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Wireless Product Testing William H. Graff, AmericanTCB

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William H. Graff, AmericanTCB FCC 47 CFR Regulations Part 2 General Requirements Part 15B Unintentional Radiators Part 15C/D/E/F Intentional Radiators Part 18 ISM ... – PowerPoint PPT presentation

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Title: Wireless Product Testing William H. Graff, AmericanTCB


1
Wireless Product TestingWilliam H. Graff,
AmericanTCB
2
FCC 47 CFR Regulations
  • Part 2 General Requirements
  • Part 15B Unintentional Radiators
  • Part 15C/D/E/F Intentional Radiators
  • Part 18 ISM Devices
  • All Other Rule Parts Licensed Devices

3
Part 2 General Requirements
  • Basic reference section on how to create an FCC
    filing.
  • Oldest part of the FCC rules.
  • All necessary requirements begin with Part 2
  • FCC Rules predate industry standards

4
Equipment Authorizations
  • There are three basic types of equipment
    authorizations
  • Verification
  • Declaration of Conformity
  • Certification

5
Verification
  • Simplest of all Equipment Authorizations
  • No submission to FCC
  • Data is held by Applicant/Manufacturer
  • Proof that equipment was tested and found to be
    compliant at a given point in time
  • Examples Broadcast Receivers, TVs, Class A
    Digital Devices, BPL (consumer)

6
Declaration of Conformity
  • More complex than Verification
  • No submission to FCC
  • Must be done at an Accredited Laboratory
  • Country where testing takes place must have
    signed MRA with USA
  • Responsible Party must reside on US soil
  • Examples Class B computers and peripherals,
    microwave ovens for consumers,

7
Certification
  • Used for all equipment authorizations involving
    Licensed or Unlicensed transmitters.
  • Can be used optionally for Class B
    computers/peripherals, comsumer microwave ovens,
    etc.
  • Submission to FCC database is mandatory
  • Is more than just an engineering report. It is
    a legal document.
  • Requires a detailed list of Exhibits (See
    2.1033)
  • Examples All Licensed transmitters, all
    Unlicensed Part 15 Intentional Radiators, radar
    detectors, scanning receivers

8
Changes to Certified Equipment
  • Known as Permissive Change
  • Changes which have no effect on RF emissions or
    performance Class 1
  • Changes which affect emissions or performance but
    still within the limits Class 2
  • Changes to RF software Class 3 This is only
    applicable to devices which qualify as Software
    Defined Radio (SDR)

9
Class I Permissive Change
  • Changes which have no effect on the emission
    characteristics of a device
  • No submission to FCC
  • Test Report is created, but held by Applicant /
    Manufacturer
  • Examples Color

10
Class II Permissive Change
  • Changes which may potentially affect the
    emissions of a device
  • Submission required to FCC
  • Examples New PCB layout, new antenna, new host
    (re modular approval)

11
Forbidden Class II Changes(requires new ID / new
submission)
  • Changes to frequency determining circuit
  • Changes in RF power
  • Changes from one RF category to another
  • Changes to modulation or timing
  • Changes in basic functionality (i.e. dual band to
    single band)

12
Permit-But-Ask ProcedureNew! as of November,
2006
  • FCC has initiated a new procedure for
    troublesome filings and new technology. Prior
    to any request for Certification, a TCB must
    request guidance from FCC on specific items to
    look for before granting Certification.
  • Specifically aimed (so far) at 15.239 personal FM
    transmitters, WiMax devices and 3.5/4G
    cellphones.
  • See FCC Memo to TCBs.

