MPE report

FCC ID: LDKSPKSH1576

RF Exposure Info

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FCCID_3870552

EDCS#: 12180049




              Maximum Permissible Exposure Study - Engineering Analysis

                                                       For

                                            Model: SPK-SHARE

  2.4 GHz /5.0 GHz Wi-Fi Radio 802.11a/ac/b/g/n + Bluetooth v2.1 + BTLE v4.0

                                       FCC ID: LDKSPKSH1576
                                      ISED ID: 2461L-SPKSH1576

                                     Against the following Specifications:

                             47 Code of Federal Regulations 2.1091
                               Industry Canada RSS-102 Issue 5

                                             Cisco Systems
                                         170 West Tasman Drive
                                          San Jose, CA 95134




This report replaces any previously entered test report under EDCS –. This test report has been electronically authorized and
archived using the CISCO Doc Central. Test Report Template EDCS# 11556830 & EDCS# 11556831.



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EDCS#: 12180049



Prepared By: Cisco Systems Inc                                       Date: 01/15/2018
170 West Tasman
San Jose, CA 95134
USA



1.0 Attestation Statement of Compliance

The Cisco Systems SPK-SHARE dongle with integrated 802.11a/b/g/n/ac and 802.15 radios
have been evaluated for Maximum Permissible Exposure in compliance with 47 Code of
Federal Regulations 2.1093. The evaluation was in accordance with methodology as referenced
in FCC KDB 447498 D01 General RF Exposure Guidance v06
This report serves as the additional technical analysis of the Cisco radio modules

The limits used for this evaluation are in line with the recommendations of the World Health
Organizations (WHO) International Committee on Non Ionizing Radiation Protection (ICNIRP)
as well as the American National Standards Institute (ANSI) C95.1.

The limits chosen are of General Population/Uncontrolled Exposure.

This analysis also complies with the requirements stated in Industry Canada RSS-102 as well as
the applicable Australian and New Zealand regulations.

Only the following case scenario was used which are:
2.4GHz WLAN Radio:                FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5250-5350MHz WLAN Radio: FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5470-5725MHz WLAN Radio: FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
Output power listed is conducted. The antenna(s) used for this device must be installed to
provide a separation distance of at least 20 cm from all persons. Installers must be provided with
antenna installation and transmitter operating conditions for satisfying RF exposure compliance.

Based on the study this case scenario, the General Population/Uncontrolled Exposure and the
minimum recommended distance is around 20cm (8 inches) from the antenna.




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EDCS#: 12180049


The SPK_SHARE dongle radio has been evaluated for Maximum Permissible Exposure in
compliance with 47 Code of Federal Regulations 2.1091 and RSS-102 Issue 5. The evaluation
was in accordance with methodology as referenced in FCC Bulletin OET 65C (rev 01-01) along
with KDB 447498 D01 General RF Exposure Guidance. This report serves as the additional
technical analysis of the Cisco radio modules

The limits chosen are of General Population/Uncontrolled Exposure.

The limits used for this evaluation are in line with the recommendations of the World Health
Organizations (WHO) International Committee on Non Ionizing Radiation Protection (ICNIRP)
as well as the American National Standards Institute (ANSI) C95.1.

This analysis also complies with the requirements stated in Industry Canada RSS-102 as well as
the applicable Australian and New Zealand regulations.

The following case scenarios were used:

Bluetooth Low Energy report      FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
Bluetooth Basic Rate/ EDR report FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
2.4GHz DTS report                FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5GHz UNII-1 report               FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5GHz UNII-2A report              FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5GHz UNII-2C report              FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576
5GHz UNII-3 report               FCC ID: LDKSPKSH1576, IC: 2461L-SPKSH1576

This device must be installed to provide a separation distance of at least 20 cm from all persons.
Installers must be provided with antenna installation and transmitter operating conditions for
satisfying RF exposure compliance.

Based on the study this case scenario, the General Population/Uncontrolled Exposure and the
minimum recommended distance is around 20cm (8 inches) from the antenna.




