IVIE IE-45 Owner's manual

Ivie IE-45 Manual
page 1
May, 2007
IE-45
Audio Analysis System
Owner's and Operator's Manual
Copyright 2007
Ivie Technologies Inc.
Lehi, UT
Printed in U.S.A.

Ivie IE-45 Manual
page 2
IE-45 IM Inputs
Introduction
Congratulations! With your purchase of the Ivie IE-45, you not only have one of the most powerful, versatile, and
accurate audio spectrum analyzers available, but you also have an analysis system that is capable of expanding
as your needs expand. The supplied microphone is a Type II microphone, making the standard IE-45, a Type II
measurement system. For those needing Type I accuracy, two optional microphone preamplifier and microphone
capsule combinations are available to convert the IE-45 analyzer to a Type I measurement system. With reason-
able care, the IE-45 will provide a long period of useful service.
This manual is intended to familiarize you with the basic operations of the IE-45, and to whet your appetite con-
cerning some of its possibilities. It is in no way intended to be the total description of all the possibilities of this
unit.
The computer supplied with the IE-45 is a Samsung® Q1, Windows® XP machine. However, this specific com-
puter is NOT required. The IE-45 software will run on many Windows® XP machines with USB ports for connec-
tion to the IE-45 Input Module, as long as they have sufficient processing power and speed to run the software at
optimum performance. If you prefer to use your laptop, for example, simply connect the IE-45 IM to it using an
appropriate USB cable, load the IE-45 software and you’re off and running!
IE-45 Software Options
A number of different software packages are available for the IE-45. Each can be purchased separately and run
independently, depending upon your measurement needs. These software packages include:
IE-45 RTA: Comprehensive real time analysis software. Comprises multiple functions from RTA to
SPL meter, to oscilloscope, to volt meter and many others. The bulk of this manual is
dedicated to a description of the functions of this software package. Where appropriate, appli-
cations are discussed as well.
IE-45 Leq: Full Featured Leq survey software. This independent software package comes with its own
manual and a separate PC software package for formatting and printing measured data.
IE-45 RT-60: RT-60 measurement software. This software package runs within the IE-45 RTA software
package, but must be purchased separately.
IE-45 STI-PA: Intelligibility measurement software. This software package runs independently.
IE-45 Record: Independent WAV file recording software. Recorded WAV files can be injected into the
IE-45 RTA software program for analysis.
Additional software packages will become available in the future as the functionality and measurement capability
of the IE-45 continues to expand.
IE-45 IM Inputs
As demonstrated across the page, the IE-45 Input Module (IE-45 IM) has four different inputs: Microphone (Mini
QG, 4-pin), two line level inputs (RCA /phono) and an additional line (SMA) input. Two of the four inputs can be
simultaneously active. The variety of input connectors allows for the convenient input of a number of different
signals from external devices.
For those wishing to remote the microphone some distance away from the IE-45, microphone extension cables
of varying lengths up to 200 feet are available from Ivie.

Ivie IE-45 Manual
page 3
IE-45 IM Inputs
IE-45 Input Module (IE-45 IM)
IE-45 M Microphone.
The IE-45 M is a Type II, electret microphone. As
options, the IE-5P Microphone Preamplifier, with the
model 1201, 1/2 inch microphone capsule, or the
IE-6P Mic Preamp with the 1133, or 1134 air con-
denser capsules are available. With either of these
options, the IE-45 offers true Type I performance.
Note: The 1/1 octave, 1/3 octave,
1/6 octave and 1/24 octave digital fil-
ters of the IE-45 are Class 0.
Microphone Input Jack
Switchcraft® Mini QG, 4 pin.
Mini-B USB Jack
This connector is used for connecting IE-45
IM to a computer. The IE-45 IM is self pow-
ered over USB.
Channel 1 and Channel 2 Line Level Inputs
These inputs are gold plated RCA (Phono) jacks.
These line level inputs are used for measuring
voltages when employing the Volt Meter function of
the IE-45.
They are also used when employing the
Oscilloscope function of the IE-45, whether single
trace, dual trace or oscilloscope XY measurements.
Auxiliary Line Input
This input is a gold plated
SMA connector.
While not presently
employed in the current
features of the IE-45, it is
intended for use in future
software packages for the
IE-45 such as vibration
measurement.

Ivie IE-45 Manual
page 4
IE-45 Controls
IE-45 Controls
As demonstrated across the page, the IE-45 makes use of a number of different controls, both software and
hardware based. The controls can be divided into three categories: 1) Hardware Buttons, 2) Software Defined
Stylus Buttons and 3) Pull-down Menus. Like the stylus buttons, the pull-down menus are touch-activated using
the stylus.
Hardware Buttons
The IE-45 software defines the use of some of the Samsung® Q1 hardware buttons, as shown across the page.
The “joystick” up/down button can be used, for example, to move the displayed signal up or down on the Q1 dis-
play. It changes the gain up or down in increments determined by the setting of the dB scale. The left/right “joy-
stick” button can be used, when the display has been stopped, to move the cursor left or right for selecting a
band of interest. Frequency and amplitude information is then displayed for the band selected.
Stylus Buttons
The stylus buttons contain many of the most used features of the IE-45. They are clearly labeled and very intu-
itive. Some duplicate the function of hardware buttons, as in the Zoom In and Zoom Out functions, shown in the
illustration across the page. The stylus buttons allow selection of the RTA display in octave, one third octave,
one sixth octave or one twenty-fourth octave. The Decay stylus button adjusts the display averaging time.
Successively tapping rotates it from Decay 1, to Decay 2, to Decay 3 and back to Decay 1 again. Many of the
averaging functions and memory functions are controlled by the stylus buttons.
These buttons also control the functions of the SPL meter, such as switching between A weighted, C weighted
and unweighted measurements, or selecting Fast, Slow, Peak or Impulse measurements. The use of stylus but-
tons is covered extensively in the sections of this manual dealing with specific IE-45 functions.
Pull-down Menus
The pull-down menus add tremendous flexibility to the IE-45. Tapping the "Function" pull-down menu, for exam-
ple, allows you to select one of the many functions of the IE-45. Choices include RTA, RTAwith an LED display
appearance, SPL Monitor, Seat to Seat (SPL variation), Strip Chart function, Polarity measurement, Oscilloscope
function, Signal Generator, Volt Meter and RT-60, if the RT-60 software module has been purchased..
The "Options" pull-down menu allows the setting of display scale and the dB level located center screen (Set dB
Scale). It also provides for RTA display weighting, allows the display of Peak Hold on the RTA screen, and
allows the selection of NC and NR measurements. The new “Spectrograph” display can also be selected from
within the “Options” pull-down menu. Additionally, entering a "Preferred Curve" is possible. It is also possible to
Play a Test WAV file, or continuously loop through a WAV file (Play Test Loop). The frequency cursor can be
activated from the “Options” pull-down menu as well, which tracks the highest amplitude on the spectrum ana-
lyzer and indicates the frequency of that highest level. This can prove extremely useful when chasing feedback
phenomenon.
The menu items in the “Options” pull-down menu are interactive with the “Function” pull-down menu. As differ-
ent functions are selected, different options for the selected function will appear in the “Options” pull-down menu.

