SENSOR MAESTROS smB1110, smB1111 Bluetooth Low Energy BLE 4.2 Radio PCBA User Manual
- June 3, 2024
- SENSOR MAESTROS
Table of Contents
smB1110, smB1111 Bluetooth Low Energy BLE 4.2 Radio PCBA
User Manual
smB1110, smB1111 Bluetooth Low Energy BLE 4.2 Radio PCBA
Description
smB1110 BLE PCBA utilizes the Nordic nRF52810-QCAA SoC with a PCB trace
antenna. smB1111 BLE PCBA utilizes the Nordic nRF52811-QCAA SoC with a PCB
trace antenna. The nRF52811 BLE SoC is simply a slightly newer version of the
nRF52810 BLE SoC and provides the exact same radio functionality.
smB1110/smB1111 operates as a ‘Connectable-Beacon’ and transmits its beacon
information at a fixed interval that can be adjusted from 1 to 2.2 seconds and
at a Tx power of 0dBm. It can optionally be provided with a MEMs accelerometer
for simple motion detection.
For the nRF52810-QCAA and nRF52811-QCAA SoC, refers to the nRF52810/nRF52811
Product Specification and the SDK is available from the Nordic Semiconductor
website.
Main Features
- Complete Bluetooth® low energy SoC (4.2 specification)
- 32-bit ARM Cortex-M4F processor @ 64MHz
- Size : 32pin QFN 5x5x0.85mm
- Operating Frequency : 2,402MHz ~ 2,480MHz
- Up to 24kB SRAM and 192kB Flash
- Certified for FCC and Bluetooth
- Rx sensitivity : Typical -93dBm
- Operational Temperature range : -20°C to 70°C
- CR2477 primary coin cell
- Red and Green visual indicators(LED’s)
- Optional MEMs accelerometer
Applications
- Asset Tracking
- Remote Monitoring
The (Family model smB1110/smB1111) two models of Main Board share the same PCB
layout.
The only difference is the SMB1111 uses a slightly newer BLE SoC in the
nRF52811-QCAA.
- smB1110 uses the nRF52810-QCAA BLE SoC
- smB1111 uses the nRF52811-QCAA BLE SoC
Model| Item Description| Placement| Type/ Model|
anufacturer Name| Manufacturers. Part Number| Remark
---|---|---|---|---|---|---
smB1110| Bluetooth PCBA with PCB Trace Antenna| U2| nRF52810| Nordic
Semiconducto| nRF52810-QCAA| N/A
smB1111| Bluetooth PCBA with PCB Trace Antenna| U2| nRF52811| Nordic
Semiconducto| nRF52811-QCAA| N/A
Antenna Approved for use with smB1110 and smB1111
| Part Number | Max Gain (dBi) | Supplier | Notes |
|---|---|---|---|
| PCB Trace | 3.3 | PCBA Trace | Inverted F PCB Trace Antenna |
This unit is sold pre-programmed with its Radio Transmit interval, BLE UUID,
and Transmit Power defined and is encompassed into a plastic enclosure so
there is not a detailed user manual.
RADMEDIA-BLE-T21, T22 Mechanical View
NOTE: There are no accessible GPIO to a user/host outside of power and
programming pins.
RADMEDIA-BLE-T21 PCBA Photos
RADMEDIA-BLE-T22 PCBA Photos
PCB Trace
Antenna
-
Dimensions
Table 1. IFA Dimensions****
H1| 5.70 mm| W2| 0.46 mm
---|---|---|---
H2| 0.74 mm| L1| 25.58 mm
H3| 1.29 mm| L2| 16.40 mm
H4| 2.21 mm| L3| 2.18 mm
H5| 0.66 mm| L4| 4.80 mm
H6| 1.21 mm| L5| 1.00 mm
H7| 0.80 mm| L6| 1.00 mm
H8| 1.80 mm| L7| 3.20 mm
H9| 0.61 mm| L8| 0.45 mm
W1| 1.21 mm| | -
Radiation Pattern
Figure 2 shows how to relate all of the radiation patterns to the orientation of the antenna. The radiation patterns were measured with the RADMEDIA-BLE-T21 /RADMEDIA-BLE-T22 device programmed to 0-dBm output power.
Figure 2. Relating Antenna to Radiation Patterns
Figure 3. XY Plane – Vertical Polarization
Figure 4. XY Plane Horizontal
Polarization
Figure 5. XZ Plane Vertical Polarization
Figure 6. XZ Plane Horizontal
Polarization
Figure 7. YZ Plane Vertical Polarization
Figure 8. YZ Plane Horizontal
Polarization
3. PCB Antenna Bandwidth
One way of measuring the bandwidth after the antenna is implemented on a PCB
and connected to a transmitter is to write test software that steps a carrier
across the frequency band of interest. By using the maximum hold function on a
spectrum analyzer, the variation in output power across frequency can easily
be measured.
