Nti-audio XL2 Sound Level Meter User Manual

OPERATING MANUALHANDHELD AUDIO AND ACOUSTIC ANALYZERXL2

10Overview1/12 Oct + Tol: • The limit button lights up green for results within tolerance and red for out of tolerance results.5Pause Pauses the curr

1001/12 Octave + Tolerance9 Preset Measurement Time Adjustment of preset measurement time for single timer setting.10Broadband ResultsUser-selec

1011/12 Octave + Tolerance13Phantom Power Supply48V The XL2 provides 48 V phantom power supply to the microphone or sensor.ASD An NTi Audio measuremen

1021/12 Octave + Tolerance1/12 Octave - Getting StartedTest PreparationsThe XL2 reads the electronic data sheet of any connected ASD micropho

1031/12 Octave + ToleranceSelect Upper/Lower Reading The pop-up window Select reading shows up.Select the time-averaged sound level • EQ. All avail

1041/12 Octave + ToleranceSelect Input RangeSelect the lowest possible input range according to the maxi-mum level expected during the measurement.Sel

1051/12 Octave + ToleranceSave the Measurement ResultSelect the memory menu • with the rotary wheel and confirm with enter .The memory menu opens

106Noise CurvesNoise Curves (optional)The Spectral Limits Option extends the XL2 with the Noise Curves measurement function. A noise curve ma

107Noise CurvesRoom Noise Criteria RNC(in accordance with ANSI S12.2-2008)The RNC method is used to determine noise ratings when the noise fr

108Noise CurvesPreferred Noise Criteria PNC(in accordance with ASA 1971)PNC curves represent a more stringent method based on an extension of the basi

109Noise CurvesRNC Information Page1314The RNC information page is available at the noise curve types Noise Criteria and Room Noise Criteria in

11OverviewThe Screen DisplayThe XL2 displays the actual sound levels also in case of no measurement has been started. Any displayed average

110Noise Curves3Y-Scale settingAuto-Scroll •Zoom:•Select the Y-Axis with the rotary wheel - and confirm with enter .Select the zoom factor between

111Noise Curves9Actual Measurement TimeCounts actual measurement time in hrs:min:sec. Supports time modes: continuous and single. Timer Mode Continuou

112Noise Curves12 SIL Measurement ResultThe speech interference level (SIL) result is shown at noise curve types NC-2008 and NC-1995 1. It is calc

113Noise CurvesRecommendations Type of Room - Space TypeRecom-mended NC and RNC CurveEquivalent Sound LevelRC curveConcert halls 15-18 - -Small audit

114Noise CurvesNoise Curves - Getting StartedTest PreparationsThe XL2 reads the electronic data sheet of any connected ASD microphones provid

115Noise CurvesStart and Stop the MeasurementPress start • . The run indication switches to running . The actual noise level LZeq of the selec

116STIPASpeech Intelligibility STIPA (optional)The STIPA analyzer option allows reliable measurement of the speech transmission index withi

117STIPASTIPA Numeric Result Page12345910678 Use only the original NTi Audio test signal for speech intelligibility measurements with the XL

118STIPA1Run IndicationThis icon displays the run status of the STIPA measure-ment. 2Measurement ResultSingle value speech transmission index

119STIPA7Measurement UnitThe STIPA result is displayed in STI (Speech Transmission Index) or CIS (Common Intelligibility Scale), whereby CIS is calcu

12Overview1Measurement Results Individual level measurement results.2Main MenuSLMeter/RTA SPL & RTA MeasurementFFT + Tol FFT Analysis with opti

120STIPA13STIPA Modulation Index MF1, MF2For good speech intelligibility it is mandatory that the in-tegrity of the transmitted voice signal

121STIPASTIPA Measurement - Getting StartedTest PreparationsThe XL2 reads the electronic data sheet of the connected NTi Audio measurement

122STIPAStart STIPA MeasurementPress start • . The progress bar switches to RUNNING. The test result tendency is shown on the STIPA ba

123STIPAStore STIPA Measurement ResultTo store the test result, select the memory menu • with the rotary wheel and press enter .Select • S

124STIPAStart AveragingSelect the averaging page • Avr.Turn the rotary wheel • to select the parameter START NEW and press enter . The fir

