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FC21 Hardware Design

Wi-Fi&BT Module Series

Version: 1.0

Date: 2020-08-13

Status: Preliminary

www.quectel.com

Summary of content (55 pages)

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FC21 Hardware Design Wi-Fi&BT Module Series Version: 1.0 Date: 2020-08-13 Status: Preliminary www.quectel.
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Wi-Fi&BT Module Series FC21 Hardware Design Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District, Shanghai 200233, China Tel: +86 21 5108 6236 Email: info@quectel.com Or our local office. For more information, please visit: http://www.quectel.com/support/sales.htm.
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Wi-Fi&BT Module Series FC21 Hardware Design About the Document Revision History Version Date Author Description 1.
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Wi-Fi&BT Module Series FC21 Hardware Design Contents About the Document ..............................................................................................................................2 Contents .................................................................................................................................................3 Table Index .............................................................................................................................................
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Wi-Fi&BT Module Series FC21 Hardware Design 4 Electrical, Reliability and Radio Characteristics ......................................................................... 34 4.1. General Description .............................................................................................................. 34 4.2. Electrical Characteristics ....................................................................................................... 34 4.3. I/O Interface Characteristics.........................
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Wi-Fi&BT Module Series FC21 Hardware Design Table Index Table 1: FC21 Module ............................................................................................................................. 7 Table 2: Key Features ............................................................................................................................. 9 Table 3: I/O Parameters Definition .........................................................................................................
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Wi-Fi&BT Module Series FC21 Hardware Design Figure Index Figure 1: Functional Diagram of FC21 Module....................................................................................... 11 Figure 2: Pin Assignment of FC21 Module ............................................................................................. 14 Figure 3: Reference Circuit for VDD_3V3 ..............................................................................................
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Wi-Fi&BT Module Series FC21 Hardware Design 1 Introduction This document defines the FC21 module and describes its air interface and hardware interfaces which are connected to the customers’ applications. The document can help customers quickly understand module interface specifications, electrical and mechanical details, as well as other related information of the module.
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Wi-Fi&BT Module Series FC21 Hardware Design 1.1. Safety Information The following safety precautions must be observed during all phases of operation, such as usage, service or repair of any cellular terminal or mobile incorporating FC21 module. Manufacturers of the cellular terminal should notify users and operating personnel of the following safety information by incorporating these guidelines into all manuals of the product.
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Wi-Fi&BT Module Series FC21 Hardware Design 2 Product Concept 2.1 General Description FC21 is a low-power cost-effective Wi-Fi/BT module based on QCA1023. FC21 supports 1×1 IEEE 802.11a/b/g/n/ac WLAN standards and BT 4.2 (BLE and SPP) and provides a low-power SDIO 3.0 interface for Wi-Fi and UART&PCM interfaces for BT*, and also supports LTE/WLAN coexistence. FC21 module is a SMT module, with 38 LCC pins and 14 LGA pins. The module package is compact and the size is only 16.6mm × 13mm × 2.1mm.
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Wi-Fi&BT Module Series FC21 Hardware Design     802.11n (20MHz): 7.2Mbps, 14.2Mbps, 21.7Mbps, 28.9Mbps, 43.3Mbps, 57.8Mbps, 65Mbps, 72.2Mbps 802.11n (40MHz): 15Mbps, 30Mbps, 45Mbps, 60Mbps, 90Mbps, 120Mbps, 150Mbps 802.11a: 6Mbps, 9Mbps, 12Mbps, 18Mbps, 24Mbps, 36Mbps, 48Mbps, 54Mbps 802.11ac: VHT20 (MCS0~MCS8), VHT40 (MCS0~MCS9), VHT80 (MCS0~MCS9) Wi-Fi Transmitting Power  TBD Wi-Fi Protocol Features  IEEE 802.
