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Intertek Testing Services ETL SEMKO FCC ID. : M4Y-08150 Report No.: EME-010945 Page 1 of 22 EMC TEST REPORT Report No.: EME-010945 Model No.: XI-815 Issued Date: Nov. 28, 2001 Applicant: Z-COM, Inc. 7F-2, No.9, Prosperity 1St RD., Science-Based Industrial Park, Hsinchu, Taiwan R.O.C. Test By: Intertek Testing Services Taiwan Ltd. No. 11, Ko-Tze-Nan Chia-Tung Li, Shiang-Shan District, Hsinchu, Taiwan, R.O.C. This test report consists of 27 pages in total. It may be duplicated completely for legal use with the allowance of the applicant. It shall not be reproduced except in full, without the written approval of ITS Laboratory. The test result in this report only applies to the tested sample. Test Engineer Approved By Kaysi Chen Intertek Testing Services ETL SEMKO FCC ID. : M4Y-08150 Report No.: EME-010945 Page 2 of 22 Table of Contents 1. General information................................................................................................... 3 1.1 Identification of the EUT........................................................................................ 3 1.2 Additional information about the EUT................................................................... 3 1.3 Peripherals equipment............................................................................................. 3 2. Test specifications........................................................................................................ 4 2.1 Test standard........................................................................................................... 4 2.2 Operation mode....................................................................................................... 4 2.3 Modifications required for compliance................................................................... 4 2.4 Test equipment........................................................................................................ 5 3. Modulated bandwidth test......................................................................................... 6 3.1 Operating environment........................................................................................... 6 3.2 Test setup & procedure........................................................................................... 6 3.3 Measured data of modulated bandwidth test results............................................... 6 4. Peak power output test............................................................................................... 7 4.1 Operating environment........................................................................................... 7 4.2 Test setup & procedure........................................................................................... 7 4.3 Measured data of peak power output test results.................................................... 7 5. Antenna conducted spurious emission test............................................................... 8 5.1 Operating environment........................................................................................... 8 5.2 Test setup & procedure........................................................................................... 8 5.3 Measured data of the highest conducted spurious emission test result................... 8 6. Radiated spurious emission test................................................................................. 9 6.1 Operating environment........................................................................................... 9 6.2 Test setup & procedure........................................................................................... 9 6.3 Emission limits..................................................................................................... 10 6.4 Radiated spurious emission test data.................................................................... 11 6.4.1 Measurement results: frequencies equal to or less than 1 GHz......................... 11 6.4.2 Measurement results: frequency above 1GHz................................................... 12 7. Power spectral density test....................................................................................... 18 7.1 Operating environment......................................................................................... 18 7.2 Test setup & procedure......................................................................................... 18 7.3 Measured data of power spectral density test results............................................ 18 8. Emission on the band edge §FCC 15.247(C).......................................................... 19 9. RF Exposure calculations......................................................................................... 20 10. AC Line conducted emission §FCC 15.207........................................................... 21 10.1 Operating environment....................................................................................... 21 10.2 Test setup & procedure....................................................................................... 21 10.3 Conducted emission data.................................................................................... 22 Intertek Testing Services ETL SEMKO FCC ID. : M4Y-08150 Report No.: EME-010945 Page 3 of 22 1. General information 1.1 Identification of the EUT Manufacturer: Z-COM, Inc. Product: 2.4GHz Compact Flash Card Model No.: XI-815 FCC ID.: M4Y-08150 Frequency Range: 2412~2462 MHz Channel Number: 11 Channels Frequency of Each Channel : 2412MHz, 2417MHz, 2422MHz, 2427MHz, 2432MHz, 2437MHz, 2442MHz, 2447MHz, 2452MHz, 2457MHz, 2462MHz Type of Modulation: CCK (11Mps, 5.5Mbps), DQPSK (2Mbps), DBPSK (1Mbps) Power Supply: 3.3/5Vdc Power Cord: N/A Sample Received: Nov. 20, 2001 Test Date(s): Nov. 22, 2001 to Nov. 27, 2001 A DOC report has been generated for the client. 1.2 Additional information about the EUT The EUT is11Mbps IEEE 802.11b Wireless LAN Compact Flash…