125STIPAFinish Choose • Finish to end the averaging.  The STIPA average and the deviation is displayed for docu-mentation.Display of STIPA Numeric

126STIPASTIPA with Ambient Noise CorrectionMeasuring the speech intelligibility index under realistic en-vironmental conditions is often not

127STIPACommissioning New PA-SystemsNew announcement systems are commissioned e.g. at public areas prior the grand opening. Thus the actual ambient no

128STIPASTIPA MeasurementSelect the STIPA result page • 123.Perform the default STIPA measurement. • The XL2 displays the corrected STIPA result i

129STIPASTIPA Measurement Hints Hints: Ambient NoiseThe ambient noise has to be sufficiently static during the •measurement. A signal-noise r

13OverviewAfter a completed measurement, the memory symbol indicates a non-saved measurement report. Your measure-ment needs to be stored manuall

130STIPAHints: CD-PlayerOnly high-quality CD-Players should be used to reproduce •the STIPA test signal as only limited time-shifts (+/- 20 pp

131Audio Analyzer6. Audio AnalyzerThe XL2 offers a comprehensive audio analyzer. Broadband or wideband measurements are offered by the measure

132Audio Analyzer1FilterZ-Weighting Frequency Z-weighting with flat frequen-cy response from 20 Hz to 22 kHz. De-fault measurement setting.A-Weighting

133Audio Analyzer PreNotch ListeningThe input signal is audible at the rear speaker or headphone output.Press and hold down the speaker button • .

134Audio AnalyzerOscilloscopeThe scope function visualizes the waveform of the electrical in-put signal. It automatically triggers to the fundamental

135Calibration7. CalibrationThe XL2 Audio and Acoustic Analyzer meets or exceeds the specifications listed in the chapter Technical Data.Instrumen

136Calibration2136451Phantom Power Supply48V The XL2 provides 48 V phantom power supply to the connection microphone or sensor.ASD An NTi Audio measur

137Calibration5Level TypeLZFDefault setting.LHP100FSuppressing any low frequency noise, for example wind during outdoor calibrations.6Electronic

138Profiles8. ProfilesProfiles are templates of measurement setups. You may define which profile is loaded at startup, so that the measurements are carried

139ProfilesPreset Measurement FunctionStart the XL2 Analyzer in • Full mode.Select the typically-used measurement function and adjust •the measurem

14Getting Started3. Getting StartedPower Supply The XL2 offers flexible power management options and can be operated either byReplaceable, rechargeabl

140ProfilesSelect • Manage and press enter . The Manage Profile menu opens. Each stored profile includes all settings of all measurement func

141ProfilesSelect • Configure available screens and press enter .Select additional available pages/measurement functions for •the profile; e.g., RTA .

142ProfilesRun MeasurementThe profile name is displayed when a measurement function is highlighted. The main menu offers only the measurement fun

143ProfilesExport MyFirstProfile to PCIf you have two or more XL2 Audio and Acoustic Analyzers, you may like to transfer the same profiles to the

144ProfilesThe XL2 can store up to 20 individual profiles in the internal system memory and offers three different profile types: Types Descripti

145Capture + Tolerances9. Spectral Limits Option (Cap-ture + Tolerances)The Spectral Limits Option extends the function range of the XL2 with trace

146Capture + TolerancesA pop-up window shows up.Select • Capture EQ.Confirm with enter •.The pop-up window ... and store it to shows up.Select •

147Capture + TolerancesEdit Capture ManuallySelect the Capture & Start Tolerance Mode symbol.•Confirm with enter •.Select • Manage captures.Confi

148Capture + TolerancesThe relative difference of the Live level compared to the captured reference is displayed. All levels differences

149Capture + TolerancesA pop-up window shows up.Select • Start tolerance mode.Confirm with enter •.The pop-up window Make tolerance from shows up

15Getting StartedRechargeable Li-Po BatteryOpen the battery cover at the rear of the instrument.•Insert the rechargeable Li-Po battery with the conta

150Capture + TolerancesPassed ResultThe tolerance mode is active for passed/failed measure-ments.The passed/failed condition is further visua

151Capture + TolerancesFailed Result The XL2 Analyzer compares spectral measurements against a tolerance band and visualizes exceptions 1 in every fre

152Capture + TolerancesAdvanced Start FunctionsYou may start the passed/failed measurement by one of the following possibilities:Press the XL2 st

