WARNING:pdfminer.pdfpage:The PDF <_io.BufferedReader name='/Volumes/Scratch/Incoming/eg-scratch/6826994.pdf'> contains a metadata field indicating that it should not allow text extraction. Ignoring this field and proceeding. Use the check_extractable if you want to raise an error in this case Logitech Antenna Under Test (AUT) Report Report No.: EVT-700-006274 Model Name: YR0090 Equipment Type: Keyboard Manufacturer: Logitech Far East LTD. Test Location: E-2, No.1, Li Hsin 1st Road, Hsinchu Science Park, Hsinchu City, Taiwan Tested by: Ethan Hsu Report Date: 2023/06/16 Report No.: EVT-700-006274 Page 1 of 18 Report Release History Report version Description YR0090 AUT Report Original release Date Issued 2023/06/16 Table of Contents 1. EUT Antenna Information 2. Measured Values and Calculation of Antenna Gains 3. RF Conducted Power Measurement 3.1 Test Setup 3.2 Test Instruments 3.3 Test Procedure 3.4 Test Result of RF conducted Power 4. 2D Radiation Pattern Measurement 4.1 Test Location 4.2 Description of the anechoic chamber 4.3 Test Instruments 4.4 Test Procedure 4.5 Test Setup photos 4.6 2D Pattern Test Plot 3 3 4 4 4 5 5 6 6 6 7 8 9 10 Report No.: EVT-700-006274 Page 2 of 18 1. EUT Antenna Information 1) Antenna Materialexternal PCB with coaxial cable 2) Antenna TypePIFA 3) Antenna Dimension8.0 x 45.0 mm 4) Operating Frequency2.4 GHz - 2.4835 GHz 5) Input Impedance50 6) Standing-Wave Ratio2.3 2. Measured Values and Calculation of Antenna Gains Measure peak horizontal/vertical EIRP on each x-y, y-z, x-z plane. The highest measured values will be used to calculate the antenna peak gain. Antenna Peak Gain (dBi) = Max EIRP(dBm) - Conducted Power (dBm) X-Y Plane
=0~360, =90 X-Z Plane
=0, =0~360 Y-Z Plane
=90, =0~360 Ver. Peak EIRP
(dBm) Hori. Peak EIRP
(dBm)
-4.35 1.69
-3.86 3.60
-2.94 2.09 Ver. Peak EIRP
(dBm) 3.16 4.04 3.82 Hori. Peak EIRP
(dBm) 4.59 6.14 5.38 Ver. Peak EIRP
(dBm) Hori. Peak EIRP
(dBm) 3.17
-2.80 4.27
-1.34 3.66
-2.95 Frequency 2402 2440 2480 Max Peak EIRP
(dBm) Conducted Power
(dBm) Antenna Peak Gain
(dBi) 4.59 6.14 5.38 3.21 3.59 3.91 1.38 2.55 1.47 Test Date: 2023/06/08 Report No.: EVT-700-006274 Page 3 of 18 3. RF Conducted Power Measurement 3.1 Test Setup 3.2 Test Instruments Description Model No. Serial No. Last Calibration Power Meter Anritsu Pulse Power Sensor Anritsu Attenuator Keysight ML2495A 1529002 2022/6/22 MA2411B 1339443 2023/5/8 MDCS18N-10 MDCS18N-10-01 2022/4/5 Note: The calibration interval of the above test instruments is __12__ months Report No.: EVT-700-006274 Page 4 of 18 3.3 Test Procedure A spectrum analyzer or Power meter was used to perform output power measurement, setting the detector to average and configuring EUT continuously transmitting power(100% duty cycle). 3.4 Test Result of RF conducted Power Frequency
(MHz) 2402 2440 2480 Test Date: 2023/06/08 Measured Power
(dBm) 3.21 3.59 3.91 Report No.: EVT-700-006274 Page 5 of 18 4. 2D Radiation Pattern Measurement 4.1 Test Location 2D radiation pattern measurement in the anechoic chamber 4.2 Description of the anechoic chamber Anechoic Chamber Length: 10m Width: 5m Height: 5m Turntable height: 1.5m Measurement Antenna height: 1.5m 4.3 Test Instruments Description Model No. Serial No. Last Calibration Spectrum Analyzer Keysight Horn Antenna ETS Report No.: EVT-700-006274 N9030A MY54490520 2022/8/5 BBHA 9120 D 9120D-1479 2022/11/13 Page 6 of 18 Software Antenna Pattern V6.2-210118 N/A N/A Antenna Tower/
Turntable PSG analog signal generator (from 250 kHz to 50 GHz) Keysight MF-7802 MF780208542 N/A E8257D MY53401987 2022/6/21 RF Coaxial Cable SUCOFLEX104 RF104-215 2022/11/04 Note: The calibration interval of the above test instruments is __12__ months Report No.: EVT-700-006274 Page 7 of 18 4.4 Test Procedure i. ii. Connect the EUT to power meter and record the power setting of EUT and the measured conducted power. Fasten the EUT in the center of the turntable, record the coordinates and take pictures. Configuring EUT continuously transmitting (100% duty cycle). iii. iv. Make sure the transmit signal is stable and at the maximum RF power v. vi. level. Setup the channel power function by spectrum analyzer. Read the power level on the spectrum analyzer and record in the following positions. 1. The turntable is then stepped between 0 to 360 degrees along the horizontal plane in 1-degree increments. 2. Data is recorded using the spectrum analyzer for both theta and phi vii. viii. polarizations at each position. Rotate the EUT with 90 degrees and repeat step f.1 and step f.2 until all 3 planes(X-Y,X-Z,Y-Z) were measured. The substitution horn antenna is substituted for EUT at the same position and signals generator export the CW signal to the substitution antenna via a TX cable. Rotated the Turn Table and moved receiving antenna to find the maximum radiation power. Adjust output power level of S.G to get a Value of spectrum reading equal to Raw Value. Record the power level of S.G. EIRP = PSigGen + GT LC where:
PSigGen = power setting of the signal generator that produces the same received power reading as the DUT, in dBm;
GT = gain of the substitute antenna, in dBd (ERP) or dBi (EIRP);
LC = signal loss in the cable connecting the signal generator to the substitute antenna, in dB ix. Antenna Peak Gain (dBi) = Max EIRP(dBm) - Conducted Power (dBm) Report No.: EVT-700-006274 Page 8 of 18 4.5 Test Setup photos confidential Report No.: EVT-700-006274 Page 9 of 18 4.6 2D Pattern Test Plot X-Y Plane Report No.: EVT-700-006274 Page 10 of 18 Report No.: EVT-700-006274 Page 11 of 18 X-Z Plane Report No.: EVT-700-006274 Page 12 of 18 Report No.: EVT-700-006274 Page 13 of 18 Report No.: EVT-700-006274 Page 14 of 18 Y-Z Plane Report No.: EVT-700-006274 Page 15 of 18 Report No.: EVT-700-006274 Page 16 of 18 Report No.: EVT-700-006274 Page 17 of 18 Report No.: EVT-700-006274 Page 18 of 18