General Measurement Info Set Up and Calibration

FCC ID: OIIDTSA1900-2

Test Report

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FCCID_37317

Omnipoint Technologies, Inc. Exhibit 10 FCC ID: OIIDTSA1900-2 Page 1 of 3 EXHIBIT 10 GENERAL MEASUREMENT INFORMATION This exhibit describes the equipment used to perform the measurements required to obtain a Certification grant of equipment authorization, presents a general measurement set-up, and discusses the amplitude calibration performed to ensure accurate results, for measurements of RF output power, occupied bandwidth, conducted spurious emissions, and frequency stability. A description of the measurement of field strength of radiated emissions and equipment used is detailed in the test report attached as part of Exhibit 14. The primary equipment used for all but measurements of field strength of radiated emissions is described in the following list, while a tabular summary of all equipment, including serial numbers and calibration dates, is presented in Table E10.1: • HP437B Average Power Meter with HP8481A Power Sensor (for calibrations) • HP83752A Signal Generator (for calibrations) • HP8563E Spectrum Analyzer, with High Stability Time Base and Frequency Counter Options • Rhode & Schwarz CMD55 Digital Radio Communications Tester • Personal Computer (Dell) to acquire (using HP VEE), process and present results Table E10.1. Test equipment used to perform required measurements. Make Model Serial Number Asset Last Cal Cal Due HP 437B 3125U23748 A01583 31MAR99 31MAR00 HP 8563E 3626A05388 A01569 31MAR99 31MAR01 HP 83752A 3610A00851 A00679 25MAY98 25MAY99 FLUKE 79 61200710 A00160 30MAR99 30MAR00 FLUKE DAU 6623500 A01689 31MAR99 31MAR00 R&S CMD55 DE11400 A01276 22APR99 22APR00 HANSE TVC9 NA A01334 NA NA HANSE TEMP NA A01333 NA NA INMET 18S100W-20 20 dB NA NA NA ATTEN ARTSYN NFN40-7612 AC/DC NA NA NA SUPPLY POWERSTAT L2M226C VARIAC A09315 NA NA LAMBDA LLS7040 DC SUPPLY A00167 NA NA This document contains PROPRIETARY and CONFIDENTIAL information of Omnipoint Technologies, Inc.

Omnipoint Technologies, Inc. Exhibit 10 FCC ID: OIIDTSA1900-2 Page 2 of 3 General Measurement Set-up A composite equipment set-up used during measurements of RF output power, occupied bandwidth, conducted spurious emissions (and emissions bandwidth), and frequency stability is presented as Figure E10.1. The RF port of the DTSA is connected to either an HP8563E Spectrum Analyzer or a Rhode & Schwarz CMD55 Digital Radio Communications Tester. The 20 dB pad prevents the RF output from the DTSA from overloading the front-ends of either the HP8563E Spectrum Analyzer or Rhode & Schwarz CMD 55. Measurements of RF output power, occupied and emissions bandwidth, and conducted emissions were performed using the HP8563E. A second PC was used to configure and control the DTSA for all measurements (to select transmit channel, RF output power level, operating modes, and so forth). The Rhode & Schwarz CMD 55 was used to determine DTSA carrier frequency during frequency stability measurements. Also during frequency stability measurements, the DTSA was powered both by an Artesyn AC-to-DC power supply, which in turn was powered by a Powerstat variac, for variations in AC input, and a Lambda DC supply (not shown), for variations in DC input to the DTSA. AC IN Variac Frequency Stability Rhode & Schwarz CMD55 AC/DC Supply Redhawk DTSA 20 dB Attenuator Temperature Chamber HP8563E Spectrum Analyzer PC for EUT Control Figure E10.1. General Measurement Set-up (for all but radiated spurious emissions). This document contains PROPRIETARY and CONFIDENTIAL information of Omnipoint Technologies, Inc.

Omnipoint Technologies, Inc. Exhibit 10 FCC ID: OIIDTSA1900-2 Page 3 of 3 Amplitude Calibration of the Measurement System Because measurements of peak output power (§ 2.1046) and conducted spurious emissions (§ 2.1051) are made absolutely, characterization of diagnostic system signal path (cables, RF power splitter, and attenuator) loss between the RF output connector of the DTSA and the input port of the HP8563E Spectrum Analyzer is necessary prior to making these measurements. For output power measurements, this loss was characterized at the center frequency of each channel at which these measurements were made. In the case of conducted spurious emissions, losses were measured at the center of each span throughout the frequency ranges given in Table E10.2. Separate calibrations were performed for correcting measurements made beyond the lower and upper edge of each of the six PCS license blocks (A – F). Measured path loss data was stored and used to correct all subsequent output power and conducted spurious emissions measurements. Table E10.2. Diagnostic system loss measurements—frequency ranges and spans. Frequency Range Span 10 MHz – 1810 MHz 300 MHz 1810 MHz – 5 MHz below license lower edge 35 to 95 MHz (block dependent) 5 MHz below to 5 MHz beyond license edge 1 MHz 5 MHz beyond license edge – 2000 MHz 130 – 85 MHz (block dependent) 2000 MHz – 20 GHz 300 MHz This document contains PROPRIETARY and CONFIDENTIAL information of Omnipoint Technologies, Inc.


Document Created: 2001-06-25 16:45:02
Document Modified: 2001-06-25 16:45:02
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