153Capture + TolerancesStore your individual tolerance file as txt-file in the XL2 folder •“Tolerances”.Start the XL2 tolerance mode and load the new t

154Capture + Tolerances#Unit dBr (relative), fixed setting#Mode Describes tolerance type; the XL2 allows set-ting of the tolerance type independently o

155Capture + Tolerances#Hide UnusedBandsThis parameter defines which tolerance fre-quency range is shown. (not mandatory)True Measurement results

156Capture + Tolerances#AutoStartTrig-gerLevelSets the sound level in dBZ for an automated level trigger; the passed/failed measurement starts as

157System Settings10. System SettingsThe various system settings of the instrument can be adjusted as follows: Turn the rotary wheel to navigat

158System Settings4BacklightToggle the backlight with the power/backlight button . The backlight offers three different conditions:On•Dimmed•O

159System Settings7Phantom PowerYou can select if the phantom power should be activated or disabled when the XL2 is powered up.Off The phantom power i

16Getting StartedAA-BatteriesAlternatively, the XL2 can be powered by AA type batteriesOpen the battery cover.•Insert 4 fully-charged AA batteries, o

160System SettingsInformation11121311FirmwareDisplays of the firmware version number 11 (to update the firmware to the latest version see the cha

161System SettingsScheduler1234567The XL2 Analyzer offers automated scheduled measurements without any human interaction. You may schedule a measure-m

162System Settings1FunctionSelect the measurement functions for the scheduled mea-surements.2Start Date and TimeSet the date for the scheduled measure

163System Settings7Start ScheduleStarts the scheduled measurement(s). The Scheduler active window is displayed.Scheduling - Getting StartedAfter sta

164Data Management11. Data ManagementThe XL2 stores all acquired measurement data including real-time information onto the removable SD Card. A

165Data Management5Save TestStores the measurement in the selected project folder.6Save ScreenshotStores the XL2 screen in the selected project folder

166Data ManagementMemory Structure of SD Card1231ProjectsThe folder Projects contains subfolders with the stored measurement results. The de

167Data ManagementSelect Parameters for Measurement ReportSelect the • Rep page in the sound level meter function and set the parameters as follows:C

168Data ManagementOpen the Memory MenuSelect the memory menu • with the rotary wheel and confirm with enter .  The memory menu opens with “Save T

169Data ManagementRecord Voice NotesVoice notes are recorded speech annotations for each stored measurement. The XL2 utilizes the internal voice note

17Getting StartedAttaching the Hand StrapTo avoid accidentally dropping the XL2, a hand strap is supplied with the instrument.Pull the loop of the han

170Data ManagementSave ScreenshotSelect the memory menu • with the rotary wheel and confirm with enter .  The memory menu opens.Select • Save Sc

171Data Management Measurement Data Logging:If the battery runs empty while you are measur-ing with logging and/or repeated-reporting en-abled, t

172Data Management The PC recognizes the XL2 as a mass storage device. The following SD Card content is shown:Open the folder “Projects” and the sub

173Data Management3Measurement Report FileFinal report after the completed measurement. For more details please see the chapter Sound Level Meter:

174Data ManagementLog File FormatFile name: e.g. MyTest_SLM_000_123_Log.txtXL2 Broadband Logging MyProjects

175Data ManagementRecall MeasurementsThe straight-forward but powerful Load Test and Save Test functions serve the dual purpose of conveni

176Data ManagementSelect File Name Select • Load Test and confirm with enter . The pop-up window Load Test shows up. Select the project folder

177Data ManagementAppend Measurements The append mode stores the results of several individual mea-surements into the same data file, thus simplifying

178Data ManagementSelect FilenameSelect the user part of the file name. The maximum length of •the user part is 12 characters. The right part “_SLM_00

179Data ManagementStore Measurement Results The pop-up window Append Data shows up. Select the location ID and measurement ID, thus each mea-•surem

18Getting StartedUnfolding the Stand A convenient table stand is attached to the rear of the instru-ment.Unfold the stand and rest the XL2 on a flat s

180Data ManagementAppend After Power UpYou can continue to add measurement results into the same data file at any time later.Store the measurements in

