Canon XF400 Instruction Manual page 114

About the Network Functions
NOTES NOTES
• About the Wi-Fi antenna: When using the camcorder's Wi-Fi
functions, do not cover the Wi-Fi antenna with your hand or
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other object. Covering it may interfere with wireless signals.
• Do not lay cables connected to the SDI OUT terminal (m
only) or HDMI OUT terminal near the Wi-Fi antenna. Doing so
may negatively affect the wireless communication over Wi-Fi.
• Do not open the SD card compartment cover while using
network functions.
Wi-Fi antenna