14_MZX770 TestRpt_p2

FCC ID: 2ALHZNB-1090

Test Report

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FCCID_4138280

Page 35 of 67 Report No.: HK1812101838E 6. Radiated Emission 6.1. Measurement Procedure 1. The EUT was placed on the top of the turntable 0.8 or 1.5 meter above ground. The phase center of the receiving antenna mounted on the top of a height-variable antenna tower was placed 3 meters far away from the turntable. 2. Power on the EUT and all the supporting units. The turntable was rotated by 360 degrees to determine the position of the highest radiation. 3. The height of the broadband receiving antenna was varied between one meter and four meters above ground to find the maximum emissions field strength of both horizontal and vertical polarization. 4. For each suspected emissions, the antenna tower was scan (from 1 M to 4 M) and then the turntable was rotated (from 0 degree to 360 degrees) to find the maximum reading. 5. Set the test-receiver system to Peak or CISPR quasi-peak Detect Function with specified bandwidth under Maximum Hold Mode. 6. For emissions above 1GHz, use 1MHz RBW and 3MHz VBW for peak reading. Place the measurement antenna away from each area of the EUT determined to be a source of emissions at the specified measurement distance, while keeping the measurement antenna aimed at the source of emissions at each frequency of significant emissions, with polarization oriented for maximum response. The measurement antenna may have to be higher or lower than the EUT, depending on the radiation pattern of the emission and staying aimed at the emission source for receiving the maximum signal. The final measurement antenna elevation shall be that which maximizes the emissions. The measurement antenna elevation for maximum emissions shall be restricted to a range of heights of from 1 m to 4 m above the ground or reference ground plane. 7. When the radiated emissions limits are expressed in terms of the average value of the emissions, and pulsed operation is employed, the measurement field strength shall be determined by averaging over one complete pulse train, including blanking intervals, as long as the pulse train does not exceed 0.1 seconds. As an alternative (provided the transmitter operates for longer than 0.1 seconds) or in cases where the pulse train exceeds 0.1 seconds, the measured field strength shall be determined from the average absolute voltage during a 0.1 second interval during which the field strength is at its maximum values. 8.If the emissions level of the EUT in peak mode was 3 dB lower than the average limit specified, then testing will be stopped and peak values of EUT will be reported, otherwise, the emissions which do not have 3 dB margin will be repeated one by one using the quasi-peak method for below 1GHz. 9. For testing above 1GHz, the emissions level of the EUT in peak mode was lower than average limit (that means the emissions level in peak mode also complies with the limit in average mode), then testing will be stopped and peak values of EUT will be reported, otherwise, the emissions will be measured in average mode again and reported. 10. In case the emission is lower than 30MHz, loop antenna has to be used for measurement and the recorded data should be QP measured by receiver. High - Low scan is not required in this case.

Page 36 of 67 Report No.: HK1812101838E The following table is the setting of spectrum analyzer and receiver. Spectrum Parameter Setting Start ~Stop Frequency 9KHz~150KHz/RB 200Hz for QP Start ~Stop Frequency 150KHz~30MHz/RB 9KHz for QP Start ~Stop Frequency 30MHz~1000MHz/RB 120KHz for QP 1GHz~26.5GHz Start ~Stop Frequency 1MHz/3MHz for Peak, 1MHz/10Hz for Average Receiver Parameter Setting Start ~Stop Frequency 9KHz~150KHz/RB 200Hz for QP Start ~Stop Frequency 150KHz~30MHz/RB 9KHz for QP Start ~Stop Frequency 30MHz~1000MHz/RB 120KHz for QP

Page 37 of 67 Report No.: HK1812101838E 6.2. Test Setup Radiated Emission Test-Setup Frequency Below 30MHz RADIATED EMISSION TEST SETUP 30MHz-1000MHz RADIATED EMISSION TEST SETUP ABOVE 1000MHz

Page 38 of 67 Report No.: HK1812101838E 6.3. Limits and Measurement Result 15.209&RSS-GEN Limit in the below table has to be followed Frequencies Field Strength Measurement Distance (MHz) (micorvolts/meter) (meters) 0.009~0.490 2400/F(KHz) 300 0.490~1.705 24000/F(KHz) 30 1.705~30.0 30 30 30~88 100 3 88~216 150 3 216~960 200 3 Above 960 500 3 Note: All modes were tested For restricted band radiated emission, the test records reported below are the worst result compared to other modes.

Page 39 of 67 Report No.: HK1812101838E RADIATED EMISSION BELOW 30MHZ No emission found between lowest internal used/generated frequencies to 30MHz. RADIATED EMISSION BELOW 1GHZ EUT Bluetooth headset Model Name MZX770 Relative Temperature 25°C 55.4% Humidity Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Horizontal RESULT: PASS

Page 40 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Relative Temperature 25°C 55.4% Humidity Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 4 Antenna Vertical RESULT: PASS Note: 1. Factor=Antenna Factor + Cable loss, Margin=Measurement-Limit. 2. All test modes had been pre-tested. The mode 4 is the worst case and recorded in the report.