181Data Management

182XL2 Data Explorer12. XL2 Data Explorer (optional)XL2 Data Explorer is a PC-based software application with a powerful data processor for eas

183XL2 Data Explorer

184XL2 Projector13. XL2 Projector SoftwareThe XL2 Projector displays the XL2 screen in real-time on your PC when connected by USB. The

185XL2 ProjectorSelect • COM port on the XL2. Microsoft Windows may rec-ognize the new hardware automatically and start the hard-ware installation

186Remote Measurement14. Monitoring NetworkMultiple XL2 Analyzers connect with USB Device Servers to a network for online monitoring of noise or

187Microphones16. Microphones NTi Audio Microphone OverviewM2230 M2211 M2215 M4260 MA220 PreAmplifierCertified Class 1 measurement microphone accordi

188MicrophonesThe plug-on measurement microphones combined with the XL2 Analyzer form a comprehensive sound level meter and acoustic ana

189MicrophonesMicrophone plugs directly into the XL2The XL2 automatically reads the electronic data sheet of the connected microphone as follows:Co

19Getting StartedAudio Measurements: XLR ConnectionConnect the source to the XL2 with an XLR cable.•Select the XLR input in the menu.•Audio Measurem

190Further Information17. Further InformationMy NTi AudioRegister your instruments at My NTi Audio and benefit from the following possibilities:Free up

191Further InformationTips and TroubleshootingOverviewResetting to Factory Default•XL2 Starts Up with Limited Functions•Can I use another SD Card?•

192Further InformationSD Card ErrorsThe XL2 Audio and Acoustic Analyzer writes measurement data automatically onto the SD Card during ongoing m

193Further InformationFirmware UpdateYou will find information about the installed firmware ver-sion in the systems settings of the instr

194Further InformationOptions and AccessoriesThe System menu shows the installed options on the XL2. The following options extend the me

195Further InformationRemote Measurement OptionNTi Audio #: 600 000 375 The Remote Measurement Option allows querying of the XL2 measurement data on

196Further InformationType Approval OptionNTi Audio #: 600 000 377The Type Approval Option upgrades the instrument to the XL2-TA, the sound le

197Further InformationCinema Meter OptionNTi Audio #: 600 000 379 The Cinema Meter Option forms the dedicated solution for efficient calibra

198Further InformationInstallation of Options1.Login(http://my.nti-audio.com) Activate option6.5.Mass storageOpen XL2-TA.htm3.4.1. PC2.Power On XL2

199Further Information8.Insert License number7.Get Activation Key1.10.Download activation file and copy to XL2 (xx_0xxxx.txt)9.

NTi Audio is an ISO 9001:2008 certified company.Made in SwitzerlandContact NTi Audio atHeadquarter +423 239 6060 [email protected]

20Getting StartedSwitching the XL2 On and OffSwitching On the XL2Press power to switch on the XL2. There is a brief sound of relays and the display

200Further InformationAccessoriesCalibration CertificateManufacturer Calibration CertificateThe calibration certificate lists the individ-ual product da

201Further InformationASD Cable The ASD Cable allows for extended con-nections of the NTi Audio measurement microphones. It supports the transfer

202Further InformationStack Light with I/O Adapter BoxThe XL2 Audio and Acoustic Analyzer con-trols the external Stack Light via the Digi-tal I/O Ad

203Further InformationXL2 Data Explorer SoftwareXL2 Data Explorer is a PC-based soft-ware application with a powerful data processor for

204Further Information4 GB SD Card (default)1x included with XL2NTi Audio #: 600 000 37416 GB SD CardIndividually tested high performance card for dat

205Further InformationCalibration CertificateYour NTi Audio instrument has been carefully tested during production and corresponds to the

206Further InformationDeclaration of ConformityCE / FCC Compliance StatementWe, the manufacturer NTi Audio AG Im alten Riet 102, 9494

207Specifications18. Technical Data XL2Sound Level MeterProduct Con-figurationsClass 1 Type 1XL2-TA, M2230 microphone and •ASD Cable forms an integrat

208SpecificationsStabilization Time< 10 secondsIntegration TimeMinimum: 1 second •Maximum: 100 hours minus 1 second •Display Measure-ment RangesThre

209SpecificationsMeasure-mentsSPL actual, L •eq, Lmin, Lmax, LCpeakGliding L •Aeq with selectable time window from five seconds to one hourAll measureme