Ivie IE-45 Manual
page 5
IE-45 Controls
Audio Output
Jack:
3/5mm stereo.
Can be used as
a headphone
jack, or as
the output for the
Signal Generator.
IE-45 Input Module
(IE-45 IM)
IE-45 Microphone:
Microphone shown is the
optional IE-5P with 1201
microphone capsule for
Type I performance.
“Joystick” Button:
It “slides” Left/Right or UP/Down:
Left/Right = Frequency Selection.
Up/Down = dB Range or dB Level.
Zoom In, Zoom Out Hardware
Buttons:
These buttons function like the
Zoom In, Zoom Out Stylus
Buttons. They change the
dB/Div. which affects the IE-45
display resolution.
Stylus Buttons:
Many of the functions of the RTA and the SPL
Meter are controlled by the Stylus Buttons.
Each function of the IE-45 will have its own set
of Stylus Buttons specific to that function.
Pull-down Menus:
These menus allow
the selection of IE-45
functions and options
within the selected
function.
dB/Division
Readout
Q1 Power On/Off,
Slider Switch:
Important Note:
Slide to the Right to
turn on. Sliding Left
brings up Windows®
Media.
Status Window:
Red = Function stopped
by user.
Green = Function run-
ning. The Status Window
also indicates the micro-
phone selected for use.
Scratch Memory Stylus Buttons:
Tapping one of these buttons (1 - 9) stores
and displays a memory. Red indicates an
empty memory. Green indicates a displayed
memory. Blue indicates the last memory
manipulated and displayed. Buff indicates
there is data in a memory, but it is not being
displayed.
Note: The hardware Button controls for the IE-45 are unique to the Samsung Q1 computer. If any other com-
puter is used, the IE-45 RTASoftware is not intended to support any hardware button functions. The hard-
ware buttons of the Samsung Q1 make the operation of the IE-45 more convenient, but they are not required
for operation. All of the functions of the Q1 hardware buttons are duplicated in the functions of the software
Stylus Buttons.
Sound Pressure Level Readout:
This readout shows SPL to a resolu-
tion of .1 dB, and indicates the SPL
weighting applied. Tapping the dB
section will cause it to readout volt-
age. Successive taps will cause the
readout to toggle from volts rms, to
volts pp (peak to peak) and so on,
back to dB SPL
Over Range and
Under Range
Indicator:
Adownward point-
ing arrow here
indicates under
range; an upward
pointing arrow
indicates over
range. The arrow
is solid while the
conditions exists,
but blinks when
corrected. It will
continue to blink
until tapped with
the stylus to
remove it.
Save Screen Button:
When tapped, this button saves
a “snapshot” of the IE-45 display
screen. It is saved to the “My
Documents” folder as a bitmap
(.bmp) file. It is named “Ivie
Screen” with a number. Each
successive screen save
increments to a higher number.

Ivie IE-45 Manual
page 6
Getting Started
Getting Started with Your IE-45
If you purchased the IE-45 complete, you will not need to install the software in the Samsung Q1, or calibrate
the microphone to the unit. All the software options you purchased will have already be installed and your unit
will have been calibrated and tested. However, if you purchased just IE-45 IM Input Module, you will need to do
some preliminary work before you can begin using your analyzer. You are probably already familiar with
installing software on a Windows® XP computer, so the following information will simply confirm what you
already know.
IE-45 Input Module (IE-45 IM)
If you purchased the IE-45 IM with the software packages of your choice, you will need to install the software
packages into the computer you wish to use. It must be a Windows® XP machine. The software packages
must be “enabled” before they will run. This enabling authorization is stored in the IE-45 IM. The IE-45 IM will
be shipped to you with each software package you have purchased already enabled. If you purchase additional
software later, it will need to be enabled. Included with the software packages is a small software program enti-
tled “Ivie Register.” You must have your computer connected to the IE-45 IM via a proper USB cable to suc-
cessfully run “Ivie Register.” This little program will interrogate the IE-45 IM and generate a number on your
computer screen. That number can be emailed to Ivie (a phone call will work as well). From that number, Ivie
can generate a second number which you must enter into the “Ivie Register” program to activate the software
package. This procedure must be followed for each additional software package you purchase.
Important Note: The software package you purchased will be “married” to your specific IE-45 IM. It will not
run unless it detects the presence of your IE-45 IM. However, the software will run on any Windows XP
computer that is properly connected to your IE-45 IM.
Beginning to Use the IE-45
As shown in the illustrations across the page, firing up an IE-45 is simple. After making sure the USB cable is
properly attached between the IE-45 IM and the Samsung® Q1, (or the computer of your choice), plug in the
microphone. Turn on the Q1 using the power slide switch. Slide it to the right, hold it for a moment, then
release it. Using the stylus, select IE-45 from the menu to begin running the software. Next, select the function
you wish to use and you're off and running.
Microphone Calibration
Whether you purchased the IE-45 complete, or just the IE-45 IM, the microphone - or microphones, if you pur-
chase more than one - will have already been calibrated to the unit before it left the factory. The calibration
information resides in the IE-45 IM. If you purchase another microphone later, you will need to calibrate that
microphone. For the calibration procedure, consult Appendix I of this manual titled “IE-45 Mic Calibration."
The supplied microphone for the IE-45 is chrome plated in color. The gold colored microphone of the IE-35 and
the silver colored (clear anodized aluminum) microphone of the IE-33 will not work with the IE-45, even though
they will plug into the IE-45 IM. The IE-45 uses a higher “phantom” voltage at the microphone input, which will
permanently damage an IE-33 or IE-35 microphone. The chrome colored IE-45 microphone is a Type II, elec-
tret microphone. Other microphones may be successfully used with the IE-45. Obviously, whenever a new or
different microphone is used, your unit will need to be recalibrated. The IE-45 is capable of storing microphone
calibrations for up to six different microphones. When a different microphone is used, it’s stored calibration
adjustment can simply be selected without having to go through a calibration procedure all over again.
These instrumentation grade microphones are sensitive instruments and should be carefully handled to avoid
damage.