Danh Le
Test Engineer
Cisco Systems Inc
Corporate Compliance and Certifications
125 West Tasman Drive
San Jose, CA 95134
Email: danhl@ciso.com




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EDCS#: 12180049


2.0 EUT Description.

SPK_SHARE wireless dongle

Cisco SPK-SHARE dongle is the next generation cloud collaboration platform that
unifies messaging, meeting and calling and content-sharing. Cisco SPK-Share provides HDMI
support for connection to a display and USB Type-C interface to receive 5V power. Cisco SPK-
Share offers both wired and wireless solution with Ethernet via USB 2.0 external adapter and
802.11a/b/g/n/ac, Bluetooth classic and Bluetooth LE radios.

Below are brief summary of the SPK-SHARE hardware specifications:

Wired Protocol support
● USB C main interface (Power, Ethernet via USB2)
● External POE Ethernet adapter (Ethernet Injector accessory connected via USB type C)
  - Ethernet: 10/100/1000BASE-T Ethernet network (IEEE 802.3i/802.3u/802.3ab/802.3az)
● External18W power supply (Direct connected via USB)


Wireless Protocols support
● Wi-Fi: IEEE 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
● Bluetooth: IEEE 802.15 Basic Rate + EDR v3.0, Low Energy v4.1

       2.4GHz FHSS Radio Supported Modes:
      802.15 BlueTooth ver 2.1+EDR (1Mbps – 3Mbps)

       2.4GHz BTLE Radio Supported Modes:
      802.15 BlueTooth ver 4.1 (1Mbps)

      2.4GHz WLAN Radio Supported Modes:
      802.11b (1Mbps – 11Mbps)
      802.11g (6Mbps - 54Mbps)
      802.11n (HT20, MCS0 – MCS7)
      802.11n (HT40, MCS0 – MCS9)

       5GHz WLAN Radio Supported Modes:
      802.11a (6Mbps – 54Mbps)
      802.11n (HT20, MCS0 – MCS15)
      802.11n (HT40, MCS0 – MCS15)
      802.11ac (VHT40, MCS0 – MCS19)
      802.11ac (VHT80, MCS0 – MCS19)




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EDCS#: 12180049

The following antennas are supported by this product series.
The data included in this report represent the worst case data for all antennas.

     Frequency                                                                          Antenna Gain
                                 Part Number                Antenna Type
       (MHz)                                                                             Peak (dBi)
     2400 – 2500           CI8847-11-000-R-FA                       PIFA                    1.24
     5150 – 5250           CI8847-11-000-R-FA                       PIFA                    4.26
     5250 – 5350           CI8847-11-000-R-FA                       PIFA                    4.26
     5470 – 5725           CI8847-11-000-R-FA                       PIFA                    3.77
     5725 – 5850           CI8847-11-000-R-FA                       PIFA                    2.85


3.0 Methodology
All calculations were made in accordance with ANSI C95.1, and FCC 447498 D01 General RF Exposure
Guidance v06.

Measurement Uncertainty Values
 Parameter                                                 Max MU from      Declared MU
                                                           standard

 Occupied Channel Bandwidth                                +/- 5%           +/-2%

 RF Output Power, conducted                                +/- 1,5dB        +/-1.4dB

 Power Spectral Density, conducted                         +/- 3dB          +/- 2dB

 Unwanted emissions, conducted                             +/- 3dB          +/- 2dB

 All emissions, radiated                                   +/- 6dB          +/- 3.2dB

 Temperature                                               +/- 3C           +/- 0.7C

 Supply Voltages                                           +/- 3%           +/- 2.5%

 Time                                                      +/- 5%           +/-2%




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EDCS#: 12180049



4.0 Technical Requirements
       4.1 Single Band Operation – Limits


FCC Limits for Maximum Permissible Exposure (MPE)
(A) Limits for Occupational/Controlled Exposure


