NTI Audio XL2 OPERATING MANUAL
OPERATING MANUAL
HANDHELD AUDIO AND
XL2
ACOUSTIC ANALYZER
Contact NTi Audio at
Headquarter +423 239 6060 info@nti-audio.com
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United Kingdom +44 1438 870632 uk@nti-audio.com
www.nti-audio.com
NTi Audio is an ISO 9001:2008
certified company.
Firmware V3.03
Version 3.03.00 / 5. May 2015
All information subject to change without notice.
© All rights reserved.
® Minirator is a registered trademark of NTi Audio.
™ XL2, XL2-TA, EXEL, M2230, M2230-WP, M2211, M2215, M4260 and MA220
are trademarks of NTi Audio.
Ma d e i n
Switzerland
Table of Contents
Table of Contents
1. Introduction .....................................................................5
2. Overview .......................................................................... 7
Operation
The Screen Display
3. Getting Started
Power Supply
Attaching the Hand Strap
Unfolding the Stand
Connecting the XL2
Switching the XL2 On and Off
Select Measurement Function
Calibration prior Measurement
4. Sound Level Meter ........................................................ 22
Overview
Sound Level Meter - Getting Started
RTA Measurement - Getting Started
Reporting
Logging
Wav-File Recording
Events (optional)
Limits
Correction Value KSET
Locked Run Mode
....................................................................... 9
...................................................... 11
.............................................................14
.............................................................. 14
............................................. 17
..................................................... 18
.................................................... 18
.....................................20
.....................................20
....................................21
.....................................................................26
...........................34
...........................39
.....................................................................44
........................................................................ 45
......................................................47
..........................................................49
........................................................................... 56
.................................................58
........................................................ 62
5. Acoustic Analyzer ..........................................................64
FFT Analysis + Tolerance
Reverberation Time RT60
Polarity
.........................................................................86
Delay Time
1/12 Octave + Tolerance (optional)
Noise Curves (optional)
Speech Intelligibility STIPA (optional)
6. Audio Analyzer ............................................................134
RMS / THD+N
Oscilloscope
7. Calibration ...................................................................138
8. Profiles
9. Spectral Limits Option (Capture + Tolerances) .........149
10. System Settings
Settings
Information
Scheduler
...................................................................90
............................................................ 134
..............................................................137
......................................................................... 142
........................................................ 161
...................................................................... 161
................................................................164
................................................................... 165
..............................................64
............................................. 74
............................... 96
.............................................. 107
..........................117
3
Table of Contents
11. Data Management ....................................................168
Record Voice Notes
Recall Measurements
Append Measurements
12. XL2 Data Explorer (optional)
13. XL2 Projector Software
14. Monitoring Network
15. Remote Measurement
16. Microphones ............................................................191
17. Further Information ..................................................200
My NTi Audio
Tips and Troubleshooting
Firmware Update
Options and Accessories
Warranty Conditions
Calibration Certificate
Service and Repairs
Declaration of Conformity
18. Technical Data XL2 .................................................... 219
19. Technical Data Microphones ....................................227
.................................................... 173
................................................ 179
............................................ 181
................................... 186
............................................188
................................................. 190
.............................................. 190
.............................................................200
........................................... 201
.......................................................203
...........................................204
.................................................. 216
................................................. 216
................................................... 217
.................................. 217
Appendix
.........................................................................236
Appendix 1: Standard - Optional Features
Appendix 2: Factory Default Profiles
Appendix 3: Description Sound Levels
Appendix 4: Common Sound Levels
.................236
.........................240
......................245
..........................249
20. Technical Data PreAmplifier
4
......................................235
1. Introduction
Introduction
Thank you for purchasing the XL2 Audio and Acoustic Analyzer.
The XL2 Analyzer forms the unique combination of a state-ofthe-art Sound Level Meter, a comprehensive Acoustic Analyzer
as well as a powerful Audio Analyzer. The wide range of functionalities is tailored for:
Audio-Acoustic Installations •
Installed Sound
Life Safety Systems
AV Installations Cinemas
-
Noise Measurements•
Live Events
Environmental Noise
Occupational Health
Vehicle Noise
-
Live Sound•
Sound Level Monitoring
Front of House
PA Rental
-
Broadcast•
Building Acoustics•
Industrial Quality Control and Aerospace•
How to Read this Manual
The XL2 push buttons are displayed as icons
, , , , . A detailed description of the push buttons is
listed in the chapter Overview - Operation.
