M2Communication MA903A1 Wireless AP Module_9 series User Manual MA903A1 FCC 20151021

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Date Submitted	2015-10-29 00:00:00
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Document Title	MA903A1 user manual_FCC_20151021
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Document Author:	arvin.cheng

MA903A1
Wireless AP Module_9 series
Feature Highlights
Low supply operation: 2.4V –
3.6V
Compact size: 35.5mm x 37.5
mm, ideal for embedded system
integration such as access point
Low-power consumption
Using M2C patented Platanus™
platform for smart-networking
application
ARM Cortex-M0 up to 32MHz
clock rate, with embedded 128
KB flash memory and 1MB
SRAM
Frequency range: 903~927MHz
Data bandwidth: up to 500kbps
High receiver sensitivity: -96dBm
at 500kbps
Integrated power amplifier up to
11dBm
Pre-matched RF front-end,
reducing design hassles
Support UART and GPIOs as
interface with other LAN modules
in the embedded system
Supports 128-node “star” and
16000-node “tree” network
infrastructure.
Applications
Comply with FCC Part 15C
Wireless sub-metering (plug)
Innovative turn-key solution
for ultra-low power wireless
link
Home automation
Remote control systems
Smart rack for logistics
system
Wireless sensor network
Telemedicine service
Wireless lighting control
Descriptions
Overview
MA903A1 is an easy-to-integrate Access Point embedded module for hosting ultra-low-power
TM
wireless-link application. With state-of-the-art Platanus protocol and networking kit, large network
(up to 16000 nodes) can be easily formed. Equipped with ISM-band RF operated at 868MHz/915MHz
bands and popular ARM 32-bit MCU along with embedded flash memory and SRAM, MA903A1 is an
ideal embedded solution for system integrator to develop wireless applications with no worry about
design hassles, both wireless and networking.
Easy to Integrate and Use
Designed as the embedded module, MA903A1 has only the board area of 35.5mm x 37.5mm,
compact enough for most embedded system design. A pre-matched 50 ohm port is ready to be used
with on-board or external antenna. The RF matched network is calibrated to optimize the RF
performance when the module is shipped, saving the design hassles for application designers.
There are total 50 stamp pads on MA903A1 with multiple digital interfaces: UART, GPIOs, and
JTAGS. This brings the design flexibility to end applications that MA903A1 is easy to interface with
other LAN modules. Through the robust wireless link, controlled/collected information from End Device
(ME10WM010) can be easily sent to the upper application layers and devices.
Copyright © by M Communcation, Inc. All rights reserved. This document is the sole and exclusive
property of M Communication, Inc. Not to be distributed or divulged without prior written agreement.
Datasheet v1.0
MA903A1
Ready-to-go Sub-GHz Radio Link with Excellent Reliability
The wireless link utilizes the sub-GHz radio band, requiring no special licenses (free-ISM) and
certification. MA903A1 comply with the ETSI EN 300 220 and FCC part 15 regulations. Compared to
the crowded 2.4GHz band, sub-GHz radio link, given the similar power level, allows better distance
and penetration especially in the hostile indoor environment. In particular, with WiFi and Bluetooth
crowding the 2.4GHz band these days, MA903A1 is immune from all 2.4GHz interference and delivers
the reliable wireless link. With the data rate of 500kbps in 2FSK, the bandwidth use efficiency is 16x
better than 2.4GHz Zigbee (2MHz). MA903A1 can deliver the link budget up to 107dBm without
adding external components. The Line-of-Sight (LOS) link distance is over 300 meters*.
* tested with 63-byte payload with PER of 1%. This may be variable depending on test environment
Robust Two-way Networking
TM
MA903A1 uses a built-in protocol Platanus to support “two-way” networking, saving the SI’s design
headache of linking large amounts of wireless nodes. Used with ME10WM010 (End Device),
MA903A1 can support two types of network hierarchies: STAR and TREE (as shown below). When
MA903A1 is configured in STAR networking, up to 128 nodes can be supported. When MA903A1 is
configured in TREE network, up to 16000 nodes can be supported. Asymmetrical downlink and uplink
are supported to balance between network reliability and response time, and the programmable
network parameters can be used to optimize for each use scenario.
Figure 1. STAR configuration
Figure2. TREE configuration
Upper Layer Connectivity
MA903A1 is shipped with the UART interface and the managing software library. Thus the upper-layer
devices, such as TCP/IP gateway, can easily access MA903A1 in the network, as the Access Point to
the private network, to exchange data “interactively” via the Ethernet or WiFi. This makes the cloudbased application developer easy to hook up with the privately-own network when building with
MA903A1.