Ivie IE-45 Manual
page 7
Getting Started
Step 2
Step 3
Step 1
Getting started is as easy as 1, 2, 3.....
Step 1: Connect the IE-45 IM to the Q1 or
computer of your choice using the
supplied USB cable and turn on
the computer.
Step 2: Open the IE-45 RTA program.
Step 3: Tap the “Functions” pull-
down menu and select the
function you wish to use.
You’re off and running!
IE-45 Shown with optional
IE-5P Microphone
Preamplifier and 1201
Precision Microphone for
true Type I performance.

Ivie IE-45 Manual
page 8
Real Time Analyzer Controls
Real Time Analyzer Controls
Stylus Buttons: The IE-45 is several instruments in the same package: Real Time Analyzer, Sound Level
Meter, Signal Generator, Oscilloscope etc. One of their most powerful functions is Real Time Analyzer (RTA).
To make operation simple and intuitive, the most often used controls for the RTA are labeled stylus buttons. The
illustration across the page shows the stylus buttons associated with the RTA. Displays of octave, one third
octave, one sixth octave and one twenty-forth octave are selectable as shown.
To set the level at the center of the screen (dB Level) and to adjust the dynamic range of the screen (dB per
Division), tap the "Display" menu. Next, from the pull-down menu, select "Set dB Scale." The window shown on
the IE-45 at the bottom of the opposite page shows this feature. The other functions of the pull-down menus are
covered in detail in other sections of this manual.
Decay: Display speed (averaging time) is controlled by the stylus button titled “Decay.” Decay 1 is the fastest
response time available, with Decay 2 somewhat slower and Decay 3 being the slowest. Decay 3 is intended
for use with pink noise.
Start/Stop Stylus Button: This button stops (freezes) the RTA and SPL displays and starts them again when
tapped a second time.
RTA Display On/Off: The RTA display can be turned on or off using the stylus button illustrated across the
page. Green button indicates “On,” and brown button indicates “Off.”
Average Display On/Off: The Average display (when the Average function is active) can be turned on or off
using the stylus button. Green button indicates “On,” and brown button indicates “Off.” Ared button indicates
the Average function is not active.
Memory Stylus Buttons: The IE-45 has 9 “scratch” memories (see the “Memory” section of this manual for
more information on memory and data storage). To store data in a scratch memory, tap the numbered stylus
button. A“snapshot” will be stored. If you are in the Average mode, the average curve will be stored. When a
memory is empty, its stylus button is red. Memories with data in them have green stylus buttons when being
displayed and brown when not being displayed. The last memory stored or activated for display always has a
blue stylus button. Several memories can be displayed simultaneously and each will have its own color on the
display so it can be differentiated.
Preferred Curve: The last stylus button in the row of memory status buttons is the memory status button for
“Preferred Curve.” This is a very powerful function and its use is covered extensively in the section of this man-
ual titled “RTA-Preferred Curve, Display Weighting, LED Display.”
SPL Readout Stylus Button: Tapping the SPL readout area will cause the analyzer to step through its electri-
cal measurement modes. This is very useful for looking at voltage levels simultaneously with spectral content.
Obviously, this feature should be used when measuring electrical signal, not acoustic signals through the mic.
Q1 Buttons: The IE-45 makes use of some of the buttons found on the front of the Q1. Their use is defined
as shown across the page. The “joystick” up/down function can be used to quickly adjust the display to bring
the signal to the center of the screen. Either the stylus “Zoom In” and “Zoom Out” buttons, or the two push but-
tons on the right of the Q1 can be used to adjust screen resolution.
Pull-down Menus: Additionally, pull-down menus provide more features and selection capability. Tapping the
“Function” menu at the top of the screen with the stylus allows the selection of the RTA function. The various
displays of the RTAfunction are shown in the illustration across the page. Below RTA in the Function menu is
“RTA LEDs.” Selecting this function will provide a display that looks like an LED bar graph that many are so
familiar with. The advantage of this display is that the screen resolution can be adjusted so each LED repre-
sents 1dB, 2dB or 3dB. These increments are very useful when equalizing a sound system.

