6221B-UUC Wi-Fi Dual-band 1x1 11ac + Bluetooth 4.2 Combo Module Datasheet FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 6221B-UUC Module Datasheet Office: 6 Floor, Building U6, Junxiang U8 Park, Hangcheng Avenue, Bao'an District, Shenzhen City, CHINA Factory: No.8, Litong Road, Liuyang Economic & Technical Development Zone, Changsha, Hunan, CHINA TEL: +86-755-2955-8186 Website: www.fn-link.com Customer Approval :
Company Title Signature Date Fn-Link FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 6221B-UUC Revision History Version Date Revision Content Draft Approved 1.0 1.1 1.2 1.3 1.4 2019/10/29 Initial Release Wesley Stone 2019/11/08 Update section 4, 5 and 7 for CHIP_EN pin and thermal pad. Update RF spec, add consumption 2019/12/06 data. 2020/03/10 Refine section 2. 2020/03/11 Modify freq. tolerance spec. Wesley Stone Wesley Stone Wesley Wesley Stone Stone FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 6221B-UUC CONTENTS 1 Overview ................................................................................................................ 1 1.1 Introduction ....................................................................................................... 1 1.2 Features ............................................................................................................ 1 1.3 Block Diagram ................................................................................................... 2 1.4 General Specification ........................................................................................ 2 1.5 Recommended Operating Rating ...................................................................... 2 1.6 EEPROM Information .................................................................................... 3 2 Wi-Fi RF Specification ........................................................................................... 4 2.1 Wi-Fi 2.4GHz RF Specification .......................................................................... 4 2.2 Wi-Fi 5GHz RF Specification ............................................................................. 4 3 Bluetooth Specification ......................................................................................... 6 3.1 Bluetooth Specification ...................................................................................... 6 4 Pin Assignments .................................................................................................... 7 4.1 Pin Outline ........................................................................................................ 7 4.2 Pin Definition ..................................................................................................... 7 5 Dimensions ............................................................................................................ 9 5.1 Physical Dimensions and Module Photo ........................................................... 9 5.2 Marking Description .......................................................................................... 9 5.3 Module Physical Dimensions .......................................................................... 10 5.4 Layout Recommendation ................................................................................ 11 6 Interface Timing Specification ............................................................................ 12 6.1 USB Bus Timing during Power On Sequence ................................................. 12 7 Reference Design ................................................................................................ 13 8 Ordering Information ........................................................................................... 13 9 The Key Material List ........................................................................................... 14 10 Recommended Reflow Profile .......................................................................... 14 11 Package Information ......................................................................................... 15 11.1 Reel ............................................................................................................... 