Samsung WCA720M User manual

Version 1.0
Samsung Electronics
page 1 of 13
User manual of WCA720M
1. Introduction
WCA720M is a Wi-Fi module compliant with IEEE802.11 a.b.g.n.ac MAC/baseband/radio applications. The
core chipset is from Mediatek, part number MT7668.
2. Hardware Architecture:
2.1 Main Chipset Information
Item Vendor Part Number
IEEE802.11 a.b.g.n.ac
mac/baseband/radio Mediatek MT7668
2.2 Absolute Maximum Ratings
Symbol Parameter Rating Unit
Temp Operating -10 to 70 ℃
TSTG Storage Temperature -30 to 85 ℃

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3. Operational Description
WCA720M is the 802.11a/b/g/n/ac WIFI Module that acts as a communication controller for users of a
wireless device to connect to SMART DEVICE
- Features
> IEEE 802.11 a/b/g/n/ac
> Dual-band 2T2R Mode(2.4GHz/5GHz)
> 2X2 MIMO, 600MHz
> Support 20MHz, 40MHz, 80MHz bandwidth in 2.4GHz band 5GHz band¦
> Security support for WFA WPA/WPA2 personal, WPS2.0, WAPIP
> QoS support of WFA WMM, WMM PST
> Integrated LNA, PA, and T/R switch
> Optional external LNA and PA support.
- Time base of the RF frequency
For IF and RF frequency, a crystal(40MHz) is a clock reference.
- Synthesizer
Synthesizer inside Transceiver. Internal voltage controlled oscillator (VCO) provides the desired LO
signal base on the phase-locked loop (PLL) with a relatively wide tuning range for this application.
Internal fractional nPLL allows support for a wide range of reference clock frequencies
- WIFI Transmission
Baseband data is modulated and upconverted to the 2.4GHz ISM band, respectively.
Base-band Processing (BBP) IC has DSSS and OFDM modulation function, it provides transmission data
rate are 1, 2, 5.5, 11Mbps on DSSS and 6, 12, 18, 24, 36, 48, 54 Mbps on OFDM. Digital data signal will
be converted to analog (TX IQ) signals through DAC in BBP IC, TX IQ pass through to low pass filter. TX
I/Q signal
use direct conversion (zero-IF) architecture converter to generate carrier frequency signal. Transceiver
IC and internal PA magnify output power.
- WIFI Receiver
Reverse direction isolation of LNA inside Transceiver IC suppresses unwanted radiation. Then RF
signal will be directly down to IF signal (RX IQ) and high frequency spurious emissions are suppressed by
LPF. At last RX IQ signal will be demodulated digital data.

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- Product Details
> Data Modulation
DSSS: CCK, BPSK, QPSK for 802.11b
OFDM: BPSK, QPSK, 16QAM, 64QAM, 256QAM for 802.11a, g, n, ac
> Frequency
- 2400-2483.5 MHz
- 5150-5350MHz, 5470-5725MHz, 5725-5850MHz
This module ensures frequency stability such that an emission is maintained within the band of operation
under all conditions of normal operation

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4. Notice
CE RF Radiation Exposure Statement:
Caution This equipment complies with European 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 transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter.
Declaration of conformity
We, Samsung Electronics Co., Ltd. of
129, Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16677, Korea declare under our sole responsibility
that our product
Manufacturer: Samsung Electronics Co., Ltd.
Address: 129, Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16677, Korea
Contact Person: Hansung You / Staff Engineer
E-mail: digital[email protected]om
OPERATING FREQUENCY:
WLAN 5 GHz
(5 150 MHz
~ 5 725 MHz)
802.11a/n(HT20)
Lower-sub band
5 180 MHz ~ 5 320 MHz
Higher-sub band
5 500 MHz ~ 5 700 MHz
802.11n(HT40)
Lower-sub band
5 190 MHz ~ 5 310 MHz
Higher-sub band
5 510 MHz ~ 5 670 MHz
802.11ac(VHT80)
Lower-sub band
5 210 MHz ~ 5 290 MHz
Higher-sub band
5 530 MHz ~ 5 610 MHz
WLAN 5 GHz
(5 725 MHz
~ 5 850 MHz)
802.11a/n(HT20)
5 745 MHz ~ 5 825 MHz
802.11n(HT40)
5 755 MHz ~ 5 795 MHz
802.11ac(VHT80)
5 775 MHz
WLAN 2.4 GHz
802.11b/g/n(HT20)
2 412 MHz ~ 2 472 MHz
802.11n(HT40)
2 422 MHz ~ 2 462 MHz

