Huawei E510 Quick Start Manual page 6

External antenna interface
Connects an external antenna. You can pull out the external antenna as shown in the following
figure. To receive stronger signals, you can adjust the direction of the rotatable external antenna.
Note:
The internal and the external antennas cannot be used at the same time. When the external
antenna is connected to the E510, you are not recommended to pull out the internal antenna.
It is recommended to use the external antenna at the site with weak signals.
When you want to watch TV programs of VHF, the external antenna should be connected to
the E510.
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