15 11.2 Packaging Details .......................................................................................... 15 11.3 Moisture Sensitivity ....................................................................................... 16 FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 6221B-UUC 1 Overview 1.1 Introduction The 6221B-UUC is a low-cost and low-power consumption module which has all of the Wi-Fi functionalities. It is based on Realtek RTL8821CU chipset, a highly-integrated IEEE 802.11a/b/g/n/ac MAC/Baseband/RF WLAN and Bluetooth Baseband/RF single chip. For Wireless LAN (WLAN) operation, this module supports 1-stream 802.11ac solution with Multi-user MIMO STA mode with USB2.0 network interface controller. For Bluetooth operation, it supports Bluetooth 2.1/4.2. 6221B-UUC complies with IEEE 802.11a/b/g/n/ac standard and it can achieve up to a speed of 433.3Mbps with single stream in 802.11ac to connect to the WLAN. This compact module is a total solution for a combination of Wi-Fi and BT technologies. 1.2 Features Highly-integrated module for 5G 802.11ac, or 2.4G/5G 802.11n WLAN applications. Maximum PHY data rate up to 86.7MHz using 20MHz bandwidth, 200Mbps using 40Mhz bandwidth and 433.3Mbps using 80Mhz bandwidth. Backward compatible with 802.11a/b/g device. Support IEEE 802.11e QoS Enhancement and 802.11i (WPA, WPA2). Support IEEE 802.11h DFS. Wi-Fi Direct supports wireless peer to peer applications. Supports Bluetooth 4.2 and backward compatible with Bluetooth 2.1 + EDR. Bluetooth 4.0 Dual Mode support: Simultaneous LE and BR/EDR. Supports Bluetooth Low Energy. Enhanced BT/Wi-Fi Coexistence Control to improve transmission quality in different Integrated internal Class 1, Class 2 and Class 3 PA for Bluetooth. profiles. USB Multi-Function for both BT and WLAN. Single external power source 3.3V only. FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 1 1.3 Block Diagram 6221B-UUC 1.4 General Specification Model Name 6221B-UUC Product Description Support Wi-Fi/Bluetooth functionalities L x W x H: 15 x 13 x 2.35 mm Dimension Wi-Fi Interface BT Interface USB 2.0 USB 2.0 Operating temperature 0C to 70C Storage temperature
-40C to 125C RoHS All hardware components are fully compliant with EU RoHS directive 1.5 Recommended Operating Rating Operating Temperature Power Supply (VCC) Min. 0 3.135 Typ. Max. Unit 25 3.3 70 3.465 C V FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 2 6221B-UUC Current Consumption(mA) Condition WLAN/BT Disabled Wi-Fi 5G associated TX throughput
(5G 11ac VHT80) RX throughput
(5G 11ac VHT80) TX throughput
(5G 11n HT20) RX throughput
(5G 11n HT20) TX throughput
(5G 11a OFDM54) RX throughput
(5G 11a OFDM54) TX throughput
(2.4G 11n HT40) RX throughput
(2.4G 11n HT40) TX throughput
(2.4G 11b CCK11) RX throughput
(2.4G 11b CCK11) 2 93 264 136 320 107 266 130 291 115 283 141 Typical Power Consumption
(VCC=3.3V; BT on if no other statement) 1.6 EEPROM Information Wi-Fi Vendor ID Product ID FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 3 6221B-UUC 2 Wi-Fi RF Specification 2.1 Wi-Fi 2.4GHz RF Specification Feature Description WLAN Standard IEEE 802.11b/g/n, Wi-Fi compliant Frequency Range Channels 2.400 GHz ~ 2.497 GHz (2.4 GHz ISM Band) 2.4GHzCh1 ~ Ch14 Output Power 802.11b /11M : 16 1.5 dBm @ EVM -9dB 1M : 17 1.5 dBm @MASK comliant 802.11g /54M : 15 1.5 dBm @ EVM -26dB 6M : 17 1.5 dBm @MASK comliant 802.11n /MCS7 : 14 1.5 dBm @ EVM -29dB MCS0 : 17 1.5 dBm @MASK comliant Other data rate TX power control by power by rate Spectrum Mask Freq. Tolerance Receive Sensitivity
(11b) @8% PER Receive Sensitivity
(11g) @10% PER Receive Sensitivity
(11n,20MHz) @10% PER Receive Sensitivity
(11n,40MHz) @10% PER IEEE compliant 15 ppm
- 1Mbps: -92 dBm
- 11Mbps: -85 dBm
- 6Mbps: -89 dBm
- 54Mbps: -71 dBm
- MCS=0: -89 dBm
- MCS=7: -69 dBm
- MCS=0: -87 dBm