  Frequency         Electric Field     Magnetic Field      Power Density      Averaging Time
    Range           Strength (E)       Strength (H)            (S)             |E|2, |H|2 or S
    (MHz)              (V/m)               (A/m)             (mW/cm2)            (minutes)

   0.3-3.0               614                 1.63               (100)*               6
   3.0-30               1842/f              4.89/f             (900/f2)*             6
   30-300                61.4               0.163                 1.0                6
  300-1500                --                  --                 f/300               6
1500-100,000              --                  --                   5                 6



(B) Limits for General Population/Uncontrolled Exposure


  Frequency         Electric Field     Magnetic Field      Power Density      Averaging Time
    Range           Strength (E)       Strength (H)            (S)             |E|2, |H|2 or S
    (MHz)              (V/m)               (A/m)             (mW/cm2)            (minutes)

   0.3-1.34              614                 1.63               (100)*               30
   1.34-30              824/f               2.19/f             (180/f2)*             30
    30-300              27.5                0.073                 0.2                30
  300-1500                --                  --                f/1500               30
1500-100,000              --                  --                  1.0                30

          f = frequency in MHz                       *Plane-wave equivalent power density

NOTE 1: See Section 1 for discussion of exposure categories.

NOTE 2: The averaging time for General Population/Uncontrolled exposure to fixed transmitters is not
        applicable for mobile and portable transmitters. See 47 CFR §§2.1091 and 2.1093 on source-
        based time-averaging requirements for mobile and portable transmitters.




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EDCS#: 12180049



Devices are subject to the radio frequency radiation exposure requirements specified in RSS-102 Issue 5.
All equipment shall be considered to operate in a “general population/uncontrolled” environment.

Limit for RF Exposure

RSS-102, issue 5, section 2.5.2 or from section 4, table 4

   Frequency                                                                        Reference
                    Electric Field      Magnetic Field        Power Dentisty
   Range                                                                            Period
   (MHz)            (V/m rms)           (A/m rms)             (W/m2)                (minutes)

   300-6000         __                  __                    0.02619 ƒ 0.6834      6

   Note: ƒ is frequency in MHz.




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EDCS#: 12180049


5.0 Calculations
The RSS RF Exposure limits (W/m2) are calculated as follows:

Limit calculation

Worst case 2.4GHz DTS channel is channel 11 (2462MHz)

0.02619 ƒ0.6834 = 0.02619 x (2462 0.6834) = 0.02619 x 207.78 = 5.44 W/m2

Worst case 2.4GHz FHSS channel is channel 79 (2480MHz)

0.02619 ƒ0.6834 = 0.02619 x (2480 0.6834) = 0.02619 x 208.82 = 5.47 W/m2

Worst case 2.4GHz BTLE channel is channel 39 (2480MHz)

0.02619 ƒ0.6834 = 0.02619 x (2480 0.6834) = 0.02619 x 208.82 = 5.47 W/m2

Worst case 5GHz UNII-1 channel is channel 44 (5220MHz)

0.02619 ƒ0.6834 = 0.02619 x (5220 0.6834) = 0.02619 x 347.26 = 9.09 W/m2

Worst case 5GHz UNII-2A channel is channel 64 (5320MHz)

0.02619 ƒ0.6834 = 0.02619 x (5320 0.6834) = 0.02619 x 351.79 = 9.21 W/m2

Worst case 5GHz UNII-2C channel is channel 132 (5660MHz)

0.02619 ƒ0.6834 = 0.02619 x (5660 0.6834) = 0.02619 x 367.01 = 9.61 W/m2

Worst case 5GHz UNII-3 channel is channel 157 (5785MHz)

0.02619 ƒ0.6834 = 0.02619 x (5785 0.6834) = 0.02619 x 372.53 = 9.76 W/m2




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EDCS#: 12180049



The Power Density (mW/cm2) is calculated as follows:

S = PG (Duty Cycle) / 4πR2                     (Equation 1)

Solve for R


R=                                             (Equation 2)


