Rohde & Schwarz UPV-K7 User Manual
PAD-T-M: 3574.3259.02/01.00/CI/1/EN
R&S®UPV-K7
Software for Hearing Aids Tests
Operating Manual
Version 2.0.0.20
Operating Manual
1401.9353.12 – 04
© 2019 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Munich, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
E-mail: info@rohde-schwarz.com
Internet: http://www.rohde-schwarz.com
Subject to change – Data without tolerance limits is not binding.
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG.
Trade names are trademarks of the owners.
1401.9353.12 | Version 04 | R&S®UPV-K7
Throughout this manual, products from Rohde & Schwarz are indicated without the ® symbol , e.g. R&S®UPV-K7 is indicated as
R&S UPV-K7, or R&S®UPV is indicated as R&S UPV, etc.
R&S UPV-K7 Contents
Operating Manual 1401.9353.12 - 04 3
Contents
1 Overview .............................................................................................. 6
2 Preparation and Start of the Application Software .......................... 7
2.1 Required Measuring Instruments and Accessories ................................................. 7
2.2 Installing the Software ................................................................................................ 9
2.3 Test Setup ..................................................................................................................... 9
2.4 Starting the Application Software ............................................................................10
3 Operating Concept............................................................................ 14
3.1 Options (General settings) ........................................................................................14
4 Calibration ......................................................................................... 19
4.1 Calibration Devices....................................................................................................19
4.2 Microphone Calibration .............................................................................................21
4.3 Calibration of Ear Simulator IEC 711 .......................................................................22
4.4 Entering correction values for Pistonphones .........................................................23
4.5 Calibration of Sound Source ....................................................................................23
4.6 Calibration of the International Speech Test Signal (ISTS) ...................................24
4.7 Calibration Value for Induction Coil.........................................................................25
5 Data Entry for Reporting .................................................................. 26
5.1 Operator ......................................................................................................................26
5.2 Test Object .................................................................................................................26
6 Measurements ................................................................................... 27
6.1 Functionality and Control of the Measurement Macros ........................................27
6.1.1 Zooming .......................................................................................................................28
6.1.2 Changing the Scale of the Graph ................................................................................28
6.1.3 Cursor ..........................................................................................................................28
6.1.4 Data Point Size ............................................................................................................29
6.1.5 Performing Additional Measurements..........................................................................29
6.1.6 Storing and Loading Curves ........................................................................................29
6.1.7 Storing Curves as Limit Curves ...................................................................................29
6.1.8 Entering a Comment ....................................................................................................29
6.1.9 Creating a Report.........................................................................................................30
6.1.10 Generating a Landscape Report ..................................................................................30
6.1.11 Closing the Measurement Window ..............................................................................30
R&S UPV-K7 Contents
Operating Manual 1401.9353.12 - 04 4
6.2 Customizing Measurements .....................................................................................31
6.3 Notes on Individual Measurements .........................................................................33
6.3.1 Frequency Response Measurement............................................................................33
6.3.2 Multi-Curve Measurement ...........................................................................................37
6.3.3 Saturation Sound Pressure Level Measurement .........................................................40
6.3.4 Harmonic Distortion Measurement ..............................................................................41
6.3.5 Intermodulation Distortion Measurement .....................................................................44
6.3.6 Measurement of Dynamic Behaviour (AGC Settling) ..................................................47
6.3.7 Measurement of Input-Output Characteristics .............................................................49
6.3.8 Measurement of Equivalent Input Noise ......................................................................51
6.3.9 Battery Current Measurement .....................................................................................54
6.3.10 Speech Test according to IEC 60118-15 .....................................................................56
6.3.11 Routine for Reference Test Gain Setting .....................................................................62
6.3.12 Routine for Alignment of the Hearing Aid in the Magnetic Field ..................................64
6.3.13 Electric Input Sensitivity Measurement ........................................................................65
6.3.14 Create Report ..............................................................................................................67
6.3.15 Set Switcher .................................................................................................................68
6.3.16 Start Executable ...........................................................................................................69
7 Automatic Test Sequences .............................................................. 71
7.1 Creating and Editing a Sequence .............................................................................71
7.2 Opening an Existing Sequence ................................................................................72
7.3 Using a Sample Sequence ........................................................................................72