Menu items displayed on the XL2 page screens are shown in
this user manual by a bold font, e.g., SLMeter, Parameter, ...
, , , ,
5
Introduction
Product Configurations
The following items are included with the respective model:
XL2
without
Microphone:
XL2 +
M2230:
XL2 Analyzer•
Test Signal CD•
USB cable•
Li-Po battery•
Hand strap•
Operating manual•
XL2 Analyzer•
M2230 Measurement Microphone•
consisting of
MA220 Microphone PreAmplifier
Microphone Capsule for M2230
-
50 mm Windscreen•
Microphone-holder MH01 •
with Adapter 5/8“ - 3/8“
Individual Frequency Response Chart•
Test Signal CD•
Li-Po battery•
USB cable•
Hand strap•
Operating manual•
XL2 +
M2211:
XL2 +
M4260:
XL2 Analyzer•
M2211 Measurement Microphone•
consisting of
MA220 Microphone PreAmplifier
Microphone Capsule for M2211
-
33 mm Windscreen•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Test Signal CD•
Li-Po battery•
USB cable•
Hand strap•
Operating manual•
XL2 Analyzer•
M4260 Measurement Microphone•
33 mm Windscreen•
Microphone-holder •
with Adapter 5/8“ - 3/8“
Test Signal CD•
Li-Po battery•
USB cable•
Hand strap•
Operating manual•
6
2. Overview
Overview
Tripod Mount
11
XL2 interfaces:
1
XLR Input
RCA Input
Voice Note Input
2
Speaker
10
Digital I/O
6
USB Connector
3
5
DC Power Socket
4
SD Card
7
TOSLink Output
8
9
Headphone
Output
7
8
Overview
1
XLR Signal Input
Either a balanced audio signal, an NTi Audio measurement microphone or the microphone pre-amplifier MA220
plug directly into the XLR input. The Automated Sensor Detection (ASD) technology reads the electronic
data sheet of any connected NTi Audio device after the
48 V microphone phantom power is activated.
2
RCA Input
Unbalanced audio signal input.
3
Voice Note Input
Internal microphone for recording voice notes and measuring polarity and delay time. For polarity measurements, an
external microphone may also be used.
4
DC Power Socket
Socket for mains power adapter. Further details in the chapter Power Supply in this manual.
5
USB Connector
Mini-B USB connection, for accessing the SD Card.
6
Digital I/O
Programmable digital inputs/outputs.
7
SD Card
For storing data, screenshots, voice notes, wav-files.
8
TOSLink Output
24 bit linear PCM audio signal output. For future use; not
active at this time.
9
Headphone Output
The XLR/RCA input signals are routed to the headphone output. Connecting headphones mutes the internal speaker.
To connect the headphone output directly to a line input, a
load impedance < 8 kOhm is required for proper operation.
This can be achieved by inserting a 1 kOhm resistance between tip and ground of the output jack.
10
Speaker
The XLR/RCA input signals are routed to the speaker. Press
the speaker button
to toggle the speaker on/off. Press
and hold the speaker button to access the volume control.
Set the speaker level with the rotary wheel
11
Tripod Mount
.
Mechanical mount for attaching the XL2 to a tripod or microphone stand.
9
Overview
Operation
9 8 7
1
1
Page Control
2
3
Switches among various screens depending on the menu
function selected.
6
4
2
Volume of Speaker and Headphone Output
Press the button• briefly to enable or disable the speak-
er.
The speaker is activated and the speaker or headphone
icon shows up in the upper menu bar.
Press and hold the speaker button •
.
A pop-up window for volume is displayed.
5
10
Overview
Hold the speaker button •
down and adjust the level
of the speaker and headphone outputs with the rotary
wheel
. Digital gain control prevents gain increases beyond a level that will cause signal clipping. The maximum
gain setting depends on the connected input signal.