Ivie IE-45 Manual
page 9
Real Time Analyzer Controls
The RTA can display four different resolutions over its 20 Hz to 20 kHz bandwidth: 1/1 octave, 1/3 octave, 1/6
octave and 1/24 octave. When a memory is stored, all four resolutions are stored. This allows a recalled mem-
ory to be viewed or printed in any resolution the user desires.
Zoom in, Zoom out
Buttons (dB per Div.)
Joystick: Up/Down controls
dB Center. Left/Right controls
Frequency Select.
dB/Division Display
RTA & SPL Meter Controls
Store/Recall Memories (1 - 9)
Average Display: On/Off Preferred Curve: Set/Display
dB Center Line
Average On/Off
SPL Weighting Select
SPL Weighting Readout:
Tap here to change to
Voltage Readout
RTA Display On/Off
RTA Display Start/Stop
SPL Response: Fast,
Slow, Peak, Impulse
To set dB Center and dB
per Division, tap “Options”
Pull-Down Menu and
select “Set dB Scale.”
1/1 Octave
1/6 Octave 1/24 Octave
1/3 Octave

Ivie IE-45 Manual
page 10
Pref. Curve, LED Display, Weighting
Preferred Curve Overlay
The Preferred Curve overlay is an IE-45 feature that allows the user to create a target overlay which can be dis-
played on the screen. This can be a valuable aid to the equalization process. Users often use a target curve to
contour the frequency response of a system to a desired result.
Creating a Preferred Curve: The preferred, or target curve, is nothing more than a line created by the user
that is overlaid on the screen to help visualize a desired result. To create a Preferred Curve, tap the PE memory
stylus button to the far right of the row of memory stylus buttons. The background on the PE button will change
to white, and the RTA display will move to a special 1/3 octave display with all bars touching the center refer-
ence line. Use the "joystick" button to move the blue 1/3 octave bar right or left to a 1/3 octave you wish to
change, or tap the desired 1/3 octave bar with the stylus. Use the joystick up/down to change the level of the
1/3 octave. Move to the next 1/3 octave and change that level, and so on. You can create a roll-off target curve
or other special spectra targets in this way.
Tap the Preferred Curve stylus button again and the background will turn green, the button text will change to
PT (preferred target), and the preferred target curve overlay will appear on-screen. Tap the button again and the
background will change to buff while the target curve is removed from the display. Tap the button again and it
changes to white as the Preferred Curve entry screen again appears so further editing, if desired, can be done.
Tap the button one more time and it turns green while the Preferred Curve is displayed.
Saving a Preferred Curve: The Preferred Curve you have created can be saved to the analyzer memory very
easily. You can save several Preferred Curves and call them back from memory as needed. To save a
Preferred Curve, tap the main screen Memory button, which will bring up the Memory Management screen.
Note that the default name of the Preferred Curve is "Preferred.ivi." Tap the "Store" button immediately to the
right of the file name and you will see a dialog box that allows you to change the name of the file to something
more descriptive (you can also change the file storage location if you wish). When finished editing, tap "OK" to
store the curve.
Loading a Preferred Curve from Memory: To load a previously stored Preferred Curve from memory, simply
tap the main screen Memory stylus button to bring up the Memory Management screen. Memory slot # 9 is
used for storing and recalling Preferred Curves. Tap the button labeled "Load" for the Preferred Curve memory
location and you will see a dialog that allows you to select the desired preferred curve. Tap "OK" and the curve
will be loaded into the Preferred Curve memory location. The IE-45 comes with one pre-loaded Preferred
Curve, labeled "Preferred.ivi" that can be loaded into the display. It is a high end roll-off curve used as a target
for large venue sound system EQ.
LED Display: Many users are familiar with the LED display of Ivie's IE-30A analyzer. To have the IE-45 emu-
late the IE-30's LED display, tap the "Function" pull-down menu at the bottom of the main screen and choose
"RTA LEDs." The RTA display changes to "LEDs.” Tip: The LED display can be useful in interpreting ampli-
tude information on the analyzer screen. By setting the dB scale to 5 dB/division each LED represents one dB
of amplitude. By setting 10 dB/division each LED represents 2 dB of amplitude, and by setting 15 dB/division,
each LED represents 3 dB of amplitude change.
SPL Weighting and the RTADisplay: Some users prefer to see the normal weighting filters that are applied to
SPL measurements also applied to the visual spectrum of the on-screen RTA. The IE-45 allows you to choose
whether or not the RTA display will show an unweighted display or a weighted display. To apply weighting filters
to the RTA display, tap on the "Options" pull-down menu at the bottom of the screen and select "RTA Weighting."
Whatever weighting filter is selected for the SPL meter when in RTA mode (the SPL meter is in the small win-
dows in the lower right of the screen) will then be applied to the RTA display. Unchecking (by again tapping) this
selection will remove weighting from the RTAdisplay.

Ivie IE-45 Manual
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Pref. Curve, LED Display, Weighting
Entering a Preferred Curve Overlay
The Preferred Curve Overlay is a valuable aid in the equalization process. It is the electronic equivalent of draw-
ing a Preferred Cure on the RTA screen with a grease pencil. The Preferred Curve provides you with an on-
screen target curve for equalization.
Step 1: To enter a Preferred Curve, tap the red PE
(Preferred Entry) stylus button. The Preferred Curve
Entry screen will appear:
Step 2: Use the Joystick Left/Right, or the stylus to select
frequency (blue bar) and the Joystick Up/Down to set ampli-
tude until the curve entry is complete.
Step 3: Tap the “PT” Button to display the Preferred Curve
Overlay. To turn off the Preferred Curve Overlay, tap the
green PT Button. To edit the curve, tap the buff colored PT
button. Tapping the white PT Button will again display the
edited Preferred Curve.
RTA LED Display
The RTA Display can be set to an LED style display using
the Function Menu. In this mode, 5 dB/Div = 1 dB/LED,
10 dB/Div = 2 dB/LED and 15 dB/Div = 3 dB/LED.
Applying “A” or “C” SPL Weightings to the RTA Display (Using the “Options” Pull-Down Menu)
No Weighting Weighting Applied
Preferred Curve Overlay