- MCS=7: -67 dBm 2.2 Wi-Fi 5GHz RF Specification Feature Description WLAN Standard IEEE 802.11a/n/ac, Wi-Fi compliant Frequency Range Number of Channels Modulation Output Power 4.900 GHz ~ 5.845 GHz (5.0 GHz ISM Band) 5.0GHz: Please refer to the table1 802.11a/n: 64-QAM,16-QAM, QPSK, BPSK 802.11ac: 256-QAM, 64-QAM,16-QAM, QPSK, BPSK 802.11a /54M: 14 dBm 1.5 dB @ EVM -27dB 6M: 16 dBm 1.5 dB @ MASK comliant FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 4 6221B-UUC 802.11n /MCS7: 13 dBm 1.5 dB @ EVM -29dB MCS0: 16 dBm 1.5 dB @ MASK comliant 802.11ac/MCS7: 13 dBm 1.5 dB @ EVM -29dB MCS0: 16 dBm 1.5 dB @ MASK comliant 802.11ac/MCS9: 10 dBm 1.5 dB @ EVM -33dB For other rate, Tx power is controlled by power by rate
- 6Mbps: -86 dBm
- 54Mbps: -70 dBm
- MCS=0: -85 dBm
- MCS=7: -67 dBm
- MCS=0: -83 dBm
- MCS=7: -64 dBm
- MCS=0: -86 dBm
- MCS=8: -63 dBm
- MCS=0: -83 dBm
- MCS=9: -59 dBm
- MCS=0: -80 dBm
- MCS=9: -56 dBm Operating Channel Number Channel Center Frequency(MHz) 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 5180 5200 5220 5240 5260 5280 5300 5320 5500 5520 5540 5560 5580 5600 5620 5640 5660 Receive Sensitivity
(11a) @10% PER Receive Sensitivity
(11n,20MHz) @10% PER Receive Sensitivity
(11n,40MHz) @10% PER Receive Sensitivity
(11ac,20MHz) @10% PER Receive Sensitivity
(11ac,40MHz) @10% PER Receive Sensitivity
(11ac,80MHz) @10% PER 15GHz Channel table Band (GHz) 5.15GHz~5.25GHz 5.25GHz~5.35GHz 5.5GHz~5.7GHz FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 5 6221B-UUC 136 140 149 153 157 161 165 5680 5700 5745 5765 5785 5805 5825 5.725GHz~5.825GHz 3 Bluetooth Specification 3.1 Bluetooth Specification Feature Description General Specification Bluetooth Standard Bluetooth V4.2 of 1, 2 and 3 Mbps. Antenna Reference Small antenna with 0~2 dBi peak gain Frequency Band 2402 MHz ~ 2480 MHz Number of Channels 79 channels Modulation GFSK, /4-DQPSK, 8DPSK RF Specification Output Power (Class 1.5) Sensitivity @ BER=0.1%
for GFSK (1Mbps) Sensitivity @ BER=0.01%
for /4-DQPSK (2Mbps) Sensitivity @ BER=0.01%
for 8DPSK (3Mbps) Min. 4 dBm Typical. Max. 8 dBm 12 dBm
-88 dBm
-85 dBm
-81 dBm Maximum Input Level
/4-DQPSK (2Mbps) :-20dBm GFSK (1Mbps):-20dBm 8DPSK (3Mbps) :-20dBm FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 6 6221B-UUC 4 Pin Assignments 4.1 Pin Outline
< TOP VIEW >
4.2 Pin Definition PIN Name Type Description Voltage 1 2 9 3~8 12 13 10~11 GND ANT0 GND ANT1 GND NC GND Ground connections I/O RF I/O chain0, Wi-Fi 5GHz and BT Ground connections I/O RF I/O chain1, Wi-Fi 2.4GHz Ground connections Not connected Ground connections FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 7 6221B-UUC NC Not connected WLAN_EN I Enable pin for WLAN device ON: pull high ; OFF: pull low 16 WL_WAKE_HOST 17~22 O WLAN to wake-up HOST Not connected Ground connections CHIP_EN I/O down RTL8821CU. 3.3V Enable pin for chipset. Pull low to shut
(Internal 47Kohm pull-high to 3.3V) Ground connections Not connected Ground connections Not connected Ground connections USB2.0 differential pair D+ for WLAN and Bluetooth USB2.0 differential pair D- for WLAN I/O I/O and Bluetooth Ground connections Not connected P Main power input 3.3V Ground connections BT_EN I Enable pin for Bluetooth device ON: pull high ; OFF: pull low Ground connections Not connected Ground connections Not connected I Ground connections HOST_WAKE_BT HOST to wake-up Bluetooth device BT_WAKE_HOST Bluetooth device to wake-up HOST I O 3.3V 3.3V P: POWER I: INPUT O: OUTPUT 26~27 29~30 14 15 23 24 25 28 31 32 33 34 35 36 37 38 39 46 47 48 49 50 40~45 NC GND GND NC GND NC GND USB_DP USB_DM GND NC VCC33 GND GND NC GND NC GND 3.3V 3.3V 3.3V 3.3V FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 8 6221B-UUC 5 Dimensions
(Unit: mm) 5.1 Physical Dimensions and Module Photo L x W : 15 x 13 mm
< TOP VIEW >
H: 2.35 mm Weight
< Side View >
0.92g 5.2 Marking Description
< TOP VIEW >
FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 9 6221B-UUC 5.3 Module Physical Dimensions
(Unit: mm)
< TOP VIEW >
2.650 2.250 1.750 2.650 2.250 1.750 0.875 0 0 4
. 1 0 0 9 1
. 0 0 3
. 2 0 0 8 1
. 0 0 8
. 1 1.800 1.800 0 0 0
. 5 1 0 0 0
. 0 0 1 0 2
. 8 0 0 8
. 7 0 0 0
. 6 0 0 3
. 2 0 0 9
. 1 0 0 4
. 1 0.875 4.500 6.300 6.700 8.500 13.000 FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 10 5.4 Layout Recommendation 6221B-UUC
(Unit: mm)
< TOP VIEW >
6,5 6,75 6,5 5,625 4,75 4,25 3,85 3,35 2,95 2,45 2,05 1,55 1,15 0,65 0,25 5 7
