Silicon Labs BRD4104A : EFR32BG13 2.4 GHz 10 dBm Radio Board Reference Manual

Silicon Labs BRD4104A : EFR32BG13 2.4 GHz 10 dBm Radio Board Reference Manual

EFR32BG13 2.4 GHz 10 dBm Radio Board BRD4104A Reference Manual

The BRD4104A Blue Gecko Radio Board enables developers to develop Bluetooth and UFL connector.

® low energy and proprietary wireless wireless applications. The board contains a 2.4 GHz Blue Gecko Wireless System on Chip and it optimized for operating at 10 dBm output power. Radiated and conducted testing is supported with the on-board printed antenna The BRD4104A Blue Gecko Radio Board plugs into the Wireless Starter Kit Mainboard, which is provided with the Blue Gecko Starter Kit and gives access to display, buttons and additional features from Expansion Boards. With the supporting Simplicity Studio suite of tools, developers can take advantage of graphical wireless application develop ment; BGScript for Python-like scripting; and visual energy profiling and optimization.

The board also serves as an RF reference design for applications targeting 2.4 GHz wireless operation with 10 dBm output power.

This document contains brief introduction and description of the BRD4104A Radio Board features focusing on the RF sections and performance.

RADIO BOARD FEATURES

• Wireless SoC: EFR32BG13P632F512GM48 • CPU core: ARM Cortex ® -M4 with FPU • Flash memory: 512 kB • RAM: 64 kB • Operation frequency: 2.4 GHz • Transmit power: 10 dBm • Integrated PCB antenna, UFL connector (optional).

• Crystals for LFXO and HFXO: 32.768 kHz and 38.4 MHz.

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Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2. Radio Board Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 Radio Board Connector Pin Associations. . . . . . . . . . . . . . . . . . . . . 2

3. Radio Board Block Summary . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 Radio Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3 Radio Board Block Description . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3.1 Wireless MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3.2 LF Crystal Oscillator (LFXO) . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3.3 HF Crystal Oscillator (HFXO) . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3.4 Matching Network for 2.4 GHz. . . . . . . . . . . . . . . . . . . . . . . . 3

3.3.5 UFL Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3.6 Radio Board Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3.7 Inverted-F Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3.8 Serial Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3.9 Serial EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4. RF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.2 Schematic of the RF Matching Network . . . . . . . . . . . . . . . . . . . . . 5 4.2.1 Description of the 2.4 GHz RF Matching . . . . . . . . . . . . . . . . . . . . 5 4.3 RF Section Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.4 Bill of Materials for the 2.4 GHz Matching . . . . . . . . . . . . . . . . . . . . 5

4.5 Inverted-F Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5. Mechanical Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6. EMC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6.2 EMC Regulations for 2.4 GHz . . . . . . . . . . . . . . . . . . . . . . . . 8 6.2.1 ETSI EN 300-328 Emission Limits for the 2400-2483.5 MHz Band . . . . . . . . . . . 8 6.2.2 FCC15.247 Emission Limits for the 2400-2483.5 MHz Band. . . . . . . . . . . . . . 8 6.2.3 Applied Emission Limits for the 2.4 GHz Band . . . . . . . . . . . . . . . . . . 8

7. RF Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.1 Conducted Power Measurements . . . . . . . . . . . . . . . . . . . . . . . 9 7.1.1 Conducted Measurements in the 2.4 GHz band . . . . . . . . . . . . . . . . . . 9

7.2 Radiated Power Measurements . . . . . . . . . . . . . . . . . . . . . . . .10

7.2.1 Radiated Measurements in the 2.4 GHz band . . . . . . . . . . . . . . . . . .10

8. EMC Compliance Recommendations . . . . . . . . . . . . . . . . . . . . . .11

8.1 Recommendations for 2.4 GHz ETSI EN 300-328 compliance . . . . . . . . . . . . .11

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8.2 Recommendations for 2.4 GHz FCC 15.247 compliance . . . . . . . . . . . . . . .11

9. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . .

12

10. Board Revision History . . . . . . . . . . . . . . . . . . . . . . . . . .

11. Errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

14

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BRD4104A Reference Manual Introduction

1. Introduction

The EFR32 Blue Gecko Radio Boards provide a development platform (together with the Wireless Starter Kit Mainboard) for the Silicon Labs EFR32 Blue Gecko Wireless System on Chips and serve as reference designs for the matching network of the RF interface.

The BRD4104A Radio Board is designed to operate in the 2400-2483.5 MHz band with the RF matching network optimized for operat ing at 10 dBm output power.

To develop and/or evaluate the EFR32 Blue Gecko, the BRD4104A Radio Board can be connected to the Wireless Starter Kit Main board to get access to display, buttons and additional features from Expansion Boards and also to evaluate the performance of the RF interface.

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BRD4104A Reference Manual Radio Board Connector

2. Radio Board Connector 2.1 Introduction

The board-to-board connector scheme allows access to all EFR32BG13 GPIO pins as well as the RESETn signal. For more information on the functions of the available pins, see the EFR32BG13 data sheet.

2.2 Radio Board Connector Pin Associations

The figure below shows the mapping between the connector and the EFR32BG13 pins and their function on the Wireless Starter Kit Mainboard.

3v3 UIF_BUTTON1 / PF7 / P36 NC / P38 NC / P40 NC / P42 NC / P44 DEBUG.TMS_SWDIO / PF1 / F0 DEBUG.TDO_SWO / PF2 / F2 DEBUG.RESET / RADIO_#RESET / F4 VCOM.TX_MOSI / PA0 / F6 VCOM.#CTS_SCLK / PA2 / F8 UIF1_LED0 / PF4 / F10 UIF_BUTTON0 / PF6 / F12 DISP_ENABLE / PD15 / F14 DISP_SI / PC6 / F16 DISP_EXTCOMIN / PD13 / F18 PTI.DATA / PB12 / F20 USB_VBUS 5V Board ID SCL

P200 Upper Row

GND P37 / PD15 / SENSOR_ENABLE P39 / NC P41 / NC P43 / NC P45 / NC F1 / PF0 / DEBUG.TCK_SWCLK

F3 / PF3 / DEBUG.TDI

F5 / PA5 / VCOM_ENABLE F7 / PA1 / VCOM.RX_MISO

F9 / PA3 / VCOM.#RTS_#CS F11 / PF5 / UIF_LED1 F13 / PF7 / UIF_BUTTON1 F15 / PC8 / DISP_SCLK F17 / PD14 / DISP_SCS F19 / PB13 / PTI.SYNC

F21 / PB11 / PTI.CLK

USB_VREG GND Board ID SDA GND VCOM.#CTS_SCLK / PA2 / P0 VCOM.#RTS_#CS / PA3 / P2 PD10 / P4 PD11 / P6 PD12 / P8 DEBUG.TDI / PF3 / P10 PC10 / P12 PA4 / P14 VCOM_ENABLE / PA5 / P16 PTI.CLK / PB11 / P18 PTI.DATA / PB12 / P20 PTI.SYNC / PB13 / P22 DEBUG.TCK_SWCLK / PF0 / P24 DEBUG.TMS_SWDIO / PF1 / P26 DEBUG.TDO_SWO / PF2 / P28 UIF_LED0 / PF4 / P30 UIF_LED1 / PF5 / P32 UIF_BUTTON0 / PF6 / P34 GND

P201 Lower Row

VMCU_IN P1 / PC6 / DISP_SI P3 / PC7 P5 / PC8 / DISP_SCLK P7 / PC9 P9 / PA0 / VCOM.TX_MOSI

P11 / PA1 / VCOM.RX_MISO

P13 / PC11 P15 / NC P17 / NC P19 / NC P21 / NC P23 / NC P25 / NC P27 / NC P29 / NC P31 / PD13 / DISP_EXTCOMIN P33 / PD14 / DISP_SCS P35 / PD15 / DISP_ENABLE VRF_IN Figure 2.1. BRD4104A Radio Board Connector Pin Mapping silabs.com

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BRD4104A Reference Manual Radio Board Block Summary

3. Radio Board Block Summary 3.1 Introduction

This section gives a short introduction to the blocks of the BRD4104A Radio Board.

