FD7256U WIFI Module Datasheet V1.0 Shanghai Neardi Technology Co., Ltd. www.neardi.com FD7256U Shanghai Neardi Technology Co., Ltd. (referred to as "Neardi Technology") always adheres to the customer-first service tenet and provides customers with fast and efficient support services. If you have any needs, please feel free to contact our company, the contact information is as follows:
Shanghai Neardi Technology Co., Ltd. www.neardi.com Tel: +86 21 20952021 Email: sales@neardi.com Introduction Neardi Technology provides this document for customers to use as a reference for product design and terminal applications. It is recommended that customers confirm the specifications and parameters provided in the document in detail, and confirm whether it can meet the design or application of the required products. At the same time, it is strongly recommended that customers do detailed tests in actual application scenarios based on the samples provided by our company to ensure that they meet the end use requirements. Neardi Technology is not responsible for any damages suffered due to the use of documents, materials and product functions. The relevant parameters or design charts in this document are only examples, and customers should base their own independent analysis, evaluation and judgment when designing or using terminal products. Before customers use any design or service guided by this document, please read this statement carefully, understand and agree that although Neardi Technology has taken reasonable commercial efforts to provide the best possible experience, this document and its contents are PROVIDED TO YOU ON AN
"AS AVAILABLE" BASIS. The information in this document is subject to change without notice. Agreement Unless specifically authorized by Neardi Technology, the recipient of the product documentation, hardware reference drawings, software descriptions and other materials provided by our company must keep the received content confidential and shall not use it for any other purpose other than the implementation and development of this project. Copyright Statement Documents and information provided by our company may not be obtained, used or disclosed to third parties, or such copyrighted materials may be copied, reproduced, plagiarized, published, displayed, translated, distributed or merged, modified or created derivative works unless obtain prior written consent. Neardi Technology has exclusive rights to copyrighted materials and does not grant or convey a license to any patent, copyright, trademark or service mark rights, and no purchase of any kind shall be deemed to be the grant of a license. Neardi Technology has the right to pursue legal responsibility for any illegal infringements that violate confidentiality, use without authorization or maliciously use the documents and information in other illegal forms. 2023 Shanghai Neardi Technology Co., Ltd. All Rights Reserved. Version History Neardi Technology 1/ 28 www.neardi.com Version V1.0 Date 2024/01/12 Illustrate Initial Version FD7256U Neardi Technology 2/ 28 www.neardi.com FD7256U Contents Contents ...................................................................................................................... 3 1 Product Overview ................................................................................................. 5 1.1 Product Introduction ...................................................................................... 5 1.2 Wi-Fi Characteristics ..................................................................................... 6 1.3 Bluetooth Characteristics .............................................................................. 6 1.4 Block Diagram ............................................................................................... 