AcoustX D2 User manual

D 2 Acoustical Measurement System
QuickStart Guide
Version 2.6
AcoustX
Middletown, CA
Tel: [phone]
www.acoustx.us

Welcome to the AcoustX D 2 Acoustical Measurement
System and win|RTA software. This guide will provide you with
an overview of setting up and connecting the hardware, and
installing and running the software.
page 2
N O T I C E
© Copyright 2020 AcoustX. All rights reserved.
This manual contains confidential and proprietary information
protected by copyright laws. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval
system, or translated into any language, in any form or by any
means, electronic, mechanical, photocopying, recording, or
otherwise, without the prior written permission of AcoustX.
The information furnished herein is believed to be accurate
and reliable. However, AcoustX assumes no responsibility for
its use, or for any infringements of patents or other rights of
third parties resulting from its use. AcoustX reserves the right
to modify at any time the product functionality and features
where appropriate, without notice.
Version 2.6
L i m i t e d W a r r a n t y
AcoustX warrants the D2 Acoustical Measurement System hardware
and its parts against defects in materials or workmanship for a period
of one (1) year from the original date of purchase. During period,
AcoustX will repair or replace a defective product or part without
charge to the customer. The customer is responsible for delivering
the defective component (or the entire D2 Acoustical Measurement
System, if requested) to AcoustX. The customer must pay for all
shipping and insurance charges transportation of the defective
component(s) to AcoustX for repair. AcoustX will assume responsibility
for shipping and insurance charges involved in returning the
component(s) to the customer.
The win|RTA software is distributed on an “as is” basis, without
warranty. AcoustX makes no representation or warranty, either
expressed or implied, with respect to the software programs, their
accuracy, quality, or fitness for a specific purpose. AcoustX shall have
no liability to the purchaser, or to any other person or entity with
respect to any liability, loss, or damage caused, or alleged to have
been caused either directly or indirectly by the software contained on
the distribution disk. This includes, but is not limited to, interruption
of service, loss of data, time, or profits, or consequential damages
resulting from the use of the software. If the distribution medium is
defective, you may return it for a replacement within the warranty
period.
Note on the software:
When you see a button with a bar on
the right side, this indicates that
when you click on it, a drop-down
menu will appear.

page 3
CONNECTION DIAGRAM
Equipment in Auditorium
Microphones
Equipment in Projection
Booth
Once installed, these
USB devices should
always be connected to
the same physical USB
port for proper
operation.
Use only USB ports that
are built in to the
computer, not external
hubs.
Line In
balanced
1/4"
phone
Line Out
balanced
1/4" phone
Input from
Plexer
5-pin female
mini-XLR
75'
interconnect
cable
Plexer
output
5-pin male
mini-XLR
Host computer
Each microphone must
be connected to its
assigned input by
matching the marker on
the connector to the
symbol on the Plexer.

page 4
Plexer Panel Diagrams
Front Panel View Top Panel View
On-Off Switch
Microphone selection indicator LEDs
Plexer output to Controller
(5-pin male mini-XLR)
Microphone Inputs 1-4
(3-pin female mini-XLR)
Controller Panel Diagrams
Top Panel Left Panel
Right Panel
Microphone selection LEDs
Status LED indicates an
error when lit (USB cable
must be re-inserted to
reset the Controller)
Input from Plexer
(5-pin female mini-XLR) Balanced line out to USBPre
Pin jack connectors for pink noise
relay switch closure. Used to
trigger cinema processor pink noise
USB port to connect to
host computer
Connect to same port on
computer each time

page 5
USBPre2 Panel Diagrams
Front Panel
Input (Left) Panel Output (Right) Panel
2, 3, 4, 5 - Not used by D2.
1 - Level control for Channel 1 is
preset to MINIUM or FULLY
COUNTERCLOCKWISE. Aluminum cap
prevents accidental movement of
input control. Channel 2 is also
calibrated when knob is set to
minimum gain.
12 - Output level
control - Set to
maximum
6 - Input selectors for
Channels 1 & 2. Line
Input must be
manually selected for
both channels using
these buttons.
7 & 10 - Level indicators
9, 11 -- headphone
control
2 - The D2 uses the Line 1 input by
default. Line 2 can be selected in
software. Both channels are active in X-Y
modes.
7 - USB connection to host
computer.
Connect to same port on
computer each time.
1 & 3 - Not used by the D2. 6 - Select S/PDIF in Input/
Output.
5 - Select
AUX in
Output.
4 -
Headphone
outputs.
8 - meter control
Back Panel 1 - Balanced outputs

