TV channel will be changed accordingly.

  The Wireless audio video sender will satisfy the transmission of A/V device . It enables you to easily realize wireless sharing of SD AV data and enjoy untrammeled hi-fi audio and visual effects. 

Artical from: 5.8GHz Wireless Audio/Video Sender with IR Remote Control Extender

Good news: PAKITE hdmi wireless transmitter with hdmi jack is coming soon, and the wireless tv transmitter hdmi is used for the TV device with hdmi port. Waiting for your inquiry about the hdmi wireless transmitter.


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Reviews of PAT-556 Wireless AV Transmitter Receiver

Reviews of PAT-556 Wireless AV Transmitter Receiver

　　 The “PAKITE PAT-556 5.8GHz Digital Wireless AV Transmitter Receiver with IR Extender” is a simple and effective way of watching programs from a satellite receiver, set top box or other in one room and a TV set in a different room. 

　　 This is achieved wireless without all the hassle of running additional cabling around the house and with the right conditions can work up to 300 meters range. A lot of home equipment, from routers to Bluetooth devices, use the 2.4GHz frequency band but this system uses the 5.8GHz ISM frequency band which is less prone to interference from other equipment and also offers better transmission quality – a bit like a dual band router does. 

　　It has a number of different selectable channels within the band so you may just need to find the one that works best in your location – a simple procedure.

　　　　This av sender is easy to setup. The back panels on the transmitter and receiver are clearly labeled, which makes setup easy. You simply connect the transmitter unit to the set top box and the receiver unit to the TV or monitor, you will be viewing on using the supplied cables. The Transmitter unit in effect becomes a mini TV transmitter and the Receiver unit becomes a TV tuner and works exactly the same way as your local TV transmitter in miniature. 

　　One nice feature with the device was the IR extender, which allowed me to operate my satellite receiver from another room. The way it works is cool. You plug the IR extender into the transmitter and then put the extender in front of the transmitting device's IR sensor. This is a convenient feature because it makes sense to want to operate the device you are transmitting while watching it.

　　The PAT-556 was supplied for evaluation and review purposes and I can offer an unbiased recommendation as a well made and effective video sender/receiver system.

Artical from: Reviews of PAT-556 Wireless AV Transmitter Receiver

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Shenzhen PAKITE Technology Co., Ltd.

Shenzhen PAKITE Technology Co., Ltd. since its establishment in 2008, has been committed to wireless audio and video transmission and wireless intelligent control technology.Tradition innovation and the pursuit of excellence, relying on research and development team continue to innovate and continue to invest advanced production equipment and meticulous quality effort. 

　　　　After years of development and practice of accumulation, gradually 2.4G wireless video transmission and 5.8G wireless video transmission,  wireless infrared signal forwarding, HDMI wireless video transmission, wireless intelligent control terminals and digital STB wireless sharing device and other consumer electronics products in the home audio and video, security monitoring, smart home applications market, formed a "PAKITE" own brand recognition at home and abroad, the products are exported to more than 100 countries and regions.

Artical from: Shenzhen PAKITE Technology Co., Ltd.

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Output power of an analog wireless TV sender

Output power of an analog wireless TV sender

The output power of a wireless TV sender( or wireless av sender ) is the electric power applied to antenna system. There are two definitions: nominal (or peak) and thermal. Analogue television systems put about 70% to 90% of the transmitters power into the sync pulses. The remainder of the av transmitter's power goes into transmitting the video's higher frequencies and the FM audio carrier. Digital television modulation systems are about 30% more efficient than analogue modulation systems overall.

    1 Analogue vs digital

    2 Power defined in terms of voltage

    3 Nominal power of a wireless TV sender

    4 Thermal power

    5 Ratio of thermal power to nominal power

Analogue vs digital

Analogue

    The large amount of energy that Sync Pulses use is largely independent of the measurement system and efficiency of the analogue wireless TV sender (as most analogue transmitters have on average 75% efficiency).

    The transmission of FM audio (including Stereo subcarriers) is only overall the 3rd largest consumer of wireless TV sender power.

    Power consumption (most to least) : Sync Pulses, High Frequency Video, FM Audio, Vestigial AM

Digital

    DVB like transmission systems, with their groups of mathematically related carriers are not quite as energy efficient as 8VSB systems

    8VSB transmission systems only provide a limited "Forced DC" signal (that consumes about 7% of the transmitters energy) that under multipath conditions can be lost causing a signal lock loss event

Power defined in terms of voltage

The average power for a sinusoidal drive is

For a system where the voltage and the current are in phase, the output power can be given as

In this equation "R" is the resistance and "e(t)"  is the output voltage

Nominal power of a wireless TV sender

Nominal power of a wireless TV sender is given as the power during the sync interval. (For the sake of simplicity aural power is omitted) Since, the voltage during the sync interval is a fixed value,

where "E" is the rms value of the output voltage.

To measure the nominal output power, measuring devices with time constants much greater than the line time are used. So the measuring equipment's measure only the highest level (sync pulse) of a line waveform which is 100%.