13
Licensed Transmitter Approvals
14
Licensed Radio Services General Testing
Requirements
  • FCC Part 2.1046 through 2.1057 Cover tests for
    all licensed devices.
  • The basics rationale of all FCC tests originate
    within this section. This is the oldest of the
    FCC rules
  • Built for the narrowband world, but still
    adaptable to broadband radio concepts

15
Licensed Radio Services Test Parameters
  • 2.1046 - Power Output
  • 2.1047 - Modulation Characteristics
  • 2.1049 - Occupied Bandwidth
  • 2.1051 - Antenna Terminal Spurious Emissions
  • 2.1053 - Radiated Spurious Emissions
  • 2.1055 - Frequency Stability for Temperature and
    Voltage Variations

16
Licensed Radio Services Test Parameters
  • Remember that the purpose of performing the
    measurements required and submitting
    interpretations is to establish compliance with
    the technical requirement contained in the Radio
    Service Rules. These rules are pre-standards.
    In other words they evolved before there were
    generally accepted measurement standards and
    practices.

17
Basic Test Parameters
  • Power Output 2.1046
  • Traditionally thought of as a caloric
    measurement. Use of common CW power meters were
    common. Great deal of measurement certainty.
  • Part 15 began the usage of peak reading power
    meters. Most unlicensed transmitter sections
    still require the concept of peak power unless
    specifically stated otherwise

18
Basic Test Parameters
  • Modulation Characteristics 2.1047
  • For analog radio transmissions (AM, FM, SSB)
    understanding basic parameters such as audio
    response and audio low pass filter were necessary
    to determine compliance. Testing usually required
  • For todays constant envelope digital
    modulation systems this is basically unnecessary,
    but still must be described. Testing usually not
    required.

19
Basic Test Parameters
  • Occupied Bandwidth 2.1049
  • Occupied Bandwidth is defined as that portion of
    the spectrum where 99 of the emitted energy
    exists. The results are used to compare modulated
    spectrum with emissions masks.
  • Although not explicitly specified, all
    Certification reports including Part 15 must have
    an occupied bandwidth plot
  • Plot should be presented for each type of
    modulation

20
Basic Test Parameters
  • Antenna Terminal Spurious Emissions 2.1051
  • (Also known as Antenna Conducted Emissions)
  • View levels of conducted harmonics applied to the
    antenna.
  • An extension of the occupied bandwidth test. Show
    spurious emissions to 10th harmonic.
  • Unless specified elsewhere, RBW should be equal
    or greater than Tx emission bandwidth

0
21
Basic Test Parameters
  • Field Strength of Spurious Emissions 2.1053
  • Test includes emissions radiated from the
    cabinet, chassis, and associated wiring. The
    specification is the same emission mask under the
    Radio Service rules extended to the highest
    frequency specified in 2.1057. Traditionally a
    terminated transmitter is tested without
    antenna.
  • For Licensed equipment, the substitution method
    described in TIA/EIA 603 is the required test
    procedure.
  • For Part 15 emissions testing, direct measurement
    of field strength is accepted. Device must be
    tested with its antenna in place.

22
Basic Test Parameters
  • Frequency Stability 2.1055
  • Done over temperature -30 C to 50 C and
    operating voltage /- 15 specifications.
  • Battery operated devices should also include
    B.E.P Battery End Point
  • Usually defined in ppm but other units such as
    Hz, are accepted as defined in specific rule
    section.
  • In most cases, frequency stability is not
    required for Part 15

23
Certification Checklist Check for Accuracy
  • Applicant name, address, contact info, email
    address. There must be agreement with the
    supplied contact information and the Grantee
    contact information at FCC website.
  • Agent Authorization Letter
  • Confidentiality Request Letter
  • FCC ID
  • Equipment Class if not known ask!
  • Rule Part(s)
  • Frequency Range
  • Power Output
  • Requested Emission Designator

24
Certification Checklist
  • Associated Application (Composite Request)
  • Confidentiality Request (See separate details for
    STC)
  • Details to be included with confidentiality.
  • Block Diagram
  • Schematics
  • Operational Description
  • Parts/Tune Up
  • Statement / letter supplied for special
    requirements or interagency coordination (if
    required).

