I tried using the wireless HDMI extender 'VGA-EXWHD9' that can wirelessly transmit images from PCs and game consoles with super-easy operation.
When holding a conference or recital, you can use a long and heavy HDMI cable to output video to a distant device, or you can use one HDMI cable for multiple people to connect a PC and a projector. There should be many people who have encountered the situation 'I wish I could transmit the video of the PC wirelessly ...'. If you use the wireless HDMI extender 'VGA-EXWHD9 ' that has appeared from Sanwa Supply, you can actually use it to transmit video wirelessly just by connecting a small main unit to the device on the receiving side and the transmitting side. I checked the quality and usability of the transmitted video.
VGA-EXWHD9 [Wireless HDMI Extender] | Sanwa Supply Co., Ltd.
·table of contents
◆ Opening & appearance
◆ Wireless connection between PC and display
◆ I tried to wirelessly output images from various game consoles
◆ Opening & appearance
The 'VGA-EXWHD9' package looks like this.
When I opened the package, two types of devices, 'receiver' and 'transmitter', appeared.
The package contained a receiver, transmitter, HDMI extension cable x 2, USB Type-A on one side, and USB Micro-B USB cable on one side x 2, and instructions.
The receiver looks like this. An HDMI terminal is mounted on the tip, and another button and a foldable antenna are mounted.
When you deploy the antenna, it looks like this. There is a vent in the part hidden by the antenna.
The model number, technical suitability mark, serial number, etc. are written on the back side.
The USB connector for power supply is located on the left side when viewed from above.
There are no buttons or connectors on the other side.
There was nothing on the other side of the HDMI terminal.
The HDMI terminal looks like this.
In order to check the size of the receiver of 'VGA-EXWHD9', I put it side by side with a general USB memory. The dimensions of the receiver are width 32 mm x length 83 mm x height 13 mm.
The appearance of the transmitter is the same as the receiver except that it is marked 'transmitter' at the top.
◆ Wireless connection between PC and display
Let's actually use the 'VGA-EXWHD9' to wirelessly transmit video
First, prepare for the side that receives the video. Expand the receiver's antenna and insert the HDMI terminal into the HDMI connector on the display.
Next, you need to power the receiver with a USB cable. If the display has a USB Type-A connector, you can supply power from the display to the receiver, but since the display used this time did not have a USB Type-A connector, prepare an AC adapter. I will supply power.
In the case of the display used this time, if the receiver was left inserted in the HDMI connector, it would interfere with the display body and the USB cable could not be connected, so I used the included HDMI extension cable to avoid the interference. ..
The wiring on the receiving side looks like this. The receiver is connected to the display via an extension cable and the AC adapter is used to power the receiver.
If you wait for a while in this state and the button on the receiver flashes blue, the preparation on the receiving side is complete.
When the receiver was ready, the Sanwa Supply logo was displayed on the display.
Next, prepare for the side that sends the video. This time, I inserted the HDMI terminal of the transmitter into the HDMI connector of the notebook PC and supplied power to the transmitter from the USB connector of the notebook PC.
Wait for a while, and if the transmitter button flashes blue, the transmitter is ready.
All you have to do is press the button on the sending side ...
Like this, I was able to wirelessly transmit video from my laptop to the display.
The maximum supported resolution of 'VGA-EXWHD9' is 1920 x 1080 pixels (Full HD). This time, I sent the video from a notebook PC that supports 4K output to a display with 4K resolution, but I couldn't send the video beyond the supported resolution.
With 'VGA-EXWHD9', you can switch the video output on and off by pressing the button on the transmitter. When I actually tried switching, switching from output on to off was instantaneous, and switching from off to on took 1 to 2 seconds. In the following movie, you can see how the video output is switched on and off continuously.
Switching video output on / off with Sanwa Supply's wireless HDMI extender 'VGA-EXWHD9' --YouTube
The specifications of 'VGA-EXWHD9' state that a delay of 100 milliseconds (0.1 seconds) or less will occur. When I actually entered characters and browsed the website while watching the video transmitted wirelessly with 'VGA-EXWHD9', there was a delay that made me feel uncomfortable with the delay in the video display. In the following movie, you can see how the image displayed on the display is delayed when scrolling up and down the top page of GIGAZINE.
The delay of the wireless HDMI extender 'VGA-EXWHD9' looks like this-YouTube
Also, in the environment where I tried using 'VGA-EXWHD9' this time, it was confirmed that the color of the image changes slightly during wireless transmission and the outline of the characters bleeds. The image below is a close-up photo when the video is wirelessly transmitted from a PC to a full HD display using 'VGA-EXWHD9' on the left side, and the close-up photo when the same video is connected by wire with an HDMI cable on the right side. it is a photo. If you move the slider left and right and compare them, you can see that there are parts with different colors.
When I inquired about the phenomenon of color change and the phenomenon of bleeding of the outline of characters to Sanwa Supply, he said, 'There is a possibility that the surrounding radio wave condition is affecting.' When observing the communication of 'VGA-EXWHD9 ' with the SDR 'HackRF' actually developed as open source, the frequency band used for communication by 'VGA-EXWHD9' is used for Wi-Fi communication of 5GHz. It was confirmed that it overlaps with the frequency band to be used.
As mentioned above, 'VGA-EXWHD9' has problems such as 'a noticeable level of delay occurs when inputting characters' and 'different colors are output', so it is common for office work and photos / movies. Not suitable for viewing. However, since it is possible to wirelessly transmit video up to 15m with a simple operation of connecting a cable and pressing a button, it seems to be effective in applications such as slide presentations where delay and color change are not a problem.
In addition, 'VGA-EXWHD9' can connect one transmitter to up to 20 transmitters and display images while switching the transmitter, so by preparing multiple transmitters sold separately, it is possible to display images. It is also possible to switch and display the PC images of the participants of the conference or presentation one after another.
◆ I tried to wirelessly output images from various game consoles
'VGA-EXWHD9' can wirelessly transmit video not only from PCs but also from devices that support HDMI video output such as game consoles and digital cameras. This time, I will try to wirelessly transmit the images of three types of game consoles
First of all, I tried to wirelessly transmit the video of Nintendo Switch.
The wiring looks like this. Since the transmitter does not fit in the dock, it is connected via an extension cable and power is supplied from the USB connector of the dock.
Wireless transmission from Xbox Series X was also successful without difficulty.
Power is secured by connecting to the USB connector on the back of the main unit. As long as there is enough space on the back, there is no need to use an extension cable or USB adapter, so the wiring is simple.
Finally, try wireless transmission from PlayStation 5. I succeeded in wireless transmission, but ...
Unlike the Nintendo Switch and Xbox Series X, power could not be supplied from the USB connector of the main unit. Wiring becomes complicated because an AC adapter is required to supply power.
We have actually succeeded in wirelessly transmitting images from three types of game consoles to the display, but the 'VGA-EXWHD9' has problems such as anxious levels of delay and color changes, so a quick reaction is required. Not suitable for playing shooting games and RPGs with beautiful graphics. However, it may be useful when playing games such as command-type RPGs where delays and color changes are less likely to be a problem.
The standard price of 'VGA-EXWHD9' is 85,800 yen including tax, and it is available at Amazon.co.jp for 52,000 yen at the time of article creation.
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