510101970sAnnexesA3GPP协议.docx

1、510101970sAnnexesA3GPP协议Annex 1 (normative):Reference test methodsA1.1 General Conditions (GC)A1.1.1 Outdoor test site and general arrangements for measurements involving the use of radiated fields (GC4)The outdoor test site shall be on a reasonably level surface or ground. At one point on the site

2、a ground plane of at least 5 m diameter shall be provided. In the middle of this ground plane a non-conducting support capable of rotation through 360 degrees in the horizontal plane shall be used to support the test sample at 1,5 m above the ground plane.The test site shall be large enough to allow

3、 the erection of a measuring or transmitting antenna at a distance of half a wavelength or at least 3 m whichever is the greater. Sufficient precautions shall be taken to ensure that reflections from extraneous objects adjacent to the site and ground reflections do not degrade the measurement result

4、s.The test antenna is used to detect the radiation from both the test sample and the substitution antenna, when the site is used for radiation measurements. Where necessary the substitution antenna is used as a transmitting antenna, when the site is used for the measurement of receiver characteristi

5、cs. This antenna is mounted on a support such as to allow the antenna to be used in either the horizontal or vertical polarization and for the height of its centre above ground to be varied over the range 1 m to 4 m. Preferably test antennas with pronounced directivity should be used. The size of th

6、e test antenna along the measurement axis shall not exceed 20% of the measuring distance.For radiation measurements the test antenna is connected to a test receiver capable of being tuned to any frequency under investigation and of measuring accurately the relative levels of signals at its input. Wh

7、en necessary (for receiver measurements) the test receiver is replaced by a signal source.The substitution antenna shall be a half wave dipole, resonant at the frequency under consideration, or a shortened dipole, or (in the range 1 GHz to 4 GHz) a horn radiator. Antennas other than a half wave dipo

8、le shall have been calibrated to the half wave dipole. The centre of this antenna shall coincide with the reference point of the test sample it has replaced. This reference point shall be the volume centre of the sample when its antenna is mounted inside the cabinet, or the point where an external a

9、ntenna is connected to the cabinet. The distance between the lower extremity of the dipole and the ground shall be at least 30cm.The substitution antenna shall be connected to a calibrated signal generator when the site is used for radiation measurements and to a calibrated measuring receiver when t

10、he site is used for measurements of receiver characteristics. The signal generator and the receiver shall be operating at the frequencies under investigation and shall be connected to the antenna through suitable matching and balancing network.A1.1.2 Anechoic shielded chamber (GC5)As an alternative

11、to the above mentioned outdoor test site an indoor test site, being a well shielded anechoic chamber simulating free space environment may be used. If such a chamber is used, this shall be recorded in the test report.NOTE: The anechoic shielded chamber is the preferred test site for testing to the p

12、resent document.The measurement site may be an electrically shielded anechoic chamber being 10 m long, 5 m broad and 5 m high. Walls and ceiling should be coated with RF absorbers of 1 m height. The ground should be covered with absorbing material 1 m thick able to carry test equipment and operators

13、. A measuring distance of 3 m to 5 m in the long middle axis of the chamber can be used for measurements up to at least 10 GHz.The test antenna, test receiver, substitution antenna and calibrated signal generator are used in a way similar to that of the outdoor test site method with the exception th

14、at, because the floor absorbers reject floor reflections, the antenna height need not be changed and shall be at the same height as the test sample. In the range between 30 MHz and 100MHz some additional calibration may be necessary.A1.1.3 Temporary antenna connector (GC7)If the MS to be tested does

15、 not normally have a permanent external 50 connector then for test purposes only it may be modified to fit a temporary 50 antenna connector.The permanent integral antenna shall be used for measurement of:- Transmitter effective radiated power (subclause 13.3).- Radiated spurious emissions (clause 12

16、).For tests in the relevant MS Receive band:- The temporary antenna coupling factor is determined using the procedure defined in annex 1, subclause 1.1.5. When using the temporary antenna connector, the temporary antenna coupling factor needs to be taken into consideration when determining a stimulu

17、s or measured level in the receive band.For tests in the relevant MS Transmit band:- The temporary antenna coupling factor is determined using the procedure defined in subclause 13.3.4.2 When using the temporary antenna connector, the temporary antenna coupling factor needs to be taken into consider