The headphone output provides a linear output signal •
using the SLMeter function (for input levels of approx.
-30 dBu and higher, which equals at M2230: 85 dBA,
M2211: 92 dBA utilizing a pink noise test signal).
3
Power & Backlight
The power button switches the instrument on. The XL2 is
immediately ready for operation. Holding down the power
button
a brief press of the power button
for one second switches the XL2 off. Additionally,
toggles the backlight
during operation.
4
Limit
SLMeter: • The limit button lights up green, yellow or red
according to the settings in the Limit page. Press the
limit button
to access the Limit page. For more details
visit the chapter Sound Level Meter: Limits.
FFT + Tol: • The limit button lights up green for results
within tolerance and red for out-of-tolerance results.
Polarity: • The limit button lights up green at positive polar-
ity and red at negative polarity.
1/12 Oct + Tol: • The limit button lights up green for results
within tolerance and red for out of tolerance results.
5
Pause
Pauses the current measurement. Press the pause button
or the start/stop button to continue the measure-
ment. The data logging is continued in the function SLMeter/RTA during the pause period and listed in the log file.
6
Start/Stop
Starts and stops a measurement.
7
Enter
Confirms a selection.
8
Rotary Wheel
Selects the required measurement function or the individual measurement parameter.
9
ESC
Terminates an entry, returns to the top menu level or closes
an open window.
11
Overview
The Screen Display
The XL2 displays the actual sound levels also in case of no
measurement has been started. Any displayed averaged level
refers to the previous measurement period. The XL2 shows
four lines in case of no previous measurement period is applicable.
Updating of display
Numeric values•
Updated every 500ms independent of the measurement
function. The maximum time span between the end of
the measurement period and the first test result display is
500ms.
Graphs and spectra•
Updated every 50ms
2 3 4 75 986
1
The display is updated continuously during measurement.
12
Overview
1
Measurement Results
Individual level measurement results.
2
Main Menu
SLMeter/RTA SPL & RTA Measurement
FFT + Tol FFT Analysis with optional Tolerance
Management
RT60 Reverberation Time RT60
Polarity Polarity
Delay Time Delay Time
RMS/THD+N RMS Level and Distortion
Oscilloscope Scope
1/12 Oct + Tol Spectral Analysis with Tolerance Man-
agement (optional)
Noise Curves Noise Curves
STIPA Speech Intelligibility (optional)
Cinema Meter Calibration and verification of cinema
loudspeaker systems (optional)
Calibrate Calibration Menu for microphone
Profile ... Store and load measurement profiles
System System Settings
3
Page Selector
Toggles between available measurement and result pages
within the same function menu. Alternatively use the page
button
4
Input Selector
.
Select XLR or RCA input connectors as the source.
5
Memory Menu
The memory menu is used for data storage management.
One of the following symbols flashes before or after starting the measurement:
9-8-7 Time
in seconds until instrument is settled and
measurement will start.
RUN Indicates the ongoing measurement.
LOG Indicates the ongoing measurement with data
logging.
AUD Indicates the ongoing measurement with data
logging and audio recording.
Evt Indicates an ongoing triggered-event recording.
13
Overview
After a completed measurement, the memory symbol
indicates a non-saved measurement report. Your measurement needs to be stored manually. For more details visit
the chapter Data Management.
6
Speaker/Headphone
Indication of enabled rear speaker or headphone output.
7
Phantom Power Supply
48V T
he XL2 provides 48 V phantom power supply
to the connection microphone or sensor.
ASD An NTi Audio measurement microphone with
automated sensor detection ASD is connected. The XL2 reads the electronic data sheet of
the microphone and switches the 48V phantom power automatically on
48V Phantom power is switched off.
8
Real-Time Clock
The real-time clock is set in the System menu.
9
Battery Symbol
The battery symbol indicates the battery status as follows:
Using rechargeable Li-Po battery:
Level indication 100% (U > 4.0 Volt).
Level indication:
75%: U = 3.9 - 4.0 Volt
50%: U = 3.8 - 3.9 Volt
25%: U = 3.7 - 3.8 Volt
Level indication 0% (U < 3.7 Volt). The battery is
almost empty and must be recharged.