7 1.5 Parameters .................................................................................................... 7 2 Pin Definition ........................................................................................................ 8 2.1 Pin Number ................................................................................................... 8 2.2 Pin Description .............................................................................................. 8 3 Mechanical Specifications .................................................................................. 10 3.1 Mechanical Dimensions .............................................................................. 10 3.2 Recommended PCB Layout Footprint .......................................................... 11 4 Electrical Performance and Reliability ............................................................... 12 4.1 Absolute Maximum Voltage Range ............................................................. 12 4.2 Recommended Operation Conditions ......................................................... 12 4.3 Power On/Off Sequence ............................................................................. 12 4.4 Reliability ..................................................................................................... 13 5 RF Characteristics ............................................................................................. 14 5.1 2.4GHZ Wi-Fi Radio Frequency (RF) Characteristics ................................. 14 5.2 5GHZ Wi-Fi RF Characteristics ................................................................... 15 5.3 Bluetooth Radio Frequency (RF) Characteristics ........................................ 17 6 Hardware Design Guide ..................................................................................... 18 6.1 Power Design Notice ................................................................................... 18 6.1.1 Voltage Requirement ............................................................................... 18 6.1.2 Current Requirement ............................................................................... 18 6.1.3 Power Supply Reference ......................................................................... 19 Interface Design Notice ............................................................................... 19 6.2.1 HCI Commend Interface .......................................................................... 19 6.2 Neardi Technology 3/ 28 www.neardi.com FD7256U 7 Storage,Production and Packaging ................................................................... 20 7.1 Storage Conditions ...................................................................................... 20 7.2 Production Welding ..................................................................................... 20 7.3 Packing Specifications ................................................................................ 21 7.3.1 Tape Dimensions ..................................................................................... 22 7.3.2 Plastic Reel Dimensions .......................................................................... 22 7.3.3 Packaging Process .................................................................................. 23 8 Antenna Design ................................................................................................. 23 8.1 Summarize ............................................................................................... 23 8.2 List of applicable FCC rules ..................................................................... 24 8.3 Specific Operational Use Conditions - Antenna Placement Within the Host Platform.............................................................................................................. 24 8.4 Limited Module Procedures..................................................................... 