Operation Of Umts&Lte Module; Power On - Quectel UC20 User Manual

4
Operation of UMTS&LTE Module

4.1. Power On

1. Connect the UMTS&LTE module to the connector J101 on UMTS&LTE EVB, charge with the 5V
power adapter or USB cable and then pull S201 to ON state, then D103 will be light.
2. Press the S302 (PWRKEY) for at least 100ms. The module will be in the power-on mode and D101
(STATUS) will be light.
The follow tables show the module's working state which can be judged by D102 and D104.
Table 12: UMTS&LTE Module Indication of D102 and D104
Reference State
0.2s On/1.8s OFF
1.8s On/0.2s OFF
D102
NET_STATUS
0.125s On/0.125s OFF
Always ON
Always ON
D104
NET_MODE
Always OFF
NOTE
The indication of D102 and D104 varies in different modules. Please refer to related Hardware Design for
detailed information.
UMTS&LTE_EVB_User_Guide
Description
Network searching
Idle mode
Data transfer is ongoing with GSM/3G/4G network
Voice calling
Registered to 3G network (UC20)
Registered to 4G network (EC20)
Others
Confidential / Released
UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
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