25
Licensed and Unlicensed Transmitter Exhibits
  • Certification Requirements for exhibits,
    labeling, etc, differ somewhat from the Licensed
    world.
  • Compare 2.1033(c) Licensed Tx with 2.1033(b)
    Part 15 for Exhibit list
  • Compare 15.19(a)(3) with 15.19(a)(1) for label
    language. Devices which are Licensed transmitters
    only with no accociated receiver can omit all
    15.19 langrage
  • All Part 15 devices must address 15.21 and 15.105
    for manual
  • RF Exposure language is additional

26
Unlicensed Part 15 Transmitter Approvals
27
Part 15 Rule Organization
  • All general rules including measurement
    procedures, label requirements, etc. are located
    in 15.xx (Subpart A)
  • All Unintentional Radiators are located in Part
    15.1xx of the Rules (Subpart B)
  • All Intentional Radiators are located in the
    15.2xx sections of the Rules (Subpart C), 15D
    (unlicensed PCS), 15E (UNII) and 15F (UWB)

28
Essential Part 15 Transmitter Requirements
  • 15.203 Antenna Requirements
  • 15.204 External amplifier restrictions
  • 15.205 Restricted Bands
  • 15.207 Conducted Requirements
  • 15.209 Radiated Requirements

29
15 C Intentional Radiators
  • Special note FCC 15.207 FCC 15.209
  • Equivalent to 15.107 and 15.209 Class B computer
    limits.
  • Unless indicated otherwise, all spurious
    emissions from Part 15 transmitters should be to
    these limits.

30
15.203 Antenna Requirements
  • An intentional radiator shall be designed to
    ensure that no antenna other than that furnished
    by the responsible party shall be used with the
    device.

31
15.204 Power Amp Restrictions
  • Officially referred to as a Transmission System
  • For spread spectrum transmitters usually includes
    the bi-directional amplifier, DC injector, and
    spread spectrum transceiver under one FCC ID
  • Amplifiers designed for use with Spread Spectrum
    Systems must be approved as part of the system
    and marketed as part of a complete package.
    Amplifiers cannot be marketed without pairing to
    specific transceiver.
  • Only approved antennas may be sold with the
    product. New antenna can be added under the Class
    II PC process.

32
15.205 Restricted Bands
  • Bands are generally US Government and military
  • The field strength of emissions appearing within
    these frequency bands shall not exceed the limits
    shown in 15.209.
  • Basis for all radiated band edge requirements.
  • Caution Restricted Bands change over time

33
AC Conducted Limits 15.207
  • Except for battery-only powered devices, all Part
    15 transmitters must have AC Conducted test. This
    includes Modular Approvals under DA 00-1407
  • Conducted emissions not required for battery
    powered devices that make no provisions for
    attachment to AC power.
  • Follow test procedure in ANSI C63.4
  • Unless otherwise specified, all Intentional
    Radiators must meet 15.207 limits.

34
Radiated Emission Limits 15.209
  • Unless specified elsewhere, all Intentional
    Radiators must meet 15.209 limits anywhere
    outside of their allotted frequency band.
  • Test set-up per ANSI C 63.4 limits.
  • Limits identical to FCC Class B. Tighter limits
    apply at all band edges
  • Watch for specific rules for the device.
  • Intentional radiators must generally be measured
  • to the 10th Harmonic

35
Part 15 C Intentional Radiators
  • 15.215 Additional Provisions to the General
    Radiated Emission Limitations
  • Prolog to 15.217 to 15.255
  • 15.215(b) Emissions outside parking space must
    meet Class B limits.
  • 15.215(c) Emissions should stay within central
    80 of band.
  • 15.215(d) Emissions must take into account
    sweeping, hopping and other modulation techniques
    including OOK

