Canon EOS-1D X Mark II Manuel

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If the transmission rate drops, the connection is lost, or other problems 
occur when using the communication function, try the following 
corrective actions.



When using the transmitter indoors, install the device in the same 
room where you are shooting.



Install the device higher than the transmitter.



Install the device where people or objects do not come between it 
and the transmitter.



Install the device as close to the transmitter as possible. In 
particular, note that during outdoor use in poor weather, rain may 
absorb radio waves and disrupt the connection.

If the transmission rate of a wireless LAN drops because of the 
influence of the following electronic devices, stop using them or 
establish a connection further away from them. In addition, switching to 
a wired LAN can resolve the problem.



The transmitter communicates over wireless LANs via 
IEEE 802.11n/g/b 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 terminal on the same frequency band as the 
transmitter is used nearby, the transmission rate of the wireless 
LAN may drop.