24 8.5 Trace Antenna Designs ............................................................................ 24 8.6 RF Exposure Considerations ................................................................... 28 8.7 Antenna Type and Gain ............................................................................ 26 8.8 End Product Labelling Compliance Information......................................... 27 8.9 Information on Test Modes and Additional Testing Requirements........... 27 8.10 8.11 8.12 Additional testing, Part 15 Subpart B Disclaimer .................................. 28 Manual Information to The End User .................................................... 28 How to Make Changes - Important Note ............................................... 28 Neardi Technology 4/ 28 www.neardi.com FD7256U 1 Product Overview 1.1 Product Introduction FD7256U is a highly integrated, low-cost combo module with high-performance and low-power. It supports Wi-Fi 6 and Bluetooth 5.0 protocol, supports Wi-Fi MAC of the final version of Wi-Fi 6 Wave2 protocol, Wi-Fi Baseband of 1T1R, and high-performance RF. It also supports USB2.0, HS-UART and PCM interfaces for connection with the main control. This module also supports BT and Wi-Fi to work in coexistence mode. It is suitable for consumer electronics such as CPE, IPC, tablet and IOT, and can also be used in fields with high reliability requirements such as industrial interconnection. Figure 1-1 Neardi Technology 5/ 28 www.neardi.com 1.2 Wi-Fi Characteristics IEEE 802.11a/b/g/n/ac/ax (supports wave-2) wireless LAN communication FD7256U protocol IEEE 802.11 d/e/h/i/k/mc/r/v/w Phy rate up to 600.8Mbps, Throughput rate up to 260Mbps Multiple modes such as Wi-Fi STA, AP, and P2P 80MHz bandwidth, 1T/1R Up to 1024QAM modulation, supports LDPC and STBC UL/DL OFDMA, DL MU-MIMO QoS, WFA WMM, WMM PS RSSI and CSI Reporting Beamformee and 4*1 Tx Beamforming WPA, WPA2, WPA3 encryption and decryption, WAPI and WPS2.0 ER, DCM to improve transceiver gain 20in40/80/160, Partial band MU MIMO to improve air interface utilization;
BSS Color, Spatial Reuse to improve air interface utilization TWT, Intra-PPDU PS, VHT TXOP PS to optimize dynamic power consumption in small bandwidth and multi-BSS environment 1.3 Bluetooth Characteristics Support Bluetooth (Classic BT+BLE) v2.1, v3.0, v4.2, v5.0 features USB2.0 interface for BT data transmission PCM/IIS interface for audio transmission BR/EDR/LE 1M/LE 2M/LE LR Support sco and esco link SSP/Secure Connection Low power mode (sniff, sniff sub-rating) Support BT/Wi-Fi coexistence Neardi Technology 6/ 28 www.neardi.com 1.4 Block Diagram FD7256U Figure 1-4 1.5 Parameters Product Name FD7256U Product description 802.11ax/ac/a/b/g/n 1T1R dual band Wi-Fi and Bluetooth 5.0 comb module Table 1-5 Dimension Power supply Host interface Footprint 13(0.1)mm*12.2(0.1)mm*1.65(0.2)mm VBAT3.0~3.6V USB2.0 LCC 22pin Operating temperature
-30C to 70C Operating humidity 10% to 90% (Non-Condensing) Storage temperature
- 40C to 85C Neardi Technology 7/ 28 www.neardi.com FD7256U 2 Pin Definition 2.1 Pin Number Figure 2-1 2.2 Pin Description Pin Number Pin Name Pin Type Pin Description Table 2 -2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND WL_BT_ANT NC GND NC NC NC NC NC NC VBAT USB_DM USB_DP GND G RF
G
P I/O I/O G Ground connections RF I/O port Floating (Dont connected to ground) Ground connections Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Main power voltage source input USB Transmitter/Receiver Differential Pair USB Transmitter/Receiver Differential Pair Ground connections Neardi Technology 8/ 28 www.neardi.com FD7256U 15 16 17 18 19 20 21 22 NC NC NC CHIP_EN NC NC NC NC
I
Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Module enable signal Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Floating (Dont connected to ground) Neardi Technology 9/ 28 www.neardi.com FD7256U 3 Mechanical Specifications 3.1 Mechanical Dimensions Figure 3-1 Neardi Technology 10/ 28 www.neardi.com 3.2 Recommended PCB Layout Footprint FD7256U Figure 3-2 Neardi Technology 11/ 28 www.neardi.com FD7256U 4 Electrical Performance and Reliability 4.1 Absolute Maximum Voltage Range Symbol Description VBAT Power Supply Voltage Min
-0.5 Table 4-1 Max 5.251 Unit V 4.2 Recommended Operation Conditions Symbol Description Ta Ambient Operating Temperature Antenna External Antenna VSWR VBAT Power Supply Voltage 4.3 Power On/Off Sequence Table 4-2 Min
-30
3.0 Type 25 1.92:1 3.3 Max 70 2:1 3.6 Unit V Figure 4 -3 Symbol T1 T2 T3 Description VBAT Ramp up time CHIP_EN should be powered on after VDDIO is powered on CHIP_EN reset time Table 4-3 Min 0.2 0 50 Type 0.5
Max
Unit mS mS mS 1 If the voltage exceeds this value, the chip will be irreversibly damaged. Neardi Technology 12/ 28 www.neardi.com 4.4 Reliability FD7256U Table 4-4 Item Test Model Class ESD Latch-up HBM CDM Current Voltage 2 C2a II A II A Level 2000V 500V 200mA Criteria ANSI/ESDA/JEDEC JS-001-2017 ANSI/ESDA/JEDEC JS-002-2018 JEDEC STANDARD NO.78F JANUARY 2022 1.5xVmax JEDEC STANDARD NO.78F JANUARY 2022 Neardi Technology 13/ 28 www.neardi.com FD7256U 5 RF Characteristics 5.1 2.4GHZ Wi-Fi Radio Frequency (RF) Characteristics Table 5 -1 Conditions: VBAT=3.3V; VDDIO=1.8V; Ta:25 Features Description Wi-Fi Standard IEEE 802.11b/g/n/ac/ax Frequency Range 2.4~2.4835GHz(2.4GHz ISM Band) Channels Ch1~Ch13 Modulation Date Rate 802.11b (DSSS): CCK, DQPSK, DBPSK;
802.11g (OFDM): BPSK, QPSK, QAM16, QAM64;
802.11n (OFDM): BPSK, QPSK, QAM16, QAM64;
802.11ac (OFDM): BPSK, QPSK, QAM16, QAM64, QAM256;
802.11ax (OFDMA): BPSK, BPSK_DCM, QPSK, QPSK_DCM, QAM16, QAM16_DCM, QAM64, QAM256, QAM1024;
802.11b: 1, 2, 5.5, 11Mbps;
802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps;
802.11n (HT20): MCS0~MCS7 6.5~72.2Mbps;
802.11n (HT40): MCS0~MCS7 13.5~150Mbps;
802.11ac(VHT20): MCS0~MCS8 6.5~86.7Mbps;
802.11ac(VHT40): MCS0~MCS9 13.5~200Mbps;
802.11ax (HE20): MCS0~MCS11 8~143.4Mbps;
802.11ax (HE40): MCS0~MCS11 16~286.8Mbps;
Frequency Tolerance 5ppm 2.4G Transmitter Specifications Modulation 802.11b 802.11b 802.11g 802.11g 802.11n 802.11n 802.11n 802.11n 802.11ac 802.11ac 802.11ac 802.11ac 802.11ax TX Rate 1Mbps 11Mbps 6Mbps 54Mbps HT20 MCS0 HT20 MCS7 HT40 MCS0 HT40 MCS7 VHT20 MCS0 VHT20 MCS8 VHT40 MCS0 VHT40 MCS9 HE20 MCS0 TX EVMdB TX Mask VBAT currentmA 35%
35%
-5
-25
-5
-27
-5
-27
-5
-30
-5
-32
-5 PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS 470 303 318 385 305 303 302 275 305 270 296 230 280 Neardi Technology 14/ 28 www.neardi.com 802.11ax 802.11ax 802.11ax HE20 MCS11 HE40 MCS0 HE40 MCS11 2.4G Receiver Specifications Modulation RX Rate 802.11b 802.11b 802.11g 802.11g 802.11n 802.11n 802.11n 802.11n 802.11ac 802.11ac 802.11ac 802.11ac 802.11ax 802.11ax 802.11ax 802.11ax 1Mbps 11Mbps 6Mbps 54Mbps HT20 MCS0 HT20 MCS7 HT40 MCS0 HT40 MCS7 VHT20 MCS0 VHT20 MCS8 VHT40 MCS0 VHT40 MCS9 HE20 MCS0 HE20 MCS11 HE40 MCS0 HE40 MCS11
-96
-87
-92
-75
-92
-72
-89
-70
-91
-68
-89
-63
-92
-60
-89
-58 FD7256U
-35
-5
-35 PASS PASS PASS 254 279 193 Min Input Level dBm Max Input LeveldBm PER VBAT currentmA
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5 8%
8%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
118 118 118 117 122 120 126 121 122 119 126 122 123 119 126 121 Table 5 -2 5.2 5GHZ Wi-Fi RF Characteristics Conditions: VBAT=3.3V; VDDIO=1.8V; Ta:25 Features Description Wi-Fi Standard IEEE 802.11a/n/ac/ax Frequency Range 5.15~5.25GHz; 5.25~5.35GHz; 5.47~5.73GHz; 5.735~5.835GHz (5GHz ISM Band) Channels Ch36,Ch40, Ch44, Ch48; Ch52~Ch64; Ch100~Ch140; Ch149~Ch165 802.11a (OFDM): BPSK, QPSK, QAM16, QAM64;
802.11n (OFDM): BPSK, QPSK, QAM16, QAM64;
Modulation 802.11ac (OFDM): BPSK, QPSK, QAM16, QAM64, QAM256;