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Wi-Fi&BT Module Series FC21 Hardware Design 2.3 Functional Diagram The following figure shows a block diagram of FC21 module and illustrates the major functional parts:     Power supply Wireless Connectivity Interfaces - Wi-Fi interface - BT interface - Coexistence interface Antenna interface Other interfaces - DBG_TXD - 32KHz_IN interface 批注 [RL5]: FC21_SA 版本带 2.4G Filter， FC21_SD 版本不带 2.4G Filter. Figure 1: Functional Diagram of FC21 Module 要不要加这个备注 NOTE 批注 [RL6R5]: FC21_SA version has 2.
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Wi-Fi&BT Module Series FC21 Hardware Design 2.4 Evaluation Board In order to help customers to develop applications with FC21 module, Quectel supplies an evaluation board (UMTS<E EVB), an RS-232 to USB converter cable, a USB data cable, a power adapter, 4 antennas and other peripherals to control or test the module. For details, please refer to document [1].
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Wi-Fi&BT Module Series FC21 Hardware Design 3 Application Interfaces 3.1. General Description FC21 module is equipped with 38 LCC pads and 14 LGA pads that can be connected to cellular application platform.
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Wi-Fi&BT Module Series FC21 Hardware Design GND RESERVED RESERVED RESERVED WAKE_ON_WIRELESS 35 34 33 32 RESERVED 37 GND 1 31 30 RF_ANT 29 GND 28 GND RESERVED 2 RESERVED 3 DBG_TXD 4 LTE_UART_TXD 5 LTE_UART_RXD BT_UART_RTS BT_UART_CTS BT_EN 52 50 51 39 49 6 40 48 1) 7 41 47 1) 8 WLAN_EN 1) 9 42 46 1) 10 43 44 45 GND 27 SDIO_CMD 26 SDIO_CLK 25 SDIO_D0 24 SDIO_D1 23 SDIO_D2 22 SDIO_D3 WLAN BT ) 32KHz_IN 2 1) BT_UART_RXD 1) BT_UART_TXD 1)
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Wi-Fi&BT Module Series FC21 Hardware Design 3.3. Pin Description The following tables show the pin definition of FC21 module. Table 3: I/O Parameters Definition Type Description DI Digital input DO Digital output IO Bidirectional PI Power input Table 4: Pin Description of FC21 Module Power Supply Pin Name Pin No. I/O Description DC Characteristics Comment VDD_3V3 21 PI Main power supply for module Vmax=3.46V Vmin=3.14V Vnorm=3.3V It must be provided with sufficient current up to 0.6A.
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Wi-Fi&BT Module Series FC21 Hardware Design pin open. WLAN_EN SDIO_D3 SDIO_D2 1) SDIO_D1 SDIO_D0 SDIO_CLK SDIO_CMD 9 22 23 24 25 26 DI IO IO IO IO DI Wi-Fi function control VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain. Active high. SDIO data bus D3 VOLmax=0.18V VOHmin=1.62V VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain SDIO data bus D2 VOLmax=0.18V VOHmin=1.62V VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain.
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Wi-Fi&BT Module Series FC21 Hardware Design BT_EN BT_WAKE_ HOST PCM_IN PCM_SYNC 10 46 13 14 VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain. Active high. If unused, keep this pin open. BT wake up the host VOLmax=0.18V VOHmin=1.62V 1.8V power domain. Active low. Pulled up internally. If unused, keep this pin open. DI BT PCM data input VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain. If unused, keep this pin open.
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Wi-Fi&BT Module Series FC21 Hardware Design pin open. LTE_UART_ RXD 6 DI LTE/Wi-Fi&BT coexistence signal Pin Name Pin No. I/O Description RF_ANT 30 IO Wi-Fi/BT antenna interface I/O Description VILmin=-0.3V VILmax=0.54V VIHmin=1.26V VIHmax=2.0V 1.8V power domain. If unused, keep this pin open. DC Characteristics Comment RF Interface 50Ω impedance. Other Interfaces Pin Name DBG_TXD 32KHz_IN 2) Pin No. 4 19 DC Characteristics Comment OD Used for software debugging VOLmax=0.
