REALTEK RTL8851B Blood Pressure Wrist Watch Smart Mobile User Manual
- June 15, 2024
- Realtek
Table of Contents
RTL8851B
11ax RTL8851BE one antenna Combo module
User’s Manual
Preliminary Version
2022/12/20
Temperature
Temperature Limit Ratings
Table 12. Temperature Limit Ratings
| Parameter | Minimum | Maximum | Unity |
|---|---|---|---|
| Storage Temperature | -55 | +125 | °C |
| Ambient Operating Temperature | -10 | 70 | °C |
| Junction Temperature | 0 | 125 | °C |
Humidity Information
| MSL level | 3 |
|---|
Warning
Federal Communication Commission Interference Statement
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 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.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this
equipment.
This device and its antenna(s) must not be co-located with any other
transmitters except in accordance with FCC multi-transmitter product
procedures.
Operations in the 5.15-5.25GHz band are restricted to indoor usage only. FCC
regulations restrict the frequency 5850-5895MHz operation of this device to
indoor use only.
This device meets all the other requirements specified in Part 15E, Section
15.407 of the FCC Rules.
Radiation Exposure Statement:
This equipment 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.
This module is intended for OEM integrators only. Per FCC KDB 996369 D03 OEM
Manual v01 guidance, the following conditions must be strictly followed when
using this certified module:
KDB 996369 D03 OEM Manual v01 rule sections:
2.2 List of applicable FCC rules
This module has been tested for compliance to FCC Part 15
2.3 Summarize the specific operational use conditions
The module is tested for standalone mobile RF exposure use condition. Any
other usage conditions such as co-location with other transmitter(s) or being
used in a portable condition will need a separate reassessment through a class
II permissive change application or new certification.
2.4 Limited module procedures
Not applicable.
2.5 Trace antenna designs
Not applicable.
2.6 RF exposure considerations
This equipment complies with FCC mobile radiation exposure limits set forth
for an uncontrolled environment. This equipment should be installed and
operated with a minimum distance of 20cm between the radiator & your body. If
the module is installed in a portable host, a separate SAR evaluation is
required to confirm compliance with relevant FCC portable RF exposure rules.
2.7 Antennas
The following antennas have been certified for use with this module; antennas
of the same type with equal or lower gain may also be used with this module.
The antenna must be installed such that 20 cm can be maintained between the
antenna and users.
Antenna NO.| RF Chain NO.| Brand| Model| Antenna Net Gain(dBi)| Frequency
range| Antenna Type| Connector
Type| Cable Length
(mm)
---|---|---|---|---|---|---|---|---
1| Chain 1| REALTEK| RTK-ANT-0022| 3.4| 2.4∼2.4835GHz| PIFA| IPEX4| 300
5| 5.15∼5.895GHz
2| Chain 1| Aristotle| RFA-27-C38H1- MHF4300| 3| 2.4∼2.4835GHz| Dipole| IPEX4|
300
5| 5.15∼5.895GHz
3| Chain 1| LYNwave| ALX22F-120AA0- 00| 3.2| 2.4∼2.4835GHz| Monopole| IPEX4|
200
4| 5.15∼5.895GHz
2.8 Label and compliance information
The final end product must be labeled in a visible area with the following:
“Contains FCC ID: TX2-RTL8851B”. The grantee’s FCC ID can be used only when
all FCC compliance requirements are met.
2.9 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) or
portable use will require a separate class II permissive change re-evaluation
or new certification.
2.10 Additional testing, Part 15 Subpart B disclaimer
This transmitter module is tested as a subsystem and its certification does
not cover the FCC Part 15 Subpart B (unintentional radiator) rule requirement
applicable to the final host. The final host will still need to be reassessed
for compliance to this portion of rule 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
module installed.
IMPORTANT NOTE: In the event that these conditions can not 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 can_ not 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.
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 user’s manual of the
end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual.
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 EMF essential requirements of the FCC
rules. This module must not be incorporated into any other device or system
without retesting for compliance as multi-radio and combined equipment
Industry Canada statement:
This device complies with ISED’s licence-exempt RSSs. 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.
Radiation Exposure Statement:
This equipment complies with ISED radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
greater than 20cm between the radiator & your body.
This device is intended only for OEM integrators under the following
conditions: (For module device use)
- The antenna must be installed and operated with greater than 20cm between the antenna and users, and
- The transmitter module may not be co-located with any other transmitter or antenna.
As long as 2 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
module installed.
IMPORTANT NOTE:
In the event that these conditions can not be met (for example certain laptop
configurations or co-location with another transmitter), then the Canada
authorization is no longer considered valid and the IC ID can not 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 Canada authorization.