18、ation when determining a stimulus or measured level in the transmit band.For frequencies outside the above mentioned relevant bands the temporary antenna coupling factor is assumed to be 0dB.NOTE 1: The uncertainty in the determined value of the temporary antenna coupling factor is directly related

19、to the uncertainty of the field strength value measured in subclause 13.3.4.2 step n) and annex 1, subclause1.1.5.2 (approximately 3 dB). By mutual agreement, between the MS manufacturer and the testing authority, a value of 0 dB for the temporary antenna coupling factor could be used.NOTE 2: The ac

20、commodation of the uncertainty in the temporary antenna coupling factor in the relevant MS receive band for the tests in clause 14 is for further study.NOTE 3: The uncertainty in the temporary antenna coupling factor in the relevant MS transmit band can be accommodated with appropriate adjustment of

21、 the measured levels by the uncertainty.Testing must be performed in the following order to ensure that all the free field measurements are performed before the MS is modified.- Subclause 12.1.2.- Annex 1, subclauses 1.1.5.1 and 1.1.5.2.- Subclause 13.3.4.2 (during this step the MS is modified).- An

22、nex 1, subclause 1.1.5.3.- All remaining tests of clauses 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 and 22.A1.1.4 Temporary antenna connector characteristicsThe method of connection of the temporary connector shall allow secure and repeatable connections to be made to the device under test.The antenna

23、connector shall present a nominal 50 impedance over the GSM receive and transmit frequency ranges. The maximum loss within the frequency range 100 kHz to 12,75 GHz shall be less than 1 dB.The connection circuitry shall be maximally broadband and shall contain no non-linear or active devices.The char

24、acteristics of the connector shall not be significantly affected by temperatures in the range -25 to +60 Celsius.A1.1.5 Calibration of the temporary antenna connectorFor equipments fitted with an integral antenna and not provided with a permanent means for connection to an external antenna a calibra

25、tion procedure is required to allow subsequent measurements to be performed on the temporary antenna connector.Once calibrated this temporary antenna connector enables all receiver test procedures to be identical for equipments with an integral antenna and for equipments with an antenna connector.Th

26、e calibration procedure shall be carried out at three frequencies, namely an ARFCN in the low mid and high ARFCN ranges. The procedure consists of three distinct stages as follows:1) Establish the MS antenna radiation pattern for the three selected frequencies.2) Calibrate the test range (or anechoi

27、c shielded chamber) for the conditions needed in 1).3) Determine the temporary antenna connector coupling factor.A1.1.5.1 Antenna radiation patterna) The MS shall be in the anechoic shielded chamber, or on an outdoor test site, on an isolated support in a vertical position at an orientation specifie

28、d by the manufacturer. This position is the 0 position. A test antenna, connected to the SS shall be in the anechoic shielded chamber, or on the outdoor test site, at a distance of at least 3 m from the MS.b) A call shall be originated by the SS to the MS on a frequency in the low ARFCN range. The M

29、S shall be made to answer the call. The SS shall command the MS to maximum transmit power.c) The SS shall, using estimated parameters for the outdoor test site or anechoic shielded chamber, set its output level E see figure A1-1 to give an MS receiver input level of approximately 32dBVemf. This corr

30、esponds to a field strength of 55,5 dBV/m at the MS position. The signal shall be the Standard Test Signal C1.NOTE 1: The absolute value of the received signal level is not critical. The value suggested however will ensure that the MS receiver is operating essentially error free, yet is low enough t

31、o avoid any non linear effects in the receiver.d) The SS shall use the RXLEV message from the MS to determine a measure of the received field strength. The procedure detailed in the flow chart of figure A1-1 shall now be followed.Figure A1-1 The signal level from the SS that just results in the tran

32、sition from RXLEVa to RXLEVb shall be recorded as Ei.NOTE 2: The actual values of RXLEVa and RXLEVb will need to be recorded, because this transition will be used as the reference point for all further stages of the calibration procedure.e) Step d) shall be repeated after the MS has been rotated by n 45 in the horizontal plane. Ensuring that the same RXLEV transition is used, the signal levels from the SS shall be recorded as Ein.f) Calculate the effective mean signal level from the RMS value of the eight signal levels obtained in d) and e) above by usin