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Wi-Fi&BT Module Series FC21 Hardware Design 批注 [RL7]: 中文下面有个单独的 3.4.1 引脚介绍，是否要加上 3.4. Power Supply 3.4.1. Pin Introduction The following table shows the power supply pins and the ground pins of FC21. The VIO power supply is recommended to be powered by VDD_EXT of EC2x&EG2x-G modules. Table 5: Power Supply Pins and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VDD_3V3 21 Main power supply for the module 3.14 3.3 3.46 V VIO 11 Power supply for the module’s I/O pins 1.71 1.
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Wi-Fi&BT Module Series FC21 Hardware Design The following figure shows the recommended power on/off sequences for FC21 module. ≥0 VIO >0 >0 PM_ENABL E VDD_3V3 ≥ 10 µs ≥ 5 µs WLAN_EN Module Status Power up Runnin g Power down Figure 4: Timing of Turning on/off FC21 Module 3.5. Wireless Connectivity Interfaces FC21 support a low-power SDIO 3.0 interface for WLAN, and UART&PCM interfaces for BT function. 3.5.1.
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Wi-Fi&BT Module Series FC21 Hardware Design 3.5.1.1. WAKE_ON_WIRELESS WAKE_ON_WIRELESS is used to wake up the EC2x&EG2x-G module. When the pin is pulled down, EC2x&EG2x-G can be woken up. Table 6: Pin Definition of WAKE_ON_WIRELESS Pin Name Pin No. WAKE_ON_WIRELESS 32 I/O OD Description Comment Wi-Fi wake up the host 1.8V power domain. Active low. Require external pull-up to 1.8V. If unused, keep this pin open. 3.5.1.2. WAKE_EN WLAN_EN is used to control the WLAN function of FC21.
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Wi-Fi&BT Module Series FC21 Hardware Design 3.5.1.3. SDIO Interface The following table shows the pin definition of SDIO interface. Table 8: Pin Definition of SDIO Interface Pin Name Pin No. I/O Description Comment SDIO_D3 22 IO SDIO data bus D3 1.8V power domain. SDIO_D2 23 IO SDIO data bus D2 1.8V power domain. Require external pull-up to 1.8V. SDIO_D1 24 IO SDIO data bus D1 1.8V power domain. SDIO_D0 25 IO SDIO data bus D0 1.8V power domain. SDIO_CLK 26 DI SDIO bus clock 1.
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Wi-Fi&BT Module Series FC21 Hardware Design     Do not route SDIO signal traces under crystals, oscillators, magnetic devices and RF signal traces. SDIO_D2 is a boot strap signal, which must be kept at high level for normal operation during power on. The pull-up resistor on SDIO_D2 line must be mounted. Keep SDIO traces as short as possible with equal length, and impedance control as 50Ω. The spacing to all other signals is greater than 2 times of the trace width. 批注 [RL8]: 中文这里没有加星号，中文是否要加上 3.5.2.
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Wi-Fi&BT Module Series FC21 Hardware Design 3.5.2.2. BT_WAKE_HOST BT_WAKE_HOST is used to wake up the EC2x&EG2x-G module. When the pin is pulled down, EC2x&EG2x-G can be woken up. Table 10: Pin Definition of BT_WAKE_HOST Pin Name Pin No. BT_WAKE_HOST 46 I/O OD Description Comment BT wake up the host 1.8V power domain. Active Low. Pulled up internally. If unused, keep this pin open. 3.5.2.3. PCM Interface FC21 provides a PCM interface for BT application.
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Wi-Fi&BT Module Series FC21 Hardware Design Figure 8: Reference Design for PCM Interface 3.5.2.4. BT_UART Interface 批注 [RL9]: 中文是 BT_UART，这里是否需要改为一致 FC21 provides a dedicated UART interface for BT application. The following table shows the pin definition of UART interface. 批注 [RL10R9]: Table 12: Pin Definition of UART Interface Pin Name Pin No.
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Wi-Fi&BT Module Series FC21 Hardware Design 3.5.3. Coexistence Interface The following table shows the pin definition of coexistence interface 1). Table 13: Pin Definition of Coexistence Interface Pin Name LTE_UART_TXD LTE_UART_RXD Pin No. 5 6 I/O Description DO LTE/Wi-Fi&BT coexistence signal DI LTE/Wi-Fi&BT coexistence signal Comment 1.8V power domain. If unused, keep these pins open. The following figure shows the coexistence interface connection between FC21 and EC2x&EG2x-G.