36
Part 15 C Intentional Radiators
  • 15.217 Operation in the band 160-190 kHz.
  • 15.219 Operation in the band 510-1705 kHz
  • 15.221 Operation in the band 525-1705 kHz.
  • 15.223 Operation in the band 1.705-10 MHz.
  • 15.225 Operation within the band 13.110-14.010
    MHz.
  • 15.227 Operation within the band 26.96-27.28
    MHz.
  • 15.229 Operation within the band 40.66-40.70
    MHz.
  • 15.231 Periodic operation 40.66-40.70 MHz and
    above 70 MHz.
  • 15.233 Operation within the bands 43.71-44.49
    MHz, 46.60-46.98 MHz, 48.75-49.51 MHz and
    49.66-50.0 MHz.
  • 15.235 Operation within the band 49.82-49.90
    MHz.
  • 15.237 Operation in the bands 72.0-73.0 MHz,
    74.6-74.8 MHz and 75.2-76.0 MHz.
  • 15.239 Operation in the band 88-108 MHz.
  • 15.240 Operation in the band 433.5-434.5 MHz.
  • 15.241 Operation in the band 174-216 MHz.
  • 15.242 Operation in the bands 174-216 MHz and
    470-668 MHz.
  • 15.243 Operation in the band 890-940 MHz.
  • 15.245 Operation within the bands 902-928 MHz,
    2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz,
    and 24075-24175 MHz.
  • 15.247 Operation within the bands 902-928 MHz,
    2400-2483.5 MHz, and 5725-5850 MHz.
  • 15.249 Operation within the bands 902-928 MHz,
    2400-2483.5 MHz, 5725-5875 MHZ, and 24.0-24.25
    GHz.

37
Part 15 Most Common Sections
  • 15.227 27MHz Toys
  • 15.231 Momentary-On Remote Controls
  • 15.235 49MHz Toys
  • 15.239 88 - 108 MHz Personal FM Transmitters
  • 15.247 Spread Spectrum Transmitters
  • 15.407 UNII Devices

38
Part 15D - Unlicensed PCS Bands
  • 1910 - 1930 MHz
  • 2390 - 2400 MHz
  • Unique Antenna Connector Required
  • 3 dBi Max (1 to 1 Power Reductions vs. antenna
    gain)
  • OK for TCB approval
  • Rarely used FCC section. But more activity this
    past year as this section has recently been
    re-written
  • Still very complicated.

39
Part 15E - UNIIUnlicensed National Information
Infrastructure
  • 5.15 - 5.25 GHz
  • 5.25 - 5.35 GHz
  • 5.47 - 5.725
  • 5.725 - 5.825 GHz
  • 802.11a transmitters
  • Specific power and usage limitations for each
    band
  • Indoor use only in the 5.25 - 5.35 GHz band.
  • DFS compliance required filing to FCC
  • Also shared with 15.247

40
Part 15 F UWB (Ultra-Wide Band)
  • Adopted in April of 2002
  • Does not yet qualify for TCB Approval
  • No standardized test procedures yet adopted
  • Devices range from see-through-wall devices,
    ground radar for construction and safety, to low
    power communication.
  • Operates over wide area of band (1 to 3 GHz wide
    signals)

41
Spread Spectrum DevicesDTS/DSSS and FHSS(WiFi
and Bluetooth)
42
Spread Spectrum Definitions
  • Direct Sequence and DTS - use a sequential
    modulation to spread a narrow signal over a
    relative broad band.
  • Example 802.11b/g
  • Frequency Hopper - uses an encoded narrow band
    signal that shifts in a pseudorandmly generated
    frequency shifts.
  • Example Bluetooth
  • Hybrid a combination of both Frequency Hopping
    and Direct Sequence systems

43
Spread Spectrum Frequencies
  • Operate in the Industrial, Scientific, and
    Medical bands on a secondary basis.
  • ISM bands are global and not restricted by ITU
    regions
  • No protection from interference
  • 902 - 928 MHz
  • 2400 - 2483.5 MHz
  • 5725 - 5850 MHz

44
WiFi 802.11b/g channels
  • FCC rule interpretations do not allow the end
    user to select the country or region, nor do they
    allow the end user to download International
    driver channel sets. The only legal channels are
    Channel 1 (2412MHz) to Channel 11 (2462 MHz)