End Product Labeling
This transmitter module is authorized only for use in device where the antenna
may be installed and operated with greater than 20cm between the antenna and
users. The final end product must be labeled in a visible area with the
following: “Contains IC: 6317A-RTL8851B”.
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 user’s manual of the
end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual.
Caution:
(i) the device for operation in the band 5150-5250 MHz is only for indoor use
to reduce the potential for harmful interference to co-channel mobile
satellite systems;
(ii) for devices with detachable antenna(s), the maximum antenna gain
permitted for devices in the bands 5250-5350 MHz and 5470-5725 MHz shall be
such that the equipment still complies with the e.i.r.p. limit;
(iii) for devices with detachable antenna(s), the maximum antenna gain
permitted for devices in the band 5725-5850 MHz shall be such that the
equipment still complies with the e.i.r.p. limits as appropriate;
(iv) where applicable, antenna type(s), antenna models(s), and worst-case tilt
angle(s) necessary to remain compliant with the e.i.r.p. elevation mask
requirement set forth in section 6.2.2.3 shall be clearly indicated.
This radio transmitter [IC: 6317A-RTL8851B] has been approved by Innovation,
Science and Economic Development Canada to operate with the antenna types
listed below, with the maximum permissible gain indicated. Antenna types not
included in this list that have a gain greater than the maximum gain indicated
for any type listed are strictly prohibited for use with this device.
Antenna NO.| RF Chain NO.| Brand| Model| Antenna Net Gain(dBi)| Frequency
range| Antenna Type| Connector
Type| Cable Length
(mm)
---|---|---|---|---|---|---|---|---
1| Chain 1| REALTEK| RTK-ANT-0022| 3.4| 2.4∼2.4835GHz| PIFA| IPEX4| 300
5| 5.15∼5.85GHz
2| Chain 1| Aristotle| RFA-27-C38H1- MHF4300| 3| 2.4∼2.4835GHz| Dipole| IPEX4|
300
5| 5.15∼5.85GHz
3| Chain 1| LYNwave| ALX22F-120AA0- 00| 3.2| 2.4∼2.4835GHz| Monopole| IPEX4|
200
4| 5.15∼5.85GHz
NCC Statement
Antenna NO.| RF Chain NO.| Brand| Model| Antenna Net Gain(dBi)| Frequency
range| Antenna Type| Connector
Type| Cable Length
(mm)
---|---|---|---|---|---|---|---|---
1| Chain 1| REALTEK| RTK-ANT-0022| 3.4| 2.4∼2.4835GHz| PIFA| IPEX4| 300
5| 5.15∼5.85GHz
2| Chain 1| Aristotle| RFA-27-C38H1- MHF4300| 3| 2.4∼2.4835GHz| Dipole| IPEX4|
300
5| 5.15∼5.85GHz
3| Chain 1| LYNwave| ALX22F-120AA0- 00| 3.2| 2.4∼2.4835GHz| Monopole| IPEX4|
200
4| 5.15∼5.85GHz
Installing the Wireless NGFF module Hardware
Installing PCle NGFF2230 module to PCle NGFF2230 connector and connect two
external Wi-Fi antennas on I-PEX connectors.
Un-installing the Wireless NGFF module Hardware
Remove 2 external Wi-Fi Antennas from the Wireless PCle NGFF2230 module board
and remove the Wireless PCle NGFF2230 module board from PCle NGFF2230
connector port
Installing the WLAN &
Bluetooth USB NGFF module
Software
Before you proceed with the installation, please notice following
descriptions.
Note1: The following installation was operated under Windows 7.
Note2: If you have installed the WLAN driver & utility before, please
uninstall the old version first.
A. Execute the “setup.exe”, Click “Next” to process the installation 
B. Select “I accept the
terms in license agreement” and click “Next” to process the installation
C. Click “Next”
button.
D. Select “Complete” and
click “Next” button. 
E. Click “Install”
button.
F. Click “Finish” button.
G. Please click “T —25″to
continue.
H. Please click “T —25″to
continue. 
I. Please click “%%%”to
start installation.J. Please click “5¢f%”to
finish the installation.
Un-installing
the Wireless NGFF module Software
A. Uninstall the RTL8852BE WLAN Driver from “Start’→ “Control Panel”→ “Programs”
Please select items as below and click “Uninstall” to remove RTL8852BE WLAN, BT driver and MP UlI.
Fesex semiconductor Gor.
No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.: +886-3-578-0211. Fax: +886-3-577-6047
www.realtek.com
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