3.2 Radio Board Block Diagram

The block diagram of the BRD4104A Radio Board is shown in the figure below.

Radio Board Connectors I2C GPIO UART Debug AEM Packet Trace SPI EFR32

Wireless SoC

UFL Connector 2.4 GHz RF Matching Network & Path Selection 2.4 GHz RF Inverted-F PCB Antenna 24AA024 Serial EEPROM 8 Mbit MX25R Serial Flash 32.768k

LF Crystal 38.4M

HF Crystal

Figure 3.1. BRD4104A Block Diagram 3.3 Radio Board Block Description 3.3.1 Wireless MCU

The BRD4104A Blue Gecko Radio Board incorporates an EFR32BG13P632F512GM48 Wireless System on Chip featuring 32-bit Cor tex ® -M4 with FPU core, 512 kB of flash memory, 64 kB of RAM and a 2.4 GHz band transceiver with output power up to 10 dBm. For additional information on the EFR32BG13P632F512GM48, refer to the EFR32BG13 Data Sheet.

3.3.2 LF Crystal Oscillator (LFXO)

The BRD4104A Radio Board has a 32.768 kHz crystal mounted. For details regarding the crystal configuration, refer to Application Note AN0016: Oscillator Design Considerations.

3.3.3 HF Crystal Oscillator (HFXO)

The BRD4104A Radio Board has a 38.4 MHz crystal mounted. For details regarding the crystal configuration, refer to Application Note AN0016: Oscillator Design Considerations.

3.3.4 Matching Network for 2.4 GHz

The BRD4104A Radio Board incorporates a 2.4 GHz matching network which connects the 2.4 GHz RF input/output of the EFR32BG13 to the one on-board printed Inverted-F antenna. The component values were optimized for the 2.4 GHz band RF perform ace and current consumption with 10 dBm output power.

For detailed description of the matching network, see Chapter 4.2.1 Description of the 2.4 GHz RF Matching .

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BRD4104A Reference Manual Radio Board Block Summary

3.3.5 UFL Connector

To be able to perform conducted measurements Silicon Labs added an UFL connector to the Radio Board. The connector allows an external 50 Ohm cable or antenna to be connected during design verification or testing.

Note:

By default the output of the matching network is connected to the printed Inverted-F antenna by a series component. It can be connected to the UFL connector as well through a series 0 Ohm resistor which is not mounted by default. For conducted measurements through the UFL connector the series component to the antenna should be removed and the 0 Ohm resistor should be mounted (see Chapter

4.2 Schematic of the RF Matching Network

for further details).

3.3.6 Radio Board Connectors

Two dual-row, 0.05” pitch polarized connectors make up the BRD4104A Radio Board interface to the Wireless Starter Kit Mainboard.

For more information on the pin mapping between the EFR32BG13P632F512GM48 and the Radio Board Connector, refer to Chapter

2.2 Radio Board Connector Pin Associations

.

3.3.7 Inverted-F Antenna

The BRD4104A Radio Board includes a printed inverted-F antenna (IFA) tuned to have close to 50 Ohm impedance at the 2.4 GHz band.

For detailed description of the antenna see Chapter 4.5 Inverted-F Antenna .

3.3.8 Serial Flash

The BRD4104A Radio Board is equipped with an 8 Mbit Macronix MX25R SPI flash that is connected directly to the EFR32BG13. For additional information on the pin mapping see the schematic of the BRD4104A.

3.3.9 Serial EEPROM

The BRD4104A Radio Board is equipped with a serial I 2 C EEPROM for board identification and to store additional board related infor mation.

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BRD4104A Reference Manual RF Section

4. RF Section 4.1 Introduction

This section gives a short introduction to the RF section of the BRD4104A Radio Board.

4.2 Schematic of the RF Matching Network

The schematic of the RF section of the BRD4104A Radio Board is shown in the following figure.