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Wi-Fi&BT Module Series FC21 Hardware Design 3.6. Other Interfaces 3.6.1. DBG_TXD Interface DBG_TXD interface can be used for log output. Table 14: Pin Definition of DBG_TXD Interface Pin Name Pin No. I/O Description Comment DBG_TXD 4 OD Used for software debugging 1.8V power domain. Require external pull-up to 1.8V. If unused, keep this pin open. 3.6.2. 32KHz_IN Interface The 32KHz clock is used in low power mode such as IEEE power saving mode and sleep mode.
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Wi-Fi&BT Module Series FC21 Hardware Design 批注 [RL12]: 中文里有这个射频天线 Layout 参考指导章节，是否需要添加 3.7. Antenna Interface Pin 30 is the RF antenna pad. And the RF port has an impedance of 50Ω. 3.7.1. Pin Definition of RF Antenna Interface Table 16: Pin Definition of RF Antenna Interface Pin Name Pin No. I/O Description GND 28 Ground GND 29 Ground RF_ANT 30 GND 31 Comment 批注 [RL13R12]: IO Wi-Fi/BT antenna pad 50Ω impedance Ground 3.7.2. Operating Frequency Operating frequency is as bellow.
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Wi-Fi&BT Module Series FC21 Hardware Design FC21 R1 RF_ANT 0R C1 NM C2 NM Figure 11: Reference Circuit for RF Antenna Interface Another type of reference circuit for the RF antenna interface is shown below. It is designed for vehicle applications. It is recommended to reserve two notch filter circuits and a π-type matching circuit for better RF performance. C2/L1 and L3/C3 comprise two notch filter circuits for filtering out interference caused by a particular frequency.
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Wi-Fi&BT Module Series FC21 Hardware Design Figure 13: Microstrip Design on a 2-layer PCB Figure 14: Coplanar Waveguide Design on a 2-layer PCB Figure 15: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground) FC21_Hardware_Design 30 / 52
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Wi-Fi&BT Module Series FC21 Hardware Design Figure 16: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground) In order to ensure RF performance and reliability, the following principles should be complied with in RF layout design:       Use an impedance simulation tool to accurately control the characteristic impedance of RF traces to 50 Ω. The GND pins adjacent to RF pins should not be designed as thermal relief pads, and should be fully connected to ground.
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Wi-Fi&BT Module Series FC21 Hardware Design Table 19: Antenna Requirements Type Requirements Frequency Range 2.412GHz~2.472GHz 5.180GHz~5.825GHz VSWR < 2:1 recommended Gain (dBi) Typically 1 Max Input Power (W) 50 Input Impedance (Ω) 50 Polarization Type Vertical 3.7.6. Recommended RF Connector for Antenna Installation If RF connector is used for antenna connection, it is recommended to use the U.FL-R-SMT connector provided by Hirose. Figure 17: Dimensions of the U.
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Wi-Fi&BT Module Series FC21 Hardware Design Figure 18: Mechanicals of U.FL-LP Connectors The following figure describes the space factor of mated connector. Figure 19: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com.
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Wi-Fi&BT Module Series FC21 Hardware Design 4 Electrical, Reliability and Radio Characteristics 4.1. General Description This chapter mainly introduces the electrical and the radio frequency characteristics of FC21 module, which are listed in detail in the following chapters:      Electrical characteristics I/O interface characteristics Current consumption RF performance Electrostatic discharge 4.2. Electrical Characteristics The following table shows the absolute maximum ratings.
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Wi-Fi&BT Module Series FC21 Hardware Design Table 21: Recommended Operating Conditions Parameter Min. Typ. Max. Unit VDD_3V3 3.14 3.3 3.46 V VIO 1.71 1.8 3.46 V 4.3. I/O Interface Characteristics The following table shows the general DC electrical characteristics over recommended operating conditions (unless otherwise specified). Table 22: General DC Electrical Characteristics Symbol Parameter Min. Max. Unit VIH High Level Input Voltage 0.7 x VIO VIO+0.
