Wohler Pandora User manual

Pandora
Loudness Analyzer
User Guide
Software Version: V2.30
Part Number 821018, Revision J
Pandora requires an Apple iPod touch®
(4th generation)
which is not included with the unit.

821018: Pandora User Guide
© 2012 Wohler Technologies, Inc. All rights reserved.
ii
2012 Wohler Technologies, Inc. All rights reserved.
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Last Update
May 23, 2012

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Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Introduction ................................................................. vii
Overview................................................................ vii
Topics .................................................................... vii
What Is Loudness? ....................................................... viii
What’s New in Pandora?..................................................ix
Chapter 1. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Introduction ...................................................................1
Overview..................................................................1
Topics ......................................................................1
Safety ..........................................................................2
FCC Compliance..............................................................2
Pandora Overview ...........................................................3
Front Panel...............................................................3
Rear Panel................................................................4
Installing the Software Upgrade ........................................5
Requirements ...........................................................5
Instructions..............................................................6
Creating an Apple Account ....................................6
Logging in to the App Store ................................7
Transfering the Wohler Loudness Application
into the iPod touch...............................................8
iPod touch Installation .....................................................8
Chapter 2. Configuration and Operation . . . . . . . . . . . . . .11
Introduction .................................................................11
Overview................................................................11
Topics ....................................................................11

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Initial Setup..................................................................12
Setting the iPod touch Brightness...............................12
Upgrading the Firmware ...........................................13
Configuration................................................................15
Set Reference .........................................................15
Channel Function.....................................................19
Set Periods .............................................................22
Logging..................................................................25
Password Settings....................................................26
Creating a New Password....................................26
Changing an Existing Password............................27
Removing an Existing Password ...........................27
Using a Password...............................................27
Mode .....................................................................28
Window..................................................................28
Operation.....................................................................30
Operational Modes ...................................................30
Continuous Mode ...............................................30
Manual Mode.....................................................30
Meter Screen and Histogram Screen Controls ..............31
Alarm Indicators......................................................32
Using the Demo Source ............................................33
Chapter 3. Log Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Introduction..................................................................35
Overview................................................................35
Topics ....................................................................35
About Log Data .............................................................36
Creating New Log Files .............................................36
Manual Mode.....................................................36
Continuous Mode ...............................................37

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Both Modes.......................................................37
Log File Contents.....................................................38
Header Data .....................................................38
Record Data......................................................39
Emailing the Log File......................................................40
Creating a Line Graph....................................................46
Downloading the File................................................46
Creating the Graph..................................................49
Chapter 4. Features and Specifications. . . . . . . . . . . . . . .53
Introduction .................................................................53
Overview................................................................53
Topics ....................................................................53
Features ......................................................................54
Specifications ...............................................................55
Appendix A. Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Appendix B. References . . . . . . . . . . . . . . . . . . . . . . . . . .61

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Preface
Introduction
Overview
The preface lists the new features and functionality for the V2.30
release.
Topics
Topics Page
Introduction vii
What Is Loudness? viii
What’s New in Pandora? ix

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Preface
What Is Loudness?
What Is Loudness?
The familiar audio metering standards of VU and Quasi-PPM,
developed in the 1930's for telephone and radio signal measurements,
were conceived before more recent psychoacoustic research defined the
true characteristics of human hearing response across different
frequencies, listening levels and listening time periods. The 300
milliseconds response time of the VU meter, originally useful for voice
level measurements in telephony and tape head saturation in music
recordings, only roughly approximates the perceived loudness we
hear. The quicker 5-10 milliseconds response times of (Quasi-)PPM
meters, while much better than VU for measuring the clipping or
saturation potential of transient peaks, is actually less useful as a
loudness meter.
Their continued use in digital audio applications was mostly for lack of
something better and familiarity, rather than defining new audio level
measurements suitable for the greater amplitude dynamic range and
frequency bandwidth afforded by the digital audio equipment now
used predominantly by television producers and broadcasters. In
response to television viewer objections worldwide, the broadcast
community has developed new loudness and peak level metering
standards for industry users to accurately measure and standardize
their audio levels across channels, programs and breaks.
Loudness Units (LU) are relative to a reference level (defined by the
ITU or EBU standard chosen) in dB. LU is replacing VU for listening
level measurements because of its strong correlation with perceived
loudness as confirmed by listening studies. LU meters' nominal target
level is zero (0) as with VU meters. LKFS and LUFS are the absolute
units as named in ITU and EBU standards, respectively, and are
negative numbers in dB below 0 dBFS maximum on equivalent digital
scales.
True Peak (TP) measurements are made by 4x oversampling the audio
signals so that all but the shortest peaks are more accurately measured.
TP is intended to replace PPM measurements for the purpose of
maintaining equipment headroom. True Peak units are absolute level
negative numbers in dB(TP) equivalent to digital scale dBFS. The
maximum allowed TP level being raised above the former PPM
threshold reflects its improved accuracy.
Refer to the international standards listed in Appendix B: References on
page 61 for more information concerning history and theory of
loudness. Or you can just continue reading this manual as needed to