Page 41 of 67 Report No.: HK1812101838E RADIATED EMISSION ABOVE 1GHZ EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Horizontal Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4804.042 46.42 3.76 50.18 74 -23.82 peak 4804.042 44.51 3.76 48.27 54 -5.73 AVG 7206.063 36.01 8.17 44.18 74 -29.82 peak 7206.063 33.16 8.17 41.33 54 -12.67 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Vertical Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4804.042 47.69 3.76 51.45 74 -22.55 peak 4804.042 45.17 3.76 48.93 54 -5.07 AVG 7206.063 38.71 8.17 46.88 74 -27.12 peak 7206.063 35.90 8.17 44.07 54 -9.93 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier.

Page 42 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 2 Antenna Horizontal Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4882.042 46.46 3.78 50.24 74.00 -23.76 peak 4882.042 43.82 3.78 47.60 54.00 -6.40 AVG 7323.063 40.25 8.23 48.48 74.00 -25.52 peak 7323.063 38.65 8.23 46.88 54.00 -7.12 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 2 Antenna Vertical Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4882.042 47.86 3.78 51.64 74.00 -22.36 peak 4882.042 44.59 3.78 48.37 54.00 -5.63 AVG 7323.063 41.48 8.23 49.71 74.00 -24.29 peak 7323.063 38.45 8.23 46.68 54.00 -7.32 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier.

Page 43 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Horizontal Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4960.042 46.86 3.81 50.67 74.00 -23.33 peak 4960.042 45.50 3.81 49.31 54.00 -4.69 AVG 7440.063 39.95 8.27 48.22 74.00 -25.78 peak 7440.063 35.18 8.27 43.45 54.00 -10.55 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. EUT Bluetooth headset Model Name MZX770 Relative Temperature 25°C 55.4% Humidity Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Vertical Frequency Meter Reading Factor Emission Level Limits Margin Value Type (MHz) (dBμV) (dB) (dBμV/m) (dBμV/m) (dB) 4960.042 47.57 3.81 51.38 74.00 -22.62 peak 4960.042 45.70 3.81 49.51 54.00 -4.49 AVG 7440.063 39.94 8.27 48.21 74.00 -25.79 peak 7440.063 38.35 8.27 46.62 54.00 -7.38 AVG Remark: Factor = Antenna Factor + Cable Loss – Pre-amplifier. RESULT: PASS Note: Other emissions from 1G to 25 GHz are considered as ambient noise. No recording in the test report. Factor = Antenna Factor + Cable loss - Amplifier gain, Over=Measure-Limit. The “Factor” value can be calculated automatically by software of measurement system. All test modes had been tested. The GFSK modulation is the worst case and recorded in the report.

Page 44 of 67 Report No.: HK1812101838E TEST RESULT FOR RESTRICTED BANDS REQUIREMENTS EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Horizontal PK AV RESULT: PASS

Page 45 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 1 Antenna Vertical PK AV RESULT: PASS

Page 46 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Horizontal PK AV RESULT: PASS

Page 47 of 67 Report No.: HK1812101838E EUT Bluetooth headset Model Name MZX770 Temperature 25°C Relative Humidity 55.4% Pressure 960hPa Test Voltage Normal Voltage Test Mode Mode 3 Antenna Vertical PK AV RESULT: PASS Note: The factor had been edited in the “Input Correction” of the Spectrum Analyzer. So the Amplitude of test plots is equal to Reading level plus the Factor in dB. Use the A dB(μV) to represent the Amplitude. Use the F dB(μV/m) to represent the Field Strength. So A=F. All test modes had been pre-tested. The GFSK modulation is the worst case and recorded in the report.

Page 48 of 67 Report No.: HK1812101838E 7. Number of Hopping Frequency 7.1. Measurement Procedure The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: The frequency band of operation. Depending on the number of channels the device supports, it may be necessary to divide the frequency range of operation across multiple spans, to allow the individual channels to be clearly seen. 2. RBW: To identify clearly the individual channels, set the RBW to less than 30% of the channel spacing or the 20 dB bandwidth, whichever is smaller. 3. VBW ≥ RBW. Sweep: Auto. Detector function: Peak. Trace: Max hold. 4. Allow the trace to stabilize. 7.2. Test Setup (Block Diagram of Configuration) Same as described in section 4.2 7.3. Limits and Measurement Result MEASUREMENT TOTAL NO. OF LIMIT (NO. OF CH) RESULT (NO. OF CH) HOPPING CHANNEL >=15 79 PASS TEST PLOT FOR NO. OF TOTAL CHANNELS Note: The 8-DPSK modulation is the worst case and recorded in the report.