Where:
S = power density (in appropriate units, e.g. mW/cm2)
P = power input to the antenna (in appropriate units, e.g., mW)
G = power gain of the antenna in the direction of interest relative to an isotropic radiator
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm)
DC= Duty Cycle




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EDCS#: 12180049


6.0 Results
Test Reports used in evaluation are :

Bluetooth Low Energy report      FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
Bluetooth Basic Rate/ EDR        FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
2.4GHz DTS report                FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
5GHz UNII-1 report               FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
5GHz UNII-2A report              FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
5GHz UNII-2C report              FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576
5GHz UNII-3 report               FCC ID: LDKSPKSH1576, ISED ID: 2461L-SPKSH1576




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EDCS#: 12180049


MPE Calculations

S=1mW/cm²maximum. The highest supported antenna gain is 1.24 dBi for 2.4GHz radio and
4.26 dBi for 5 GHz radio.

Table 1 below contains the calculated Power Density Level by applying the formula in Equation
1 above.

Table 1
                          Power Density Level @ 20 cm Distance
  Frequency    Data      Total Peak        Ant.     FCC/RSS        Calculated      FCC            RSS
               Rate      TX Power          Gain    Min. Distance    Power       PowerDensity   PowerDensity
                       Ant. Port0 +Port1             Allowed        Density        Limit          Limit
                                                                                  @20 cm         @20 cm
    (MHz)     (Mbps)        (dBm)          (dBi)        (cm)       (mW/cm²)      (mW/cm²)       (mW/cm²)
                             Radio#1 Mode: 802.11b (2.4 GHz Wi-Fi)
    2462        1           20.39      1.24         20         0.029                 1            0.091
                             Radio#2 Mode: 802.15 (2.4 GHz Bluetooth /FHSS)
    2480        1           5.78       1.24         20         0.001                 1            0.091
                             Radio#3 Mode: 802.15 (2.4 GHz Bluetooth LE)
    2480        1           2.30       1.24         20         0.000                 1            0.091
                             Radio#4 Mode: 802.11a (5 GHz Wi-Fi (UNII-1))
    5220        6           16.37      4.26         20         0.023                 1            0.091
                            Radio#5 Mode: 802.11a (5 GHz Wi-Fi (UNII-2A))
    5320        6           16.25      4.26         20         0.022                 1            0.091
                            Radio#6 Mode: 802.11a (5 GHz Wi-Fi (UNII-2C))
    5660        6           14.54      3.77         20         0.013                 1            0.091
                            Radio#7 Mode: 802.11a (5 GHz Wi-Fi (UNII-3))
    5785        6           15.69      2.85         20         0.014                 1            0.091




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EDCS#: 12180049


MPE Calculations (continue)
To maintain compliance with the FCC / RSS power density limit (1mW/cm²), installations will
assure a separation distance of at least 20cm or according to the calculated minimum distance
entered in table 2.

Table 2 below contains the calculated minimum distance allowed by applying the formula in
Equation 2 above.

Table 2
                          Calculated Minimum Distance Allowed
  Frequency    Data      Total Peak        Ant.    Calculated   Calculated Closet   FCC/RSS     Margin
               Rate      TX Power          Gain     Power       Distance Allowed     Limit
                       Ant. Port0 +Port1            Density      Without Going      Distance
                                                                   Over Limit
    (MHz)     (Mbps)        (dBm)          (dBi)   (mW/cm²)           (cm)            (cm)     (mW/cm²)
                                Radio#1 Mode: 802.11b (2.4 GHz Wi-Fi)
    2462         1          20.39        1.24     0.029          3.41                 20         16.6
                                Radio#2 Mode: 802.15 (2.4 GHz Bluetooth /FHSS)
    2480         1           5.78        1.24     0.001          0.63                 20         19.4
                               Radio#3 Mode: 802.15 (2.4 GHz Bluetooth LE)
    2480         1           2.30        1.24     0.000            0                  20          20
                                Radio#4 Mode: 802.11a (5 GHz Wi-Fi (UNII-1))
    5220         6          16.37        4.26     0.023          3.03                 20         17.0
                               Radio#5 Mode: 802.11a (5 GHz Wi-Fi (UNII-2A))
    5320         6          16.25        4.26     0.022          2.97                 20         17.0
                               Radio#6 Mode: 802.11a (5 GHz Wi-Fi (UNII-2C))
    5660         6          14.54        3.77     0.013          2.28                 20         17.7
                               Radio#7 Mode: 802.11a (5 GHz Wi-Fi (UNII-3))
    5785         6          15.69        2.85     0.014          2.38                 20         17.6