7.4 Running a Sequence .................................................................................................72
7.5 Running a Single Measurement within a Sequence...............................................73
7.6 Reporting on Sequence Results ..............................................................................73
8 Reporting, Storing, Loading and Deleting Results ........................ 74
8.1 Result Files .................................................................................................................74
8.2 Report Settings ..........................................................................................................74
8.3 Generating a Single Report ......................................................................................75
8.4 Generating a Sequence Report ................................................................................75
8.5 Configuring the Landscape Report..........................................................................76
8.6 Generating a Landscape Report ..............................................................................77
8.7 Selection Report ........................................................................................................77
8.8 Configuring the One-Page Report ............................................................................78
8.9 Generating a One-Page Report ................................................................................79
8.10 Preview Window.........................................................................................................81
8.11 Storing and Loading Curves .....................................................................................82
R&S UPV-K7 Contents
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8.12 Deleting Results .........................................................................................................83
8.13 Automatic Backup and Restoration of the Results File.........................................83
9 Remote Control ................................................................................. 85
9.1 Preparations ...............................................................................................................85
9.2 String Buffers and Data Buffers ...............................................................................85
9.3 Sending a Remote Control Command .....................................................................87
9.4 Remote Controlled Settings .....................................................................................88
9.4.1 Selecting a device under test .......................................................................................88
9.4.2 Setting the supply voltage ............................................................................................89
9.4.3 Setting the environmental values for the reports .........................................................89
9.4.4 Measuring the supply current ......................................................................................89
9.4.5 Generating a report and storing it to a file ...................................................................90
9.5 Starting a Measurement ............................................................................................90
9.6 Continue and Done ....................................................................................................90
9.7 Reading the Results ..................................................................................................90
9.8 Status of the remotely started measurement function ..........................................91
10 Terminating the Application ............................................................ 92
11 Index .................................................................................................. 93
R&S UPV-K7 Overview
Operating Manual 1401.9353.12 - 04 6
1 Overview
Tests of basic properties of hearing aids are specified in standards IEC 60118 and
ANSI S3.22. They comprise measurement of output sound pressure level, frequency
responses, output SPL over input SPL, harmonic distortion, battery current drain and
AGC settling.
Audio Analyzer R&S UPV with option R&S UPV-K7 provides a test system which,
together with the necessary acoustic accessories, allows measurements according to
IEC60118-0:1983, IEC60118-0:2015, IEC60118-1:1995, IEC60118-2:1983, IEC601186:1999, IEC60118-7:2005, IEC60118-9:1985 and ANSI S3.22-2003.
In addition to standard measurements it is possible to create own tests by customizing
the available parameters.
With additional option R&S UPV-K71, tests according to IEC60118-15 using speech
signal can be performed.
Automatic test sequences can be compiled from the available tests, and results are
compiled for subsequent creation of test reports.
1.1
R&S UPV-K7 Preparation and Start of the Application Software
Required Measuring Instruments and Accessories
Operating Manual 1401.9353.12 - 04 7
Device
Description
Type (examples)
Hearing aid test box
Anechoic box with built-in sound source
and induction loop, feed-throughs for
the most important connection lines
R&S UPL-B7 or Interacoustics
TBS25 or B&K 4232
Measurement microphone
¼” measurement microphone for
measurement of artificial mouth output
during calibration, to be inserted into
IEC 126 2cc coupler, and for
comparison measurement
B&K 4938 with B&K 2670 or
G.R.A.S. 40BP with G.R.A.S.
26AC
Low-noise measurement
microphone
½” measurement microphone with high
sensitivity and low self-noise for speech
tests according to IEC 60118-15.
G.R.A.S. 40AP with G.R.A.S.
26AC and right-angled adapter
RA0001
IEC 126 coupler
Acoustic coupler according to IEC 126
Part of R&S UPL-B7 (with internal
microphone or with ¼”
microphone with preamplifier)
IEC 126 coupler for ½“
microphone
Acoustic coupler according to IEC 126,
for use with ½” microphone
G.R.A.S. RA0038
IEC 711 ear simulator
(optional)
IEC 711 type occluded ear simulator
with adapters for calibration and
connection to the output of the DUT,
with 1/2” - preamplifier
B&K 4157 & 2669 or G.R.A.S.
RA0045
Acoustic calibrator
Sound level calibrator or pistonphone
for calibrating the measuring
microphones
B&K 4231 or G.R.A.S. 42AB
Microphone power supply
Power supply and preamplifier for the
measuring microphone
B&K 2829, 5935L or 2690A0S2
or G.R.A.S. 12AD or 12AA
2 Preparation and Start of the Application
Software
2.1 Required Measuring Instruments and Accessories
The Audio Analyzer R&S UPV with option R&S UPV-K7 is required for the
measurements.
Acoustic devices such as measurement couplers, a calibrator and other accessories
are required for the measurements. The following equipment from Brüel & Kjær or
G.R.A.S. may be used:
Table 2-1: Acoustic accessories for hearing aid tests
R&S UPV-K7 Preparation and Start of the Application Software
Required Measuring Instruments and Accessories
Operating Manual 1401.9353.12 - 04 8
With the amplifier set to 0 dB, the microphone power supply B&K 2690A0S2 produces
too much noise for measuring idle noise and distortion. It is therefore advisable to set
a gain of 20 dB.