The battery is being recharged by the mains
power adapter or the USB connection to PC.
Using standard AA batteries:
No level indication as long as U > 4.5 Volt.
Level indication 0% (U < 4.5 Volt). The batteries
are almost empty and should be replaced.
Using mains or supply:
No indication of battery status.
14
Getting Started
3. Getting Started
Power Supply
The XL2 offers flexible power management options and can be
operated either by
Replaceable, rechargeable lithium-polymer (Li-Po) battery •
(included with the XL2 Analyzer)
4x AA-batteries•
Mains Power Adapter•
The new battery is charged to approximately 50% and should
be fully charged before use with:
Battery Charger
(optional)
Mains Power
Adapter
(optional)
USB Power
from PC
Charging Time: approx. 3 hours
NTi Audio #: 600 000 332
Charging Time: approx. 6 hours
Leave the battery inside and switch off
the XL2
NTi Audio #: 600 000 333
Charging Time: approx. 6 hours
Switch off the XL2
ing.
for charging.
for faster charg-
Operation using Mains Power Supply
You can also operate the XL2 with mains power using the NTi
Audio DC power supply unit. During operation with this external Mains Power Adapter, it is recommended to leave the batteries inside the instrument.
Mains Power Adapter
Electrically-isolated, linear DC power supply•
Non-NTi Audio power supplies may have neg-•
ative effects on measurements.
A decreased THD+N performance will oc-•
cur with unbalanced input signals when
using switching-type power supplies
(approx. 3 dB).
Damage caused by using an inappropriate ex-•
ternal DC supply is not covered by warranty.
DC Power supply specifications
Voltage: 7.5 - 20.0 Volt•
Power: minimum 6 Watt•
Connector type: 2.1 x 5.5 x 9.5 mm•
Polarity: •
.
15
Getting Started
Rechargeable Li-Po Battery
Open the battery cover at the rear of the instrument.•
Insert the rechargeable Li-Po battery with the contacts edge •
first.
Close the battery cover.•
3.
Switch off the XL2 for faster recharging by
mains power adapter or USB connection.
2.
Caution
Switch the XL2 off prior opening the battery •
cover in order to prevent any electronic discharges.
Avoid short-circuits.•
Operate and charge the battery between 0°C •
and 45°C (32°F - 113°F).
Do not heat the battery above 60°C.•
Do not place the battery in or near fire.•
Do not solder directly on to the battery.•
Do not disassemble the battery.•
Do not insert the battery in reverse polarity.•
1.
16
Getting Started
AA-Batteries
Alternatively, the XL2 can be powered by AA type batteries
Open the battery cover.•
Insert 4 fully-charged AA batteries, observing correct polarity •
of the +/- indications in the battery compartment.
The polarity alternates with successive batteries.
Close the battery cover.•
2.
Switch the XL2 off prior opening the battery •
cover in order to prevent any electronic discharges.
Use only similar batteries from the same •
manufacturer.
Replace discharged batteries with new ones.•
Do not mix used and new batteries.•
During operation, the battery temperature •
may increase noticeably. This is not a defect.
Remove all batteries if the XL2 is not to be •
used over a long period of time.
1.
17
Getting Started
Attaching the Hand Strap
To avoid accidentally dropping the XL2, a hand strap is supplied
with the instrument.
Pull the loop of the hand strap through the opening.•
Pull the other end of the hand strap through the loop.•
Pull the hand strap tight.•
2.1. 3.
18
Getting Started
Unfolding the Stand
A convenient table stand is attached to the rear of the instrument.
Unfold the stand and rest the XL2 on a flat surface.•
Connecting the XL2
Acoustic Measurements
Connect an NTi Audio measurement microphone to the XLR
input connector of the XL2.
19
Getting Started
Audio Measurements: XLR Connection
Connect the source to the XL2 with an XLR cable.•
Select the XLR input in the menu.•
Audio Measurements: RCA Connection
Connect the source to the XL2 with an RCA (cinch) cable.•
Select the RCA input in the menu.•
20
Getting Started
Switching the XL2 On and Off
Switching On the XL2
Press power
There is a brief sound of relays and the display illuminates.