45
FCC Rules for Spread Spectrum Transmitters
  • Power Output 1 Watt Max (except for specific
    cases)
  • EIRP 4 Watts Max (except Point to Point)
  • Antenna Gain limited to 6 dBi without power
    reduction from transmitter of 1 dB power for
    every 1 dB antenna exceeds 6 dBi
  • Unique antenna connector required (except under
    professional installation)

46
Additional FCC Requirements
  • For systems operating strictly as a Point to
    Point systems
  • in the 2400 - 2483.5 MHz band, the power
    reduction requirement is 1 dB for every 3 dB the
    antenna exceeds 6 dBi
  • in the 5725 - 5850 MHz band may employ antennas
    with directional gain greater than 6 dBi without
    reduction in transmitter output power.

47
Additional Requirements
  • Must Operate on Non-Interference Basis (cannot
    interfere with others)
  • Must accept that interference may affect
    operation no legal recourse
  • Out of Band requirements including being 20 dBc
    down in any 100 kHz outside the Band of Operation
    (In reality, 75 dBc down from peak in the
    Restricted Bands is probably necessary)

48
Spread Spectrum Testing
  • Radio testing typically performed in several
    parts
  • Lab bench testing for all conducted tests
  • Listed open field test site or Semi-Anechoic
    Chamber required for all radiated tests.

49
Spread Spectrum Test Software Requirements
  • Must be able to turn on/off transmitter, select
    antenna ports, and go to receive-only mode.
  • Must be able to select low , mid, and high
    channels.
  • Must be able to run in continuous transmit mode.
    This means without any carrier pulsing. If this
    requirement cannot be met, then additional
    corrections are required for many tests.
  • Must be able to check across all data rates and
    modulations.
  • For Bluetooth, must be able to set to DH1, DH2,
    DH3

50
MIMO (802.11n) Considerations
  • 802.11n is not a huge compliance issue.
  • Be sure to measure RF Pout across each chain or
    output port
  • Pout on Grant will be sum of all powers.
  • SAR measurements are still under development by
    the Commission. Some guidance is available

51
Family Antenna Approvals
  • Allows the use similar antennas without
    re-testing or filing a Class II Change.
  • Example A 2dBi inverted-f antenna originally
    approved for use with a specific device. A
    manufacturer can substitute a 0dBi inverted-f
    from a different supplier without re-testing as
    long as conducted TX output power remains the
    same
  • If new antenna of greater gain or different type,
    then Class II PC must be filed.

52
Modular Approval - DA00-1407
  • Must have its own FCC ID number on the module
    itself.
  • An ID inside manual is never sufficient.
  • An additional label is required on the outside of
    the final host device with wording such as
  • Contains Inside FCC ID XXXxxx
  • Must meet the Requirements of OET 65 for RF Safety

53
Full Modular Approvals
  • By Definition, these transmitters must have own
    reference oscillator. In addition a separate
    letter on Applicant letterhead addressing all
    these items must accompany the filing
  • RF shielding.
  • Buffered data input/output ports
  • Power supply regulation
  • Permanent antenna or unique connector
  • Testes in stand alone condition
  • Labeled with own ID number
  • Instructions to operator / OEM integrator
  • Must meet RF Exposure requirements.

54
Limited Modular Approval (LMA)
  • If any of the 8 elements on the preceding slide
    cannot be met, a limited modular approval may be
    obtained in some circumstances. LMAs define
    special circumstances where Certification is
    valid
  • Example 1 Wireless mini-PCI 802.11b/g card
    without voltage regulation
  • Example 2 Wireless mini-PCI 802.11b/g card with
    SAR results which may apply to a specific chassis
    or model notebook PC host.