Theoretically the reference microphone for sound source calibration and comparison
measurement should be a free field type and the IEC 126 coupler should be used with
a pressure field type. However with a ¼” microphone the frequency response
difference is negligible up to at least 10 kHz.
When using a ½” pressure microphone as reference microphone, a good
approximation of a flat free field response is achieved if the microphone is place such
that the sound incidence is from 90 degrees relative to the microphone axis.
An external USB keyboard and a mouse must be connected to the R&S UPV.
R&S UPV-K7 does not support the use of headphones.
Do not connect headphones to the R&S UPV during hearing aid tests. High level
signals may be present at the headphone connector.
The audio analyzer must meet the following firmware requirements:
● R&S UPV firmware version 4.0.4 or higher
● License key R&S UPV-K7 installed
● For tests with speech-like signals according to IEC 60118-15, license key
R&S UPV-K71 must be installed in addition.
R&S UPV-K7 Preparation and Start of the Application Software
Operating Manual 1401.9353.12 - 04 9
2.2 Installing the Software
Acoustical Test Box
START SINGLE CONT H COPY OUTPUT
STOP OFF
1 2 1 2
UNBAL OPTICAL
BAL
UNBAL OPTICAL
BAL
UPV AUDIO ANAL YZER DC ... 250 kHz
.
110 V RMS /160 V PK CAT I
CONTROL
DATA VARIATION
ANALOG
DIGITAL AUDIO OUTPUT
POWER
DIGITAL AUDIO INPUT
ON
REM
LOCALDOWN
SHUT-
WINDOW SETUP
SCREEN
WINDOW
SCAN
PAGE
WINBAR MODIFY HIDE CLOSE SAVE LOAD PRESETHELP
0
1 2 3
4 5 6
7 8
9
. -
+/
ESC
MENU
UNDO
.
ANALYZEROVLD OVLD
F 5 F 6
F 7 F 8 F 9 F 10 F 11 F 12
GENERATOR
USB
ghi jkl m no
# A a
pqrs tuv wxyz
abc d ef
*
...
Microphone
Power Supply
in
out
Loudspeaker Cable
Battery Adaptor Cable
Coupler Cable
Telecoil Cable
ANLG AUX OUT
Audio Analyzer
R&S UPV
The application program requires key K7 to be installed. The application program and
the key are installed in the factory in case a new R&S UPV is ordered together with this
option. If the option is ordered separately, the key as well as the installation manual is
part of the delivery.
For instructions on installation of the software and update of previous versions please
see the release notes.
2.3 Test Setup
Installing the Software
Figure 2-1 Test setup and connection of external components
The following cables are required to connect speaker, induction loop and battery
voltage supply of the test box delivered with R&S UPL-B7 to the R&S UPV. The
microphone signal from the microphone power supply may be connected to the
analyzer input with a BNC cable and an R&S UP-Z1MF adapter. If a custom made
BNC to XLR cable is used, it should be made following the schematics of the R&S UPZ1MF adapter (see R&S UPV Manual, chapter “Configuring the Analog Analyzer”).
R&S UPV-K7 Preparation and Start of the Application Software
Starting the Application Software
Operating Manual 1401.9353.12 - 04 10
XLR female
3
2
1
open ends
Loudspeaker Cable
XLR female
3
2
1
6.3 mm mono jack male
Telecoil Cable
3
2
1
XLR male
D: 4 diodes: 1N4007 or similar (1A forward current)
R1: resistor 2 Ohm, 1%
R2: 2 resistors 1 Ohm, 1%
3.5 mm stereo jack male
BNC male
R1
R2
D
Battery Cable
6.3 mm stereo jack female BNC male
Figure 2-2 Connection cables for R&S UPL-B7 (Interacoustics TBS 25) test box
The cables shown in Figure 2-2 can be ordered as Accessory R&S UPV-Z7.
The cables of R&S UPL-B7 can be re-used for R&S UPV-K7. As the supply voltage is
now provided by the “ANLG AUX OUT” on the rear panel of the R&S UPV, the
following adapter is required in addition.
Figure 2-3 Adapter cable to connect the R&S UPL-B7 battery supply cable
to the “ANLG AUX OUT” of the R&S UPV
2.4 Starting the Application Software
After installation, the program can be started by double-clicking the Icon “UPV-K7
Hearing Aid Tests” or by clicking “R&S UPV Applications UPV-K7 Hearing Aid
Tests” in the “Programs” menu.