page 12
Ivie IE-45 Manual
RTA: Peak Curves, Freq. Detection
Peak Hold Curves
The IE-45 will display peak information in addition to real time information in all of the display modes, 1/1 octave
through 1/24 octave. The peak curve is shown in violet for the 1/1 octave, 1/3 octave and 1/6 octave displays,
and in white for the 1/24 octave display screen, as shown in the illustration across the page. The peak curve
data represents the highest levels that have been reached across the spectrum. In addition to peak data, real
time information is also displayed.
To activate the Peak Hold function and display the peak hold curve, tap the “Options” pull-down menu and select
"Peak/Hold Curve." You can toggle through the various display formats (1/1 octave to 1/3 octave, etc.) while the
Peak Hold function is active. However, when selecting different display formats, the peak hold information will
not be preserved from display to display. Instead, it will initialize and begin again as though it had just been acti-
vated. To turn the Peak Hold function off, select "Peak/Hold Curve" again. Note: If you store spectral data in a
scratch memory when the Peak Hold function is activated, real time data, not the peak curve, will be stored.
Frequency and Amplitude Detection
Several different modes of frequency and amplitude detection are provided by the IE-45. All of them, including
the Frequency Detect indicator, operate in all resolution settings, 1/1 octave, 1/3 octave, 1/6 octave and 1/24
octave.
For real time data, a frequency detect cursor can be activated which constantly searches the spectra and dis-
plays the frequency of the highest level found in the spectrum. Real time data, or peak hold data, can also be
frozen using the "Stop" stylus button, and then be interrogated for frequency information using a provided cursor,
as demonstrated in the illustration across the page. The cursor can be moved using the stylus or the joy stick.
Additionally, any recalled and displayed memory can be interrogated for frequency information in the same man-
ner.
Frequency Detect: To activate the Frequency Detect mode (especially useful when searching for feedback fre-
quencies), tap the “Options” pull-down menu and select "Freq. Detect." The Frequency Detect indicator will
appear on screen and begin to search for and identify the frequency registering the highest level. To turn off the
Frequency Detect indicator, select "Freq. Detect" again.
RTA Cursor: To activate the RTA Cursor, first tap the stylus button on the bottom left labeled "Stop." This will
"freeze" the RTA display and the bar below the SPL readout will change from green to red. Next, press the left
or right joystick. The frequency cursor (a red + in 1/24 octave or a green bar in 1/1 octave, 1/3 octave or 1/6
octave) will appear on the curve. The cursor can be moved left or right using the left and right controls of the
joy-stick, or by using the stylus to tap, and thereby select, a new position. As the cursor moves, frequency and
amplitude will be indicated in the SPL readout window and all areas of interest can be interrogated. To turn off
the RTA Frequency Cursor, tap the "Start" stylus button to return the analyzer to its real time display.
Peak Cursor: When the "Peak Hold Curve" is being displayed, peak hold data can be interrogated using the
Peak Cursor. To accomplish this, first, turn on the Peak Hold Curve by selecting it from the ”Options” pull-down
menu. Next, tap the "Stop" stylus button. When the display has been stopped, select "Peak Cursor" from the
“Options” menu. The joystick, or stylus, can then be used to move left or right along the spectrum to interrogate
the Peak Curve for frequency and amplitude information. Selecting "Peak Curve" again turns off this function.
Memory Cursor: This function works identically to the Peak Cursor. To activate the Memory Cursor, tap a
memory stylus button to recall the memory of interest. With the memory display on the IE-45 screen, tap the
“Options” pull-down menu and select "Memory Cursor." The Memory Cursor will appear on the curve. The cur-
sor can be moved left or right along the curve by using the left and right controls of the joystick, or the stylus. As
it moves, frequency and amplitude will be indicated. To turn off the Memory Cursor, select "Memory Cursor"
from the “Options” menu again.

Ivie IE-45 Manual
page 13
RTA: Peak Curves, Freq. Detection
Peak Curve
RTA Curve
Displaying the Peak Hold Curve
To display the Peak Hold Curve, use the “Options” pull-down menu and select “Peak Hold Curve.” The Peak Hold Curve
will be displayed in white for the 1/24 octave display, or in pink for the 1/1 octave, 1/3 octave and 1/6 octave displays.
Frequency Detect
Frequency Detect has been turned on (using the “Options”
Pull-down menu) for this 1/24 octave display. The frequen-
cy with the highest amplitude will be indicated.
RTA Cursor
Tapping the Start/Stop cursor button will “freeze” the RTA
display. The “Joystick” or stylus can be used to select a
band whose frequency and amplitude will be displayed.
Peak Cursor
With the RTA Display “Stopped” and the Peak Hold Curve function turned on, the Peak Cursor can be turned on using the
“Options” pull-down menu. It will interrogate the peak curve in the same manner that the RTA Cursor interrogates the RTA
Curve. The Peak Cursor is a green bar for the 1/1, 1/3 and 1/6 octave displays and a red + for the 1.24 octave display.
Peak Cursor