802.11ax (OFDMA): BPSK, BPSK_DCM, QPSK, QPSK_DCM, QAM16, QAM16_DCM, QAM64, QAM256, QAM1024;
802.11a: 6, 9, 12, 18, 24, 36, 48, 54Mbps;
802.11n (HT20): MCS0~MCS7: 6.5~72.2Mbps;
802.11n (HT40): MCS0~MCS7: 13.5~150Mbps;
Date Rate 802.11ac (VHT20): MCS0~MCS8: 6.5~86.7Mbps;
802.11ac (VHT40): MCS0~MCS9: 13.5~200Mbps;
802.11ax (HE20): MCS0~MCS11: 8~143.4Mbps;
802.11ax (HE40): MCS0~MCS11: 16~286.8Mbps;
Neardi Technology 15/ 28 www.neardi.com Frequency Tolerance 5ppm 5G Transmitter Specifications Modulation TX Rate TX EVMdB TX Mask 802.11a 802.11a 802.11n 802.11n 802.11n 802.11n 802.11ac 802.11ac 802.11ac 802.11ac 802.11ac 802.11ac 802.11ax 802.11ax 802.11ax 802.11ax 802.11ax 802.11ax 6Mbps 54Mbps HT20 MCS0 HT20 MCS7 HT40 MCS0 HT40 MCS7 VHT20 MCS0 VHT20 MCS8 VHT40 MCS0 VHT40 MCS9 VHT80 MCS0 VHT80 MCS9 HE20 MCS0 HE20 MCS11 HE40 MCS0 HE40 MCS11 HE80 MCS0 HE80 MCS11
-5
-25
-5
-27
-5
-27
-5
-30
-5
-32
-5
-32
-5
-35
-5
-35
-5
-35 5G Receiver Specifications Modulation RX Rate Min Input LeveldBm Max Input Level dBm 802.11a 802.11a 802.11n 802.11n 802.11n 802.11n 802.11ac 802.11ac 802.11ac 802.11ac 802.11ac 802.11ac 802.11ax 802.11ax 802.11ax 802.11ax 802.11ax 802.11ax 6Mbps 54Mbps HT20 MCS0 HT20 MCS7 HT40 MCS0 HT40 MCS7 VHT20 MCS0 VHT20 MCS8 VHT40 MCS0 VHT40 MCS9 VHT80 MCS0 VHT80 MCS9 HE20 MCS0 HE20 MCS11 HE40 MCS0 HE40 MCS11 HE80 MCS0 HE80 MCS11
-91
-74
-91
-71
-88
-69
-91
-67
-88
-63
-85
-59
-91
-60
-89
-58
-86
-53
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5 PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS PER 10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
FD7256U VBAT current mA 276 342 273 276 258 232 273 242 258 186 256 285 247 221 243 149 246 267 VBAT current mA 87.5 88.1 90.5 92.7 94.1 98.2 90.9 92.4 95.6 98.7 102.5 109.2 92.1 92.5 96.7 96.6 105.3 106.5 Neardi Technology 16/ 28 www.neardi.com 5.3 Bluetooth Radio Frequency (RF) Characteristics FD7256U Table 5 -3 Conditions: VBAT=3.3V; VDDIO=1.8V; Ta:25 Features Description Bluetooth Standard Bluetooth v2.1+EDR/3.0+HS/4.2/5. 0 Frequency Range 2.4~2.4835GHz Channels Power class Bluetooth Classic: Ch0~Ch78 (For 1MHz Channels);
Bluetooth Low Energy: Ch0~Ch39 (For 2MHz Channels);
Bluetooth Classic: Class1;
Bluetooth Low Energy: Class1.5;
BR_1Mbps: GFSK;
EDR_2Mbps: /4-DQPSK;
EDR_3Mbps: 8DPSK;
Modulation LE_125Kbps: GFSK (Coded_S=8);
LE_500Kbps: GFSK (Coded_S=2);
LE_1Mbps: GFSK (Uncoded);
LE_2Mbps: GFSK (Uncoded);
Bluetooth Receiver Specifications Item BR_1M EDR_2M /3M LE_125/500K LE_1M LE_2M SensitivitydBm Max Input LeveldBm Input Level (Typ) TBD TBD TBD TBD TBD BER TBD TBD TBD TBD TBD Input Level (Typ) TBD TBD TBD TBD TBD BER TBD TBD TBD TBD TBD VBAT current mA TBD TBD TBD TBD TBD Neardi Technology 17/ 28 www.neardi.com FD7256U 6 Hardware Design Guide 6.1 Power Design Notice 6.1.1 Voltage Requirement The main power supply (VBAT) input range of the module is 3.3V+/-10%, and the interface VDDIO supports two level ranges, 1.8V+/-10% or 3.3V+/-10%. Due to the ripple of the main power can affect the RF performance of Wi-Fi and Bluetooth, therefore the power supply ripple VPP is required to be less than 50mV. 6.1.2 Current Requirement Under different standards, when Wi-Fi transmits continuously, the peak value and amplitude of the operating current on the main power supply are as shown in the table below. The 3.3V power converter must be able to provide 650mA RMS current and fast transient response (when the transient current change rate is 80mA/us, the voltage drop is less than 100mV). Mode 11b 11M long 2.4G ch1 11ax MCS0 2.4G CH1 11ax MCS0 5G CH36 Burst power (dBm) Peak current (mA) RMS current (mA) Table 6-1-2 23.5 21.8 19.6 17.4 15.5 22 20 18 16 22 19.9 18 16 833 753 647 593 566 720 640 587 553 827 667 620 540 607 573 473 440 407 500 427 420 393 560 433 380 307 Neardi Technology 18/ 28 www.neardi.com FD7256U 6.1.3 Power Supply Reference It is recommended to use a separate power regulator to power the module. The ripples caused by other current loads will affect the RF performance of the module. Therefore, it is not recommended to share the power supply with other devices in the system. It is recommended to use SILERGY's Synchronous Step-down Regulator SY8089AAC as the main power supply VBAT of the module. The circuit schematic is as follows:
Figure 6-1-3 For the power on/off sequence of the module, please refer to the requirements in the "4.3 Power On/Off Sequence" chapter. 6.2 Interface Design Notice 6.2.1 HCI Commend Interface The Bluetooth supports USB2.0 as HCI (Host Controller Interface). Neardi Technology 19/ 28 www.neardi.com FD7256U 7 Storage,Production and Packaging 7.1 Storage Conditions FD7256U module is 3 (MSL3) and packed in a vacuum-sealed bag when shipped, the recommended storage temperature is 255C, and the relative humidity is 35%~60%. Under this condition, the module can be stored for 12 months. The Module shall be stored without opening the packing. After the packing opened, the module shall be completed the patch soldering within 24 hours. FD7256U module can be stored for no more than 168 hours in a workshop environment with a temperature of 255C, a relative humidity below 60% and in compliance with IPC/JEDEC J-STD-033. It is not recommended to expose the module unpacked to the air for a long time. If not immediately patch soldering, it is recommended to store the module in a moisture-proof cabinet with a relative humidity of less than 10% to keep the module dry. If the module is not stored according to the above recommended method, it needs to be baked at high temperature (1205C) for 8 hours. The re-baked module shall be patched within 24 hours. Please pay attention to ESD protection when unpacking and handling modules. 7.2 Production Welding During the production welding process, please do not use any organic solvents (such as alcohol, isopropanol, acetone, trichloroethylene, etc.) to wipe the shield of the FD7256U module, otherwise it may cause the shield to rust. Please do not ultrasonically clean the module, it may cause damage to the crystal inside the module. Please make sure that the spray material used will not chemically react with the module shield or PCB and will not flow into the module when spraying modules. In order to ensure the welding quality and reliability of the FD7256U module, the thickness of the printed stencil is recommended to be 0.15~0.18mm; the recommended reflow curve is as follows:
Neardi Technology 20/ 28 www.neardi.com FD7256U Figure 7 -2 Recommended reflow curve Item Description Endothermic Zone Heating Rate Soak time Reflow Zone Heating Rate Maximum Temperature Cooling Rate Reflow Time Interval A From the end of interval A to the beginning of interval B Interval C Highest point of the curve Interval D Interval E Table 7 -2 Value 3/s 60~120s 3 /s 246(+5/-0) 6 /s 60~150 seconds 7.3 Packing Specifications The key parameters and packaging processes described in this chapter are for reference only. The appearance and structure of the specific packaging materials are subject to actual delivery. Neardi Technology 21/ 28 www.neardi.com 7.3.1 Tape Dimensions FD7256U Figure 7-3-1 Tape dimensions W 24 P 16 T 0.35 A0 12.6 B0 13.4 K0 2.5 F 11.5 E. 1.75 Unit mm Table 7-3-1 7.3.2 Plastic Reel Dimensions Figure 7-3-2 Tape dimension D1 330 D2 100 W 24 Table 7-3-2 unit mm Neardi Technology 22/ 28 www.neardi.com FD7256U 7.3.3 Packaging Process Figure 7-3-3 Package specification 8 Antenna Design 8.1 Summarize This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Neardi Technology 23/ 28 www.neardi.com FD7256U
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help. This modular has been tested and found to comply with part 15 requirements for Modular Approval.
- FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
- Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01r01 8.2 List of applicable FCC rules CFR 47 FCC Part 15 Subpart C and Subpart F has been investigated. It is applicable to the modular transmitter 8.3 Specific Operational Use Conditions - Antenna Placement Within the Host Platform The module is tested for standalone mobile RF exposure use condition. The antenna must be installed such that 20cm is maintained between the antenna and users, The transmitter module may not be co-located with any other transmitter or antenna. In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product
(including the transmitter) and obtaining a separate FCC authorization. 8.4 Limited Module Procedures Not applicable 8.5 Trace Antenna Designs Users should connect antennas to half hole pad through copper tube structure or FP types of RF trace and the trace impedance must be controlled in 50.recommends that the total insertion loss between the antenna pads and antennas should meet Neardi Technology 24/ 28 www.neardi.com FD7256U the following requirements:
Frequency 2400MHz-2500MHz 5150MHz-5850MHz Loss 0.6dB 1.2dB To facilitate the antenna tuning and certification test, a RF connector and an antenna matching circuit should be added. The following figure is the recommended circuit. The module needs to be attached to the PCB board and connected to the external antenna through the solder joint of the circuit on the PCB. The gain of the external antenna is 2dB i Max.,the internal structure is copper tube structure or FPC. A resistance of 0R is added between the module and the antenna at C1003 to ensure that the impedance of the connection between the module and the antenna reaches 50R.The J0800 position on the PCB is where the external antenna is connected. RF traces layout 1.Keep the RF trace from module ant pin to antenna as short as possible 2.RF trace should be 50 either on the top layer or in the inner layer 3.RF trace should be avoided right angle and sharp angle. 4.Put enough GND vias around RF traces. 5.RF trace should be far away from other high speed signal lines. Neardi Technology 25/ 28 www.neardi.com FD7256U External Antenna VSWR Parameters External Antenna VSWR Min Typ 1.6 Max 2.0 8.6 RF Exposure Considerations This device complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. 8.7 Antenna Type and Gain The following antennas have been certified for use with this module. Only antennas of the same type with equal or lower gain may also be used with this module. Other types of antennas and/or higher gain antennas may require the additional authorization for operation. Antenna Specification list below:
Model Type Connector FD200U External Antenna
Peak gain ( dBi ) 2400-2483.5 5150-5250 5250-5350 5470-5725 5725-5850 MHz 2.00dBi MHz 2.00dBi MHz 2.00dBi MHz 2.00dBi MHz 2.00dBi Neardi Technology 26/28 www.neardi.com FD7256U 8.8 End Product Labelling Compliance Information When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily removed. If not, a second label must be placed on the outside of the final device that contains the following text: Contains FCC ID: 2BFAK-FD200U. The FCC ID can be used only when all FCC compliance requirements are met. 8.9 Information on Test Modes and Additional Testing Requirements This transmitter is tested in a standalone mobile RF exposure condition and any co-located or simultaneous transmission with other transmitter(s) class II permissive change re-evaluation or new FCC authorization. Host manufacturer installed this modular with single modular approval should perform the test of radiated emission and spurious emission according to FCC part 15C, Part 15E, 15.209, 15.207 requirement, only if the test result comply with FCC part 15C, Part 15E, 15.209, 15.207 requirement, then the host can be sold legally. Neardi Technology 27/ 28 www.neardi.com 8.10 Additional testing, Part 15 Subpart B Disclaimer This transmitter modular us tested as a subsystem and its certification does not cover the FCC Part 15 Subpart B rules requirement applicable to the final host. The final host will still need to be reassessed for compliance to this portion of rules requirements if applicable. As long as all conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this modular installed. 8.11 Manual Information to The End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The host integrator must follow the integration instructions provided in this document and ensure that the composite system end product complies with the requirements by a technical assessment or evaluation to the rules and to KDB Publication 996369. The host integrator installing this module into their product must ensure that the final composite product complies with the requirements by a technical assessment or evaluation to the rules, including the transmitter operation and should refer to guidance in KDB Publication 996369. OEM/Host Manufacturer Responsibilities OEM/Host manufacturers are ultimately responsible for the compliance of the Host and Module. The final product must be reassessed against all the essential requirements of the FCC rule such as FCC Part 15 Subpart B before it can be placed on the US market. This includes reassessing the transmitter module for compliance with the Radio and RF Exposure essential requirements of the FCC rules. 8.12 How to Make Changes - Important Note In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product
(including the transmitter) and obtaining a separate FCC authorization. Neardi Technology 28/ 28 www.neardi.com