Figure 9 shows how the output power varies on the IFA when the PCB is
horizontally oriented and the receiving antenna has horizontal polarization.
This measurement was not performed in an anechoic chamber, thus the graph
shows only the relative variation for the given frequency band.
4.
Conclusion PCB Trace Antenna
Table 2 lists the most important properties for the IFA.
Table 2. Summary of IFA Properties
| Gain in XY plane | 1.1 dBi |
|---|---|
| Gain in XZ plane | 3.3 dBi |
| Gain in YZ plane | 1.6 dBi |
| Reflection | < –15 dB |
| Antenna size | 25.7 × 7.5 mm |
Federal Communication Commission Interference Statement
This equipment was 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 e quipment 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 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.
Important Note
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
a minimum distance of 20 centimeters between the radiator and your body. This
transmitter must not be co-located or operated in conjunction with any other
antenna or transmitter.
Country Code selection feature to be disabled for products marketed to the
US/CANADA.
This device is intended only for OEM integrators under the following
conditions:
- The antenna must be installed such that 20 centimeters is maintained between the antenna and users, and
- The transmitter module may not be co-located with any other transmitter or antenna,
- For all products market in US, OEM must limit the operation channels in CH0 to CH39 for 2.4G band by supplied firmware programming tool. OEM shall not supply any tool or info to the end user regarding to Regulatory Domain change.
If the conditions above are met, further transmitter test are not 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 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 is responsible
for re-evaluating the end product (including the transmitter) and obtaining a
separate FCC authorization
End Product Labeling
This transmitter module is authorized only for use in a device where the
antenna may be installed such that 20 cm may be maintained between the antenna
and users. The final end product must be labeled in a visible area with the
following: “Contains Transmitter Module FCC ID: 2A7JO-SMB1110”
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.
Sensor Maestros
Requirement per KDB996369 D03
List of applicable FCC rules
List the FCC rules that are applicable to the modular transmitter. These are
the rules that specifically establish the bands of operation, the power,
spurious emissions, and operating fundamental frequencies.
DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B)
since that is not a condition of a module grant that is extended to a host
manufacturer. See also Section 2.10 below concerning the need to notify host
manufacturers that further testing is required.3
Explanation: This module meets the requirements of FCC part 15C(15.247).it
specifically establish the 6dB Bandwidth, Peak Output Power, Radiated Spurious
Emission, Power Spectral Density, Restricted Band of Operation and Band Edge
(Out of Band Emissions) a n d Measurement.
Summarize the specific operational use conditions
Describe use conditions that are applicable to the modular transmitter,
including for example any limits on antennas, etc. For example, if point-to-
point antennas are used that require reduction in power or compensation for
cable loss, then this information must be in the instructions. If the use
condition limitations extend to professional users, then instructions must
state that this information also extends to the host manufacturer’s
instruction manual. In addition, certain information may also be needed, such
as peak gain per frequency band and minimum gain, specifically for master
devices in 5 GHz DFS bands.
Explanation: The EUT has a PCB Trace antenna. Yes, the module contains a
permanently attached Antenna. The antenna max gain is 3.3dB.
Limited module procedures
If a modular transmitter is approved as a “limited module,” then the module
manufacturer is responsible for approving the host environment that the
limited module is used with. The manufacturer of a limited module must
describe, both in the filing and in the installation instructions, the
alternative means that the limited module manufacturer uses to verify that
the host meets the necessary requirements to satisfy the module limiting
conditions.
A limited module manufacturer has the flexibility to define its alternative
method to address the conditions that limit the initial approval, such as:
shielding, minimum signaling amplitude, buffered modulation/data inputs, or
power supply regulation. The alternative method could include that the limited
module manufacturer reviews detailed test data or host designs prior to
giving the host manufacturer approval.
This limited module procedure is also applicable for RF exposure evaluation
when it is necessary to demonstrate compliance in a specific host. The module
manufacturer must state how control of the product into which the modular
transmitter will be installed will be maintained such that full compliance of
the product is always ensured. For additional hosts other than the specific
host originally granted with a limited module, a Class II permissive change is
required on the module grant to register the additional host as a specific
host also approved with the module.
Explanation: The module does not include a RF shield. The module is a
Limited Single Modular.
Trace antenna designs
For a modular transmitter with trace antenna designs, see the guidance in
Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip
Antennas and traces. The integration information shall include for the TCB
review the integration instructions for the following aspects: layout of trace
design, parts list (BOM), antenna, connectors, and isolation requirements.
a) Information that includes permitted variances (e.g., trace boundary limits,
thickness, length, width, shape(s), dielectric constant, and impedance as
applicable for each type of antenna);
b) Each design shall be considered a different type (e.g., antenna length in
multiple(s) of frequency, the wavelength, and antenna shape (traces in phase)
can affect antenna gain and must be considered);
c) The parameters shall be provided in a manner permitting host manufacturers
to design the printed circuit (PC) board layout;
d) Appropriate parts by manufacturer and specifications;
e) Test procedures for design verification; and
f) Production test procedures for ensuring compliance.