Ivie IE-45 Manual
page 14
RTA: Memory Functions
Memory Functions
The IE-45 memory system provides all the tools necessary to save various types of files to memory, rename
files, load files from memory, examine memory data, and subtract one curve from another. Most memory sys-
tem operations are performed using the memory stylus buttons and the memory management screen.
Memory Control Buttons: The memory stylus buttons are located immediately below the RTA display screen.
The row of twelve buttons allows both control of what is viewed on-screen, and the ability to store data in
"scratch memories." The far left "R" button toggles "on" or "off" the real time display. The "A" stylus button
controls the display of the Average curve. Stylus buttons 1 - 9 alternately store, remove from display, and
restore to display the contents of the nine Scratch memories. The "PE" stylus button controls "Preferred" or
"Target Curve" functions.
Stylus Button Colors: If a stylus button is red, there is nothing stored in the memory or display location asso-
ciated with the button. If the button is green, there is data present and it is being displayed. Blue is identical to
green, that is, there is data present and it is being displayed. However, blue also indicates that this is the last
memory location to be manipulated. This blue color is very useful in keeping memories straight, especially when
several memories have data stored in them. Finally, if a button is buff colored, there is data stored in that mem-
ory location, but not displayed on-screen (tapping a buff stylus button will display the data associated with that
button and change the button color to blue).
Scratch Memories: Scratch memories are "scratch pad-type" storage memories where you can temporarily
store curve data until you decide to rename and store the data permanently. You can store the RTA data you
are observing to a scratch memory by tapping a scratch memory stylus button. Regardless of the resolution set-
ting of IE-45, tapping a scratch memory stylus button saves all resolutions, 1/1 octave, 1/3 octave, 1/6 octave
and 1/24, into scratch memory.
Memory Management: Tap the "Memory" stylus button to access the memory management screen. The mem-
ory management screen allows you to store, load, and clear files from scratch memories, Preferred Curve mem-
ory, subtraction memory, and peak memory. Select a memory location you wish to store and tap the adjacent
"Store" button. You will be prompted to provide a more descriptive name for the file you are about to store. You
can also change the location to which the file will be stored, if you wish. Tap "OK" and the contents of the
scratch memory will be stored under the name and in the location of your choice. To clear a scratch memory
with or without storing it, tap the adjacent "Clear" button. A stored curve data file may be loaded into a scratch
memory location by tapping the "Load" button, selecting the file to be loaded, and tapping on the file name.
Stored Peak and Subtraction data files may also be loaded into scratch memories.
Subtract Feature: The IE-45 provides a powerful function which allows the user to subtract one curve from
another. A stored scratch memory curve can be subtracted from the real time display, or one scratch memory
curve can be subtracted from another, or from an Average curve. Tap the "Subtract" stylus button to access the
subtract control screen. From here, choose which spectrum you wish to subtract from another. Upon tapping
"S1 - S2," the RTAdisplay returns with a "0" center reference and blue RTA bars. You are viewing the one
spectrum subtracted from the other. To return to normal RTA, tap the Subtract stylus button, then "Cancel."
Peak Storage: When displaying the "Peak Hold" curve in the RTA, you can open the Memory Manager and tap
"Store Peak" to store this peak information in the peak spectrum scratch area. From here you can rename it
and store it permanently. Stored peak curve data can be loaded into any of the nine scratch memories via the
Memory Manager. Just select a scratch memory and tap "Load." Next, select the peak memory to be loaded.
Memory Files: Data stored in files can be moved to a PC using the standard Microsoft protocol from transfer-
ring data between PC’s. The analyzer always stores in all resolutions, 1/1 octave, 1/3 octave, 1/6 octave and
1/24 octave regardless of the resolution setting of the IE-45 when the memory was stored. Using Ivie's supplied
"IvieXLS-45" software, you can display, manipulate, and print data.

Ivie IE-45 Manual
page 15
RTA: Memory Functions
Store a Curve to Memory
To store a curve to memory, tap an empty (red in color)
Scratch Memory stylus button (1-9). The memory curve will
appear on screen and the stylus button will turn blue, indict-
ing that it contains data and is displaying it.
If you do not to display the curve, tap the button again. The
curve will vanish from the screen and the button will turn buff
in color indicating there is data in the memory, but not dis-
played. Both green and blue mean the data is being dis-
played, but blue indicates it was the last memory to be acti-
vated. There can be several green and/or buff buttons, but
there can be only one blue one - the last one activated.
To store a Scratch memory to main memory, tap the
“Memory” stylus button to active the memory management
window.
From left to right, the row of memory and display associated
stylus buttons mean: R = Green; RTA display active.
A= Red; Average display not on. 1 = Blue; data in memory
being displayed. 2 - 5 = Buff; data in memory, but not dis-
played. 6 - 9 = Red; memories empty. PE = Red; no data
in Preferred Curve Entry memory.
Storing a Scratch Memory to Main Memory and Loading Data from Main Memory to Scratch Memory
Tapping the red colored “Memory” stylus button brings up the main “Memory Management” window in the center above.
From this window, memories can be cleared, stored or loaded. Tapping “Store” brings up the window on the left that allows
the storing and naming of memories. Tapping “Load” brings up the window on the right that allows loading memory files from
the main memory into the various memory locations such as Scratch memory, Preferred Curve memory or Average memory.
Memory Cursor
To use the Memory Cursor, use the “Options” menu and
select Memory Cursor. Next, tap the “Stop” stylus button to
“freeze” the RTA display. Use the stylus or the Left/Right
Joystick to select the frequency of interest.
Subtract One Memory from Another and Display Result
To subtract one memory from another and display the result,
first tap the yellow “Subtract” stylus button to bring up the sub-
tract window. Select the two memories for comparison and tap
“Subtract.” The “difference” will be displayed in blue.
1. Select memories for comparison.
2. Tap “Subtract.” The blue display
would be “flat” at the 0 dB center
line if the memories were identical.
3. To exit, tap “Subtract” > “Cancel.”