21Getting StartedSetting the Parameters with the Rotary Wheel Turn the rotary wheel • to navigate within the display screen. The selecte

210SpecificationsFunctions ofSpectral LimitsOption (optional)SLMeter/RTA function •True peak level in 1/1 and 1/3 octave resolution »FFT function •High

211SpecificationsPolarity Checks polarity of speakers and line signals •Positive/Negative detection of wideband and •individual 1/1 octave bands thro

212SpecificationsAudio AnalyzerLevel RMS True RMS detection in V, dBu, dBV and dBSPL •Range XLR/RCA input: 2 µV - 25 V (-112 dBu to •+30 dBu)Accuracy:

213SpecificationsPower SupplyRechargeable Li-Po battery included •Type 3.7 V / 2260 mAh »Typical battery lifetime > 4 hours »Range: 3.3 - 4.5 VDC »

214Specifications19. Technical Data MicrophonesM2230Class 1 CertifiedM2211Frequency ResponseClass 1M2215High SPLFrequency Response Class 1M4260Class 2Mi

215SpecificationsM2230Class 1 CertifiedM2211Frequency ResponseClass 1M2215High SPLFrequency Response Class 1M4260Class 2Pressure Coefficient -0.005 dB /

216SpecificationsTypical Frequency Response of Measurement Microphones(free field conditions @ reference direction 0°)log frequency [Hz]-8-6-4-2024681 1

217SpecificationsLinear Measurement Range acc. IEC61672 / ANSI S1.4 (typ. microphone sensitivity)XL2 + M2230: 24 dB(A) - 138 dB XL2 + M2211: 29 dB(A)

218SpecificationsFree Field - Pressure FieldCorrection FactorsNominal Frequency[Hz]M2230Microphone[dB]M2211Microphone[dB]M2215Microphone[dB]5063800.00.

219SpecificationsDiffuse Field Correction FactorsNominal Frequency[Hz]M2230Microphone[dB]5063800.00.00.0 100125160 0.00.00.0 200250315 0.00.00.04005

22Sound Level Meter4. Sound Level MeterThe XL2 provides, together with the measurement micro-phone, a precise sound level meter for monitoring

220Specifications20. Technical Data PreAmplifierMA220 PreAmplifierMicrophone PreAmplifier Compatible with 1/2” microphone capsules type WS2F in accordance

221SpecificationsAppendixAppendix 1: Standard - Optional FeaturesStandard Features OptionalSound Level MeterFrequency Weighting Sound Level Meter Ti

222AppendixStandard Features OptionalSound Level Meter Parameter Extended Acoustic Pack: •Clock-Impulse Maximum Level (Taktmaximalpegel) in

223AppendixStandard Features OptionalSound Level Meter Logging100 ms loggingFFT AnalysisMeasurement Range Extended Acoustic Pack: • with zo

224AppendixStandard Features OptionalQuerying measurement data online via the USB interfaceRemote Measurement Option•supporting SLMeter/RTA and RMS/T

225AppendixAppendix 2: Factory Default ProfilesYou may start up the XL2 with individual preset application pro-files.The profile Full mode is the default

226AppendixThese levels are shown in the numeric result page:LAeq5”+k1 Time-averaged sound pressure level LAeq with correction value k1 and a movi

227AppendixLimitsThis profile is configured with the following limits, which trigger the lights on the limit button and external Digital I/O Adapter. Th

228AppendixThese levels are shown in the numeric result page:LAeq5”+k1 Time-averaged sound pressure level LAeq with correction value k1 and a moving t

229Appendix In accordance with SLV, all sound levels are measured, displayed and logged to SD Card automatically. The settings are lo

23Sound Level MeterThe sound level meter offers different pages:Page Selection using the Page Button Press page • to toggle between the 123 SLMet

230AppendixAppendix 3: Description Sound LevelsA-Frequency Weighting Filter in accordance with IEC 61672Applicable for most common sound pressure leve

231Appendix10h 00min 06sec Leq5” = Leq of the time win-dow from 10h 00min 01sec to 10h 00min 06sec10h 00min 07sec Leq5” = Leq of the time win-dow fro

232AppendixParameter liveActual current sound pressure level.Parameter maxMaximum sound level of the measurement cycle.Parameter minMinimum sound leve