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1 Processing Gain of Direct Sequence Spread Spectrum Product name: XI815 Wireless LAN Compact Flash Adapter Tested by: Zcom, Inc. Prepared by: Daniel Teng, Supervisor of Hardware department TEL: (886)-3-3577364 ext.147 FAX: (886)-3-5639241 Email: [email protected] Date: November 26, 2001 FCC requirements : The processing gain of a direct sequence system shall be at least 10dB. The processing gain shall be determined from the ratio in dB of the signal-to- noise ratio with the system spreading code turned off to the signal-to- noise ratio with the system spreading code turned on, as measured at the demodulated output of the receiver. This document contains theoretical calculation and test setup, procedure, measurement data and report. Test equipment: R&S FSEM20 spectrum analyzer R&S SMIQ03B signal generator Giga-tronics 8541C universal power meter Hp8496B attenuator/110dB with 10dB step Hp8494B attenuator/11dB with 1dB step Hp11636BB power splitter Notebook/PC X2 Theoretical calculation: The Processing gain is related to be jamming margin as follows: Where BER reference is the reference bit error ratio with its corresponding, theoretical output signal to noise ratio per symbol, (S/N) output , (J/S) is the jamming margin(jamming signal power relative to desired signal power), and L sys is the system losses. For 5.5Mbps and 11Mbps case: The HFA3861B direct sequence spread spectrum baseband processor use CCK modulation which is a form of M-ary Orthogonal Keying. The Probability of error for generalized M-ary orthogonal signaling using coherent demodulation is given by: 2 T he FER performance curve is derived by [1] as left graph: Therefore: Gp = (Es/No)o + (J/S) + Lsys =16.4 + 2.0 + (J/S) and, Gp = 18.4 + (J/S) must be greater than 10dB For the case of the HFA3861B, the bit rates are 1,2, 5.5 and 11Mbps. The corresponding symbol rates are 1, 1, 1.375 and 1.375 Msps. The chip rate is always 11Mcps, so the ratio of chip rate to symbol rate is 11:1 for the 1, 2Mbps and 8:1 for 5.5, 11Mbps rates. Since the symbol rate to bit rate is less than 10 for the higher rates, we supply the theoretical processing gain and coding are utilized. This is a reasonable in that they cannot be separated in the demodulation process. If a separable FEC coding scheme were used, we would not be comfortable making this assertion. As can be seen from the curve of figure 1, the Es/No is 16.4dB at the PER of 8%. It is well know that the Eb/No of BPSK is 9.6dB for 1e-5 BER, so therefore the coding gain of CCK over BPSK is 2.2dB. We add this to the processing gain of 9B to get 11.2dB overall processing gain for the CW jamming test. Taking the calculation above, if the (J/S)>-8.4dB then the equipment passes the CW jamming test. For 1 and 2Mbps case, the modulation is either DBPSK or DQPSK for 1 and 2Mbps. With differential coding, there is an error extension factor of 2 which comes from the fact that if one symbol is error, then the next will be demodulated in error too. Since its phase is dependant on the change of phase from symbol to symbol. In DBPSK, this result is a simple factor of two in BER. With DQPSK, the picture is a little muddied in that a symbol error may cause one or two bit errors since two bits are carried per symbol. From the book of Fig.7.2, Viterbi, A.J. Principles of Coherent Communications, Page 192 (New York; McGraw-Hill, 1996), the Eb/No of BPSK is 9.6dB. When operating DQPSK at 2Mbps, the Eb/No remains essentially the same, but the Es/No goes up by 3dB. So the (S/N)o is 12.6. Test procedure: Obtain the simplex link shown. Perform all independent instrumentation calibration 15.51616.517 10 -2 10 -1 10 0 11 Mbps CCK in Thermal Noise Es/No (dB) 1000 byte Packet Error Rate 3 prior to this procedure. Set operating levels using fixed and variable attenuator in system to meet the following objectives: 1. Signal Power at receiver is approximately –60dBm. 2. Signal Power at power meter between –20 and –30dBm. 3. Use spectrum analyzer to monitor test. 4. Ensure that CW jammer generator RF output is disabled and measure the power at the power meter port using Giga-tronics 8541C power meter. This is relative power, Sr. 5. Disable TX and set CW jammer output frequency equal to the carrier frequency and enable generator output. Set reference CW jammer power level at power meter port 8.4dB below Sr. 6. Disable CW jammer and re-establish Link. FER test should be essentially error free. 7. Enable the CW jammer at the reference power level and verify that FER at the reference power level and verify that FER test indicate less than 8%. 8. Alternatively, adjust the CW jammer level to that which causes 8% FER. 9. Repeat Step 7 for uniform steps in frequency increments of 50KHz across the receiver passband with the CW jammer. In this case, the receiver passband is
8.5MHz Test setup: as shown at next page Processing gain test result summary: Frequency channelFrequencyData rate (Mbps)Gp (dB) 12412MHz1110.7 62437MHz1110.5 112462MHz1110.5 Reference [1]. Intersil processing gain test document (Attached file). Notebook Access Point Power Combiner SG R&S ¢á¢Û IQ03 PC CF XI800 Step Attenuator(30dB)Power Splitter Power splitter Spectrum analyzer R&S SFEM20 Power meter Gigatronic 8541C Shielding room 20dB Attenuator Processing gain test setup 4 11Mbps Channel 1 Processing Gain Gp=(S/N)o+Mj+Lsys Freq. (MHz) Gp (dB) (S/N)o (dB) Mj = J/S (dB) Lsys (dB) Jammer (dBm) Lvl (dBm) FER                                                                                             6.8                                           …

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Radiated emission configuration photograph ( frequencies equal to or less than 1 GHz) AC Line conducted emission configuration photograph