Ivie IE-45 Manual
page 16
NIC and (F)STC Measurements
NIC Measurements
Sound transmission field testing of operable walls and field partitions is almost exclusively done using ASTM
E336 as the standard. The IE-45 is capable of making Noise Isolation Class (NIC) measurements. NIC meas-
urements are normally specified rather than Field Sound Transmission Class (F)STC measurements because
they are faster, easier, and therefore, less expensive to make. Field Sound Transmission Class ({F}STC) meas-
urements require RT60 information for the calculation, as well as receiving room absorption in all sixteen 1/3
octave bands of interest. The IE-45 is capable of making RT60 measurements (if the optional RT60 software
module is purchased) as well as measuring receiving room absorption in the required sixteen 1/3 octave bands.
However, since RT60 measurement capability is an option, not a standard feature, Ivie has chosen not to inte-
grate (F)STC measurement capability into the IE-45 measurement suite. The following instructions are therefore
limited to the theory of NIC measurements and making NIC measurements.
NIC is a single-number acoustical rating of sound isolation between two different spaces separated by a sound
barrier. A typical measurement example would be determining the sound isolation provided by a wall or mov-
able partition separating two rooms. To make the measurement, an omni-directional sound source would be
placed in the Source Room to energize it with pink noise. Averaged (power averaged), 1/3 octave RTA spec-
trum measurements would then be made on both sides of the wall (Source Room and Receiving Room) and
each room average would be stored to separate memory locations. The NIC calculation would begin as the
stored spectrum of the Receiving Room is subtracted from the stored spectrum of the Source Room to create a
Transmission Loss (TL) curve.
The NIC rating would then be determined by comparing and shifting the TL curve relative to the standard NIC
contour such that the TL curve is never more than 8 dB below the NIC contour in any 1/3 octave band; and the
sum of the deficiencies below the contour over the 16, 1/3 bands, does not exceed 32 dB. Once the TL curve is
shifted to meet these criteria, the NIC rating is determined by the value of the NIC contour at 500 Hz. Once the
Source Room and Receiving Room curves are stored, the curve fitting and NIC calculation are all done automat-
ically by the IE-45. Only a few taps of the stylus are required to complete the measurement and display the
results.
The step-by-step process for making an NIC measurement is demonstrated by the illustrations on the opposite
page. Note: Of particular interest in NIC measurements is the requirement for power averaged data. The
IE-45 “default” operating mode is “Arithmetic Average,” so “Power Average” will need to be selected.
Real Time NIC Measurements
This is a very useful diagnostic tool offering, unique to Ivie instrumentation. This mode allows the user to com-
pare the stored average curve in the Source Room to real time data in the Receive Room, thus providing a run-
ning calculation of NIC in real time. While in the Receive Room, the microphone can be moved to any position
around the sound barrier to find "sound leaks", weak isolation areas, strong isolation spots, etc. Because the
NIC curve and calculated number are continuously updated in real time, it is easy to quickly compare different
areas, thereby determining deficiencies relative to location.

Ivie IE-45 Manual
page 17
NIC and (F)STC Measurements
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
O
Source
Room
Receive
Room
Omnidirectional
Sound Source
Measurement
points @ 1 meter
from the wall
Store RTA Averaged
Spectrum in
Memory #1
Store RTA Averaged
Spectrum in
Memory #2
Making an NIC Measurement
Step 1. Select RTA from the Function pull-down menu.
Step 2. Make sure the Average mode is set to power
average (Average-P).
Step 3. Turn on the sound source in the Source Room.
With the RTA in Average mode, take several sets of
samples slong the wall (use the Pause/Resume but-
ton) at a distance of 1 meter. End by tapping Pause.
Step 4. Store the Average to Memory #1. Press the Count=
button to clear the Average accumulator.
Step 5. Go to the Receive Room and, from a distance of 1
meter from the wall, gather averaged samples as
in the Source Room.
Step 6. Store the Average you have gathered in Memory #2.
Press the Count= button to exit the Average Mode.
Step 7. Press the yellow Subtract/NIC button to bring up the Subtract/NIC window.
Step 8. In the S1 column, select the number 1 (Memory #1). In the S2 column, select number 2 (Memory #2). Next, tap
the NIC (S1-S2) button. The NIC contour will be displayed and the NIC number will be shown in the SPL window.
Step 9. To exit this measurement display window, tap the NIC (S1-S2) button again, then tap the Cancel button.
For NIC measurements, store the Source Room curve in
Memory #1, and the Receive Room curve in Memory #2.
Next, tap the yellow Subtract/NIC stylus button.
Select Memory #1 from the S1 column and Memory #2
from the S2 column. Next, press the NIC (S1-S2) button.
Real Time NIC, or “Sniffer” Mode
The IE-45 can perform “Real Time” NIC measurements. The real time spectrum measurement in the Receive Room is sub-
tracted from the spectrum of the Source Room stored in Memory #1. This measurement mode is unique to Ivie. You can
use it as a “sniffer” to help locate leakage paths.
Making a Real Time NIC Measurement
Step 1. Store the Average curve from the Source
Room in Memory #1.
Step 2. Tap the Subtract/NIC stylus button.
Step 3. Select Memory #1 from the S1 column.
Select “R” (Real Time) from the S2 column.
Step 4. Tap the NIC (S1-S2) stylus button.
Step 5. With the IE-45 in this mode, move along the
wall searching for sound leakage points. You
can get closer to the wall in this mode, to help
pinpoint problem areas exactly. Source
Room
Receive
Room

page 18
Ivie IE-45 Manual
RTA: Average Mode
Average Mode
The IE-45 Average Mode offers very powerful features that allow you to create continuous or triggered
averages of various types, as well as select the type of average that best suits your measurement.
Continuous Average Mode
In the RTA mode, tap on the “Average-A” stylus button. The default condition for the stylus button below the
Average button is “Cont.”, which indicates that you will be starting with a continuous average. When you tap the
Average-A button, the button text changes to “Count = X," where "X" is the number of samples so far collected.
You will see the sample number increment as the number of automatically collected data samples increases.
A blue line will immediately form on the RTA screen, which is the graphic representation of the average that is
being collected. The more samples collected, the slower this average display will change as short duration
acoustic events are encountered.
In Continuous Mode, the data sample collection can be paused by tapping Pause/Resume stylus button.
Tapping the stylus button again continues the sample taking process.
You may switch the screen presentation between 1/1 octave, 1/3 octave, 1/6 octave and 1/24 octave at any time
during an Average measurement. However, doing so will reset the data sample counter to zero and start the
averaging process over again.
Triggered Average Mode
Tapping the “Cont.” stylus button will switch it to “Trigger.” In this mode, data samples for averaging are taken
only when the user manually triggers a sample. Triggering a sample can be done by tapping the “Add” stylus
button. Each time a data sample is added by triggering a sample, the sample count on the Average button will
increment by one.
You can manually clear an Average Curve and reset the data sample counter to zero at any time by tapping the
“Clear” button. To exit the Average mode tap the “Count-X” stylus button.
Average Type Selection: The IE-45 Average Mode offers the power of two types of averaging. The Arithmetic
Average (Average-A) does straight arithmetic averaging. This type of average is probably best when you are
viewing the RTA screen while doing active equalization, or other dynamic, spectral adjustments. You may switch
the averaging mode to “Power Average (Average-P), which is probably more useful in measurements where the
total sound power is of prime importance - measurements such as transmission loss, or noise isolation.
Switching from Average-A to Average-P is done by tapping the "File" pull-down menu. Select "Preferences"
next, and from that menu, select either Power Average or Arithmetic Average.
Viewing an Average Curve: While the average is being taken, the blue average line is seen in the RTA screen.
To see this line more clearly, you can temporarily remove the real-time data from the display. This is done by
tapping the green “R” button immediately below the RTA display (see figure on the opposite page). Don’t forget
to turn the real-time display back on when you’re done . . . It’ll save you a call to Ivie Tech Support!
Storing and Loading an Average Curve: When an Average Curve is displayed on the RTA screen, it is what
will be stored when you choose to store a curve. With this in mind, an Average Curve is stored in the same way
any other spectrum is stored. Simply select an empty scratch memory location (red stylus buttons indicate
empty memory locations) and tap it. The Memory Manager ("Memory" stylus button) allows the storing of any
scratch memory as a file. Similarly, stored curves can be loaded into any standard scratch memory location by
opening the Memory Manager and selecting “Load” for any of the scratch memory locations.