, 7 5
, 7 5 2 6 16
, 66 5
, 2 75
, 34
, 84
, 43
, 93 2
, 5 622
, 11 1
, 7
, 0 2
, 0 5
, 7 8
, 1 8
, 1 1,8 1,8 5 1 0 2 1 8
, 8
, 7 6 4,5 6,3 6,7 13 8,5 FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 11 6221B-UUC 6 Interface Timing Specification 6.1 USB Bus Timing during Power On Sequence Ton Tpor Txtal Tattach T1V0 Ten Ton: the main power ramp on duration Tpor: the power on reset releases and power management unit executes power on tasks Tattach: USB attach state Txtal: XTAL starts Ten: interval between the rising point of 3.3V and chip_en The power on flow description:
After main 3.3V ramp up, the internal power on reset is released by power ready detection circuit and the power management unit will be enabled. The power management unit enables the internal regulator and clock circuits. The power management unit also enables the USB circuits. USB analog circuits attach resisters to indicate the insertion of the USB device. The typical timing range:
Unit ms ms ms ms ms ms Min Typical Max
0 100 1.5 2 1.5 250 3 0 5 20 8
11 5 FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 12 6221B-UUC 7 Reference Design Note: Module requires independent power supply , supply capacity 600mA and ripple less than 100mV; Do not share power with amplifier, infrared device, camera, etc. 8 Ordering Information Part No. Description FG6221BUUC-00 RTL8821CU, 802.11a/b/g/n/ac, Wi-Fi 1T1R, BT v4.2, USB2.0, 15x13mm, dual antennae (external) FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 13 6221B-UUC 9 The Key Material List Main Inductor 0603 2.2UH,20% 850mA MPH160809S2R2MT (Sunlord) Alternative Inductor
(Microgate) 0603, 2.2UH, 20%, 850mA, MGFL1608F2R2MT-LF Diplexer DP1005-E2455FBT/LF (ACX) Main Main Crystal 2520 40MHZ 15PF, 10ppm SX25Y040000BF1T-C (TKD) Alternative Crystal 2520 40MHZ 15PF, 10ppm (TST) Alternative Crystal 2520 40MHZ 15PF, 10ppm -30+85 E 2SB40E00001AE
(HOSONIC) Alternative Crystal 2520 40MHZ 15PF, 10ppm 8Z40000022 (TXC) Main Chipset RTL8821CU-CG, QFN56 (Realtek) 10 Recommended Reflow Profile Referred to IPC/JEDEC standard. Peak Temperature : <250C Number of Times : 2 times FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 14 6221B-UUC 11 Package Information 11.1 Reel 11.2 Packaging Details The take-up package:
Using self-adhesive tape Color of plastic disc: blue FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 15 6221B-UUC NY bag size: TBD Internal box size: TBD Carton size: TBD 11.3 Moisture Sensitivity The modules is a Moisture Sensitive Level 3 device, in according with standard IPC/JEDEC J-STD-020, take care of all the requirements for this kind of components. Moreover, please pay attention to following conditions:
a) Calculated shelf life in sealed bag: 12 months at <40C and <90% RH b) Environmental condition during the production: 30C / 60% RH according to IPC/JEDEC J-STD-033A paragraph 5 c) The maximum time between the opening of the sealed bag and the reflow process must be 168 hours if condition b) IPC/JEDEC J-STD-033A paragraph 5 is respected d) Baking is required if conditions b) or c) are not respected e) Baking is required if the humidity indicator inside the bag indicates 10% RH or more FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information 16 V1.0
13410505014 wangyuanjian@qinxinsz.com 357932305@qq.com
: 2020.08.12 1 2 3 4 5 6 ETS7m x 4m x 3m 700MHz---6GHz. S11 Agilent E5071B Agilent E5071B 1. WIFI Element E1 E2 E3 Value 2. Smith 3. 2.4-2.5GHz Freq
(MHz) 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 Effi
(%) 36.65 35.79 35.46 37.56 38.27 40.45 42.16 42.71 39.54 38.78 37.68 Effi
(dB)
-4.52
-4.35
-4.67
-4.51
-3.21
-3.72
-3.75
-4.45
-4.73
-4.57
-4.34 Gain
(dBi) 2.35 2.07 2.02 2.37 2.75 2.88 2.89 2.82 2.24 2.18 2.34 3. 5.15-5.85GHz Freq
(MHz) Effi
(%) Effi
(dB) Gain
(dBi) 5150 5160 5170 5180 5190 5200 5210 5220 5230 5240 5250 5260 5270 5280 5290 5300 5310 5320 5330 5340 5350 5360 45.35 45.97 48.22 44.5 41.11 43.7 45.95 49.46 47.61 44.74 43.25 44.62 49.71 47.84 47.87 43.76 42.91 49.02 48.92 49.25 47.64 44.33
-4.52
-4.44
-4.18
-4.62
-5.07
-4.72
-4.44
-4.04
-4.25
-4.59
-4.78
-4.61
-4.01
-4.22
-4.22
-4.72
-4.83
-4.09