233Appendix Parameter T3 equivalentTime-average Clock-Impulse Maximum Level (Taktmaximalpegel) LAFT3eq in accordance with DIN 45645-1.Paramete

234AppendixAppendix 4: Common Sound LevelsDisplay Application SettingLAESound Exposure LevelThe sound exposure level LAE is the LAeq normalized to 1 s

235AppendixLAeq + k1 Time-Average Sound Level with Correction ValueThe actual measurement position often differs to the loudest posi-tion of the live

236AppendixLAeq60’ +k1 Moving Time-Average Sound Level with Correction Value k1The actual measurement position often differs to the loudest posi-tion

237AppendixLAFmin dt Minimum Sound Pressure Level “delta t” in reportMinimum level of the preset logging interval in the LOG-menu, e.g. 1 second.LA

238AppendixLCeqTime-Average Sound Level orEquivalent Continuous Sound LevelAveraged sound level over time with C frequency weighting. -> -> LC

239AppendixLEXNoise Exposure Level LEXThe Noise at Work Directive 2003/10/EC lays down minimum re-quirements for the protection of workers from risks

24Sound Level MeterLogging: Setup of Data LoggingThe XL2 features a powerful sound level meter data logger, which allows you to record all re

1000 dt 04.14

25Sound Level MeterSet EQt, L%: Selection of measured levelsThis page allows setting the following levels:Moving Time-average Sound Level•Gliding LAe

26Sound Level MeterOverviewNumeric Result PageThe numeric result page 123 SLMeter displays the selected broadband sound level results. You can ch

27Sound Level Meter1Sound Level Result 1All sound levels are measured and logged simultaneously. You select which sound levels should be displayed.Cha

28Sound Level Meter6Actual Measurement TimeCounts actual measurement time in hrs:min:sec. Supports time modes: continuous, single and (synchronized) r

29Sound Level Meter8Phantom Power Supply48V The XL2 provides 48 V phantom power supply to the connection microphone or sensor.ASD An NTi Audio measure

3Table of ContentsTable of Contents5. Acoustic Analyzer ...64FFT Analysis + Tolerance ...

30Sound Level Meter11Y-Scale settingSelect the Y-Axis with the rotary wheel • and confirm with enter .Select the zoom factor between • 20,

31Sound Level MeterThe cursor read out may be set manually to any frequency band or wide band level. The read out re-mains at the selected fr

32Sound Level Meter17Measurement UnitSelect the measurement unit as follows:dB Sound level in dBSPLThis measurement unit is permanently selected u

33Sound Level MeterOverload IndicationIn case the measurement result exceeds the preset measure-ment range, then limit arrows indicate this overload

34Sound Level MeterSound Level Meter - Getting StartedTest PreparationsThe XL2 reads the electronic data sheet of any connected ASD microphon

35Sound Level MeterSelect Frequency WeightingThe pop-up window FREQ WEIGHTING shows up.Select the frequency weighting • A.Pop-up windows shown at i

36Sound Level MeterSelect Parameter The pop-up window extends with PARAMETER settings.Select the parameter • live.Confirm with enter • .Select Corr

37Sound Level MeterSelect further Sound LevelsSelect further sound pressure levels as described above; •e.g., LAeq and LAFmax. Select Input Ra

38Sound Level MeterStart MeasurementThe XL2 is ready to measure the sound levels L•AF, LAeq and LAFmax.Press start •. The run indication switches

39Sound Level MeterSave the Measurement ResultSelect the memory menu • with the rotary wheel and confirm with enter .The memory menu opens. Save

4Table of Contents11. Data Management ...164Record Voice Notes ...

40Sound Level MeterRTA Measurement - Getting StartedTest PreparationsThe XL2 reads the electronic data sheet of any connected ASD microphones

41Sound Level MeterSelect RTA Time WeightingThe pop-up window extends with TIME WEIGHTING.Select the required time weighting; e.g., • (=Fast).Confir

42Sound Level MeterSelect Upper/Lower RTA Parameter Select the parameter shown to the right of the upper • LZF value with the rotary wheel ; e.g.

