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A-2. Passive Antenna
(1) Connector
(2) Receiver RF module
(1)
(2)
1. Remove original antenna from RF module.
2. Install Connector into the RF module and place the RF module up side down,
then soldering connector (4 pins) into RF module.
3. Short circuit two connecting points as bottom picture shown
Application:
To improve radio reception quality under certain severe environmental such as
tower crane, long-range conveyor, tunnel, and elevator etc, installing external
passive or dipole antenna may be required.