Service Guide
Table Of Contents
- Safety Information
- About the Document
- Contents
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Overview
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Operating Modes
- 3.5. Power Saving
- 3.6. Power Supply
- 3.7. Turn on/Turn off/Reset
- 3.8. (U)SIM Interfaces
- 3.9. USB Interface
- 3.10. UART Interfaces
- 3.11. SPI Interface
- 3.12. I2C Interfaces
- 3.13. PCM Interface
- 3.14. Analog Audio Interfaces
- 3.15. LCD Interface
- 3.16. Matrix Keyboard Interface
- 3.17. SD Card Interface
- 3.18. WLAN Application Interface*
- 3.19. ADC Interfaces
- 3.20. Network Status Indication
- 3.21. STATUS
- 3.22. Behaviors of MAIN_RI
- 3.23. USB_BOOT Interface
- 4 Antenna Interfaces
- 5 Electrical Characteristics, Radio and Reliability
- 6 Mechanical Information
- 7 Storage, Manufacturing & Packaging
- 8 Appendix References
LTE Standard Module Series
EC200U_Series_Hardware_Design 62 / 94
Table 38: GNSS Frequency
A reference design of GNSS antenna is shown as below:
GNSS
Antenna
VDD
Module
ANT_GNSS
47 nH
10R
0.1 uF
0R
NM NM
100 pF
Figure 30: Reference Circuit of GNSS Antenna
ANT_GNSS
47
AI
GNSS antenna interface
50 Ω impedance.
If unused, keep it open.
Type
Frequency
Unit
GPS
1575.42 ±1.023
MHz
GLONASS
1597.5–1605.8
MHz
Galileo
1575.42 ±2.046
MHz
BeiDou (Compass)
1561.098 ±2.046
MHz
QZSS
1575.42
MHz
1. An external LDO can be selected to supply power according to the active antenna requirement.
2. The VDD circuit is not needed if you select a passive antenna.
NOTE