Page 49 of 67 Report No.: HK1812101838E 8. Time Of Occupancy (Dwell Time) 8.1. Measurement Procedure The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Zero span, centered on a hopping channel. 2. RBW shall be≤channel spacing and where possible RBW should be set >> 1 / T, where T is the expected dwell time per channel. 3. Sweep: As necessary to capture the entire dwell time per hopping channel; where possible use a video trigger and trigger delay so that the transmitted signal starts a little to the right of the start of the plot. The trigger level might need slight adjustment to prevent triggering when the system hops on an adjacent channel; a second plot might be needed with a longer sweep time to show two successive hops on a channel. 4. Detector function: Peak. Trace: Max hold. 5. Use the marker-delta function to determine the transmit time per hop. 6. Repeat the measurement using a longer sweep time to determine the number of hops over the period specified in the requirements. The sweep time shall be equal to, or less than, the period specified in the requirements. Determine the number of hops over the sweep time and calculate the total number of hops in the period specified in the requirements, using the following equation: (Number of hops in the period specified in the requirements) = (number of hops on spectrum analyzer) × (period specified in the requirements / analyzer sweep time) 7. The average time of occupancy is calculated from the transmit time per hop multiplied by the number of hops in the period specified in the requirements. 8.2. Test Setup (Block Diagram of Configuration) Same as described in section 4.2 8.3. Limits and Measurement Result Time of Pulse Number of hops in the period Sweep Time Limit Channel for DH5 specified in the requirements (ms) (ms) (ms) Low 2.900 25*4 309.333 400 Middle 2.920 26*4 311.467 400 High 2.930 29*4 312.533 400 Note: The 8-DPSK modulation is the worst case and recorded in the report.

Page 50 of 67 Report No.: HK1812101838E TEST PLOT OF LOW CHANNEL

Page 51 of 67 Report No.: HK1812101838E TEST PLOT OF MIDDLE CHANNEL

Page 52 of 67 Report No.: HK1812101838E TEST PLOT OF HIGH CHANNEL

Page 53 of 67 Report No.: HK1812101838E 9. Frequency Separation 9.1. Measurement Procedure The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Wide enough to capture the peaks of two adjacent channels. 2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best identify the center of each individual channel. 3. Video (or average) bandwidth (VBW) ≥ RBW. 4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. 9.2. Test Setup (Block Diagram of Configuration) Same as described in section 4.2 9.3. Limits and Measurement Result CHANNEL LIMIT RESULT CHANNEL SEPARATION KHz KHz Pass CH01-CH02 1000 >=25 KHz or 2/3 20 dB BW TEST PLOT FOR FREQUENCY SEPARATION Note: The 8-DPSK modulation is the worst case and recorded in the report.

Page 54 of 67 Report No.: HK1812101838E 10. LINE CONDUCTED EMISSION TEST 10.1. LIMITS OF LINE CONDUCTED EMISSION TEST Maximum RF Line Voltage Frequency Q.P.( dBuV) Average( dBuV) 150kHz~500kHz 66-56 56-46 500kHz~5MHz 56 46 5MHz~30MHz 60 50 Note: 1. The lower limit shall apply at the transition frequency. 2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz. 10.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST

Page 55 of 67 Report No.: HK1812101838E 10.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user’s manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12 mm non-conductive covering to insulate the EUT from the ground plane. 2. Support equipment, if needed, was placed as per ANSI C63.10. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10. 4. All support equipments received AC120V/60Hz power from a LISN, if any. 5. The EUT received DC charging voltage by adapter which received 120V/60Hzpower by a LISN. 6. The test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. 9. The test mode(s) were scanned during the preliminary test. Then, the EUT configuration and cable configuration of the above highest emission level were recorded for reference of final testing. 10.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. EUT and support equipment was set up on the test bench as per step 2 of the preliminary test. 2. A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions. Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit. If EUT emission level was less –2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average detector. 3. The test data of the worst case condition(s) was reported on the Summary Data page.

Page 56 of 67 Report No.: HK1812101838E 10.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST By adapter (worst case) FOR BR/EDR Line Conducted Emission Test Line 1-L

Page 57 of 67 Report No.: HK1812101838E Line Conducted Emission Test Line 2-N

Page 58 of 67 Report No.: HK1812101838E 11. Test Setup Photos of the EUT FCC Line Conducted Emission Radiated Emission

Page 59 of 67 Report No.: HK1812101838E

Page 60 of 67 Report No.: HK1812101838E 12. Photograph of EUT TOP VIEW OF EUT BOTTOM VIEW OF EUT

Page 61 of 67 Report No.: HK1812101838E FRONT VIEW OF EUT BACK VIEW OF EUT

Page 62 of 67 Report No.: HK1812101838E LEFT VIEW OF EUT RIGHT VIEW OF EUT

Page 63 of 67 Report No.: HK1812101838E VIEW OF EUT (Port)-1 VIEW OF EUT (Port)-2

Page 64 of 67 Report No.: HK1812101838E OPEN VIEW-1 OF EUT OPEN VIEW-2 OF EUT

Page 65 of 67 Report No.: HK1812101838E VIEW OF BATTERY INTERNAL VIEW OF EUT-1

Page 66 of 67 Report No.: HK1812101838E INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3

Page 67 of 67 Report No.: HK1812101838E INTERNAL VIEW OF EUT-4 Antenna ----END OF REPORT----


Document Created: 2019-01-22 15:34:05
Document Modified: 2019-01-22 15:34:05
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