Installation
1. Install the USBPre2 Digital Audio Interface
first. Please refer to the documentation
accompanying the USBPre2 for complete
installation and operating instructions. (Note:
The USBPre2 should be connected directly to a
USB input on the computer instead of through
an external USB hub.) When using WMME
drivers under Windows Vista, 7, & 8 you must
set the sampling rate to 48 kHz 16 bit for
Recording and Playback for the USBPre2 in the
Windows Control Panel. You may also use the
SoundDevices ASIO drivers available on their
website. When using ASIO, you do not need to
set the sampling rate.
2. Connect the D 2 Controller as shown in the
connection diagram. The Controller must be
connnected directly to a USB input on the
computer instead of through an external USB
hub. When the Controller is connected, the
computer should prompt for drivers for the
device. The necessary drivers are found iln the
distribution.
3. Double click on "mysetup". Follow the
instructions and prompts of the installation
procedure to install the win|RTA software onto
the host computer. A short-cut icon for win|RTA
can be placed on the desktop during the
installation procedure.
page 6
4. Connect the remaining components of the D 2
Acoustical Measurement System (D 2 Plexer
and microphones) as shown in the connection and
panel diagrams.
5. Install the 9V alkaline battery in the Plexer
opening the battery cover on the back panel. If
you want to use a rechargeable battery, a 9V
lithium-ion battery is recommended.
6. Double-click on the short-cut icon placed on the
desktop to start the win|RTA software. Note that
a default configuration (preferences) will be
created the first time the program is executed.
The user should customize this information as
appropriate in the Config panels.
7. After installation, enable microphone
calibration by selecting mic cal numbers in the
Config menu. (See the Config diagrams later in
this document.) The microphone serial numbers
are assigned with Mic 1 as the lowest serial
number through Mic 4 as the highest serial
number. The "Mic Cal" checkbox must be selected
to enable mic calibration.
8. With the USBPre2 connected, select the
"Interfaces" window in Config. Press "Select" and
choose USBPre2 from the list of available
interfaces.
9. Finally, click "Save Configuration" to store the
preferences to disk.

Main Screen
Print screen
Selects single
mic input mode
for mics 1-4
Clear screen
and reset to
default settings
Save the
current
measurement
(Shift-Click to
export as
text)
Exit win|
RTA
SPL/ Main
reading
window
Select file to
display as File
A (left bar
when A and B
selected)
Select file to
display as File B
(right bar when A
and B selected)
Filename
for File B
Set
analyzer
mode
Measurement
units
Open Config
window
Set length
of timed
average
Timed
average
countown
Reference line
Change
Reference
line
Turn on
analyzer Stop all
processes
Pink noise
ON/OFF
Vertical
scale
Screen
response
Vertical
resolution
Frequency
resolution
Display
offset
File view
mode
User definable function keys. Shift key
enables new row of keys. Click on F-key
number to display and set function choices.
Filter band
center
frequencies
SPECIAL KEYS AND FUNCTIONS
- ESC key kills all processes
- PgUp/PgDn or mouse wheel moves reference line
- Shift shows new row of function keys
- Shift-click on Save button to export as text (.TXT)
- Shift-click and drag mouse on display to zoom
view in RTA mode. Click to restore.
- Right-click displays edit menu when in
comment
- Hold cursor over filename field to see full
pathname
CTT MODE KEYS
- Up/Down arrow moves among menu selections
- Left/Right arrow moves in or out of current menu
- Alt-Left Arrow moves up one levele when in a data
entry field
- Shift-click on Home CTT Coverage test button to
rename
X-Y
- Shift-click-drag moves both channel gains together
page 7
Start
selected
test

Technician name
Organization
Name of theatre
Select data
directory
page 8
Selected data directory
Defaults to "My Documents"
Set CTT configuration for
type of room under test
Set default units
for measurements
Select audio
interface
Enable D2 Controller
Configuration: Profile and Interfaces
Write configuration data to disk
Normal is for displays 1024x768
or larger. Compact is for smaller
screens, 1024x600.
Save Configuration and restart
win|RTA to take effect.
Set items to show
on Mode menu
Set the interface type

page 9
Disable one or more
microphones
Enable and load microphone
calibration files.
Adjust the gain of
individual
microphones.
Configuration: Microphones
If the loaded mic cal files are
configured for EAI, a check will
appear in the EAI checkboxes. To
use EAI, either these boxes must
be checked, or one of the mic cal
files must be exported (SHIFT-click
Clear) and loaded into the external
software. For more information
on EAI, see http://acoustx.us/
eai.html.
Change the response type of the
microphone. For a discussion of this
topic, see the AcoustX website.
When exporting a mic cal file using Shift-click Clear
(Export), insert a comma after the frequency.

Display octave markers
Show bar values when cursor is moved over a bar
Enable
balloon help
Set length of User Average
Set display for Cat. No. 566 test film (film projectors)
Enable Variable X-Curve
The variable X-Curve can either change the slope
of the curve (according to SMPTE ST202) or the
frequency at whiich the slope begins (the knee).
page 10
Configuration: Display
Change the vertical postion of the X-Curve
Average data from previous measurements. This is
useful if you wish to use one microphone and get
results similar to using the mulitiplexer. Make
measurements at four different positions, load the
four files, and click Calculate. For best results, load
the data taken at reference position into File #1
and enable Gain Leveling.
Show EAI mic config warning message
Show Pass/Fail in CTT
Reverse the effect of the Reference Slider

page 11
Configure PINK Button behavior
Set units of measure and level for outputs
Enable outputs. In Analog mode,
the channels can be named.
Configuration: Input and Output
Select Input
Select input channel for line input
(Mic selection is on main screen)
Select 0 dBFS reference. There is a 3 dB
difference between settings.
Apply 22 Hz high pass filter to FLAT, Line In, S/PDIF
Enable & configure D2 Relay
Set output levels
Set Plex rate
Select test signal output port
(shown with optional AC3 encoder)

page 12
X-Y Oscilloscope
Mode Select
Set channel to
display on RTA
Set
measurement
units
Adjust X gain
Move X-Y
disiplay
horizontally
Adust Y gain Move X-Y display
vertically

page 13
Dual Trace Oscilloscope
Adjust Channel
1 vertical
position
Set
measurement
units
Mode select
Adjust trigger
level
Select channel
for triggering
Set vertical
gain
Set
measurement
units
Set vertical
gain
Adjust time base
Adjust Channel
2 vertical
position
Adjust refresh
rate