Figure 3. Network Structure
2014/01
Copyright © by M Communication Inc.
Page 2 of 22
Datasheet v1.0
MA903A1
Ideal Platform for Low-power Application Development
MA903A1 is powered by ARM Cortex MCU with clock up to 32MHz with embedded 128K-Byte flash
TM
and 1M-Byte SRAM, to support built-in Platanus networking library from M2C and for peripherals.
For details, please refer to the associated documentation.
TM
Using Platanus protocol with M2C MA903A1 (Access Point) and/or MR1001 (Router), the formed
network can achieve ultra-low power consumption for battery-friendly applications. The network acts in
the cellular-like behavior, with sleep time configurable from 5 seconds up to 90 seconds. Details of
power consumption can be referred to the datasheet of ME10WM010.
Pin Diagram & Components Placement
Figure4. Pin diagram
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Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
Figure5. Pin diagram
2014/01
Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
Table of Contents
Electrical Characteristics ................................................................................... 6
Pin Out ................................................................................................................. 9
Memory .............................................................................................................. 10
Serial Interfaces ................................................................................................ 10
4.1
4.2
General-purpose I/O (GPIO) .................................................................................................... 10
UART ........................................................................................................................................ 10
How to Use MA903A1 to Design...................................................................... 11
5.1
5.2
5.3
5.4
50ohm RF Trace Calculation .................................................................................................... 11
PCB Design .............................................................................................................................. 12
PCB Layout Recommend ......................................................................................................... 14
PCB Layout Guide .................................................................................................................... 14
Available Antenna List ..................................................................................... 15
Regulation Approval......................................................................................... 19
Recommended PCB Footprint ......................................................................... 19
Contact Information.......................................................................................... 20
10
Ordering Information ..................................................................................... 20
2014/01
Copyright © by M Communication Inc.
Page 5 of 22
Datasheet v1.0
MA903A1
1 Electrical Characteristics
Table 1. Absolute Maximum Rating
Parameter
Symbol
Condition
Min
Supply Voltage
Vdd
VCC to GND
Voltage on I/O Pin
Temperature Range
for Storage
Operation
Temperature
Typ
Max
Unit
-0.3
3.6
Volt
VIO
-0.3
Vcc + 0.3
Volt
Tsto
-10
+85
Topt
-10
+45
Table 2. DC Characteristics
Parameter
Symbol
Condition
Min
Power Supply
Vdd
see note 1
2.4
Low-power Current
Consumption
Inormal
(see below)
N/A
Istandby
Standby mode
IRX,MB
923MHz band
Data rate = 500kbps
2FSK
30
mA
ITX1, 11dBm
Output power = 11.28dBm
50
mA
IBB
Read/Write Memory
60
mA
Itotal
System Linking, Transmit
and Receive Data
TBD
<100
mA
RX Mode Current
Consumption
TX Mode Current
Consumption
TX Mode Current
Consumption
Read/Write Memory
Linking and Data
Transmitting
Typ
Max
Unit
3.6
mA
Note 1: all performance parameters are guaranteed at Vdd = 3.3V
2014/01
Copyright © by M Communication Inc.
Page 6 of 22
Datasheet v1.0
MA903A1
Table 3. AC Characteristics
Parameter
Symbol
Condition
Min
Typ
Max
Unit
927
MHz
RF
Frequency Range
F915M
RX Sensitivity
PRx_500K
Saturation Power
Level
Psat
RSSI Range
RESRSSI
Output TX Power
Pout
dBm
RF Data Rate
DT
500
Kbps
250
Meters
110
Meters
Link Distance
Rlink
Link Distance
Rlink
2014/01
903
BER < 0.1%
2FSK, BT=0.5
500Kbps
-96
dBm
10
dBm
-82
Line-of-Sight
20-byte packet length
PER<1%
Pout = 10dBm
Line-of-Sight
20-byte packet length
PER<1%
Pout = 0dBm
Copyright © by M Communication Inc.