At the fist start of the program, selection windows appear for the standard according to
which the measurements should be made, and for the measurement coupler used.
R&S UPV-K7 Preparation and Start of the Application Software
Starting the Application Software
Operating Manual 1401.9353.12 - 04 11
The entered selections are stored with the settings and automatically loaded at the
next start of the program.
At each start of the program, the ambient conditions temperature, relative humidity and
atmospheric pressure are queried for protocol purpose. The entered values are not
stored in the settings, because the ambient conditions are supposed to change with
time. The query can be deselected and values can be changed any time in the
“Options” menu.
Figure 2-4 Query window for selection of applied standard
If “none” is selected in the standard selection window, all measurements appear in the
“Measurement” menu. If a standard is selected, all measurements appear in the
“Measurement” menu, but compliant measurements are checked in the menu. If “Allow
only standard measurements” is checked, non-compliant measurements are
suppressed in the Measurement menu.
Figure 2-5 Query window for selection of ear simulator
When the checkbox “Do not show this dialog again” is checked, the corresponding
selection window will not appear at the program start in future. However, the selection
is still available in the “Options” menu (see below).
R&S UPV-K7 Preparation and Start of the Application Software
Starting the Application Software
Operating Manual 1401.9353.12 - 04 12
The next window to open is the input window for the ambient conditions temperature,
relative humidity and atmospheric pressure.
Figure 2-6 Query window for input of ambient conditions
The units can be switched between °C and °F and between kPa and mmHg,
respectively. After the last of the three selection windows has been closed, the main
window of the R&S UPV-K7 opens.
Figure 2-7 Main window after first start of the program
R&S UPV-K7 Preparation and Start of the Application Software
Starting the Application Software
Operating Manual 1401.9353.12 - 04 13
Initially, the data grid in the center of the screen which shows the result overview is
empty. The screenshot below shows an example after a number of measurements
have been made.
Figure 2-8 Main window with results
R&S UPV-K7 Operating Concept
Operating Manual 1401.9353.12 - 04 14
3 Operating Concept
3.1 Options (General settings)
Options (General settings)
Figure 3-1 Options menu
The “Options” menu in the main window allows to change a set of general settings like
ear simulator, test method and battery voltage, which are valid for all or at least a
plurality of the tests.
“Continuous current measurement” allows to measure the supply current at
analyzer input 2. This option can only be selected with the substitution method. The
value of the shunt resistor for the current measurement can be entered in the
calibration menu. By default it is set to 2 Ω.
“Measurement frequency range” allows to enter the frequency range in which the
sound source is calibrated. In general this will be 100 Hz to 10 kHz which is the default.
“Number of points” specifies the number of (logarithmically spaced) frequencies
measured for the sound source equalization.
“High pass (rumble) filter” allows to set a high pass filter which is active in most
measurements except distortion measurements, battery current measurements and
noise measurements. The edge frequency of the high pass filter can be set, and the
filter can be activated and deactivated. The high pass filter is not applied to battery
current measurements.
R&S UPV-K7 Operating Concept
Options (General settings)
Operating Manual 1401.9353.12 - 04 15
Filters slow down the measurement. Therefore they should only be used if necessary.
In particular a combination of selective measurement with high pass and / or low pass
filter is not recommended.
If “File defined” is deactivated, the edge frequency can be set in the “Limit frequency”
field. The R&S UPV firmware then calculates the filter coefficients and the delay to
account for the filter settling. If “File defined” is activated, a file with filter coefficients
can be loaded using the “Browse” button. A measurement delay for the filter settling
time can be set manually if the “Def. delay” checkbox is activated.
Figure 3-2 Input window for filter settings
“Low pass (hiss noise) filter” allows to set a low pass filter which is active in most
measurements except battery current measurements and noise measurements. The
edge frequency of the high pass filter can be set, and the filter can be activated and
deactivated. The low pass filter is not applied to battery current and distortion
measurements.
The settings in the “Lowpass Filter” window are according to those for the highpass
filter.
With noise measurements, the filters from the “Options” menu are only applied to the
gain measurement. The noise measurement has own parameters for the band limits of
the noise level measurement.
“Adaptive measurement (function settling)” causes gain and level measurements
to be repeated until the result has settled within a specified tolerance. This is helpful to
assure that an AGC which is present in the signal path has adapted to the applied
input signal of the hearing aid.
Figure 3-3 Input window for adaptive measurement
R&S UPV-K7 Operating Concept
Options (General settings)
Operating Manual 1401.9353.12 - 04 16
The resolution value must be set high enough to take idle channel noise into account.