43Sound Level MeterStart RTA MeasurementThe XL2 is ready to display the measured sound pressure •levels LZFmax and LZFlive.Press start •. T

44Sound Level MeterSave the RTA Measurement ResultSelect the memory menu • with the rotary wheel and confirm with enter .The memory menu opens.Pr

45Sound Level MeterReportingA report saves the conducted measurements onto the installed SD Card. The XL2 Supports setting the individual levels to be

46Sound Level MeterLoggingThe XL2 features a powerful sound level meter data logger, which allows you to record all required sound level valu

47Sound Level Meter4Log AudioThe XL2 logs audio data as a wav-file. Choose among the following settings:Off Audio logging is offOn Audio logging is act

48Sound Level MeterWav-File RecordingThe XL2 records a wav-file of the measured input signal and stores it on the SD Card. The available formats ar

49Sound Level MeterThe advantage of wav-file recordings is to identify and docu-ment sound sources after the measurement. For example, at a live eve

5IntroductionHow to Read this ManualThe XL2 push buttons are displayed as icons , , , , , , , , . A detailed description of the push buttons i

50Sound Level MeterEvents (optional)The event function is available with the XL2 Extended Acoustic Pack Option. The XL2 Analyzer may be configure

51Sound Level MeterTrigger Events: on level above/below10090807060Time [seconds]3Event Duration21413 12Level [dB] Features:The levels L•Aeq, LZeq and

52Sound Level MeterTrigger Events: on external key press10090807060Time [seconds]Event Duration15Event Duration15key pressLevel [dB] key pressFeatures

53Sound Level Meter1Trigger EventsChoose from the following settings:Off No event triggeringon level aboveEvents are triggered at noise levels above t

54Sound Level Meter5Log AudioThe XL2 logs audio data as a wav-file. Choose from the fol-lowing settings:Off Audio logging is offOn Audio logging is

55Sound Level Meter11Trigger and Marker MonitorAnswers the question: What caused the triggered event?Lvl Event automatically triggered by level.1 Even

56Sound Level MeterHow to Setup the XL2 for Triggered Event MeasurementsSelect the logging page, set• Logging On, Interval dt: 00:00:01 and

57Sound Level MeterLimitsThe limit page offers two functions:Setup of limit LED • function; enabling the XL2 to highlight any sound levels that excee

58Sound Level Meter5I/O - Level 1Setup the level for the control of e.g. the external Digital I/O Adapter Box. Select the •level field with the ro

59Sound Level MeterCorrection Value KSETThe correction value page offers a measurement wizard for live event monitoring, applicable in case the measur

6IntroductionProduct ConfigurationsThe following items are included with the respective model:XL2 without Micro-phone:XL2 Analyzer•Test Signal CD•US

60Sound Level MeterHow to Measure the Correction ValuePlay a pink noise signal at the typical sound pressure level of •the live event. (signal source

61Sound Level MeterWait until the measurement is completed.•The correction values k1 and k2 are calculated and displayed •including date and time (i

62Sound Level MeterSet the correction value with the rotary wheel • .The note “Manually Adjusted” is displayed at 2.To undo the manual setting turn

63Sound Level Meter

64FFT Analysis + Tolerance5. Acoustic AnalyzerBesides the comprehensive sound level meter function, the XL2 Audio and Acoustic Analyzer offers

65FFT Analysis + Tolerance13241115 789612141031Result Symbols / Capture & Start Tolerance ModeThis field offers two functions: Symbols for measurem

66FFT Analysis + Tolerance3Y-Scale settingSelect the Y-Axis with the rotary wheel • and confirm with enter .Select the zoom factor between

67FFT Analysis + Tolerance6Time WeightingOffers selectable time weighting of 0.1, 0.2, 0.5, 1.0 sec-ond as well FAST (125 ms) and SLOW (1 second). App

68FFT Analysis + Tolerance10Readout FrequencyYou may select any frequency to read out individual levels. The selected frequency is indicated by the cu

69FFT Analysis + Tolerance13Measurement UnitSelect the measurement unit as follows:dB Sound level in dBSPLThis measurement unit is permanently sel

7Overview897Headphone OutputSD CardTOSLink Output123456Voice Note InputRCA InputXLR InputDigital I/OUSB ConnectorDC Power Socket10Speaker11Tripod Moun

70FFT Analysis + ToleranceFFT Analysis - Getting StartedTest PreparationsConnect the measurement microphone to the XL2.•Switch on the XL2 •. The 4