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Wi-Fi&BT Module Series FC21 Hardware Design TX 11 Mbps TBD TBD mA RX 1 Mbps TBD TBD mA RX 11 Mbps TBD TBD mA TX 6 Mbps TBD TBD mA TX 54 Mbps TBD TBD mA RX 6 Mbps TBD TBD mA RX 54 Mbps TBD TBD mA TX HT20-MCS0 TBD TBD mA TX HT20-MCS7 TBD TBD mA TX HT40-MCS0 TBD TBD mA TX HT40-MCS7 TBD TBD mA RX HT20-MCS0 TBD TBD mA RX HT20-MCS7 TBD TBD mA RX HT40-MCS0 TBD TBD mA RX HT40-MCS7 TBD TBD mA TX HT20 MCS0 TBD TBD mA TX HT20 MCS7 TBD TBD mA RX HT20
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Wi-Fi&BT Module Series FC21 Hardware Design RX VHT20 MCS0 TBD TBD mA RX VHT20 MCS8 TBD TBD mA RX VHT40 MCS0 TBD TBD mA RX VHT40 MCS9 TBD TBD mA RX VHT80 MCS8 TBD TBD mA RX VHT80 MCS9 TBD TBD mA NOTES 1. 1) OFF state: Executing AT+QWIFI=0 command will make the module enter this state. Under the state, the sleep clock is disabled and no data is saved. 2. 2) Idle state: Wi-Fi function enabled via AT+QWIFI=1, but without any device connected to the AP. 4.4.2.
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Wi-Fi&BT Module Series FC21 Hardware Design 802.11g 6Mbps TBD dBm 802.11g 54Mbps TBD dBm 802.11n, HT20 MCS0 TBD dBm 802.11n, HT20 MCS7 TBD dBm 802.11n, HT40 MCS0 TBD dBm 802.11n, HT40 MCS7 TBD dBm Table 26: Conducted RF Output Power at 5GHz Standard Data Rate Typ. Unit 802.11a 6 Mbps TBD dBm 802.11a 54 Mbps TBD dBm 802.11n，HT20 MCS0 TBD dBm 802.11n，HT20 MCS7 TBD dBm 802.11n，HT40 MCS0 TBD dBm 802.11n，HT40 MCS7 TBD dBm 802.11ac，VHT20 MCS0 TBD dBm 802.
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Wi-Fi&BT Module Series FC21 Hardware Design 802.11g 6Mbps TBD dBm 802.11g 54Mbps TBD dBm 802.11n, HT20 MCS0 TBD dBm 802.11n, HT20 MCS7 TBD dBm 802.11n, HT40 MCS0 TBD dBm 802.11n, HT40 MCS7 TBD dBm Table 28: Conducted RF Receiving Sensitivity at 5GHz Standard Data Rate Typ. Unit 802.11a 6 Mbps TBD dBm 802.11a 54 Mbps TBD dBm 802.11n，HT20 MCS0 TBD dBm 802.11n，HT20 MCS7 TBD dBm 802.11n，HT40 MCS0 TBD dBm 802.11n，HT40 MCS7 TBD dBm 802.
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Wi-Fi&BT Module Series FC21 Hardware Design 19 TBD TBD 39 TBD TBD 4.6. Electrostatic Discharge The module is not protected against Electrostatic Discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be followed throughout the processing, handling and operation of any application that involves the module.
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Wi-Fi&BT Module Series FC21 Hardware Design 5 Mechanical Dimensions This chapter describes the mechanical dimensions of FC21 module. All dimensions are measured in millimeter (mm), and the dimensional tolerances are ±0.05mm unless otherwise specified. 5.1.
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Wi-Fi&BT Module Series FC21 Hardware Design Figure 21: Bottom Dimensions NOTE The package warpage level of the module conforms to JEITA ED-7306 standard.
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Wi-Fi&BT Module Series FC21 Hardware Design 批注 [RL15]: 中文分开的两章结，是否需要分开 5.2.
