Quectel LTE-A Series Hardware Design

EM121R-GL Hardware Design EM121R-GL Hardware Design 57 / 80 WCDMA B6 830–840 875–885 MHz WCDMA B8 880–915 925–960 MHz WCDAM B19 830–845 875–890 MHz LTE-FDD B1 1920–1980 2110–2170 MHz LTE-FDD B2 1850–1910 1930–1990 MHz LTE-FDD B3 1710–1785 1805–1880 MHz LTE-FDD B4 1710–1755 2110–2155 MHz LTE-FDD B5 824–849 869–894 MHz LTE-FDD B7 2500–2570 2620–2690 MHz LTE-FDD B8 880–915 925–960 MHz LTE-FDD B12 699–716 729–746 MHz LTE-FDD B13 777–787 746–756 MHz LTE-FDD B14 788–798 758� ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 17 / 80 1. 1) To meet this operating temperature range, you need to ensure effective thermal dissipation, for example, by adding passive or active heatsinks, heat pipes, vapor chambers, etc. Within this range, the module can meet 3GPP specifications. 2. 2) To meet this extended temperature range, you need to ensure effective thermal dissipation, for example, by adding passive or active heatsinks, heat pipes, vapor chambers, etc. Within this range, the module remains ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 43 / 80 4.3.3. PCIe Timing The following figure is PCIe power-on timing sequence for an adapter powered from system power rail in PCI Express M.2 specification. Figure 20: PCIe Power-on Timing Requirements of M.2 Specification The following table is power-on timing variables in PCI Express M.2 specification. Table 16: Power-up Timing of M.2 Specification 4.3.3.1. PCIe Turn-on Timing If FULL_CARD_POWER_OFF# is de-asserted, the module will turn on. RESET# is pulled up ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 63 / 80 5.2.2. Connector Definition Table 38: EM121R-GL Connector Definition of Antenna Interfaces 5.2.3. GNSS Frequency Table 39: GNSS Frequency Type Frequency Unit GPS L1/Galileo 1575.42 ±1.023 MHz GPS L5 1176.45 ±1.023 MHz GLONASS 1601.65 ±4.15 MHz BeiDou/COMPASS 1561.098 ±2.046 MHz Internal circuit for active antenna DC bias is shown as below. GNSS Antenna VDD_1.8V Module ANT_GNSS L1 R1 C1 0R NM NM C2 C3 C4 R2 Figure 32: Internal circuit for Active Antenna DC ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 64 / 80 5.2.4. GNSS Performance Table 40: EM121R-GL GNSS Performance Parameter Description Conditions Typ. Unit Sensitivity (GNSS) Cold start Autonomous -148 dBm Reacquisition Autonomous -160 dBm Tracking Autonomous -159 dBm TTFF (GNSS) Cold start @ open sky Autonomous 27.46 s XTRA enabled 17.07 s Warm start @ open sky Autonomous 26.45 s XTRA enabled 1.53 s Hot start @ open sky Autonomous 1.02 s XTRA enabled 1.03 s Accuracy (GNSS) CEP-50 Autonomous @ open sky 2.08 m ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 75 / 80 7 Mechanical Dimensions and Packaging This chapter mainly describes mechanical dimensions and packaging specifications of EM121R-GL. All dimensions are measured in mm, and the tolerances are ±0.2 mm unless otherwise specified. 7.1. Mechanical Dimensions of the Module Figure 40: Mechanical Dimensions of the Module (Unit: mm) ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 49 / 80 The clock and mode can be configured by AT command, and the default configuration is master mode using short frame synchronization format with 2048 kHz PCM_CLK and 8 kHz PCM_SYNC. See document [3] for details about AT+QDAI command. 4.5. Control and Indication Interfaces Table 21: Pin Definition of Control and Indication Interfaces 4.5.1. W_DISABLE1# The module provides a W_DISABLE1# pin to disable or enable airplane mode through hardware operation. W_DISABLE1 ...

EM121R-GL Hardware Design EM121R-GL Hardware Design 70 / 80 6 Electrical Characteristics and Reliability 6.1. Power Supply Requirements The typical input voltage of the module is 3.7 V. The following table shows the power supply requirements of the module. Table 43: Power Supply Requirements 6.2. Current Consumption 6.2.1. PCIe Only Version Table 44: EM121R-GL Current Consumption (PCIe Only Version, 3.3 V Power Supply) Description Conditions Typ. Unit OFF state Power down 66 μA Parameter Description Min. Typ. Max. Un ...