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Preface
What’s New in Pandora?
become familiar with the ins and outs of the new metering applications
and protocols. What does it all mean in a nutshell? Whether you are in
ITU or EBU "governed" countries, keep your Loudness between -22 and
-24 (absolute LKFS or LUFS units) and stay below -2 dBTP for any and
all peaks— and your audio is within specification.
What’s New in Pandora?
In this software release, we listened to your requests and as a result, we
have added many new features and functionality.
1. In manual mode, when you press the Stop button, the system
deletes the fast/momentary/short/integrated number since it is
no longer relevant.
2. Integrated loudness is now synchronized with average loudness.
3. The application version number displays at the bottom of the
Setup Menu.

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CHAPTER 1
Installation
Introduction
Overview
This chapter describes the physcial controls and connectors of Pandora
as well as how to download and install the software and install the iPod
touch into the Pandora case.
Topics
Topics Page
Introduction 1
Safety 2
FCC Compliance 2
Pandora Overview 3
Installing the Software Upgrade 5
iPod touch Installation 8

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Chapter 1 Installation
Safety
Safety
1. Read, keep, and follow all of these instructions; heed all warnings.
Use only a dry cloth to clean the equipment.
2. Do not block any ventilation openings.
3. Do not install near any heat source such as a radiator, heat register,
amplifier, or stove.
4. Select the correct wall plug blade adapter corresponding to the
power outlet, and install into the power supply provided.
5. Protect the power cord from being walked on or pinched,
particularly at plug’s source on the equipment and at the socket.
6. Use only the attachments/accessories specified by the
manufacturer.
7. Unplug the equipment during lightning storms or when unused
for long periods of time.
8. Use of a cart is neither recommended nor approved by Wohler.
9. Refer all servicing to qualified service personnel. Servicing will be
required under all of the following conditions:
•The equipment has been damaged in any way, such as when
the power-supply cord or plug is damaged.
•Objects have fallen onto the equipment; or the equipment has
been exposed to rain or moisture, or liquid has been spilled
onto the equipment.
•The equipment does not operate normally.
•The equipment has been dropped.
FCC Compliance
This equipment has been tested and found to comply with the limits for
a Class A digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
WARNING: Do not use this equipment near water, rain or moisture.

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Chapter 1 Installation
Pandora Overview
interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Pandora Overview
Front Panel
Pandora’s front panel is shown on Figure 1–1 below.
Figure 1–1 Pandora Front Panel
•Home: Pressing this button on the Apple iPod touch (not included)
displays the application selection menu.
Home Button
Touch Screen
Desktop Stand

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Chapter 1 Installation
Pandora Overview
•Touch Screen: The screen serves as both the loudness meter
display and the touch screen interface through which you configure
Pandora. Refer to Configuration on page 15 for details.
•Desktop Stand: Pandora comes with a desktop stand pre-installed.
Rear Panel
Pandora’s rear panel is shown in Figure 1–2 below.
Figure 1–2 Pandora Rear Panel
•AES Inputs (BNC-F, 1 through 4): These four (75 ) inputs receive
standard signals:
•Two channels: 1 pair, or
•5.1 channels: 3 pairs, or
•7.1 channels: 4 pairs.
When the input signal is two-channel, only AES In 1 is used. AES
In 1 is the default two channel input for stereo signals, but any
DC Power
AES Inputs
SDI Input

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Chapter 1 Installation
Installing the Software Upgrade
AES In jack can be used after reassignment in Channel Function
menu.
•SDI Input (BNC-F): This (75 ) input receives standard 3G/HD/
SD-SDI input. Up to eight channels in two groups can be
de-embedded and monitored.
•Power (DC): Receives a 9 VDC coax-type (center pin positive)
power connector.
Installing the Software Upgrade
In this section you will download and copy the free Wohler
Loudness application from the iTunes App Store SM to the iPod.
Requirements
•Mac or PC with an Internet connection
•The USB cable that came with your iPod touch
•The Pandora case and the power supply that came with it
•The iPod touch (4th generation)
•Credit card (for your Apple account if you do not yet have one)
Note: Pandora does not decode Dolby bitstreams, although it
can monitor discrete 5.1 and 7.1 channel configurations.
Important: If you do not already have an Apple account, you must first create one.
Follow the instructions below.
Otherwise, if you do already have an Apple account, connect the iPod
to your computer with the USB cable; launch the iTunes application;
and skip to Logging in to the App Store on page 7.

