RF Test Requirements.docx

RF Test RequirementsTable of Contents1Introduction52RF Conductive Test Requirements52.1Output power62.1.1Test Items62.1.2Requirements62.2Phase/Frequency Error72.2.1Test Items72.2.2Requirements72.3Reception Sensitivity82.3.1Test Items82.3.2Requirements82.4ORFS due to Modulation92.4.1Test Items92.4.2Requirements92.5ORFS due to Switching102.5.1Test Items102.5.2Requirements103RF Wireless Test Requirements113.1Output power113.1.1Test Items113.1.2Requirements113.2Phase/Frequency Error113.2.1Test Items113.2.2Requirements123.3Reception Sensitivity123.3.1Test Items123.3.2Requirements124RF Calibration Requirements134.1AFC Parameters134.1.1AFC Algorithm134.2AGC Parameters144.2.1AGC Algorithm144.3APC Parameters154.3.1GSM Algorithm154.4ADC Parameters171 IntroductionThe RF Test Requirements are defined for verification of RF performance such that the product complies with the requirements defined in GSM standard. Two types of RF tests are performed during production.The first test is done in board level with cable connection to the radio tester (conductive test). This is done right after RF calibration procedure. This is to ensure the RF conductive performance complies with GSM standard. Note that due to time-consuming of the test procedure only critical items are tested.The second test is done in finish product level with wireless connection to the radio tester (wireless test). This is done after all board level tests are finished (including base band function test) and final assembly is completed. This is to ensure that the antenna is correctly assembled and the RF wireless performance is acceptable for a final product.In the following two sections the test requirements are listed. The requirements are defined with reference to GSM standard 05.05.The Calibration Parameters and Algorithms required are addressed in Chapter 4.2 RF Conductive Test RequirementsIn the following sub sections, the band denotation is listed below.BandNominal FrequencyChannel IndexGSM 900900 MHz975-1023, 0, 1-124DCS1800 MHz512-8852.1 Output powerTo verify if the product can output the desired power at given power levels and channels.2.1.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 900975, 62, 1225, 12, 19DCS512, 698, 8850, 7, 152.1.2 RequirementsGSM 900Power Level 5Power Level 12Power Level 19Upper bound33.0 dBm22.0 dBm8.0 dBmLower bound32.4dBm16.0 dBm2.0 dBmDCSPower Level 0Power Level 7Power Level 15Upper bound30.0 dBm19.0 dBm3.0 dBmLower bound29.4 dBm13.0 dBm-3.0 dBm2.2 Phase/Frequency ErrorTo verify that when the product outputs the desired power at given power levels and channels, the output phase error and frequency error is within given range.2.2.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 900975, 62, 1245, 19DCS512, 698, 8850, 152.2.2 RequirementsGSM 900Power Level 5Power Level 19Max RMS Phase Error55Max Peak Phase Error2020Max Frequency Error90 Hz90 HzDCSPower Level 0Power Level 15Max RMS Phase Error55Max Peak Phase Error2020Max Frequency Error180 Hz180 Hz2.3 Reception SensitivityTo verify that when the cell power is given at sensitivity level in different channels, the bit error rate of the received data is within given range.2.3.1 Test ItemsBandSelected ChannelsPower LevelCell PowerGSM 900975, 62, 1225=-106 dBmDCS512, 698, 8850=-105 dBm2.3.2 RequirementsBit Error Rate (BER) = measured value = -109.0 dBm in GSM band, 102.0dbm = measured value = -108.0 dBm in DCS band.2.4 ORFS due to ModulationTo verify that when the product outputs the desired power at given power levels and channels, the output spectrum modulation characteristic is within given specification.ORFS stands for “Output Radio Frequency Spectrum”.2.4.