55
15.203 Unique Connector Requirement
  • Standard Connectors now include
  • SMA, TNC, BNC are not allowed
  • MMCX, MCX and reverse SMA,TNC are possible
    candidates for in this list
  • Integral Antenna requirements which used to be
    part of 15.407 have been eliminated

56
15.204 Power Amplifier Restrictions
  • Must be seen as a complete end-to-end
    transmission system.
  • Must include seperately approved transmitter and
    antenna, in addition to amplifier.
  • Amplifiers designed for use with Spread Spectrum
    Systems must be approved as part of the system
    and marketed as part of a complete package.
  • Additional clarification to 15.204 requirements
    exist in FCC Knowledgebase.

57
Spread Spectrum RF Exposure Requirements
  • 15.247 (b)(4) System shall be operated to
    ensure that public is not exposed to levels of RF
    emissions that exceed the recommended FCC
    Guidelines
  • References
  • OET 65 Supplement C
  • TCB July 17, 2002 Exclusion list

58
General RF Exposure Definitions
  • Fixed or mast mounted on permanent outdoor
    structures.
  • Mobile equipment - greater than 20 cm to the body
  • Portable equipment -20 cm or less to the body.
  • Note A device may be subject to multiple
    categories depending on its use. In this specific
    case, particular attention must be all possible
    usage conditions.

59
Spread Spectrum RF Exposure Requirements
  • Fixed and Mobile Devices must meet OET-65 MPE RF
    Safety Requirements (1 mW/cm2 for 2.4 GHz
    Devices)
  • Portable devices are subject to SAR evaluation
    when conducted or EIRP output power is greater
    than 60/f(GHz) if contact with antenna is
    possible, or 120mW/f(GHz) if a distance of 2.5cm
    can be assured.
  • Does not apply to 15.407 UNII 802.11a. All RF
    category Portable 802.11a devices must undergo
    SAR evaluation regardless of RF Pout

60
Spread Spectrum Test System Requirements
  • All reading below 1 GHz in Quasi-Peak.
  • All readings in both Peak and Average above 1
    GHz.
  • Plots of Band Edge Measurements or Marker Delta
    method

61
Spread Spectrum Testing
  • Transmit Power Peak Measurement - Antenna
    conducted measurement
  • Use power meter with peak head detector
  • Note Certain power meters with VBW
    specifications less than the 6 dB bandwidth of
    the fundamental have caused concern and should be
    avoided
  • Diode detector/signal generator substitution
    method with an oscilloscope.
  • RMS measurement techniques during the period of
    the data burst allowed.

62
Spread Spectrum Testing
  • Radiated Transmit Power Peak Measurement.
  • With highest gain of each antenna family
  • With lowest gain antenna and EUT at Max Power
  • Spectrum Analyzer settings
  • RBW 1 MHz
  • VBW gt RBW

63
Spread Spectrum Testing
  • Band Edge (Radiated) Low and Highest Frequency of
    operation
  • Peak Readings
  • RBW 1 MHz VBW gt RBW
  • Average Readings
  • RBW 1 MHz VBW 10Hz

64
Spread Spectrum Testing
  • Harmonics (Radiated)
  • Frequencies Low, Middle, Highest channels
  • Spectrum Analyzer settings
  • Peak mode RBW 1 MHz VBW gt RBW
  • Average RBW 1 MHz, VBW 10 Hz. Average
    method assumes carrier is at 100 transmit duty
    cycle. Different settings may need to be
    employed if duty cycle is less than 100

65
Spread Spectrum
  • Class II changes cover
  • Addition of second antenna
  • Modification of RF Exposure report
  • Moving from one RF category to another is
    discouraged
  • Limited test suites can be used.
  • i.e. PCMCIA card with new layout would require
    new SAR test plus radiated emissions only. No
    bench tests required.