-4.1
-4.06
-4.24
-4.64 1.29 1.46 1.56 1.41 1.55 1.17 1.12 1.55 1.26 1.09 1.21 1.23 1.67 1.48 1.58 1.19 1.11 1.05 1.17 1.3 1.29 1.87 Freq
(MHz) Effi
(%) Effi
(dB) Gain
(dBi) Freq
(MHz) Effi
(%) Effi
(dB) Gain
(dBi) 5380 39.52 5390 40.41
-4.03
-3.93 5400 43.63
-3.6 5410 40.2 5420 41.62
-3.96
-3.81 5430 42.65
-3.7 5440 45.97 5450 44.26 5460 42.71 5470 42.11 5480 41.56 5490 47.58 5500 46.8 5510 45 5520 42.84 5530 41.39 5540 45.51 5550 48.49 5560 47.63 5570 44.93 5580 42.91 5590 44.48 5600 46.5 5610 45.52
-3.38
-3.54
-3.69
-3.76
-3.81
-3.23
-3.3
-3.47
-3.68
-3.83
-3.42
-3.14
-3.22
-3.47
-3.67
-3.52
-3.33
-3.42 1.69 1.88 2.26 1.95 2.19 2.34 2.64 2.51 2.28 2.28 2.21 2.89 2.82 2.54 2.35 2.19 2.56 2.66 2.77 2.42 2.2 2.33 2.39 2.28 5620 5630 5640 5650 5660 5670 5680 5690 5700 5710 5720 5730 5740 5750 5760 5770 5780 5790 5800 5810 5820 5830 5840 5850 43.77 42.17 43.31 46.75 48.1 46.61 43.88 42.45 44.22 47.77 49.33 46.31 41.38 40.92 44.37 46.85 45.37 39.09 34.9 37.56 41.71 45.11 37.81 32.38
-3.59
-3.75
-3.63
-3.3
-3.18
-3.31
-3.58
-3.72
-3.54
-3.21
-3.07
-3.34
-3.83
-3.88
-3.53
-3.29
-3.43
-4.08
-4.57
-4.25
-3.8
-3.46
-4.22
-4.9 2.07 1.91 2.09 2.42 2.48 2.11 1.88 1.6 1.78 2.09 2.29 1.73 1.52 1.25 1.51 1.8 1.61 0.92 0.77 0.87 1.23 1.41 0.72 0.66 FPC antenna specificati Specification. You can see antenna size is 32mm*11.3mm* From below And PCB Pad size for IPEX terminal just follow the below chart. The FPC antenna is connected to the PCB at the position of R43.R44the RF line the Line between the FPC antenna and Wifi Modulemust be 50ohm R36 R37 R40 R41 R44 R45 0 ohm 0 ohm 0 ohm 0 ohm IPEX 2 IPEX 1 FCC Statement FCC standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247,15.407 Antenna info:
External antenna Manufacture:HUNAN FN-LINK TECHNOLOGY LIMITED Model:6221B-UUC Antenna gain 2.0dBi per antenna Antenna number:2 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. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: 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:
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. We will retain control over the final installation of the modular such that compliance of the end product is assured. In such cases, an operating condition on the limit modular approval for the module must be only approved for use when installed in devices produced by a specific manufacturer. If any hardware modify or RF control software modify will be made by host manufacturer,C2PC or new certificate should be apply to get approval,if those change and modification made by host manufacturer not expressly approved by the party responsible for compliance ,then it is illegal. FCC Radiation Exposure Statement The modular can be installed or integrated in mobile or fix devices only. This modular cannot be installed in any portable device. This modular complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This modular must be installed and operated with a minimum distance of 20 cm between the radiator and user body. If the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains Transmitter Module FCC ID: 2AATL-F12ASUM13 Or Contains FCC ID: 2AATL-F12ASUM13 When the module is installed inside another device, the user manual of the host must contain below warning statements;
1. 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.
(2) This device must accept any interference received, including interference that may cause undesired operation. Note: 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:
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. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The devices must be installed and used in strict accordance with the manufacturer's instructions as described in the user documentation that comes with the product. Any company of the host device which install this modular with limit modular approval should perform the test of radiated & conducted emission and spurious emission,etc. according to FCC part 15C : 15.247 and 15.407 and 15.209
& 15.207 ,15B Class B requirement, Only if the test result comply with FCC part 15C : 15.247 and 15.407 and 15.209 &
15.207 ,15B Class B requirementthen the host can be sold legally.