Switching Off the XL2
Press power
the XL2.
to switch on the XL2.
and hold it down for one second to switch off
Select Measurement Function
Navigate with the rotary wheel • to the main menu bar.
Confirm with enter •
The main menu window opens
Scroll up/down with the rotary wheel • to select the re-
quired function and confirm with enter
to select the measurement function.
Main menu with enabled options
.
The measurement function is selected.
21
Getting Started
Setting the Parameters with the Rotary Wheel
Turn the rotary wheel •
screen.
to navigate within the display
The selected parameter is highlighted with a black back-
ground.
Confirm with enter • .
The parameter display flashes and/or available parameters
or settings are shown.
Turn the rotary wheel •
enter
Confirm with enter • .
through the settings.
to set the parameter or toggle with
Now the parameter is set.
Calibration prior Measurement
We recommend the daily calibration of the XL2 Analyzer with
the precision calibrator. This ensures accurate measurement
results.
For more details see chapter Calibration.
22
Sound Level Meter
4. Sound Level Meter
The XL2 provides, together with the measurement microphone, a precise sound level meter for monitoring live sound
events and/or environmental noise.
The Type Approval Option upgrades the instrument to the
XL2-TA, the sound level meter dedicated to certified measurements. The XL2 with the M2230 microphone forms a type approved sound level meter offering class 1 performance according IEC61672 (see chapter Options and Accessories)
For example, Actual, Lmin, Lmax, Leq with frequency weighting A, C and Z and time weighting F and S can be measured
at the same time. All measurement results are simultaneously
available. You may log all acquired level information, including
real-time information, onto the removable SD Card. To complete the documentation of the measured sound pressure levels, the XL2 offers wav-file recording, as well as the facility
to add voice notes for each measurement. The XL2 measures
correction values between the loudest point of the live event
and the actual measurement positions in accordance with DIN
15905-5 and SLV. In parallel with the wide band parameters,
the XL2 measures the real-time spectrum either in 1/1 or 1/3
octave-band resolution. The RTA perfectly suits tasks such as
optimization of sound systems
Extended Acoustic Pack (optional)
The Extended Acoustic Pack offers the following additional features for sound-level and acoustic measurements:
SLMeter/RTA function•
Recording of linear wav-files (24 bit, 48 kHz)
Percentiles for wide band and spectrum with flexible set-
ting from 0.1% to 99.9%
Sound Exposure Level L
100ms logging
Event-triggered audio and data recording
Time weighting: Impulse (LxI, LxIeq with x= A, C, Z)
True peak level in 1/1 and 1/3 octave resolution
Clock-Impulse Maximum Level (TaktMax) and values as
specified in DIN 45645-1
FFT function•
High-resolution Zoom-FFT with selectable frequency
ranges and resolution up to 0.4 Hz in the range of 5 Hz to
20 kHz
RT60 function•
Reverberation time RT60 in 1/3 octave resolution
-
AE
23
Sound Level Meter
The sound level meter offers different pages:
Page Selection using the Page Button
Press page • to toggle between the 123 SLMeter page
and the RTA page.
Page Selection using the Rotary Wheel
Select the page • 123 SLMeter with the rotary wheel .
Confirm with enter •
.
Menu with enabled options
You have selected the individual sound level meter page.
123 SLMeter: Sound Level Meter
Displays the selected broadband sound level results. You can
change the font size of the result. Depending on the font size
chosen, the XL2 shows 3 or 5 results simultaneously. Individual
frequency weighting, time weighting, actual, minimum, maximum and correction values can be chosen for each displayed
result.
RTA: Real-Time Spectrum
Displays the 1/3 or 1/1 octave spectrum of the selected sound
level within the audio band. Additionally the wide band result is
shown graphically by a bar.
Reporting: Report Setting
Here you set which sound pressure levels shall be stored in a
.txt file after the completed measurement. Choose between:
ALL Stores all sound pressure levels.
Selected Stores up to 10 different individually-defined
sound pressure levels.
For details refer to the chapter Reporting.
24
Sound Level Meter
Logging: Setup of Data Logging
The XL2 features a powerful sound level meter data logger,
which allows you to record all required sound level values during the measurement. In the logging page you set which sound
pressure levels shall be logged over time. For details refer to
the chapter Logging. Choose between:
ALL Logs all sound pressure levels.
