BASIS 922az User Manual
BASIS 914lz
4X16 CobraNet Enabled Control and Monitoring Signal Processor
Hardware Manual
TD-000200-00 rev.A
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to
the presence of uninsulated “dangerous” voltage within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to humans.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of
important operating and maintenance (servicing) instructions in this manual.
Electrical energy can perform many useful functions. This unit has been engineered and manufactured to
assure your personal safety. Improper use can result in potential electrical shock or fire hazards. In order
not to defeat the safeguards, observe the following instructions for its installation, use and servicing.
CAUTION: To reduce the risk of electric shock, do not remove the cover. No user-serviceable parts inside.
Refer servicing to qualified service personnel.
WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture.
1- Maximum operating ambient temperature is 50°C (122°F).
2- Never restrict airflow through the device fan or vents. Please insure that the air intake and exhaust
vents are unobstructed.
3- When installing equipment into rack, distribute the units evenly. Otherwise, hazardous conditions
could be created by an uneven weight distribution.
4- Connect the unit only to a properly rated supply circuit. The BASIS 914lz is suitable for connection to
100 - 240 VAC, 47 - 440 hertz, with no special considerations other than the appropriate IEC power cord.
5- Reliable Earthing (Grounding) of rack-mounted equipment should be maintained.
NOTE: This equipment has been tested and found to comply with the limits for a class B digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and if not installed and used in accordance to the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by switching the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio or TV technician for help.
© Copyright 2005 QSC Audio Products, Inc. QSC® is a registered trademark of QSC Audio Products, Inc. “QSC” and the QSC logo are registered
with the U.S. Patent and Trademark Office. All trademarks are the property of their respective owners.
Don’t want to read the entire manual? Just
want to dig right in? Go to page 18....
The BASIS 914lz provides the digital audio transport, signal
processing, control and status monitoring facilities needed
to bind a group of amplifiers and loudspeakers into an integrated functioning system. In conjunction with software, the BASIS 914lz enables the user to
design, test and deploy professional audio reinforcement
and distribution systems ranging in size from one to hundreds of channels.
Each QSC power amplifier connects directly to a BASIS
914lz via one of its four QSC DataPorts. All mission-critical
elements of the BASIS-driven sound system are monitored.
User-selected events are logged and loudspeaker protection
features unique to BASIS such as QSC's power limiter are
made possible through the DataPort functionality.
A standard Windows computer is the principle user-interface for controlling the overall BASIS/QSControl system.
However, the BASIS 914lz also offers a front panel interface
for accessing a few critical functions.
A single server computer can support several
clients running QSC's latest Venue Manager software. Thus,
the sound system can be operated via several computers,
roaming wireless laptops, tablets, etc., all at the same time,
1- Power indicator
2- Diagnostic indicator
3- Network status indicators
4- Port connection status indicators
5- Multi-function push buttons
6- Display
7- Rotary select/accept knob
8- Safe mode switch (recessed)
from anywhere a connection to the network
is available.
The network can also be managed from a single computer running both the client and the server. Once all
BASIS devices in a system are configured, a computer is no
longer required on that system’s network. All basic functions of the BASIS 914lz continue to operate with or without
a control computer connected to the network.
The configurable DSP engine provides all of the functions
necessary to handle the amp/loudspeaker portion of a signal chain, such as very flexible and precise crossovers,
delays, equalization, compression/limiting, etc.
Audio enters a BASIS 914lz either through analog XLR/TRS
combo inputs (line level) or from CobraNet source devices
such as QSC's line of RAVE digital audio routers. Any combination of 16 CobraNet channels (selected from up to 4 bundles of 32 channels) can be routed into the 24 x 24 DSP
engine. Any or all of the 24 DSP channels can also be routed
to up to 32 CobraNet channels on the network.
Unlike other configurable DSP boxes, the intrinsic processing latency of the BASIS 914lz is both short and fixed at
9- DataPorts
10- XLR/TRS combo inputs (line level)
11- Omni inputs
12- RS-232 port
13- Network status indicators
14- QSControl 10BaseT receptacle
15- CobraNet 100BaseT receptacle
16- IEC power inlet
See page 14 for detailed descriptions.