If it is set too low, especially measurements with high gain at low input levels may be
aborted due to invalid result values.
If the use of filters leads to slow measurements, the timeout value may have to be
increased.
With the “Flat” type, measurements are repeated until the last “Samples” number of
results are within the given “Tolerance” or the difference between two subsequent
measurement results is below the “Resolution” value. The “Resolution” can be used to
take into account the idle channel noise of hearing aid and measurement equipment.
With the “exponential” type of settling, differences between the earlier results may be
higher than specified, but the results must converge exponentially into the specified
values.
If the settling time of the hearing aid is known, measurement may be faster with settling
turned off. In this case the known settling time has to be entered as pre-delay in the
measurement parameters of each measurement.
Function settling is generally not applied to battery current measurements. For
harmonic distortion measurements the resolution is set fix to 0.01 % THD.
“Standard” allows to select one of the available standards. Measurements belonging
to this standard will be checked in the measurement menu. If “Allow only standard
measurements” is checked, it is not possible to start single measurements which do
not belong to the standard.
If “Select standard at startup” is checked, the selection window for the standard is
opened at each start of the program.
“Ear simulator” allows to select the type of ear simulator used. For details on the
handling of calibration data see section 4 Calibration below.
If “Select ear simulator at startup” is checked, the selection window for the ear
simulator is opened at each start of the program.
“Ambient conditions” allows to change the temperature, relative humidity and
atmospheric pressure values for the protocol.
“Query ambient conditions at startup” causes the input window for the ambient
condition to be opened at each start of the program.
R&S UPV-K7 Operating Concept
Options (General settings)
Operating Manual 1401.9353.12 - 04 17
“Test method” allows to select the method for setting the input sound pressure.
Figure 3-4: Window for selection of the test method
With “Substitution”, the nominally set SPL at the input of the hearing aid is assumed to
be correct, due to the calibration of the sound source. With “Comparison”, the input
SPL is measured simultaneously with the output SPL by the reference microphone in a
two channel measurement, and results transfer measurements are corrected for the
deviation of the input SPL from the nominal value. “Comparison” cannot be selected
when the coupler microphone is used as reference microphone (see below). When the
continuous current measurement is active, an input switcher is required for the
“Comparison” method.
From IEC 60118-0:2015 it is required to adjust the input sound pressure level with the
hearing aid under test present. For sweep measurements the input sound pressure
level is measured with an extra sweep using the equalization and calibration value
obtained with the last source calibration. The deviation is subtracted as correction from
the existing values. There are options to do this for each input sound pressure level
value required in the measurement (“Subst. each”) or to do it once with a specified
default sound pressure level (“Subst. once”). As the measurement results from low
input levels can be noisy, especially when a ¼” measurement microphone is used, it is
possible to specify a minimum SPL. For all lower input levels, the sound pressure will
be adjusted with the minimum level instead. The values obtained can be re-used as
long as the same hearing aid is tested (i.e. the device under test is not changed in the
“Data” menu), or updated for each measurement. Single values are fine-adjusted in
this test mode with each measurement.
“Microphone Location MLE (IEC 60118-15)” allows to specify the location of the
hearing aid. The respective frequency correction (“location effect”) according
IEC 60118-8 is taken into account for speech tests according to IEC 60118-15.
● None: No location effect is taken into account
● BTE: Location effect for hearing aids worn behind the ear
● ITE: Location effect for hearing aids worn inside the concha
● ITC: Location effect for hearing aids inserted into the ear canal
● CIC: Location effect for hearing aids which are worn completely inside the ear
canal.
R&S UPV-K7 Operating Concept
Options (General settings)
Operating Manual 1401.9353.12 - 04 18
“Use coupler mic as reference mic” allows to use the microphone of the IEC 126
coupler for sound source calibration. In this case the program applies the calibration
value of the coupler microphone for the sound source calibration, and the reference
microphone has to be connected to analyzer input 1 instead of analyzer input 2.
If “Show operator instructions” is checked, instructions to the operator are displayed
in a message box before the measurement starts. The operator may be prompted to
position the hearing aid in a defined way or to set the volume to a certain setting.
In Menu item “Delay before closing a measurement in a sequence” a time period
can be defined for which the result of a completed measurement is shown during
execution of a sequence, before the measurement window is closed and the next
measurement in the sequence is started.
“Store results of further measurements” allows to include results obtained with the
“Add measurement” softkey to the result database. All curves obtained this way will be
reported in the same graph. This allows e.g. to measure responses depending on
settings of the hearing aid, and to report them in a field of curves.
“Store Loaded Curve Data to results” includes curve data which is loaded with the
button “Load Curve” to the result database such that the loaded curves will appear in
the diagram of the respective report.
