GMM-U1 Datasheet, PDF (25/36 Pages) List of Unclassifed Manufacturers – GPS Module

GlobalTop Technology
Gmm-u1 Data Sheet
External Antenna Application
25 _{Ver. V0G}
Notice:
1. Ferrite bead L1 was add for power noise reduction.
2. C1 and C2 decoupling capacitor should put near module.
For C1, the value depends on system noise, range 1uF~100uF is reasonable.
3. Damping resistors R1, R2, R3, R4 and R5 should be fine-tuned for system application.
4. L2 was added for RF Choke.
5. If you need more support and information on antenna implementation, please directly
contact us at [e-mail] for further services.
6. C4 was added for power noise reduction.
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