Selected Logs up to 10 different individually-defined sound
pressure levels.
Event Trigger: Event Setting (optional)
The event function is available with the optional Extended
Acoustic Pack. The XL2 event feature offers the following functionalities:
Automated event triggered at noise levels above/below a •
preset value including setting markers for specific noise categories. Application example: Recording the noise level for
LAF > 80 dB.
Event triggered by external key press of the XL2 Input Key-•
pad. You can utilize four keys (1-4) to categorize any noise of
interest or noise to be later excluded in the post-processing.
A typical application is categorizing any annoying industrial
noise by persons living in the neighborhood.
Limit LED: Limit Setting
H
ere you set the function
of the limit LED , thereby highlighting any sound level that exceeds the pre-set limits in orange
or red color. Further, external peripherals are controlled by the
optional Serial I/O Interface based on the sound level, such as
displaying sound levels on a large external red-orange-green
lamp. For details refer to the chapter Limits.
K
SET Correction: Setup of Correction Values
This page provides a wizard to measure correction values,
which could be helpful for compliant sound level monitoring
of live events. It measures the correction values between
the actual measurement position and the loudest position accessible by the audience. The XL2 displays and logs
the selected sound pressure levels including the correction
values, allowing the sound engineer to monitor the sound
level at the loudest position in the audience. The measurement meets the requirements of the standards DIN15905-5
and SLV. For details refer to chapter Correction Value K
SET.
25
Sound Level Meter
Set EQt, L%: Selection of measured levels
This page allows setting the following levels:
Moving Time-average Sound Level•
Gliding LAeq with selectable time window from five seconds
to one hour. Four individual levels can be configured.
Percentile Sound Level•
Allows the individual configuration of seven statistic lev-
els from 0.1% to 99.9% (optional with Extended Acoustic
Pack).
The
- Broadband Source for the calculation of the level sta-
tistics can be chosen from a set of different levels with
either a frequency weighting A, C or Z. The time weightings F, S and the moving time-averaged sound level for one
second are supported.
26
Sound Level Meter
Overview
Numeric Result Page
The numeric result page 123 SLMeter displays the selected
broadband sound level results. You can change the font size of
the result. Depending on the font size chosen, the XL2 shows
three or five results simultaneously. Individual frequency
weighting, time weighting, actual, minimum, maximum and
correction values can be chosen for each displayed result.
8
1
2
3
7
6
4 5
Real-Time Analyzer Page
The real-time analyzer page RTA measures and displays
the 1/3 or 1/1 octave spectrum from 6.3 Hz to 20 kHz including
wideband results. The real-time spectrum RTA is measured in
parallel with the A and Z-weighted wideband levels.
17
9
10
11
12
13
16
15
14
27
Sound Level Meter
1
Sound Level Result 1
All sound levels are measured and logged simultaneously.
You select which sound levels should be displayed.
Change Parameter
Turn the rotary wheel •
Press enter •
to open the selection menu and choose
to select the parameter Lxx.
the wideband sound pressure level to be displayed.
Turn the rotary wheel •
parameters and confirm with enter
to select the required test result
.
Change Font Size
Turn the rotary wheel •
Press enter •
1x, 2x or 3x to set the font size to small,
to select the actual test result.
medium or large.
The XL2 shows 3 sound levels on the display if a large font
is chosen, otherwise it shows 5 sound levels.
2
Sound Level Result 2 & 3
Follow the setting instructions for sound level result 1.
3
Sound Level Result 4 & 5
To display sound level results 4 & 5, choose a smaller font
for all results. Follow the setting instructions for sound level
result 1.
4
Input Range
The XL2 Analyzer provides three input ranges to accommodate the wide range of input signals. The individual ranges are based on the microphone sensitivity setting in the
calibration menu of the XL2. For example at a sensitivity
S=20mV/Pa the input ranges are
Lower range: 10 - 110 dBSPL•
Middle range: 30 - 130 dBSPL•
Upper range: 50 - 150 dBSPL•
Select the lowest possible input range according to the
maximum level expected during the measurement; e.g., if
the sound pressure will always be below 110 dBSPL, then
select the lowest input range 10 - 110 dBSPL.