Ivie IE-45 Manual
page 19
RTA: Average Mode
Average Mode
The Average Mode of the IE-45 allows taking samples one at a time, or continuously, as desired. The IE-45 also provides the
ability to do an arithmetic average, or a power average. To begin an Average measurement, tap the “Average” stylus button.
Note: The Average button will read “Average-A” if in the arithmetic average mode, or “Average-P” if in the power average
mode.
The stylus button directly below the Average button allows selection of either continuous (”Cont.”) or “single-shot” (“Trigger”)
measurements. The next button down allows a pause or resumption of measurement when in the “Continuous” mode, or
adding a single “shot” to the averaging accumulator when in the “Trigger” mode.
“Continuous” Mode Selected “Trigger” Mode Selected
Green = Average Display On.
Buff = Real-Time Display Off.
With Average Curve displayed, tap an empty (red color)
Scratch Memory to store the Average Curve.
Average Measurement Steps
Step 1. Select either the Continuous (Cont.) or Trigger mode for averaging. The
Continuous mode will automatically take sample after sample until the
“Pause/Resume” button is pressed. The Trigger mode will take only one
sample each time the “Add” button is pressed.
Step 2. Select either Power Average or Arithmetic Average. This is done using the
“File” pull-down menu > Preferences > Power or Arithmetic Average.
Step 3. Tap the “Average” stylus button to enter the Average mode. The “Average”
will be relabeled “Count=X.” "X” equals the number of samples taken and
will increment with each tap of the “Add” button, if in the Trigger mode, or will automatically increase as samples are
added, if in the Continuous mode. Tapping the “Pause/Resume button will pause or restart sample taking.
Step 4. Store the Average Curve, if desired, as shown below.

Ivie IE-45 Manual
page 20
Spectrograph Display
Spectrograph Display
An example of the Spectrograph Display is shown across the page.
To select the Spectrograph Display, the IE-45 needs to be in the RTA mode. The steps to select the
Spectrograph display are: First, tap “Functions” to activate the Functions pull-down menu. Select RTA. Next,
from the “Options” pull-down menu, select “Spectrograph.”
The Spectrograph Display shows frequency along the X axis and time along the Y axis. At the bottom of the
screen is the strip of color that shows the spectral response as it is occurring. The next strip up the screen
(going back in time) is the previous measured spectral response. The strip behind it is the measurement previ-
ous to that, and so on, all the way back in time to the top of the screen.
The number of strips is controlled by the left/right paddle buttons on the Samsung® Q1 as shown across the
page. Increasing the number of strips makes each strip more narrow, hence, there are more strips on the
screen. The range of selection available is from 2 strips to 256 strips on the screen. The time represented by a
full screen depends upon the number of strips selected. The middle of the screen thus corresponds to half the
time of a full screen, and is time marked. For example, a screen marked in the center as “1.5s” would represent
a full screen of 3 seconds of elapsed time between the real time measurement displayed at the bottom of the
screen and the oldest measurement displayed at the top of the screen. In addition to marking elapsed time, the
information at the center of the screen details the number of strips, half-screen, that have been selected. Thus,
a marking of “1.5s(64) indicates a full screen of 3 seconds, a half screen (where the marking occurs) of 1.5 sec-
onds and 128 strips of measurement data on a full screen, or 64 strips on a half-screen. Obviously, increasing
the number of strips displayed increases the full-screen time represented.
Each strip is split into bands whose width depends on the display mode you have selected in RTA - 1/1 Octave,
1/3 Octave, 1/6 Octave or Maximum Resolution. So, for example, if you have selected 1/1 Octave mode, the
strip has 10 bands. Amplitude in each band is represented by color. The color is red when the amplitude in that
band exceeds the level indicated by the top of the screen when in standard RTA mode. The color is blue when
the amplitude is lower than the level at the bottom of the screen in the RTA mode. So, for example, when in the
standard RTA mode you have the scale set so that 50dB is at the bottom and 100dB is at the top, when you
switch to Spectrograph, any band lower than 50dB will show blue, and anything higher than 100 will show red,
with a spectrum range from blue to red in between.
You can, of course, adjust the dB limits while in Spectrograph mode by using the Options Menu and selecting
“Set dB Scale.” You can also use the Zoom In/Out buttons on the Samsung® Q1.
While in Spectrograph mode you can, as usual, stop the display, or start it again by using the Stop/Start, stylus
button.
Spectrograph Usage
One use of the spectrograph display is to graphically capture short duration, or transient phenomena - such as
cymbal crash, or the sound emitted by an impact hammer. The spectrograph display allows the exploration of
spectral content of such short duration events.
Another potential application for the spectrograph display is loudspeaker testing. Feeding an impulse signal into
a loudspeaker while watching the spectrograph display can help identify cabinet resonances, as well as provid-
ing other valuable information.
Spectrograph displays are routinely used by speech analysts.