-58
dBm
Page 7 of 22
Datasheet v1.0
MA903A1
Table 4. Digital IO Specification
Parameter
Symbol
Rise Time
Tr
Fall Time
Tf
Logic “H”
Input Level
Logic “L”
Input Level
Input
Capacitance
Input
Impedance
Maximal Output
Current
Logic “H”
Output Level
Logic “L”
Output Level
Condition
Min
Typ
10% to 90% of VCC
CL=10pF, DR<1:0>=11
10% to 90% of VCC
CL=10pF, DR<1:0>=11
Max
Unit
10
ns
10
ns
VIH
VDD-0.6
VIL
0.6
Cpin
pF
Zpin,hiZ
DC, Configured as hi-Z
Zpin,pl
DC, Configured as pull-low
100K
Ω
Zpin,ph
DC, Configured as pull-high
100K
Ω
Idrive
programmable
10M
Ω
mA
VOH
VDD-0.5
VOL
0.5
Digital IO Specification Annotation
VOH
VIH
0.9VDD
VIL
0.1VDD
VOL
Tr
Tf
Figure6. I/O level diagram
2014/01
Copyright © by M Communication Inc.
Page 8 of 22
Datasheet v1.0
MA903A1
2 Pin Out
All VDDs are rated from 2.4V to 3.6V.
Pin #
Pin Name
Description
RFIO
RF Signal 50 ohm
IO
RF
Board ground
PWR
PWR
2~20, 22~26,
GND
32, 40, 47, 49
Type[1] I/O/PWR
Module Power Input. 2.4V~3.6V
VDD1+VDD2+VDD3+VDD_RF 150mA Requirement
Module Power Input. 2.4V~3.6V
VDD1+VDD2+VDD3+VDD_RF 150mA Requirement
21
VDD1
27
VDD2
28
UART_RXD
UART_RXD, Baud Rate = 460.8kbps
D/A
IO
29
UART_TXD
UART_TXD, Baud Rate = 460.8kbps
D/A
IO
30
IO2
GPIO
IO
31
IO1
GPIO
IO
33
JTAG_CLK
ICE CLK (debugger)
34
JTAG_DAT
ICE DATA IN (debugger)
IO
35
SYS_RESET
External reset input, No need RC Delay [2]
SYS
SYS
NC
No Connection
37
DEBUG_IO2
Debug UART_TXD, No connection
38
DEBUG_IO1
Debug UART_RXD, No connection
39
RF_TEST_IO1
RF Test Pin Data_Out, No connection
41
RF_TEST_IO2
RF Test Pin CLK_Out, No connection
42
LED2
LED Index, Driver current 3mA
IO
43
LED1
LED Index, Driver current 3mA
IO
48
VDD3
PWR
50
VDD_RF
PWR
36, 44~46
Module Power Input. 2.4V~3.6V
VDD1+VDD2+VDD3+VDD_RF 150mA Requirement
Module Power Input. 2.4V~3.6V
VDD1+VDD2+VDD3+VDD_RF 150mA Requirement
[1] D=digital, A=analog, P=power, G=ground
[2] Set this pin low reset chip to initial state, with internal pull-up
[3] External interrupt input
2014/01
Copyright © by M Communication Inc.
Page 9 of 22
Datasheet v1.0
MA903A1
3 Memory
MA903A1 is equipped with embedded 128KB flash memory and 1MB SRAM. The specification is
listed as below.
Currently MA903A1 does not support the external memory due to performance compromises,
4 Serial Interfaces
MA903A1 support the common serial data interfaces, including GPIO, and UART. Their timing and
specifications are addressed at the following sections.
4.1 General-purpose I/O (GPIO)
The functions of GPIOs are summarized as below:
Push-Pull output
Open-Drain output
Input only with high impendence (100K ~ 300Kohms)
All inputs with Schmitt trigger
I/O pin configured as interrupt source with edge/level setting
Supports input 5V tolerance
4.2 UART
Figure7. UART Data Format
The features of UART interfaces are summarized as below:
Two sets of UART controllers
The UART0 and UART1 are built-in with a 16-byte TX_FIFO and a 16-byte RX_FIFO to reduce
the number of interrupts presented to the CPU
Baud rate is up to 460800 bps
2014/01
Copyright © by M Communication Inc.
Page 10 of 22
Datasheet v1.0
MA903A1
5 How to Use MA903A1 to Design
The MA903A1 is a proprietary product design and manufactured by M2C (M Communication Inc.) for
integrated into wireless products manufactured by M2C for sub 1GHz ISM communication application.
And the chapter will complete explain how to design MA903A1 on product.
5.1 50ohm RF Trace Calculation
The MA903A1 module has 50ohm impedance RF output pin (RFIO) to connect external antenna on
carried board (or called Mother Board). RF trace on carried board is between RF output pin of
MA903A1 and antenna on carried board and the trace must is 50ohm to obtain best RF performance.
Also, 50ohm trace is recommended for PCB layout.