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Wi-Fi&BT Module Series FC21 Hardware Design The recommended stencil design for FC21 is shown below. To ensure the module soldering quality, the thickness of stencil for the module is recommended to be 0.18mm. Figure 23: Recommended Stencil Design NOTE For easy maintenance of the module, please keep about 3mm between the module and other components on host PCB.
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Wi-Fi&BT Module Series FC21 Hardware Design 5.3. Top and Bottom Views of the Module Figure 24: Top View of the Module Figure 25: Bottom View of the Module NOTE These are renderings of FC21 modules. For authentic appearance, please refer to the module provided by Quectel.
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Wi-Fi&BT Module Series FC21 Hardware Design 6 Storage, Manufacturing and Packaging 6.1. Storage The module is provided with vacuum-sealed packaging. MSL of the module is rated as 3. The storage requirements are shown below. 1. Recommended Storage Condition: The temperature should be 23 ±5 °C and the relative humidity should be 35%–60%. 2. The storage life (in vacuum-sealed packaging) is 12 months in Recommended Storage Condition. 3.
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Wi-Fi&BT Module Series FC21 Hardware Design NOTES 1. 1) This floor life is only applicable when the environment conforms to IPC/JEDEC J-STD-033. 2. To avoid blistering, layer separation and other soldering issues, it is forbidden to expose the modules to the air for a long time. If the temperature and moisture do not conform to IPC/JEDEC J-STD-033 or the relative moisture is over 60%, It is recommended to start the solder reflow process within 24 hours after the package is removed.
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Wi-Fi&BT Module Series FC21 Hardware Design Table 31: Recommended Thermal Profile Parameters Factor Recommendation Soak Zone Max slope 1–3 °C/s Soak time (between A and B: 150 °C and 200 °C) 70–120 s Reflow Zone Max slope 2–3 °C/s Reflow time (D: over 220°C) 45–70 s Max temperature 238 °C to 246 °C Cooling down slope -1.
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Wi-Fi&BT Module Series FC21 Hardware Design 6.3. Packaging FC21 module is packaged in a vacuum-sealed bag which is ESD protected. The bag should not be opened until the devices are ready to be soldered onto the application.
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Wi-Fi&BT Module Series FC21 Hardware Design 7 Appendix A References Table 32: Related Documents SN Document Name Remark [1] Quectel_UMTS<E_EVB_User_Guide UMTS<E EVB user guide [2] Quectel_EC25_Reference_Design EC25 reference design [3] Quectel_EC21_Reference_Design EC21 reference design [4] Quectel_EC20_R2.1_Reference_Design EC20 R2.
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Wi-Fi&BT Module Series FC21 Hardware Design I/O Input/Output IEEE Institute of Electrical and Electronics Engineers IIL Input Leakage Current LTE Long Term Evolution Mbps Million Bits Per Second MCS Modulation and Coding Scheme MOQ Minimum Order Quantity MP Manufacture Product PCB Printed Circuit Board QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RH Relative Humidity RoHS Restriction of Hazardous Substances RX Receive Direction SDIO
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Wi-Fi&BT Module Series FC21 Hardware Design VIO Voltage for Input/Output Port VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WLAN Wireless Local Area Network Hereby, [Quectel Wireless Solutions Co., Ltd.] declares that the radio equipment type [FC21] is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.quectel.com.
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Wi-Fi&BT Module Series FC21 Hardware Design Wi-Fi 5G U-NII-3 802.11ac HT20 5.05 802.11ac HT40 5.05 802.11ac HT80 5.05 802.11a 4.54 802.11n HT20 4.54 802.11n HT40 4.54 802.11ac HT20 4.54 802.11ac HT40 4.54 802.11ac HT80 Bluetooth 4.54 3.00 The use for 5GHz WLAN band is restricted to indoor use. This restriction will be applied to all Member States of European Union listed in the label. FCC Certification Requirements.
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Wi-Fi&BT Module Series FC21 Hardware Design affixed label, the module must be labeled with an FCC ID - Section 2.926 (see 2.2 Certification (labeling requirements) above). The OEM manual must provide clear instructions explaining to the OEM the labeling requirements, options and OEM user manual instructions that are required (see next paragraph).