If “Generate temporary image files” is activated, each measurement stores a
screenshot of the result graph in an image file called “”. The file can be queried by a
remote control host after a remotely started testcase has finished. It is overwritten
when the next measurement finishes successfully.
“Battery voltage” allows to specify the supply voltage for the hearing aid. If a supply
voltage is specified in the parameters of a measurement, the general setting is
overridden. This allows to measure response curves for different supply voltages within
one sequence.
“Report settings” allows to define the type of information which should appear in the
reports. For details on reporting, see section 7 Automatic Test Sequences below.
“Input Switcher” enables the use of a UPZ12 switcher, e.g. to switch the second
analyzer input automatically between the output of a reference microphone measuring
the input sound pressure of a hearing aid, and a shunt resistor for continuous current
measurement.
If “Enable Remote Control” is active, remote controlled start of testcases and
configuration via SCPI commands is possible. For details see section 9.
R&S UPV-K7 Calibration
Operating Manual 1401.9353.12 - 04 19
4 Calibration
4.1 Calibration Devices
R&S UPV-K7 allows to simultaneously store calibration values for multiple individuals
of the same type. This allows to switch devices without the requirement for recalibration. However, regular re-calibration is recommended in order to assure the
correct function of the used devices.
Calibration Devices
Figure 4-1 Calibration menu
For every device to be calibrated, an entry must be created using “Calibration New
device” in the main menu. This menu item opens an entry window to specify the
calibrated device. A category of device must be chosen from the combo box on top.
Type, manufacturer and serial number are entered into the text boxes below. The
entries are confirmed by clicking on the “Save and close” button.
Figure 4-2 Input window for information about calibrated device
R&S UPV-K7 Calibration
Calibration Devices
Operating Manual 1401.9353.12 - 04 20
Before a device can be calibrated or used, it must be selected with “Calibration
Select device” in the main menu. Clicking on this item opens a window with a table of
all entered devices.
Figure 4-3 Window for selection of calibrated devices
In the combo box lower left, a category of devices must be selected. Subsequently the
table is reduced to available devices in this category. At first startup, there is only a
“Default” device for each category, but when more devices have been created with the
“New device” function, a choice will be available in this view. In this state a row in the
table can be marked with a mouse click on its left end. A mouse click on the button
“Select” selects this device for the associated usage.
Figure 4-4 Selection window for particular device type (here IEC 126 coupler)
Subsequently this procedure may be repeated for other categories. Finally all
selections are confirmed by clicking the “Ok” button.
R&S UPV-K7 Calibration
Operating Manual 1401.9353.12 - 04 21
All calibration data are stored on the R&S UPV hard disk and are therefore
After inserting the microphone, wait about 10 s to allow for static pressure
equalization.
automatically available again after every restart. The calibration values for the
R&S UPV-K7 option are stored independently of other options.
All calibration routines below require as pre-requisite that a device for the respective
usage has been generated and selected.
To simplify the procedure for the case that it is not intended to use multiple devices of
the same category nor to include information about the used devices into a report,
there is a “Default” device selected for each device type or category after the first start
of the program.
4.2 Microphone Calibration
► Insert the measuring microphone fully into the adapter of the sound level
calibrator and switch on the calibrator.
Microphone Calibration
► Call the test routine with “Calibration Microphone 2 cc Coupler”,
“Calibration Microphone Reference” or “Calibration Microphone
0.4 cc Coupler” from the main menu, depending on the microphone.
First the nominal SPL of the calibrator has to be entered:
Figure 4-5 Input window for calibration SPL
Checkbox “Apply Correction Values for Pistonphone” allows to specify volume
correction and atmospheric correction values which are added to the nominal
calibration value to calculate the effective pressure level at the microphone during
calibration. If this checkbox is checked, the default for the nominal calibration
value is 124 dBPL. If the calibration values are deactivated, the default is 93.98
dBSPL.
R&S UPV-K7 Calibration
Calibration of Ear Simulator IEC 711
Operating Manual 1401.9353.12 - 04 22
If selective calibration is activated in the calibration menu, the frequency of the
calibration signal has to be entered:
Figure 4-6 Input window for calibration frequency
If correction values for pistonphone are used, the default for the calibration
frequency is 250 Hz. Otherwise the default calibration frequency is 1000 Hz.
After these settings have been confirmed, instructions for connecting the
microphone are displayed, unless an input switcher is used. The reference
microphone must be connected to analyzer input 2, coupler microphones must be
connected to analyzer input 1.