Engineer (or Developer) can use “PCB Transmission Line calculation tool” (example: Polar) to obtain
value about RF layout information on PCB. Engineer just fill in value that FR4relative parameter in
“PCB Transmission Line calculation tool”, include PCB stack, substrate height, PCB dielectric, trace
thickness….etc. 50ohm transmission line dimension can be got from the tool. Below figure10 show the
PCB Transmission Line calculation tool.
Fill inFR4 Parameter
Figure8. Trace design for the PCB layout
Example: Use 2-layer FR4 PCB to design 50ohm trace
The figure 11 is 2-layers FR4 PCB parameter (PCB stack). The RF trace width and spacing that is
between RF trace and ground plane and others value that is 50ohm design requires is show in figure
12.
Figure9. 2-layer FR4 PCB stack
Figure10. 50ohm parameter of 2-layers FR4
2014/01
Copyright © by M Communication Inc.
Page 11 of 22
Datasheet v1.0
MA903A1
5.2 PCB Design
MA903A1 provides 3 antennas (frequency: 902MHz~928MHz) for engineer chooses, one is PIFA type
antenna; the other two are dipole antenna. About antenna manufacturer and model number can refer
chapter 7.
When using dipole antenna on carried board, just need to make sure the impedance of RF trace is
50ohm, as below figure 11.
Figure11-1.Reversed SMA connector to connect dipole antenna
50ohm RF trace
Figure11-2.Reversed SMA connector to connect dipole antenna
When using PIFA antenna in design PCB, need to make sure the impedance of RF trace is 50ohm.
Structure of PIFA antenna can separate two parts. One is metal part that solder on PCB; the other is
antenna trace on PCB. The different antenna trace length has different center frequency. Engineer
can use network analyzer to fine-tune antenna trace length, so that antenna can work on required
frequency (902MHz~928MHz). The trace dimension in figure14 is recommended to PCB layout.
2014/01
Copyright © by M Communication Inc.
Page 12 of 22
Datasheet v1.0
MA903A1
PIFA
Figure12. PIFA antenna
Figure13. Network analyzer to check frequency & return loss
Figure14. PIFA antenna trace dimension
2014/01
Copyright © by M Communication Inc.
Page 13 of 22
Datasheet v1.0
MA903A1
5.3 PCB Layout Recommend
RF connector: Reversed SMA connector.
RF trace length is less 80mm.
5.4 PCB Layout Guide
Some general rules of thumb for designing RF-related layouts for good RF performance are:
Use as much continuous ground plane metallization as possible.
Avoid the separation of the ground plane metallization at RF area.
Use as many grounding vias (especially near to the GND pins) as possible to minimize series
parasitic inductance between the ground pour and the GND pins.
Use a series of GND vias (a so called “via curtain”) along the PCB edges and internal GND metal
pouring edges. The maximum distance between the vias should be less than lambda/10 of the
10th harmonic. This is required to reduce the PCB radiation at higher harmonics caused by the
fringing field of these edges.
Avoid using long and/or thin transmission lines to connect the components. Otherwise, due to its
distributed parasitic inductance some detuning effects can occur.
Avoid using loops and long wires to obviate its resonances.
Always ensure good VDD filtering by using some bypass capacitors (especially at the range of
the operating frequency).
2014/01
Copyright © by M Communication Inc.
Page 14 of 22
Datasheet v1.0
MA903A1
6 Available Antenna List
The MA903A1 RF module has 50ohm RF output pin (RFIO) to connect external 902MHz~928MHz
antenna. The choice of antenna is limited to the antenna types the module has been tested with. Refer
to Section 8 “Regulation Approval” for a list of tested and approved antenna types that may be used
with the MA903A1 module.
A list of antenna approved for use with the module is provided as below table.
Antenna Type
Peak Gain
Model No.
Manufacturer
PIFA
0.3dBi
AN14-000079
RESILIENT
Dipole
1.42dBi
CWX-614XSAXX-999
JOYMAX
Dipole
2dBi
GWX-282XSABX-991
JOYMAX
Below antenna’s pattern are measured and provide by vender.
PIFA / AN14-000079
X-Y Plane
2014/01
Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
Y-Z Plane
X-Z Plane
2014/01
Copyright © by M Communication Inc.
Page 16 of 22
Datasheet v1.0
MA903A1
Dipole / CWX-614XSAXX-999
2014/01
Copyright © by M Communication Inc.
Page 17 of 22
Datasheet v1.0
MA903A1
Dipole / GWX-282XSABX-991
2014/01
Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
7 Regulation Approval
The MA903A1 module has received regulatory approvals for modular device in the United Stated.