VDCDC L102 1 2 BLM18AG601SN1 C102 100P Supply Filtering C103 10P GND HFXTAL_N U1B EFR32 10 RF Crystal HFXI RF I/O 2G4RF_IOP 17 2.4 GHz Matching Network L1 C1 2.4 GHz Path Selection R1 Antenna Tuning Component L2 AT1 Inverted-F Antenna 0R HFXTAL_P 11 HFXO 2G4RF_ION 16 PAVDD L103 1 2 BLM18AG601SN1 C106 220N 9 RF Analog Power RFVDD C107 18 PA Power PAVDD 10P Ground RFVSS 14 PAVSS 15 R2 0R NM GND GND

Figure 4.1. Schematic of the RF Section of the BRD4104A

P1 1 3 2 U.FL

UFL GND Connector GND INVERTED_F

4.2.1 Description of the 2.4 GHz RF Matching

The 2.4 GHz matching connects the 2G4RF_IOP pin to the on-board printed Inverted-F Antenna. The 2G4RF_ION pin is connected to ground. For lower output powers (under 13 dBm) additional harmonic filtering is not required as the harmonic levels are below the regu lation limits (see Chapter

7.1 Conducted Power Measurements ). Therefore, the matching network comprises only a two-element impe-

dance matching circuitry. The targeted output power is 10 dBm.

For for conducted measurements the output of the matching network can also be connected to the UFL connector by removing the series R1 resistor between the antenna and the output of the matching and adding a 0 Ohm resistor to the R2 resistor position between the output of the matching and the UFL connector.

4.3 RF Section Power Supply

On the BRD4104A Radio Board the power supply pins of the RF section (RFVDD, PAVDD) are directly connected to the output of the on-chip DC-DC converter. This way, by default, the DC-DC converter provides 1.8 V for the entire RF section (for details, see the sche matic of the BRD4104A).

4.4 Bill of Materials for the 2.4 GHz Matching

The Bill of Materials of the 2.4 GHz matching network of the BRD4104A Radio Board is shown in the following table.

Table 4.1. Bill of Materials for the BRD4104A 2.4GHz RF Matching Network Component name

L1 C1

Value

1.9 nH 1.5 pF

Manufacturer

Murata Murata

Part Number

LQP15MN1N9W02D GRM1555C1H1R05WA01D

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BRD4104A Reference Manual RF Section

4.5 Inverted-F Antenna

The BRD4104A Radio Board includes an on-board printed inverted-F antenna tuned for the 2.4 GHz band. Due to the design restric tions of the Radio Board, the input of the antenna and the output of the matching network can't be placed directly next to each other. As a result, a 50 Ohm transmission line was necessary to connect them. With the actual line length the impedance of the antenna at the double-harmonic frequency is transformed closer to a critical impedance range. This reduces the low-pass filter effect of the matching network resulting in the increase of the radiated level of the harmonic.

To reduce the harmonic radiation a tuning component was used between the matching network output and the antenna input. For the actual Radio Board design (with the actual transmission line length) a small value inductor was used (L2 inductor with value of 1.9 nH) to transform the impedance at the double-frequency harmonic away from the critical region while keeping the impedance at the funa mental close to 50 Ohm. With this the suppression of the radiated double-frequency harmonic increases by approximately 12 dB. The resulting impedance is shown in the following figure.

Figure 4.2. Impedance and Reflection of the Inverted-F Antenna of the BRD4104A Board Measured from the Matching Output Note:

The suppression of the double-frequency harmonic can be further increased by using a sligthly higher inductor value but for the current board the suppression achieved with 1.9 nH is sufficient (see Chapter

7.2 Radiated Power Measurements ). Therefore, for BOM

cost reduction the same value and type of inductor was used as the one in the 2.4 GHz matching network (L1).

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5. Mechanical Details

The BRD4104A Radio Board is illustrated in the figures below.

DC-DC Inductor 30 mm DC-DC & Supply Filter Caps.