Figure 4-7 Connection instructions of microphone calibration
Subsequently, the output voltage of the microphone is measured and the
sensitivity displayed with reference to 1 Pa. If a mere power supply without gain is
used, the displayed sensitivity must approximately match the value in the
calibration certificate of the microphone capsule (typical value for microphone
capsule 4134 of artificial ear 4185 is approx. 12 mV/Pa, display = 120 mV/Pa). If a
conditioning amplifier with 20 dB gain (recommended value) is used, the displayed
sensitivity must be about 10 times higher. If the voltage measured is below 3 mV
or instable, an error message is displayed. Possible error sources are, for
example, a switched-off microphone power supply or a disabled calibrator. In this
case, the program requests that the calibration is repeated. After switching on the
microphone power supply, wait approx. 20 s before starting the calibration again.
4.3 Calibration of Ear Simulator IEC 711
For calibration of the IEC 711 ear simulator, an adapter part must be screwed onto the
simulator which allows it to be inserted into the calibrator like a ½” microphone. The
calibration routine is started with “Calibration Ear Simulator IEC 711” and follows
the course described above.
R&S UPV-K7 Calibration
Entering correction values for Pistonphones
Operating Manual 1401.9353.12 - 04 23
4.4 Entering correction values for Pistonphones
With the menu Item “Pistonphone” in the “Calibration” menu, volume and atmospheric
correction values can be viewed and edited. In addition the default nominal level and
calibration frequency for pistonphone use can be modified.
Volume correction values are specific to the different microphone or coupler types and
can therefore be entered separately. The atmospheric correction value is common to
all microphones and ear simulators.
Figure 4-8 Input window pistonphone correction values
4.5 Calibration of Sound Source
Before a hearing aid can be tested, the absolute sensitivity and frequency response of
the sound source have to be measured and corrected with the aid of a previously
calibrated reference microphone. If “Use coupler mic as reference mic” is activated in
the “Options” menu, the microphone of the IEC 126 coupler can be used for this
purpose. The frequency response of the microphone can be ignored in the test
frequency range (100 Hz to 10 kHz) (see also calibration certificate of microphone
capsule). If a separate reference microphone is used, this has to be calibrated
beforehand with “Calibration Microphone Reference”.
After starting the sound source calibration with “Calibration Sound Source”, the
calibration level can be defined. This allows to adapt the calibration to specific
measurement levels. It is also possible to store calibrations for different levels using
multiple calibration devices (see above).
The sound pressure generated at the point of the reference microphone is set to
exactly the specified level in an automatic measurement routine at 1 kHz. The
generator voltage required is stored in a file on the hard disk and used as a reference
for all subsequent settings with the same sound source. If the sound pressure cannot
be adjusted to the specified value, an error message is displayed with a request to
check the connection to the sound source and to repeat the measurement.
R&S UPV-K7 Calibration
Calibration of the International Speech Test Signal (ISTS)
Operating Manual 1401.9353.12 - 04 24
The uncorrected frequency response of the sound source is measured and displayed.
Next, the frequency response is measured with the inverse frequency response
correction automatically selected in the generator (equalization). Residual errors
caused by nonlinearities of the speaker are measured and taken into account in the
final equalization file as fine correction.
To verify the results, the absolute sound pressure versus frequency is measured at the
specified sound pressure level. Correct calibration without interfering sound yields an
almost straight line.
4.6 Calibration of the International Speech Test Signal (ISTS)
This item is only available with option R&S UPV-K71 installed.
Figure 4-9 Submenu for ISTS calibration
The calibration function performs the following actions on the ISTS:
● Pre-filtering the speech signal with the inverse frequency response of the sound
source (valid sound source calibration is prerequisite)
● Level alignment of the filtered signal
● Analysis of the long-term average spectrum and percentile spectra at the
reference point and limit check in comparison to the requirements in IEC 60118-
15.
● Analysis of the speech signal at the reference point as input signal to the hearing
aid (according to IEC 60118-15). Raw results like 3rd octave spectra over time
and selected intervals in each 3rd octave for given percentiles are stored in files
for later use in the measurement function.
● Pre-filtering of the equalized signal according to the different microphone location
effects.
Standard speech levels are 65 dBSPL, 80 dBSPL and optionally 55 dBSPL.
Additionally calibration can also be performed at other levels if required. Especially for
low levels like 55 dBSPL, a low-noise microphone is required to get correct values for
the 30% percentile.
R&S UPV-K7 Calibration
Calibration Value for Induction Coil
Operating Manual 1401.9353.12 - 04 25
Before starting the ISTS calibration routine, either a coupler microphone or a reference
microphone must be calibrated. If the coupler microphone is to be used for this
calibration function, select “Options Use coupler mic as reference mic”. The coupler
microphone must be connected to analyzer input 1. If a separate reference microphone
is to be used, “Options Use coupler mic as reference mic” must be unchecked. The
reference microphone must be connected to analyzer input 2.