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OUTPUT POWER:
WLAN 2.4 GHz
Antenna 1
17.55 dBm(802.11b)
15.59 dBm(802.11g)
15.70 dBm(802.11n_HT20)
15.49 dBm(802.11n_HT40)
Antenna 2
17.94 dBm(802.11b)
15.07 dBm(802.11g)
14.98 dBm(802.11n_HT20)
14.96 dBm(802.11n_HT40)
Multiple Antenna
18.54 dBm(802.11g)
18.55 dBm(802.11n_HT20)
18.42 dBm(802.11n_HT40)
WLAN 5 GHz
(5 150 MHz
~ 5 725 MHz)
Antenna 1
Lower-sub band
14.88 dBm(802.11a)
14.40 dBm(802.11n_HT20)
17.84 dBm(802.11n_HT40)
17.75 dBm(802.11ac_VHT80)
Higher-sub band
12.07 dBm(802.11a)
12.16 dBm(802.11n_HT20)
14.69 dBm(802.11n_HT40)
14.62 dBm(802.11ac_VHT80)
Antenna 2
Lower-sub band
14.09 dBm(802.11a)
14.35 dBm(802.11n_HT20)
16.59 dBm(802.11n_HT40)
17.78 dBm(802.11ac_VHT80)
Higher-sub band
11.40 dBm(802.11a)
11.66 dBm(802.11n_HT20)
14.54 dBm(802.11n_HT40)
15.01 dBm(802.11ac_VHT80)
Multiple Antenna
Lower-sub band
17.61 dBm(802.11a)
17.14 dBm(802.11n_HT20)
20.33 dBm(802.11n_HT40)
20.75 dBm(802.11ac_VHT80)
Higher-sub band
14.95 dBm(802.11a)
15.09 dBm(802.11n_HT20)
17.81 dBm(802.11n_HT40)
17.91 dBm(802.11ac_VHT80)
WLAN 5 GHz
(5 725 MHz
~ 5 850 MHz)
Antenna 1
9.54 dBm(802.11a)
9.25 dBm(802.11n_HT20)
9.19 dBm(802.11n_HT40)
8.73 dBm(802.11ac_VHT80)
Antenna 2
8.86 dBm(802.11a)
8.65 dBm(802.11n_HT20)
8.03 dBm(802.11n_HT40)
8.75 dBm(802.11ac_VHT80)
Multiple Antenna
11.95 dBm(802.11a)
11.70 dBm(802.11n_HT20)
11.58 dBm(802.11n_HT40)
11.65 dBm(802.11ac_VHT80)

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FCC MODULAR APPROVAL INFORMATION EXAMPLES for Manual
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.
CAUTION: 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.
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 20cm between the radiator & your body.

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OEM INTEGRATION INSTRUCTIONS:
This device is intended only for OEM integrators under the following conditions:
The module must be installed in the host equipment such that 20 cm is maintained between the antenna and
users, and the transmitter module may not be co-located with any other transmitter or antenna. The module
shall be only used with the internal on-board antenna that has been originally tested and certified with this
module. External antennas are not supported. As long as these 3 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 (for example, digital device emissions, PC peripheral
requirements, etc.). The end-product may need Verification testing, Declaration of Conformity testing, a
Permissive Class II Change or new Certification. Please involve a FCC certification specialist in order to
determine what will be exactly applicable for the end-product.
Validity of using the module certification:
In the event that these conditions cannot be met (for example certain laptop configurations or co-location
with another transmitter), then the FCC authorization for this module in combination with the host equipment
is no longer considered valid and the FCC ID of the module 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. In such cases, please involve a FCC certification
specialist in order to determine if a Permissive Class II Change or new Certification is required.
Upgrade Firmware:
The software provided for firmware upgrade will not be capable to affect any RF parameters as certified for
the FCC for this module, in order to prevent compliance issues.
End product labeling:
This transmitter module is authorized only for use in 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 FCC ID: A3LWCA720M”.
Information that must be placed in the end user manual:
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.

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FCC MODULAR APPROVAL INFORMATION EXAMPLES for Manual
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.
CAUTION: 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.
WARNING
Changes or modifications not expressly approved by the manufacturer could void the user’s authority to
operate the equipment.
“CAUTION : Exposure to Radio Frequency Radiation.
Antenna shall be mounted in such a manner to minimize the potential for human contact during normal
operation. The antenna should not be contacted during operation to avoid the possibility of exceeding the FCC
radio frequency exposure limit.

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Samsung Electronics
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IC Information
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the
following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Cet appareil est conforme avec Industrie Canada exempts de licence standard RSS (s). L'opération est soumise aux deux
conditions suivantes:
(1) cet appareil ne peut causer d'interférences, et
(2) cet appareil doit accepter toute interférence, y compris les interférences qui peuvent causer un mauvais
fonctionnement de l'appareil.
The end product must be labeled to display the Industry Canada certification number of the module.
Contains transmitter module IC: 649E-WCA720M
Le dispositif d'accueil doivent être étiquetés pour afficher le numéro de certification d'Industrie Canada du module.
Contient module émetteur IC: 649E-WCA720M
* This device is going to be operated in 5 150 MHz ~ 5 250 MHz frequency range, it is restricted in
indoor environment only.
Information for OEM Integrator
This device is intended only for OEM integrators under the following conditions:
1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and
2) The transmitter module may not be co-located with any other transmitter or antenna.
End product labelling
The label for end product must include
“Contains FCC ID: A3LWCA720M, Contains IC: 649E-WCA720M”.
“CAUTION: Exposure to Radio Frequency Radiation.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance of 20cm between the radiator and your
body. This transmitter module is authorized only for use in device where the antenna may be installed such
that 20 cm may be maintained between the antenna and users.”

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Requirement per KDB996369 D03
2.2 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). part 15E(15.407)
2.3 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 Metal Antenna, and the antenna use a permanently attached antenna which is not replaceable.
2.4 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 is not a limited module.

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2.5 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 has been shown the layout
of trace design, antenna, connectors, and isolation requirements.
2.6 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: A3LWCA720M.

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2.7 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 Metal Antenna, and the antenna use a permanently attached antenna
which is unique.
2.8 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 texts: “Contains FCC ID: A3LWCA720M, Contains IC: 649E-WCA720M”
2.9 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: Top band can increase the utility of our modular transmitters by providing instructions
that simulates or characterizes a connection by enabling a transmitter.

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2.10 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.