KINAIRPRO-SEData modem

Date: Tue, 7 Jul 1998 13:54:53 -0400 From: [email protected] (OET) To: [email protected] Subject: ADDITIONAL INFORMATION ON FCC ID: KINAIRPRO-SE [Correspondance ID: 1735] ONLY RESPOND ELECTRONICALLY TO ANSWER ALL OF THE FOLLOWING ITEMS. DO NOT SUBMIT A PARTIAL RESPONSE ELECTRONICALLY. PARTIAL RESPONSES MUST BE SEND VIA STANDARD METHODS LIKE FAX, EMAIL OR MESSENGER SERVICE. YOUR COOPERATION IS APPRECIATED. 1. This application is for 4 different transmitters. They operate with two different modulation schemes, different maximum output powers and over slightly different operating frequency ranges. In my opinion, two separate applications should have been filed for these transmitters, one for the Airpro models 19.2 and 64 and one for the Airpro models 128 and 256. Nevertheless, I will authorize them under the same FCC ID number (THIS TIME ONLY) but I need to see test data for all models in all modes of operation. The following were not provided: (a) Minimum bandwidth plots for the Airpro models 19.2, 64, and 128 (Only plots for the 256 were provided. Be sure these plots show compliance with the requirement to be 20 dB down at the bandedge), SEE PLOTS LABELED 6dB SUBMITTED 22 JULY (b) Antenna conducted plots for the Airpro models 64, and 128 (Only plots for the 19.2 and 256 were provided), SEE PLOTS LABELED ANT SUBMITTED 22 JULY (c) Power spectral density measurements for the Airpro models 19.2, 64, and 128, (Only plots for the 256 were provided) SEE PLOTS LABELED PSD SUBMITTED 22 JULY (d) Processing gain measurements for one of the modulation schemes (BPSK and MSK modulation is used but only one set of processing gain results were provided and they were not identified), The Processing Gain document which accompanied the AIRPRO-SE document included measurements for a BPSK radio. However, there is no difference between MSK vs BPSK in the final analysis, since the processing gain baseline performance for both is 10 ̄4. The result of 12.8 dB for the processing gain is based on a non-coherent receiver. (e) AC line conducted test results for the Airpro models 19.2, 64, 128 and 256 (None were provided). SEE PLOTS LABELED AC SUBMITTED 22 JULY 2. For the processing gain test results provided, the S/N value of 12.8 dB seems too high for BPSK modulation @ a BER of 10 to the -4 power. Please justify it. My standard curves for BPSK and MSK modulation show a S/N value of 8.8 dB. Please refer to documents process1.jpg through process3.jpg submitted on 11 July 1998. The charts are for both coherent and noncoherent receivers. The figure of 8.8 dB with a given S/N of 10 ̄4, is for a coherent receiver. The chart clearly demonstrates and supports our measurements that a noncoherent receiver is capable of a S/N of 12.3. (I believe the 12.8 dB figure quoted in your question is the processing gain.) 3. Please justify your duty cycle correction factor of -8 dB used on the radiated emissions test results. This transmitter operates in full duplex mode, i.e., a duty cycle correction of - 6 dB. Where's the extra 2 dB? THE TRANSMITTER TIMING IS NOT QUITE SYMMETRICAL, TO ALLOW FOR PATH DELAY AND RX/TX DELAY IN REMOTE UNIT. ON TIME = 3.4 MS, PULSE TRAIN = 8.5 MS, DF = -8dB. SEE CHARTS LABELED DUTYON.JPG AND PLSTRAIN.JPG SUBMITTED 22 JULY 4. Provide a copy of the installation instructions that will be provided to the professional installer that notifies him when the output power of this transmitter must be reduced below the maximum output power level. I see no idication in the theory of operation that this is automatically performed by software in the transmitter. SEE WORD DOCUMENT CALLED AIRAMMEND.DOC SUBMITTED 22 JULY 5. Please address Section 15.247(b)(4) and the operation of this transmitter in a manner that ensures the Commission's RF safety guidelines will be met. Specific installation instructions for each type of antenna may be provided as indicated in Section 3 of Supplement C to OET Bulletin 65. Supplement C may be obtained from our website at www.fcc.gov/oet/info/documents. SEE WORD DOCUMENT CALLED AIRAMMEND.DOC SUBMITTED 22 JULY

PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 1 of 32 pages Thomas N. CokeniasEMC/RFI Specialist Test & Consulting Services for Commercial, Military, International Compliance P.O. Box 50128 Palo Alto, CA94303 CERTIFICATION TEST REPORT FOR A 2400-2483.5 MHz DSSS TRANSCEIVER Applicant: P-COM INC FCC ID:KINAIRPRO-SE Operating Frequency:2401.869 - 2481.476 MHz RF Output Power:0-28 dBm FCC Rule Part:15.247 Used For:Data link Power Source:120 AC Test Location:Compliance Consulting Services 951F Monterey Road Morgan Hill, CA 95087 All tests were performed by me or under my supervision. The AIRPRO-SE meets all emissions and modulation requirements specified under Parts 2 and 15 of the Commission’s Rules, as well as those specified in RSS 139, RSS-210 and RSP-100 for operation in Canada. THOMAS N. COKENIAS23 April 1998 PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 2 of 32 pages EXHIBITS EXHIBIT A: Test Configurations and Rationale EXHIBIT B: Circuit Information (Confidentiality Requested per Rule section 0.459) B1: Schematics B2: Block Diagrams B3: Theory of Operation EXHIBIT C: Product Photographs EXHIBIT D: User Manual and FCC ID Label EXHIBIT E: Channel Frequency Assignment List EXHIBIT F: Description of Antennas and Antenna Connector Per 15.203 EXHIBIT G: Report of Measurements PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 3 of 32 pages EXHIBIT A:Test Configurations and Rationale PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 4 of 32 pages TEST CONFIGURATIONS AND RATIONALE Applicant: P-COM INC Inc Product Description: 2400-2483.5 MHz DSSS Full Duplex Data Transceiver FCC ID: KINAIRPRO-SE The radio is available in 4 different data rate versions: 19.2, 64, 128, and 256 kB/sec Test Samples Profile Serial No:➨ ➨➨ ➨FCC#2ALP#4ALP#9ALP#5 Data rate, kBs/sec19.264128256 Radio m/n16053-011-0116053-021-0116053-030-0116053-040-01 Digital board m/n16066-010-0316066-020-0316066-020-0316066-020-03 Mother board m/n14002-010-0514002-020-0514008-030-0514008-040-05 RF Section m/n14319-211-0114319-221-0114319-230-0114319-240-01 TXCVR board m/n1400-121-0614000-121-0616105-030-0114000-040-06 Modulation typeMSKMSKBPSKBPSK Max Power@ Max allowed PSD24 dBm26 dBm28 dBm28 dBm Lowest allowed fo, P dBm2401.868 MHz 24 dBm 2404.468 MHz 26 dBm 2407.067 MHz 27 dBm 2411.446 MHz 25 dBm Highest allowed fo, P dBm2481.476 MHz 23 dBm 2479.851 MHz 3 dBm 2472.053 MHz 25 dBm 2472.107 MHz 9 dBm Digital clock frequency (MHz)16.670, 13.056, 4.352 16.670,32.256, 43.008 16.670,32.256, 43.008 16.70,32.256, 43.008 The maximum allowed output power depended on data rate and antenna type being used. Limiting factors were power spectral density (PSD) at a given output power setting, on antenna gain, and on the amplitude of emission bandedge energy in restricted bands starting at 2483.5 MHz and 2390 MHz. Tests were performed using the following antennas: Antenna TypeManufacturer & ModelGain short whipP-COM Inc0 dBi omni rodDecibel DA9065-NT8 dBi yagiCushcraft15 dBi dish reflectorConifer T2400C24 dBi PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 5 of 32 pages SUMMARY OF ALLOWED TRANSMITTER SETTINGS Data Rate: 19.2 kB/s Frequency/Channel Maximum Ouput Power (MHz, Plan, Channel) 0 dBi8 dBi15 dBi24 dBi 2401.868, P3, C1 (lowest)24 dBm24 dBm24 dBm24 dBm 2478.227, P3, C4823 dBm23 dBm15 dBm5 dBm 2479.851,P3, C4923 dBm8 dBm0 dBmnot used 2481.476,P3, C50 (highest)23 dBm0 dBmnot usednot used All others not listed23 dBm23 dBm23 dBm23 dBm Data Rate: 64 kB/s Frequency/Channel Maximum Ouput Power (MHz, Plan, Channel) 0 dBi8 dBi15 dBi24 dBi 2404.468, P2, C1 (lowest)26 dBm26 dBm26 dBm24 dBm 2474.652, P1, C1425 dBm25 dBm25 dBm23 dBm 2478.552, P2, C2016 dBm0 dBmnot usednot used 2479.851,P3, C49 (highest) 3 dBm8 dBm0 dBmnot used All others not listed25 dBm25 dBm25 dBm25 dBm Data Rate: 128 kB/s Frequency/Channel Maximum Ouput Power (MHz, Plan, Channel) 0 dBi8 dBi15 dBi24 dBi 2407.067, P1, C1 (lowest)27 dBm26 dBm26 dBm24 dBm 2472.053, P3, C7 (highest)25 dBm25 dBm23 dBm15 dBm All others not listed28 dBm28 dBm27 dBm24 dBm Data Rate: 256 kB/s Frequency/Channel Maximum Ouput Power (MHz, Plan, Channel) 0 dBi8 dBi15 dBi24 dBi 2411.446,P1, C1 (lowest)25 dBm23 dBm23 dBm 8 dBm 2461.476, P1, C626 dBm26 dBm23 dBm17 dBm 2472.107, P3, C4 (highest) 8 dBmnot usednot usednot used All others not listed28 dBm28 dBm27 dBm24 dBm These radios are all professionally installed and maintained, they are not sold to the general public or to hobbyists. PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 6 of 32 pages EXHIBIT B:Circuit Information (Confidentiality Requested) B1: Schematics B2: Block Diagrams B3: Theory of Operation PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 7 of 32 pages B1: Schematics PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 8 of 32 pages B2: Block Diagrams PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 9 of 32 pages EXHIBIT C:Theory of Operation PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 10 of 32 pages EXHIBIT C:Product Photographs PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 650-726-1263 fax: 650-726-1252 internet: [email protected] page 11 of 32 pages EXHIBIT D:User Manual and FCC ID Label PCOM Inc.FCC ID: KINAIRPRO-SE AirPro 19.2/64/128/256 tel: 6…

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