Figure 4-10 ISTS calibration result
For each calibrated speech level, the window contains a tab with a result graph. Each
result graph shows long-term average speech spectrum (LTASS) and percentile levels
for this speech level, together with limits calculated from the nominal levels given in
IEC 60118-15 for the ISTS at 65 dBSPL speech level ±3 dB.
The calibration is valid even if not all limits are passed. Particularly ad 55 dBSPL it
might be difficult to pass the limits for the 30% percentile.
4.7 Calibration Value for Induction Coil
The sensitivity H/I for the induction coil used for hearing aid tests with inductive input
can be entered under menu Item “Induction Coil” in the “Calibration” menu.
Refer to the data sheet of the test box for induction coil sensitivity and resistance.
R&S UPV-K7 Data Entry for Reporting
Operating Manual 1401.9353.12 - 04 26
5 Data Entry for Reporting
5.1 Operator
Under “DataOperator” an operator’s name can be entered which is stored in
association with all calibration and measurement results. If “Operator” is activated in
the report settings, the name will appear in all reports about these measurements.
5.2 Test Object
Under “Data Test object New” a description of the device under test can be
entered.
Operator
Figure 5-1 Window for input of information about a test object
With “Data Test object Select” one of the entered test objects can be selected.
The data of this selected test object will be stored in association with all measurements
and appear on the associated reports if “DUT information” is activated in the report
settings.
R&S UPV-K7 Measurements
Functionality and Control of the Measurement Macros
Operating Manual 1401.9353.12 - 04 27
6 Measurements
6.1 Functionality and Control of the Measurement Macros
Figure 6-1 Example of a measurement window
When a measurement macro is started, e.g. from the “Measurement” menu, the
standardized measurement is immediately executed. With a single measurement, the
window of the measurement macro stays open after the measurement is terminated. At
that time, the following functionality is available:
Figure 6-2 Context menu of the graph window
R&S UPV-K7 Measurements
Functionality and Control of the Measurement Macros
Operating Manual 1401.9353.12 - 04 28
6.1.1 Zooming
When the “Shift” key on the keyboard is pressed, the mouse cursor changes to the
zoom cursor. When the left mouse button is pressed, a rectangle can be marked in the
graph. As soon as the left mouse button is released, the graph is zoomed into the area
of the marked rectangle
“Zoom Out” in the graph context menu reverses the last zooming step. “Unzoom”
zooms completely out to the original scaling.
6.1.2 Changing the Scale of the Graph
“Change Scale” in the context menu opens a window in which the upper and lower
bounds of both axes can be entered by numbers.
Figure 6-3 Window for changing the scale of the graph
6.1.3 Cursor
When the item “Show Cursor” is marked in the graph context menu, a cursor is
displayed which can be dragged along the graph with the mouse. X and Y values of
the data points below the cursor are displayed.
Figure 6-4 Cursor with data display
R&S UPV-K7 Measurements
Functionality and Control of the Measurement Macros
Operating Manual 1401.9353.12 - 04 29
6.1.4 Data Point Size
“Data Point Size” in the graph context menu opens a window in which the size of
marks at the measured data points can be specified. Moving the mouse cursor over
one of the marks causes the associated X and Y values to be displayed.
Figure 6-5 Data points with data display
6.1.5 Performing Additional Measurements
The softkey “Add Measurement” triggers another measurement according to the
specification of the test. Loudness ratings and noise values are calculated and
displayed in the legend. However, limits are not checked. This function can e.g. be
used to compare different settings in a device under test.
If the item “Store results of further measurements” is activated in the “Options” menu,
graphs and result values obtained with this functionality are added to the results
database and will appear later in reports on this measurement. All curves obtained
within the same measurement will appear in the report in the same graph.
6.1.6 Storing and Loading Curves
All measured curves in the graph can be stored to an ASCII file, and stored curves can
be loaded back into the graph. The softkey “Store Curve” opens a window in which a
combo box offers choice between the legends of all measured curves in the graph. The
curve associated in which the selected entry is stored to the file at the specified
location.
6.1.7 Storing Curves as Limit Curves
With “Store As Limit Curve” a curve can be selected and stored into a R&S UPV format
limit file with a specified shift in Y axis direction. This functionality can be used to
generate limit curves from “golden” devices for evaluation purpose. Regarding the use
of such limit curves see section 6.2 Customizing Measurements below.
6.1.8 Entering a Comment
With the softkey “Enter Comment” or the item “Comment” in the graph context menu, a
comment can be entered and edited which will appear in the report about the
respective measurement.
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