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EDCS#: 12180049


Calculations with simultaneous transmitters

Scenerio1 :
2400MHz to 2483.5MHz (DTS) radio
5150MHz to 5150MHz (UNII-1) radio

  Tx1        Tx2         Tx3         Tx4     Tx5      Tx6     Tx7      % of Standard
  0.029                              0.023                             0.052

Tx1     + Tx4       =   % of Standard
(0.029) + (0.023)   =   0.052
D (estimate)        =   20 √0.052%
D                   =   4.56 cm




Scenerio2 :
2400MHz to 2483.5MHz (BT BR) radio
2400MHz to 2483.5MHz (DTS) radio
5250MHz to 5350MHz (UNII-2A) radio

  Tx1        Tx2         Tx3         Tx4     Tx5      Tx6     Tx7      % of Standard
  0.029      0.001                   0.023                             0.053

Tx1     + Tx2     + Tx4        = % of Standard
(0.029) + (0.001) + (0.023)    = 0.053
D (estimate)                   = 20 √0.053%
D                              = 4.60 cm


The configuration above co-location calculation is for General Population/Uncontrolled
exposure. The minimum distance recommended is 20 cm (8 inches) when all antennas are
within 20 cm of each other.




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EDCS#: 12180049


Using the provided FCC MPE-Mobile.xls file, the “% MPE contour” summary tables and
charts are given below for the simultaneous cases listed above.

%MPE contour of 2462MHz (2.4GHz Wi-Fi), 2480MHz (2.4GHz BT BR) &
5220MHz (5 GHz Wi-Fi) radios
  Antenna No.             Total      1       2       3       4       5       6
   Tx Status                        On      On     Off      On     Off     Off
   Frequency      MHz             2462    2480    1900    5220    2450    5800
   MPE Limit     mW/cm2            1.00    1.00    0.00    1.00    0.00    0.00
  Max % MPE        %       5.1      2.9     0.1     0.0     2.3     0.0     0.0
     Power        (W)     0.156   0.109   0.004   0.000   0.043   0.000   0.000
  Antenna Gain    dBi              1.24    1.24    3.00    4.26    0.50    1.00
     EIRP         (W)     0.27    0.145   0.005   0.000   0.115   0.000   0.000




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EDCS#: 12180049


References

American National Standards Institute (ANSI), "Safety Levels with Respect to Human
Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," ANSI/IEEE
C95.1-1992 (previously issued as IEEE C95.1-1991). Copyright 1992 by the Institute of
Electrical and Electronics Engineers, Inc. (IEEE), New York, N.Y. 10017. For copies contact
the IEEE: 1-800-678-4333 or 1-908-981-1393.
American National Standards Institute (ANSI), "Recommended Practice for the Measurement
of Potentially Hazardous Electromagnetic Fields - RF and Microwave”. ANSI/IEEE C95.3-
1992. Copyright 1992, The Institute of Electrical and Electronics Engineers, Inc. (IEEE), New
York, NY 10017. For copies contact the IEEE: 1-800-678-4333 or 1-908-981-1393.

FCC OET 65C Evaluating Compliance with FCC Guidelines for Human Exposure to RF
Fields from 9KHz to 40 GHz

FCC KDB 447498 D01 General RF Exposure Guidance v06




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Document Created: 2018-05-25 16:17:05
Document Modified: 2018-05-25 16:17:05

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