The module grantee shall provide a notice that any deviation(s) from the
defined parameters of the antenna trace, as described by the instructions,
require that the host product manufacturer must notify the module grantee
that they wish to change the antenna trace design. In this case, a Class II
permissive change application is required to be filed by the grantee, or the
host manufacturer can take responsibility through the change in FCC ID (new
application) procedure followed by a Class II permissive change application.
Explanation: Yes, the module with trace antenna designs, and this manual
includes the layout of the PCB trace design, antenna, connectors, and
isolation requirements.
RF exposure considerations
It is essential for module grantees to clearly and explicitly state the RF
exposure conditions that permit a host product manufacturer to use the module.
Two types of instructions are required for RF exposure information: (1) to
the host product manufacturer, to define the application conditions (mobile,
portable – xx cm from a person’s body); and (2) additional text needed for
the host product manufacturer to provide to end users in their end-product
manuals. If RF exposure statements and use conditions are not provided, then
the host product manufacturer is required to take responsibility of the module
through a change in FCC ID (new application).
Explanation: This module complies with FCC RF radiation exposure limits set
forth for an uncontrolled environment. This equipment should be installed and
operated with a minimum distance of 20 centimeters between the radiator and
your body. This module is designed to comply with the FCC statement, FCC ID
is: 2A7JO-SMB1110.
Antennas
A list of antennas included in the application for certification must be
provided in the instructions. For modular transmitters approved as limited
modules, all applicable professional installer instructions must be included
as part of the information to the host product manufacturer. The antenna list
shall also identify the antenna types (monopole, PIFA, dipole, etc. (note
that for example an “omni-directional antenna” is not considered to be a
specific “antenna type”)).
For situations where the host product manufacturer is responsible for an
external connector, for example with an RF pin and antenna trace design, the
integration instructions shall inform the installer that unique antenna
connector must be used on the Part 15 authorized transmitters used in the host
product.
The module manufacturers shall provide a list of acceptable unique connectors.
Explanation: The EUT has a pcb trace antenna. The module contains a
permanently attached pcb trace antenna with a max Gain of +3.3dBi.
Label and compliance information
Grantees are responsible for the continued compliance of their modules to the
FCC rules. This includes advising host product manufacturers that they need to
provide a physical or e-label stating “Contains FCC ID” with their finished
product. See Guidelines for Labeling and User Information for RF Devices – KDB
Publication 784748.
Explanation: The host system using this module, should have label in a
visible area indicated the following text: FCC ID: 2A7JO-SMB1110
Information on test modes and additional testing requirements5
Additional guidance for testing host products is given in KDB Publication
996369 D04 Module Integration Guide. Test modes should take into consideration
different operational conditions for a stand-alone modular transmitter in a
host, as well as for multiple simultaneously transmitting modules or other
transmitters in a host product.
The grantee should provide information on how to configure test modes for host
product evaluation for different operational conditions for a stand-alone
modular transmitter in a host, versus with multiple, simultaneously
transmitting modules or other transmitters in a host.
Grantees can increase the utility of their modular transmitters by providing
special means, modes, or instructions that simulates or characterizes a
connection by enabling a transmitter. This can greatly simplify a host
manufacturer’s determination that a module as installed in a host complies
with FCC requirements.
Explanation: Radiant RFID can increase the utility of our modular
transmitters by providing instructions that simulates or characterizes a
connection by enabling a transmitter.
Additional testing, Part 15 Subpart B disclaimer
The grantee should include a statement that the modular transmitter is only
FCC authorized for the specific rule parts (i.e., FCC transmitter rules)
listed on the grant, and that the host product manufacturer is responsible
for compliance to any other FCC rules that apply to the host not covered by
the modular transmitter grant of certification. If the grantee markets their
product as being Part 15 Subpart B compliant (when it also contains
unintentional-radiator digital circuity), then the grantee shall provide a
notice stating that the final host product still requires Part 15 Subpart B
compliance testing with the modular transmitter installed.
Explanation: The module without unintentional-radiator digital circuity,
so the module does not require an evaluation by FCC Part 15 Subpart B. The
host should be evaluated by the FCC Subpart B.
Revised: Novermber 30, 2022
Documents / Resources
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SENSOR MAESTROS smB1110, smB1111 Bluetooth Low Energy BLE 4.2 Radio
PCBA
[pdf] User Manual
SMB1110, 2A7JO-SMB1110, 2A7JOSMB1110, smB1110 smB1111 Bluetooth Low Energy BLE
4.2 Radio PCBA, smB1110, smB1111, Bluetooth Low Energy BLE 4.2 Radio PCBA,
Bluetooth Low Energy BLE 4.2 Radio, Radio PCBA, Radio, PCBA
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