Fomotech Alpha 3000 Series - How to Change Transmitter Channels

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For example: Change from channel 201(301.105MHz) to 202(301.130MHz).
1. Pull out the power key.
2. Unscrew and disassemble the transmitter bottom casing then you will see the encoder board as below
Fig. 1.
(Fig.1)
3. Take out one of the batteries.
4. Find the DIP3 that is set as channel 201 (00000001) as shown on Fig.2.