71FFT Analysis + ToleranceSelect Upper/Lower Reading The pop-up window Select reading shows up.Select the integrated averaged reading • EQ. All ava

72FFT Analysis + ToleranceSelect Input RangeSelect the lowest possible input range according to the maxi-•mum level expected during the measurement.S

73FFT Analysis + ToleranceSave the FFT Measurement ResultSelect the memory menu • with the rotary wheel and confirm with enter .The memory menu o

74Reverberation Time RT60Reverberation Time RT60The XL2 measures the energy decay from 63 Hz to 8 kHz using the Schroeder method in 1

75Reverberation Time RT60RT60 Run Test Page 2710115431689RT60 Result Page 121415171613

76Reverberation Time RT60RT60 Cycle Result Page 192120181Set Level MarkersPrior to conducting a reverberation time measurement, the environmental noi

77Reverberation Time RT604Measurement Status STATDisplays the actual measurement status. Start and stop the reverberation time measurement with st

78Reverberation Time RT6011Page Selector RT60Select between the RT60 run test page and the result page. The page button toggles between these display

79Reverberation Time RT6013Uncertainty FactorThe uncertainty factor is displayed in the RT60 average re-sult page. It indicates the uncertainty of the

8Overview1XLR Signal InputEither a balanced audio signal, an NTi Audio measure-ment microphone or the microphone pre-amplifier MA220 plug dire

80Reverberation Time RT6018Correlation Factor in %The correlation factor is 100% for perfectly linear sound pressure level decay after the

81Reverberation Time RT60RT60 Measurement - Getting StartedTest Signal: Pink NoisePlay a pink noise signal through an omni-directional speaker in the

82Reverberation Time RT60Set Level MarkersSelect the parameter • SET with the rotary wheel and press enter . The environmental noise is

83Reverberation Time RT60Start the MeasurementPress start • . The status indication switches to ARMED.Enable the test signal; e.g., switch on the gat

84Reverberation Time RT60Stop the Measurement and Read Out the ResultPress stop • after all cycles are completed. If applicable, switch off the pink

85Reverberation Time RT60Error IndicationsVarious error indications are displayed for unsuccessful RT60 measurements. Corrupt cycles can be delet

86PolarityPolarityPolarity measurement is important in matching the left and right speakers for a good stereo sound image. The polarity function measu

87PolarityDetailed Result Page6510978Polarity result for Minirator connected directly to XL2 Analyzer 1Input SelectionSelect the signal source as foll

88Polarity4Balance IndicatorIndication of the audio signal balance between pin 2 and 3 on the XLR input for input signals > -34 dBu.The input signa

89PolarityPolarity Measurement - Getting StartedFor acoustic polarity measurement you can use the internal voice note microphone, or an e

9OverviewOperation9 8 76543211Page Control Switches among various screens depending on the menu function selected.2Volume of Speaker and Headphone Out

90Delay TimeDelay TimeThe delay time measurement function is suitable for accurate configuration of delay line setups, by optimizing the direction-alit

91Delay Time4Calculated DistanceDistance from measurement position to speaker in meters or feet, based on the defined temperature in °C or °F5Synchroni

92Delay TimeDelay Measurement - Getting StartedThe delay time measurement is conducted between the syn-chronized electrical input signal and the ac

93Delay TimeWait until the XL2 synchronizes to the incoming delay test •signal, then the synchronization time bar fills up.Disconnect the audio c

94Delay TimeStore ReferenceSelect the displayed • 0.0 ms below Act. Delay with the rotary wheel and press enter . The reference result of spea

95Delay TimeAutomated Difference CalculationThe delay time difference between speaker A and B is •automatically calculated and shown bel

961/12 Octave + Tolerance1/12 Octave + Tolerance (optional)The Spectral Limits Option extends the XL2 function range with an RTA analyzer with

971/12 Octave + Tolerance241215 78961311310141Result Symbols / Capture & Start Tolerance ModeThis field offers two functions: Symbols for measureme

981/12 Octave + ToleranceManage capturesAllows to rename captures, clear re-corded captures, save captures to SD-Card for export from the XL

991/12 Octave + Tolerance5Input RangeThe XL2 Analyzer provides three input ranges to accom-modate the wide range of input signals. The individ