Introduction (continued)
0.396 milliseconds. When analog input and analog outputs
are used, the total delay is 2.354 milliseconds. The delay
does not change regardless of the DSP configuration, unless
the configuration intentionally adds more delay.
The BASIS 914lz also supports the new optional low-latency
CobraNet feature that provides transport at only 2.66 milliseconds delay. Thus the delay from analog to analog across
the network can be less than 6 milliseconds, fast enough
not only for large audio distribution but for the most critical
real-time live performance work.
Both software and firmware can be easily updated over the
network. In the future, QSC will be adding new capabilities
to both BASIS and Our latest code releases
and access to up-to-date information on BASIS and QSCon-
Block Diagram
4 are available at We invite you
to visit us there.
We've applied our many years of experience in supporting
high-end installed sound with our previous system-building
products such as RAVE, QSControl, CM16a, DSP-3, DSP-4,
and DSP-30. The BASIS 914lz brings all that technology
together in one compact, powerful, easy to use system. We
are confident that your new BASIS 914lz will provide years
of dependable service and we hope it will help you, the system designer and implementer, to express your creative
audio system ideas.
Introduction - Networking the BASIS 914lz
The BASIS 914lz has two RJ-45 network connection ports on the rear panel. One port is labeled "QSControl" and supports standard
10BASE-T Ethernet. The other port is labeled "CobraNet" and supports 100BASE-TX, also known as "Fast Ethernet". In the following
sections we describe the use of these ports and show example network connection schemes.
The BASIS 914lz supports two distinct kinds of network activity; the first is audio transport via CobraNet, and the second is control and
monitoring via The user can choose to install one network for CobraNet traffic and a second separate network for traffic. We call this the "Two Wire Interface". Alternately, it is possible to run both control and audio traffic over CobraNet via the CobraNet port. In this case the QSControl port is unused. We call this the "Single Wire Interface".
Under the most demanding real-time control conditions and when using the lowest latency CobraNet settings, users may experience
better performance using separate networks, especially when displaying a great many real-time meters. For most applications, separate networks won't provide any discernible benefits and will cost more. We therefore recommend using the Single Wire
Interface when running CobraNet.
If your application uses only analog I/O without CobraNet, then you should use the QSControl port for traffic and ignore
the CobraNet port.
Why CobraNet Needs Special Treatment:
Ordinary Ethernet traffic has no guaranteed time of delivery. Packets of information may arrive at their destination out of order and
some may be delayed more than others. This is fine for E-mail and even for downloading MP3 files over the Internet. Everything ends up
properly reassembled at the destination, but how long this takes will vary according to network loading, span, etc. In contrast, CobraNet is "real time" - it delivers audio with a minimal, consistent transmission delay. CobraNet is designed to use as much of conventional
networking technology as possible while providing both guaranteed time of delivery and isochronicity - maintaining a phase-locked
sample-accurate clock across the entire network. These requirements mean that ordinary unregulated Ethernet data cannot be freely
mixed with CobraNet information. The two can coexist on the same wire, but only by adhering to the proper rules.
To learn more about CobraNet and appropriate network topologies, please visit
resources.htm and
Notes on Network Systems Design:
As with any communications system, the reliability and performance of a local area network is intimately related to the designer's skill
and knowledge in implementing a topology that is robust, efficient and standards-compliant. Proper network design is even more critical in distributed multimedia systems. Therefore, it is important for the system designer to realize that some conventional network
practices must be avoided. Although each network design is unique and may carry its own performance requirements, compliance to
the following three points will assist in building an audio network that is trouble free and efficient.
First, audio and conventional data communications deliveries should not exist on the same LAN or VLAN. The exception to this is the
BASIS 914lz Single Wire Interface, which offers a solution for converging audio and onto the same LAN or VLAN. However, conventional communications, such as corporate networks, print services, e-mail and Internet access, should not exist alongside
CobraNet audio and on the same LAN or VLAN. Further, CobraNet audio and data should not exist
together on the same LAN or VLAN when implementing the Two Wire Interface. This is not to say that conventional communications
cannot share the same network hardware with a BASIS 914lz. In fact, common network hardware, such as managed Ethernet switches
and media converters, can service both BASIS 914lz products and conventional data communications equipment so long as the managed switch or media converter are partitioned into separate network domains. This is normally done by configuring a separate VLAN
for each data type. (Some switches may allow individual port assignments or support partitions through DIP switch selection.)
