Test report2

FCC ID: 2ASU5-TS552

Test Report

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FCCID_4235111

V1.0                                   Page 31 of 54               Report No.: CTL1903141011-WF



3.6. Number of hopping frequency
Limit

Frequency hopping systems in the 2400–2483.5 MHz band shall use at least 15 channels.

Test Procedure

The transmitter output was connected to the spectrum analyzer through an attenuator. Set spectrum
analyzer start 2400MHz to 2483.5MHz with 100 KHz RBW and 300 KHz VBW.

Test Configuration


                                                       SPECTRUM
                     EUT                               ANALYZER

Test Results

        Modulation         Number of Hopping Channel              Limit              Result
          GFSK                         79
        π/4DQPSK                       79                         ≥15                Pass
         8DPSK                         79

Test plot as follows:


V1.0   Page 32 of 54         Report No.: CTL1903141011-WF



         GFSK Modulation




       π/4DQPSK Modulation




        8DPSK Modulation


V1.0                                       Page 33 of 54                Report No.: CTL1903141011-WF



3.7. Time of Occupancy (Dwell Time)
Limit

The average time of occupancy on any channel shall not be greater than 0.4 seconds within a period of
0.4 seconds multiplied by the number of hopping channels employed.

Test Procedure

The transmitter output was connected to the spectrum analyzer through an attenuator. Set center
frequency of spectrum analyzer=operating frequency with 1MHz RBW and 1MHz VBW, Span 0Hz.

Test Configuration

                                                            SPECTRUM
                      EUT                                   ANALYZER

Test Results

                                     Pulse time            Dwell time
 Modulation          Packet                                                 Limit (s)         Result
                                        (ms)                 (s)
                      DH1              0.409                 0.131
     GFSK             DH3              1.664                 0.266            0.40             Pass
                      DH5              2.912                 0.311
                     2-DH1             0.419                 0.134
π/4DQPSK             2-DH3             1.670                 0.267            0.40             Pass
                     2-DH5             2.918                 0.311
                     3-DH1             0.418                 0.134
     8DPSK           3-DH3             1.670                 0.267            0.40             Pass
                     3-DH5             2.917                 0.311
Note:
1.     We have tested all mode at high,middle and low channel,and recoreded worst case at middle channel.

2.     Dwell time=Pulse time (ms) × (1600 ÷ 2 ÷ 79) ×31.6 Second for DH1, 2-DH1, 3-DH1

       Dwell time=Pulse time (ms) × (1600 ÷ 4 ÷ 79) ×31.6 Second for DH3, 2-DH3, 3-DH3

       Dwell time=Pulse time (ms) × (1600 ÷ 6 ÷ 79) ×31.6 Second for DH5, 2-DH5, 3-DH5


Test plot as follows:


V1.0   Page 34 of 54      Report No.: CTL1903141011-WF



        GFSK Modulation




               DH1




               DH3




               DH5


V1.0   Page 35 of 54         Report No.: CTL1903141011-WF



       π/4DQPSK Modulation




              2-DH1




              2-DH3




              2-DH5


V1.0   Page 36 of 54       Report No.: CTL1903141011-WF



        8DPSK Modulation




              3-DH1




              3-DH3




              3-DH5


V1.0                                     Page 37 of 54                 Report No.: CTL1903141011-WF



3.8. Out-of-band Emissions
Limit
In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally
modulated 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 con-ducted or a radiated
measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power
limits. If the transmitter com-plies with the conducted power limits based on the use of RMS averaging
over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under
this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in
§15.209(a) is not required.

Test Procedure

Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum
analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing
these setting are made of the in-band reference level, bandedge and out-of-band emissions.


Test Configuration

                                                              SPECTRUM
                                 EUT
                                                              ANALYZER


Test Results

Remark: The measurement frequency range is from 30MHz to the 10th harmonic of the fundamental
frequency. The lowest, middle and highest channels are tested to verify the spurious emissions and
bandage measurement data.
We measured all conditions (DH1, DH3, DH5) and recorded worst case at DH5

Test plot as follows:


V1.0                Page 38 of 54   Report No.: CTL1903141011-WF



       GFSK CH00                    GFSK CH39




        Reference                    Reference




       30MHz-3GHz                   30MHz-3GHz




       3GHz-25GHz                   3GHz-25GHz


V1.0                Page 39 of 54    Report No.: CTL1903141011-WF



       GFSK CH78                    π/4DQPSK CH00




        Reference                     Reference




       30MHz-3GHz                    30MHz-3GHz




       3GHz-25GHz                    3GHz-25GHz


V1.0                   Page 40 of 54    Report No.: CTL1903141011-WF



       π/4DQPSK CH39                   π/4DQPSK CH78




         Reference                       Reference




        30MHz-3GHz                      30MHz-3GHz




        3GHz-25GHz                      3GHz-25GHz


V1.0                Page 41 of 54   Report No.: CTL1903141011-WF



       8DPSK CH00                   8DPSK CH39




        Reference                    Reference




       30MHz-3GHz                   30MHz-3GHz




       3GHz-25GHz                   3GHz-25GHz


V1.0                Page 42 of 54   Report No.: CTL1903141011-WF



                       8DPSK CH78




        Reference                   30MHz-3GHz




       3GHz-25GHz


V1.0                                 Page 43 of 54         Report No.: CTL1903141011-WF

Band-edge Measurements for RF Conducted Emissions:
                                       GFSK




         Left Band edge hoping off                   Right Band edge hoping off




         Left Band edge hoping on                    Right Band edge hoping on

                                         π/4DQPSK




         Left Band edge hoping off                   Right Band edge hoping off


V1.0                               Page 44 of 54         Report No.: CTL1903141011-WF




       Left Band edge hoping on                    Right Band edge hoping on

                                         8DPSK




       Left Band edge hoping off                   Right Band edge hoping off




       Left Band edge hoping on                    Right Band edge hoping on


V1.0                                     Page 45 of 54                 Report No.: CTL1903141011-WF



3.9. Pseudorandom Frequency Hopping Sequence
TEST APPLICABLE

For 47 CFR Part 15C section 15.247 (a) (1) requirement:
Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum
of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively,
frequency hopping systems operating in the 2400–2483.5 MHz band may have hopping channel
carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping
channel, whichever is greater, provided the systems operate with an output power no greater than 125
mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a
pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the
average by each transmitter. The system receivers shall have input bandwidths that match the
hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in
synchronization with the transmitted signals.

EUT Pseudorandom Frequency Hopping Sequence Requirement
The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register
whose 5th and 9th stage outputs are added in a modulo-two addition stage. And the result is fed back to
the input of the first stage. The sequence begins with the first one of 9 consecutive ones, for example:
the shift register is initialized with nine ones.
● Number of shift register stages:9
● Length of pseudo-random sequence:29-1=511 bits
● Longest sequence of zeros:8(non-inverted signal)




An example of pseudorandom frequency hopping sequence as follows:




Each frequency used equally one the average by each transmitter.
The system receiver have input bandwidths that match the hopping channel bandwidths of their
corresponding transmitter and shift frequencies in synchronization with the transmitted signals.


V1.0                                     Page 46 of 54                 Report No.: CTL1903141011-WF


3.10.     Antenna Requirement
Standard Applicable
For intentional device, according to FCC 47 CFR Section 15.203, 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.
And according to FCC 47 CFR Section 15.247 (c), if transmitting antennas of directional gain greater
than 6dBi are used, the power shall be reduced by the amount in dB that the directional gain of the
antenna exceeds 6dBi.

Refer to statement below for compliance
The manufacturer may design the unit so that the user can replace a broken antenna, but the use of a
standard antenna jack or electrical connector is prohibited. Further, this requirement does not apply to
intentional radiators that must be professionally installed.

Antenna Connected Construction

The maximum gain of antenna was 0dBi.




           BT
         Antenna


V1.0                    Page 47 of 54   Report No.: CTL1903141011-WF


4. Test Setup Photos of the EUT


V1.0                    Page 48 of 54           Report No.: CTL1903141011-WF


5. Photos of the EUT
                       External Photos of EUT


V1.0   Page 49 of 54   Report No.: CTL1903141011-WF


V1.0    Page 50 of 54           Report No.: CTL1903141011-WF




       Internal Photos of EUT


V1.0   Page 51 of 54   Report No.: CTL1903141011-WF


V1.0         Page 52 of 54   Report No.: CTL1903141011-WF




BT antenna


V1.0   Page 53 of 54   Report No.: CTL1903141011-WF


V1.0                   Page 54 of 54                Report No.: CTL1903141011-WF




       ********************** End of Report **********************



Document Created: 2019-04-10 15:43:52
Document Modified: 2019-04-10 15:43:52

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