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Chapter 1 Installation
Installing the Software Upgrade
Instructions
Creating an Apple Account
1. Download and install the latest version of iTunes from
www.iTunes.com/download onto your PC or Mac. (The iTunes
application is free.)
2. Connect the iPod's USB cable to the iPod touch and to the USB port
on your computer.
3. Launch the iTunes application on your computer.
4. After your computer recognizes the connected iPod touch, the
iTunes application will display the Welcome screen.
5. When the Apple ID screen displays, click I do not have an
Apple ID and click Continue.
6. When the Register Your iPod screen appears, fill out the
requested information. Note that the screen should display your
iPod's serial number. Click Submit.
7. When the Terms and Conditions and Apple Privacy Policy
screen displays, read the terms, check the box at the bottom, and
click Continue.
8. When the Create Apple ID screen appears, enter your password
(twice), a security question and answer, and your birth date, and
then click Continue. Save your ID and password for future use.
9. When the Provide Payment Information screen appears, enter
your information. Click Submit.
Note: You will receive an email in the account you listed in your
Apple account verifying your new credentials.

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Chapter 1 Installation
Installing the Software Upgrade
Logging in to the App Store
1. In the iTunes application window, click on the iTunes Store
(under Store) in the left pane.
2. At the top of the application window, click App Store.
3. At the top right corner of the application window, type wohler into
the Search Store field.
4. Click on wohler loudness.
5. Click on FREE.
6. In the iTunes dialog, enter your Apple ID and Password, then
click Get. (Wait until the application has downloaded. This
process should take less than a minute.
7. When prompted for verification, re-enter your credit card
information as needed.
8. Connect the iPod touch to the USB cable that came with it, and
connect the other end of the cable to your computer. As soon as
your computer recognizes the iPod, it will display the name of the
iPod in the Devices section (left frame).
Decision Point:
You can install the software using your laptop (described in the steps
below this decision point) or you can download the software directly
to your iPod described in the steps immediately below.
1. Run the App Store app on the iPod touch/iPad.
2. Select the Search tab at the bottom on the application.
3. Enter Wohler Loudness in the search field and touch the Search
button.
4. Select the Wohler Loudness app from the list.
5. Touch the Install button.
6. Enter your Apple ID password.

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Chapter 1 Installation
iPod touch Installation
Transfering the Wohler Loudness Application
into the iPod touch
1. Click the name of your iPod under Devices in the left pane.
2. At the bottom right corner of the application window, click Sync.
Wait for the sync to complete.
3. Before you can disconnect the iPod touch from the USB cable, you
need to discontinue communications between the iTunes
application and the iPod touch. Click the up arrow to the right of
the name of the iPod in the Devices section (left frame).
Figure 1–3 iTunes Application: Devices
4. Now you can close the iTunes application and disconnect the
iPod touch from the USB cable.
iPod touch Installation
Pandora comes with a table top stand already attached to the unit.
1. To insert the iPod touch into the Pandora case, rotate the case
backward until the opening clears the edge of the stand (Figure 1–
4 on page 9).
Click here.

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Chapter 1 Installation
iPod touch Installation
Figure 1–4 Rotate the Case Backward
2. Gently slide the iPod touch into the case (Home button end first)
until you feel it engage the internal connector as shown in Figure
1–5.
Figure 1–5 Inserting the iPod touch into the
Pandora Case
Opening clears the
stand edge.
Note: Newer units will have a hole into which you can insert a set
screw to secure the iPod touch into the Pandora case. Insert
the set screw into the hole and tighten with the hex wrench
provided

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Chapter 1 Installation
iPod touch Installation
3. If you have not already done so, connect the Pandora power
supply to the Pandora case and to a power source.
4. Place the unit at approximately eye level and tilt the unit in the
stand as needed for optimum visibility.
5. Connect a digital audio input source to one or more of the inputs
on the rear panel.
IMPORTANT: For proper hardware operation, always apply power to the Pandora
before launching the Wohler Loudness application.
Note: For testing purposes, you can run Pandora in Demo mode
without attached audio sources.