Second, CobraNet audio must traverse either a repeater domain or a network switch domain. The point here is that the CobraNet port
on a BASIS 914lz must connect directly to, and only to, either a repeater LAN or a switched Ethernet LAN. Hybrid networks containing
both repeaters and switches are not permitted on the audio segment. Connecting the CobraNet port to a repeater that is in turn connected to a network switch poses an illegal and non-compliant condition. We recommend always connecting the QSControl and/or
CobraNet port(s) directly to network switch ports.
Third, the BASIS 914lz and system are targeted at network switch deployments. The consumer costs of Ethernet
switches have continued to fall over the last several years and are now comparable with repeaters on a per port basis. In addition, the
sophistication and scalability of network switches make them ideal for new installations. However, we do realize that designers may
wish to add BASIS products to existing audio network installations that are built on repeater LAN topologies. This applies primarily to
existing CM16a and RAVE networks. For this very reason we continue to support connectivity to network repeater hardware with the
BASIS 914lz. Support for network repeaters exists only with the Two Wire Interface and only with the standard CobraNet forwarding
latency. That is to say that the QSControl port and the CobraNet port must be connected to separate repeater LANs. Even when properly
configured, audio channel capacity is severely limited and both audio and control network expansion is limited by the respective capacity of each segment. In other words, scalability ceases to exist when bandwidth demands on the segment approach 10
Mbps and demand on the CobraNet segment approaches 100 Mbps. Obviously, we recommend taking advantage of switch network
technology whenever possible.
It should be noted here that while the CobraNet port on a BASIS 914lz is restricted to repeater LAN or switch LAN deployments, is a TCP/IP standards-compliant network system and therefore supports operation on network repeaters, switches and
routers. When implementing the Two Wire Interface, the segment does not require a single topology data path and
therefore repeaters, switches and routers may be assembled on the LAN in a hybrid fashion.
To learn more about network design rules and system compliance visit the QSC network resources page at
products/network/resources.htm. To learn more about CobraNet design requirements and to obtain the CobraCAD system design utility
visit the Peak Audio website at
All of this may seem daunting if you are new to networking. However, it all boils down to connecting a few simple cables between various networking devices. Most of the time it "just works". QSC helped pioneer CobraNet with our RAVE ™ products and there are hundreds of installations all over the world, in theme parks, hotels, stadiums - everywhere. They run hum-free, sound great and are very
The following examples will help get you started, but they just scratch the surface of what can be achieved with advanced networking…
Example #1 - X-over mode:
This is the simplest connection you can make between the BASIS 914lz and your computer. Use a CAT-5 crossover cable connected
between the BASIS QSControl port and your computer's Network Interface Card, (NIC). No network switch is required. With server and client software installed and running on your computer you will be able to completely set up and monitor your BASIS
Example #2 - CobraNet X-over mode:
This is the simplest connection you can make between two BASIS boxes. Use a CAT-5 crossover cable connected between the CobraNet ports of each unit. No network switch is required. This connection allows audio to pass between the two BASIS boxes over CobraNet.
Combining example 1 and 2 lets you setup and monitor one box at a time, much as you would have to do using a point-to-point RS232
connection, while passing audio between them, all without a network switch. However, you would have to physically connect your
computer first to one BASIS box and then to the other. With this elementary connection you don't have a true network. It is just like
making RS-232 connections - except that performance is much better.
All the other examples are of proper networks and all require a network switch. On a proper network, you have direct access to all
BASIS products all of the time without having to physically switch between them. You still get the great performance of TCP/IP over
Ethernet. (And we believe QSC's advanced 4th generation networking software provides the best performance of any networked
audio control system available today including Ethernet based systems from competitors.)