Serial Flash Frame of the Optional Shielding Can EFR32xx 45 mm

Figure 5.1. BRD4104A Top View

Antenna Tuning Component 2.4 GHz Path Selection 5 mm Display Enable Selection 24 mm Board Identification BRD4104A Reference Manual Mechanical Details 27.3 mm 28.6 mm 15 mm PAVDD Supply Selection WSTK Sensor Enable Selection Interface Connector Interface Connector

Figure 5.2. BRD4104A Bottom View silabs.com

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BRD4104A Reference Manual EMC Compliance

6. EMC Compliance 6.1 Introduction

Compliance of the fundamental and harmonic levels of the BRD4104A Radio Board is tested against the following standards: • 2.4 GHz: • ETSI EN 300-328 • FCC 15.247

6.2 EMC Regulations for 2.4 GHz 6.2.1 ETSI EN 300-328 Emission Limits for the 2400-2483.5 MHz Band

Based on ETSI EN 300-328 the allowed maximum fundamental power for the 2400-2483.5 MHz band is 20 dBm EIRP. For the unwan ted emissions in the 1 GHz to 12.75 GHz domain the specified limit is -30 dBm EIRP.

6.2.2 FCC15.247 Emission Limits for the 2400-2483.5 MHz Band

FCC 15.247 allows conducted output power up to 1 Watt (30 dBm) in the 2400-2483.5 MHz band. For spurious emmissions the limit is -20 dBc based on either conducted or radiated measurement, if the emission is not in a restricted band. The restricted bands are speci fied in FCC 15.205. In these bands the spurious emission levels must meet the levels set out in FCC 15.209. In the range from 960 MHz to the frequency of the 5th harmonic it is defined as 0.5 mV/m at 3 m distance which equals to -41.2 dBm in EIRP.

Additionally, for spurious frequencies above 1 GHz, FCC 15.35 allows duty-cycle relaxation to the regulatory limits. For the EmberZNet PRO the relaxation is 3.6 dB. Therefore, the -41.2 dBm limit can be modified to -37.6 dBm.

If operating in the 2400-2483.5 MHz band the 2nd, 3rd and 5th harmonics can fall into restricted bands. As a result, for those the -37.6 dBm limit should be applied. For the 4th harmonic the -20 dBc limit should be applied.

6.2.3 Applied Emission Limits for the 2.4 GHz Band

The above ETSI limits are applied both for conducted and radiated measurements.

The FCC restricted band limits are radiated limits only. Besides that, Silicon Labs applies those to the conducted spectrum i.e. it is as sumed that, in case of a custom board, an antenna is used which has 0 dB gain at the fundamental and the harmonic frequencies. In that theoretical case, based on the conducted measurement, the compliance with the radiated limits can be estimated.

The overall applied limits are shown in the table below.

Table 6.1. Applied Limits for Spurious Emissions for the 2.4 GHz Band Harmonic

2nd 3rd 4th 5th

Frequency

4800~4967 MHz 7200~7450.5 MHz 9600~9934 MHz 12000~12417.5 MHz

Limit

-37.6 dBm -37.6 dBm -30 dBm -37.6 dBm

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BRD4104A Reference Manual RF Performance

7. RF Performance 7.1 Conducted Power Measurements

During measurements, the BRD4104A Radio Board was attached to a Wireless Starter Kit Mainboard which was supplied by USB. The voltage supply for the Radio Board was 3.3 V.

7.1.1 Conducted Measurements in the 2.4 GHz band

The BRD4104A Radio Board was connected directly to a Spectrum Analyzer through its UFL connector (the R1 resistor was removed and a 0 Ohm resistor was soldered to the R2 resistor position). The supply for the RF section (RFVDD) and the 2.4 GHz power amplifi er (PAVDD) was 1.8 V provided by the on-chip DC-DC converter; for details, see the schematic of the BRD4104A. The transceiver was operated in continuous carrier transmission mode. The output power of the radio was set to 10 dBm.

The typical output spectrum is shown in the following figure.