66
Spread Spectrum Submittal Requirements
  • All spurious emission data above 1 GHz taken with
    average detector, but peak must be provided to
    show compliance with 15.35(b)
  • Data and plots (peak average) for band edge
    emissions
  • Harmonics (peak average) to 10th harmonic
  • TX power (radiated conducted)

67
15.247 Out of Band Emission Requirements
  • In any 100 kHz bandwidth outside the frequency
    band in which the spread spectrum intentional
    radiator is operating, the radio frequency power
    that is produced by the intentional radiator
    shall be at least 20 dB below that in the 100 kHz
    bandwidth within the band that contains the
    highest level of the desired power, based on
    either an RF conducted or radiated measurement.

68
Transmitter Power Output Test
  • Preferred RF Pout measurement Peak Power Meter
    or RMS during period of data burst
  • When measuring RF Conducted Power with spectrum
    analyzer - recommended setting of RBW gt 6 dB of
    EUT emission bandwidth VBW gt RBW

69
Band Edge Testing below 2400 MHz
  • Test on Channel 1
  • For Frequencies between 2390 - 2400 MHz signals
    must be 20 dBc down from fundamental.
  • For 2390 MHz to 2300 - signals must comply with
    15.209 levels (Restricted Bands of 15.205)
  • Must test in all data rates.

70
Band Edge Testing above 2483.5 MHz
  • Upper restricted band begins at 2483.5 MHz band
    edge - all signals must be compliant to 15.209
    limits
  • Difficulties in compliance when 802.11b/g set to
    channel 11. This consistently is the hardest
    test.
  • Some equipment programmed to special power limits
    just to comply with restricted band.
  • Must test in all data rates

71
Harmonics \ Spurious \ Restricted Bands Testing
  • Required for Each transmitter and Antenna
    Combination.
  • Lowest, Middle, and Highest Frequency checked
  • Worst Case RF Pout/data rate checked
  • Up to 10th Harmonic of Fundamental
  • Requires Pre Amp and High Pass Filter
  • Testing Distance 3 meters

72
FCC Submittal Information
  • Test Data
  • Max Output Power (at Antenna port and EIRP)
  • Quasi-Peak lt 1 GHz
  • Both Peak and Average gt 1 GHz
  • Plots of Band Edge Measurements or Marker Delta
    method

73
UNII Devices (802.11a)
74
UNII Devices Part 15 Subpart E
  • Unlicensed National Information Infrastructure
  • Rules adopted in 1997
  • These devices are part of the TCB Scope
  • Frequencies of Operation
  • 5150 - 5250 MHz (Indoor Use Only)
  • 5250 - 5350 MHz (DFS/TPC Required)
  • 5470 - 5725 MHz (DFS/TPC Required)
  • 5725 - 5825 MHz (Shared with 15.247)

75
UNII Devices Part 15 Subpart E
  • Transmitter Power Output
  • 5150-5250 MHz Band 50 mW
  • 5250-5350 MHz Band 250 mW
  • 5470-5725 MHz Band 250 mW
  • 5725-5825 MHz Band 1 Watt
  • All RF category Portable UNII devices must have
    SAR testing

76
UNII Devices Part 15 Subpart E
  • All DFS test reports must be approved by FCC
  • Client only devices which do not have DFS but
    will change channels in response to commands from
    an access point are allowed to be approved by
    TCBs
  • Client only devices must be tested with DFS
    capable golden transmitter
  • Client only devices cannot be capable of ad-hoc
    capability

77
UNII Devices Part 15 Subpart E
  • Antennas limited to 6 dBi gain without
    transmitter power reduction.
  • Low bands may use antennas gt 6 dBi, however
    transmit power and power spectral density must be
    reduced by gain of antenna that exceed 6 dBi
  • 5.8 GHz band allows use of up to 23 dBi gain
    antenna for point to point systems without
    transmitter power reduction.

78
Contact Information
  • William H. Graff
  • President and Director of Engineering
  • AmericanTCB, Inc.
  • 6731 Whittier Ave.
  • McLean, VA 22101
  • mailto whgraff_at_ATCB.com
  • Corporate Phone (703)847-4700
  • Corporate FAX (703)847-6888
  • Direct Mobile 886 920399260
  • SKYPE whgraff
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