Modular approval allows the end user to place the MA903A1 module inside a finish product and not
require regulatory testing for an intentional radiator (RF transmitter), provided no changes or
modifications are made to the module circuity. Changes or modifications could void the user’s
authority to operate the equipment. The end user must comply with all of the instructions provided by
the grantee, which indicate installation and/or operating conditions necessary for compliance.
The MA903A1 has received Federal Communications Commission (FCC) CFR47
Telecommunications, Part 15 Subpart C “Intentional Radiators” 15.247 and modular approval in
accordance with Part 15.212 modular Transmitter approval. The MA903A1 module can be integrated
into a finished product without obtaining subsequent and separate FCC approvals for intentional
radiation.
The MA903A1 module has been labeled with its own FCC ID number and if the FCC ID is not visible
when the module is installed inside another device, then the outside of the finished product into which
the module is installed must also display a label referring to the enclosed module. This exterior label
can use wording as follows:
Contain Transmitter module FCC ID : 2AFXU-MA903A1
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.
8 Recommended PCB Footprint
Figure15.Top View Outline Dimension
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Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
Figure16.Recommend PCB Footprint
9 Contact Information
M2Communication Inc. (M2Comm)
4-3F, No.32, Gaotie 2nd Rd.,
Zhubei, Hsinchu County, Taiwan.
Tel: +886-3-657-8939
Fax: +886-3-657-6909
Email: sales@m2comm.com
www.m2comm-semi.com
10 Ordering Information
Ordering
Part Number
MA903A1
Frequency
Band
903~927MHz
Product
Description
MA903A1 with 50-ohm output for external antenna
This document contains confidential information and is subject to the terms and conditions set forth in the Non2
Disclosure Agreement between the Recipient Entity and M Communication, Inc. (M2C) The information in this
document is believed to be accurate in all respects at the time of publication but is subject to change without
notice. M Communication, Inc. assumes no responsibility for errors and omissions, and disclaims responsibility for
any consequences resulting from the use of information included herein. Additionally, M Communication, Inc.
assumes no responsibility for the functioning of un-described features or parameters. M Communication, Inc.
reserves the right to make changes without further notice. M Communication, Inc. makes no warranty,
representation or guarantee regarding the suitability of its products for any particular purpose, nor does
M Communication, Inc. assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages.
M Communication, Inc. products are not designed, intended, or authorized for use in applications intended to
support or sustain life, or for any other application in which the failure of the M Communication, Inc. product could
create a situation where personal injury or death may occur. Should Buyer purchase or use M Communication,
Inc. products for any such unintended or unauthorized application, Buyer shall indemnify and hold
M Communication, Inc. harmless against all claims and damages.
2014/01
Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
FCC Statement:
Federal Communication Commission Interference Statement
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 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 device and its antenna(s) must not be co-located with any other transmitters except in
accordance with FCC multi-transmitter product procedures.
Referring to the multi-transmitter policy, multiple-transmitter(s) and module(s) can be
operated simultaneously without C2P.
IMPORTANT NOTE:
FCC 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 20 cm between the radiator &
your body.
IMPORTANT NOTE:
This module is intended for OEM integrator. The OEM integrator is responsible for
the compliance to all the rules that apply to the product into which this certified RF
module is integrated.
Additional testing and certification may be necessary when multiple modules are used.
20 cm minimum distance has to be able to be maintained between the antenna and the users for the
host this module is integrated into. Under such configuration, the FCC radiation exposure limits set
forth for an population/uncontrolled environment can be satisfied.
Any changes or modifications not expressly approved by the manufacturer could void the user's
authority to operate this equipment.
USERS MANUAL OF THE END PRODUCT:
In the users manual of the end product, the end user has to be informed to keep at least 20 cm
separation with the antenna while this end product is installed and operated. The end user has to be
informed that the FCC radio-frequency exposure guidelines for an uncontrolled environment can be
satisfied. The end user has to also be informed that any changes or modifications not expressly
approved by the manufacturer could void the user's authority to operate this equipment. If the size of
the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is required to be
available in the users manual: This device complies with Part 15 of FCC rules. Operation is subject to
2014/01
Copyright © by M Communication Inc.
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Datasheet v1.0
MA903A1
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.
LABEL OF THE END PRODUCT:
The final end product must be labeled in a visible area with the following " Contains TX FCC ID:
2AFXU-MA903A1 ". If the size of the end product is larger than 8x10cm, then the following FCC part
15.19 statement has to also be available on the label: This device complies with Part 15 of 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.
2014/01
Copyright © by M Communication Inc.
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