Figure 7.1. Typical Output Spectrum of the BRD4104A

As it can be observed, the fundamental is close to 10 dBm and all of the unwanted emissions are under the -37.6 dBm applied limit.

Note:

The conducted measurement is performed by connecting the on-board UFL connector to a Spectrum Analyzer through an SMA Conversion Adapter (P/N: HRMJ-U.FLP(40)). This connection itself introduces approximately 0.3 dB insertion loss.

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BRD4104A Reference Manual RF Performance

7.2 Radiated Power Measurements

During measurements, the BRD4104A Radio Board was attached to a Wireless Starter Kit Mainboard which was supplied by USB. The voltage supply for the Radio Board was 3.3 V. The radiated power was measured in an antenna chamber by rotating the board 360 de grees with horizontal and vertical reference antenna polarizations in the XY, XZ and YZ cuts. The measurement planes are shown in the figure below.

Figure 7.2. Illustration of reference planes with a Radio Board plugged into the Wireless Starter Kit Mainboard Note:

The radiated measurement results presented in this document were recorded in an unlicensed antenna chamber. Also the radi ated power levels may change depending on the actual application (PCB size, used antenna, and so on). Therefore, the absolute levels and margins of the final application are recommended to be verified in a licensed EMC testhouse.

7.2.1 Radiated Measurements in the 2.4 GHz band

For the transmitter antenna the on-board printed inverted-F antenna of the BRD4104A Radio Board was used (the R1 resistor was mounted). The supply for the RF section (RFVDD) and the 2.4 GHz power amplifier (PAVDD) was 1.8 V provided by the on-chip DC-DC converter; for details, see the schematic of the BRD4104A. The transceiver was operated in continuous carrier transmission mode. The output power of the radio was set to 10 dBm based on the conducted measurement.

The results are shown in the table below.

Table 7.1. Maximums of the measured radiated powers in EIRP [dBm] Frequency

Fund 2nd 3rd

EIRP [dBm]

12.9

-56.6

<-50 * 4th 5th <-50 * <-50 * * Signal level is below the Spectrum Analyzer noise floor.

Orientation

YZ/V YZ/H -/ -/ -/-

Margin [dB]

17.1

19 >10 >10 >10

Limit in EIRP [dBm]

30 -37.6

-37.6

-30 -37.6

As it can be observed, thanks to the high gain of the inverted-F antenna, the level of the fundamental is higher than 10 dBm. The stron gest harmonic is the double-frequency one and thanks to the additional suppression provided by the L2 inductor its level is under -50 dBm.

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BRD4104A Reference Manual EMC Compliance Recommendations

8. EMC Compliance Recommendations 8.1 Recommendations for 2.4 GHz ETSI EN 300-328 compliance

As it was shown in the previous chapter, the radiated power of the fundamental of the BRD4104A Blue Gecko Radio Board complies with the 20 dBm limit of the ETSI EN 300-328 both in case of the conducted and the radiated measurements. The harmonic emissions are under the -30 dBm limit. Although the BRD4104A Radio Board has an option for mounting a shielding can, that is not required for the compliance.

8.2 Recommendations for 2.4 GHz FCC 15.247 compliance

As it was shown in the previous chapter, the radiated power of the fundamental of the BRD4104A Blue Gecko Radio Board complies with the 30 dBm limit of the FCC 15.247. The harmonic emissions are under the -37.6 dBm applied limit both in case of the conducted and the radiated measurements. Although the BRD4104A Radio Board has an option for mounting a shielding can, that is not required for the compliance.

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9. Document Revision History Revision 1.0

2017-05-22 Initial document revision.

BRD4104A Reference Manual Document Revision History

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10. Board Revision History Radio Board Revision

A00

Description

Initial revision.

Table 10.1. BRD4104A Radio Board Revisions

BRD4104A Reference Manual Board Revision History

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11. Errata

There are no known errata at present.

BRD4104A Reference Manual Errata

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Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Silicon Labs shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any Life Support System without the specific written consent of Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.

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Silicon Laboratories Inc.

400 West Cesar Chavez Austin, TX 78701 USA

http://www.silabs.com

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