5
Run Indication
The run indication shows the measurement status running,
paused or stopped. Various measurement settings are
locked during ongoing measurements, such as changing
the input ranging or the preset measurement time.
28
Sound Level Meter
6
Actual Measurement Time
Counts actual measurement time in hrs:min:sec. Supports
time modes: continuous, single and (synchronized) repeat.
Timer Mode Continuous
(applicable for standard measurements)
All values are recorded and monitored continuously after starting a measurement with start
The actual measurement time is shown.
Timer Mode Single
Automatically stops the measurement after the
pre-set measurement time.
Set the required measurement time.•
Start the measurement •
The actual measurement time counts back to zero and
the measurement ends.
All measurement results may be recalled.•
.
Timer Mode Repeat
Provides automated repeated measurements with
user-defined, preset measurement time cycles.
Set the required measurement time.•
Press start •
.
The actual measurement time counts back to
zero. When the preset measurement time has
elapsed, the measurement time and the measurement results are reset and a new measurement is started. All measurement results
of the previous cycle are reset.
For consecutive storage of all measurement cycles, select the parameter Naming+Saving: auto
in the memory menu. Each individual cycle result
is then automatically stored to the SD Card.
.
29
Sound Level Meter
Timer Mode Repeat Synchronized
Provides automated repeated measurements synchronized to the XL2 real-time clock.
Press start
to begin the measurement.
In order to align the selected preset measurement
time with the real-time clock, the XL2 shortens
the first cycle to match the real-time clock synchronization. All following measurement cycles
are synchronized to the real-time clock.
8
Phantom Power Supply
48V T
ASD An NTi Audio measurement microphone with
he XL2 provides 48 V phantom power supply
to the connection microphone or sensor.
automated sensor detection ASD is connected. The XL2 reads the electronic data sheet of
the microphone and switches the 48V phantom power automatically on
For example, the cycle time setting is 30 minutes
and the measurement starts at 7.50 a.m. -> the
first test cycle measures from 7.50 - 8.00 a.m.
Thereafter a new test cycle starts automatically
for 30 minutes. The 30-minute cycles repeat until
the measurement is stopped.
The measurements in the synchronized repeat
timer mode start exactly on the half or full hour in
accordance with DIN 15905.
7
Preset Measurement Time
Adjustment of preset measurement time for single and repeat timer setting.
48V Phantom power is switched off.
9
Result Symbols / Capture
This field offers two functions:
Symbols for measurement results •
Upper RTA parameter displayed as line.
Lower RTA parameter displayed as bargraph.
15
30
Sound Level Meter
Capture•
One of the displayed RTA readings may be captured. Any
measurement data can then be compared with this captured reference live on the XL2 Analyzer. For example,
compare the RTA spectrum of the left and right speakers.
Select the parameter to be captured• .
Confirm with enter •
Select the upper RTA parameter •
Capt.
Confirm with enter •
The lower RTA reading can be compared with the previ-
ously-captured reference data.
10
Measurement Result
Actual level result of the indicated frequency band. The cursor readout displays the center frequency and the level of
the band pointed to by the arrow.
, to capture the reading.
15
and choose
.
11
Y-Scale setting
Select the Y-Axis with the rotary wheel •
with enter
.
and confirm
Select the zoom factor between • 20, 10, 5, 2.5 dB/div
and confirm with enter
.
Scroll up and down with the rotary wheel • to select the
Y-axis range.
Confirm with enter •
12
RTA Measurement Result
.
Real-time analyzer results in 1/1 octave or 1/3 octave band
resolution. Adjust the resolution at
13
X-Scale setting
17
.
Toggles X-scale range between
20 Hz - 20 kHz RTA levels including wide band results
6.3 Hz - 8 kHz RTA levels including wide band results
Upper parameter displayed as line.
Lower parameter displayed as bargraph.
6.3 Hz - 20 kHz RTA levels
Select the X-Axis with the rotary wheel • and confirm
with enter
.
Toggle with the rotary wheel • between the ranges.
Confirm with enter •
.
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