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 900625DCS69802.4.2 RequirementsSidebandFrequency100kHz200kHz250kHz400kHz600kHz800kHzLimitation0.5 dBc-30 dBc-33 dBc-60 dBc-60 dBc-60 dBcOr-36 dbm-36 dbm-36 dbm-36 dbm-36 dbm2.5 ORFS due to SwitchingTo verify that when the product outputs the desired power at given power levels and channels, the output spectrum switching characteristic is within given specification.2.5.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 900625DCS69802.5.2 RequirementsBandLevel400 kHz600 kHz1200 kHz1800 kHzGSM 9005-19.0 dBm-23.0 dBm-23.0 dBm-26.0 dBmBandLevel400 kHz600 kHz1200 kHz1800 kHzDCS0-22.0 dBm-24.0 dBm-24.0 dBm-27.0 dBm3 RF Wireless Test Requirements3.1 Output powerTo verify if the product can output the desired power at given power levels and channels.3.1.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 90065,9755DCS 512,70003.1.2 RequirementsGSM 900Power Level 5Upper bound37.0dBmExpected Power33.0 dBmLower bound29.0 dBmDCSPower Level 0Upper bound36.0dBmExpected Power29.0 dBmLower bound22.0 dBm3.2 Phase/Frequency ErrorTo verify that when the product outputs the desired power at given power levels and channels, the output phase error and frequency error is within given range.3.2.1 Test ItemsBandSelected ChannelsSelected Power LevelsGSM 90065,9755DCS512,70003.2.2 RequirementsGSM 900Power Level 5Max RMS Phase Error5Max Peak Phase Error20Max Frequency Error90 HzDCSPower Level 0Max RMS Phase Error5Max Peak Phase Error20Max Frequency Error180 Hz3.3 Reception SensitivityTo verify that when the cell power is given at sensitivity level in different channels, the bit error rate of the received data is within given range.3.3.1 Test ItemsBandSelected ChannelsPower LevelCell PowerGSM 90065,9755=-102 dBmGSM 900512,7000=-102 dBm3.3.2 RequirementsBit Error Rate (BER) = measured value = -105.0 dBm4 RF Calibration Requirements4.1 AFC Parameters- Automatic Frequency Control- The AFC calibration is using two AFC DAC values to find the slope K and the intercept INI_DAC. Moreover, the calibration is completed if the frequency error FE included in INI_DAC is with +/- 30.- The better AFC_DAC value between AFC_DAC1 and AFC_DAC2 is chosen to linearly approach again with INI_DAC gotten last time and then obtain new result, K and INI_DAC.4.1.1 AFC AlgorithmBandGSMTestSetLevelDb-60.0BCH65InitialDac11500InitialDac22500InitialGain40 4.2 AGC Parameters- Automatic Gain Control- The software constant Gmagic needs to be calibrated for the receiver output power to be exactly fixed at the well level.- Select a standard channel and 12 others to find Gmagic and Gmagic (Gmagic = Standard Gmagic Gmagic of other channel )4.2.1 AGC AlgorithmGSMTestSetLevelDb-60BCH62InitialGain50GMagicUpLimit200GMagicDnLimit180PmUpLimit50.0PmDnLimit30.0AdaptFactor1.0CompensateChannels1,17,33,49,65,81,97,113,975,991,1007,1023DCSTestSetLevelDb-60BCH698InitialGain50GMagicUpLimit200GMagicDnLimit180PmUpLimit50.0PmDnLimit30.0AdaptFactor1.0CompensateChannels512,544,576,608,640,672,704,736,768,800,832,864,8854.3 APC Parameters- Automatic power control- The TX power level needs to be calibrated in order to achieve the required accuracy. Updating APC_DAC registers value could change the transmitted power, so optimum APC_DAC registers, leading according accurate output power, should be calibrated in every power level.- The APC compensation concept is the equivalent to AGC calibration. Moreover, APC_DAC will vary with different level, so 3 levels (High, Mid, Low) are chosen to calculate APC_DAC.4.3.1 GSM AlgorithmGSMTCH 62Power LevelHigh LimitTargetLow Limit532.532.432.3631.33130.7729.32928.7827.32726.7925.32524.71023.32322.71121.32120.71219.31918.71317.31716.71415.31514.71513.31312.71611.31110.7179.598.5187.376.7195.354.7Compensate ChannelsHiPowerMidPower LowPower Power Level 7Power Level 12Power Level