Canon Wireless File Transmitter WFT-E2 II A マニュアル

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When using the transmitter with a wireless LAN, try the following corrective actions if the 
transmission rate drops, the connection is lost, or other problems occur.
 
When using the transmitter indoors, install the wireless LAN device in the same room 
where you are shooting.
 
Install the wireless LAN device higher than the transmitter.
 
Install the device where people or objects do not come between it and the camera.
 
Install the device as close as possible to the camera. In particular, note that during 
outdoor use in poor weather, rain may absorb radio waves and disrupt the connection.
If the transmission rate over a wireless LAN drops because of interference from the following 
electronic devices, switching to a wired LAN can resolve the problem.
 
In IEEE 802.11b/g wireless networks, the transmitter communicates using radio waves in 
the 2.4 GHz band. For this reason, the wireless LAN transmission rate may drop if there 
are nearby microwave ovens, cordless telephones, microphones, or similar devices 
operating on the same frequency band.
 
If a wireless LAN device on the same frequency band as the transmitter is used nearby, 
the transmission rate of the wireless LAN may drop.
 
If multiple transmitters are connected to a single wireless LAN device, be careful not to 
use duplicate camera IP addresses.
 
Note that the transmission rate drops when multiple transmitters access a single wireless 
LAN device.
 
To reduce radio wave interference when using multiple transmitters and wireless LAN 
devices in the same area, it is advisable to use three groups of devices or fewer. In this 
case, leave a gap of four channels between each wireless LAN channel. For example, 
use channels 1, 6, and 11; or channels 2, 7, and 12; or channels 3, 8, and 13.
When IEEE 802.11a can be used, switch to IEEE 802.11a and specify a different channel.
 
Wireless LAN radio waves can be easily intercepted. For this reason, we recommend 
activating encrypted communication in the wireless LAN device settings.
Wireless LAN Notes
Wireless LAN Device Installation and Antenna Position
Nearby Electronic Devices
Using Multiple Transmitters
Security
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