This power level is the commercial power of the transmitter.

Thermal power

In analogue TV broadcasting, the video signal modulates a carrier by a kind of amplitude modulation (VSB modulation or C3F). The modulation polarity is negative. That means that the higher the level of the video signal the lower the power of the RF signal.

The lowest possible modulating signal during the synchrone interval yields 100% of the carrier. (The nominal power of the transmitter.) The blanking level (300 mV) yields 73% (in an ideally linear transmitter). Usually the figure 75% is found to be acceptable. The highest modulating signal at white (1000 mV) yields only 10% of the carrier. (so called residual carrier). Sometimes 12.5% is used as the residual carrier so the output power applied to the antenna system is considerably lower than the nominal power.

The thermal power which can be measured by a microwave power meter depends on the program content as well as the residual carrier and sync depths.

Ratio of thermal power to nominal power

Since the program content is variable, the thermal power varies during the transmission. However, for testing purposes a standard line waveform can be applied to the transmitter.

Usually line waveforms corresponding to 350 mV or 300 mV black image (and without field sync) are applied to the input of the transmitter.

For System B, the duration of the black level 300 mV (together with the front and back porches), is 59.3 μs and it corresponds to 73% of maximum voltage level. The duration of the sync pulse is 4.7 μs. The total duration of the line is 64 μs.

So the maximum thermal power applied to the antenna system is 57% of the nominal power, even in the black scene. In normal program content this ratio may be around 25% or less.

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Intelligent Multimedia Conference Rooms System

With the continuous development of information technology and the ever-changing multimedia technology, allow us to build an integrated wireless audio and video system(A wireless av sender to be an audio/video signals sharing transmission device by wireless transmit of Smart Multimedia Conference Rooms System), multimedia conference function room needs to become a reality. In considering the traditional meeting requirements, but also with elegant style and beautiful sound, clear image presentation, convenient control, highly centralized management features.

Multimedia conference room system consists of usual/large-screen display, multimedia audio and video sources, audio, central switching and integrated control of several major components. Select the large screen projection DVD and computer and multimedia physical showcase of VGA, video signal is amplified to restore the image, through sound amplification system restore audio. In order to make more efficient and real-time control, equipped with an integrated central control device to the control room for all audio-visual equipment, signal switching, lighting, lift the screen, volume control and other functions, greatly improved the work efficiency and simplify complex operations, can be used for all people and without the need for specialized knowledge.

I. Overview

Digital video technology has gradually matured, and quickly change our lives, with the development of broadband Internet technology, digital video technology has been integrated into the video conference, the distal end of the medical, the distal end of education, remote monitoring, streaming media technology, and other aspect, and service in all walks of life, so for now, the digital video technology is undoubtedly a new economic growth point.

 II. The User Needs

The entire system to finish teaching task of high efficiency, combining with each system , give full play to the function of each system, complete intelligent video conferencing.

(A) Multimedia display system

Multimedia display system consists of high-brightness, high-resolution LCD projector and electric screen makeup; complete graphic information on a variety of large-screen display.

(B)A / V system:

A / V system consists of a computer, DVD, VCR (video cassette recorder), physical booth, the remote video conferencing systems, amplifiers, speakers, digital video recorders and other A / V equipment;

To complete a variety of graphic information (including the use of a variety of software, DVD / CD discs, video tapes, all kinds of objects, sound) playback functions; to achieve multi-function hall live sound, broadcast, with large-screen projection systems, It provides excellent audio and visual effects. And by DVR, the entire process can be recorded in the hard disk recorder, to facilitate future inquiries retrospectives.

(C) Meeting room environmental systems:

Conference room environment system consists of lighting the room (including incandescent, fluorescent), curtains and other equipment constituted; complete change of the whole room environment, the atmosphere, in order to automatically adapt to current needs; for example, when you play a DVD, the lights will automatically dim, curtain off automatically.

(D) Intelligent multimedia central control system:

Currently the highest grade, the most mature technology, the most complete, most widely used central control system, which is currently the most advanced central control system equipment. To achieve a variety of multi-functional conference hall centralized control of electronic devices.:

 *Requiring a simple, user-friendly, intelligent;

 *High reliability requirements of the entire system;

 *To achieve a high degree of automation, intelligent control, minimizing operational complexity of the operator, to achieve "a key place" type of control;

 *As much as possible reflect the best features of various devices, so that all equipment in the best condition, maximize the effectiveness of the device;

 *You can control the projector on / off, input switching, and other functions, and the ability to control the electric pylons, screen, achieve rise, stop, drop and other functions;

 *You can control the DVD, VCR to play, stop, pause and other functions;

 *You can control the document camera zoom in, zoom and other functions;

 *Can control the volume, the size of the sound volume adjustment function;

 *It enables audio and video signals, VGA signals automatic switching control function;

 *You can control room lights and curtains, automatically adapt to current needs;

Artical from: Intelligent Multimedia Conference Rooms System


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