Example #3 - Single Wire Interface:
Here all and CobraNet traffic shares the same single CAT-5 cable between the BASIS 914lz and an unmanaged Ethernet
switch. The system manages traffic flow efficiently and reliably so that all audio and control data is delivered to its
appropriate destination anywhere on the network. Though the example shows only two BASIS 914lz units, as many devices may be
connected as there are available switch ports. All BASIS units will be able to communicate simultaneously with the computer. All will
have CobraNet audio. Switches can be connected to other switches to build larger networks; all of the normal networking principles
apply. (Note: there must be at least two CobraNet devices online for any data - audio or control - to come out of the CobraNet port.)
Example #4 - Two-Wire Interface (shared network hardware):
This example illustrates the Two-Wire Interface with a managed Ethernet switch. The switch is configured with multiple virtual
local area networks (VLANs). Ethernet deliveries can only reach destination ports belonging to the same VLAN from which it was
sourced. The figure shows a separate VLAN for traffic and a separate VLAN for CobraNet audio traffic. This configuration essentially provides a dedicated network for BASIS 914lz control and monitoring (including the system controller) and a
second dedicated network for CobraNet audio. As with the previous example, as many BASIS 914lz units may be connected as
there are switch ports available. All BASIS units will be able to communicate with the computer. All will have CobraNet audio.
Switches can be connected to other switches to build larger networks; all of the normal networking principles apply.
Example #5 - Two-Wire Interface (separate network hardware):
Example #5 is conceptually similar to example #4. The difference here is that separate networks are created by providing each local
area network (LAN) with its own network switch. Therefore, traffic segmentation is physical rather than logical. Example #5 also provides an additional level of fault tolerance, although at the expense of additional network hardware. The figure shows a separate network switch for traffic and a separate network switch for CobraNet audio traffic. All of the previous comments regarding
network expansion still apply.
There are no special unpacking precautions. However, it is recommended you keep the original packing material for reuse in the rare
event that service be required. If service is required and the original packing material is not available, ensure that the unit is adequately
protected for shipment (strong box of appropriate size, sufficient packing material to prevent load-shifting or impact damage) or call
QSC’s Technical Services Department for packing material and a carton.
What is included in the carton:
BASIS 914lz
Self-adhesive rubber feet
Hardware Manual (this document)
4 Software CD
IEC Power Cord 3 x #18 AWG
3-pin terminal block connector
2-pin terminal block connector
The BASIS 914lz can be used in or out of an equipment rack. Rack mounting is optional. Adhesive rubber feet are included for non-rack
mount installations. Use them to prevent the unit from scratching or marring support surfaces.
Rack Mounting
Rack mount the BASIS 914lz by supporting it from underneath while aligning the mounting holes with the threaded screw holes in the
rails; install all four mounting screws and washers and tighten securely. Ensure use of all four mounting screws in order to minimize the
chance of bending or distorting the rack mount ears. If the BASIS 914lz is to be transported while in a rack, we recommend supporting
the rear of the chassis. This will help prevent the unit from being damaged from the increased mechanical stresses of portable and
mobile use. The BASIS 914lz’s chassis includes integral rear mounting tabs for securing to the rack mounting ears.
Be certain not to block the cooling air ventilation openings on
the sides of the chassis.
Be certain not to block
the cooling air ventilation openings on the
sides of the chassis.
Computer Requirements & Software Installation
Installing is easy. All you need to do is choose the folder where the program is to be stored (the default setting is acceptable for most applications). We recommend your system meet the following minimum requirements:
1- IBM PC compatible computer with a Pentium 4 processor.
2- Processor speed of 1 GHz (2 GHz or faster recommended for systems with 30 or more BASIS/RAVE/DSP units).
3- 512 megabytes of RAM (1 gigabyte recommended for systems with 30 or more BASIS/RAVE/DSP units).
4- Hard drive with at least 500 MB of free space for the program and files you generate.
5- Display resolution of 1024 X 768, 16-bit color.
6- CD-ROM drive to install the software.
7- 10BaseT/100BaseTx network interface card
8- Windows XP Professional, XP Home, Windows 2000 SP2 (or better), or Windows NT4.0 SP6a operating system. Windows 95,
98 and ME platforms are not supported.
Note: If system is used for real-time adjustments and configuration of audio systems, we recommend all Windows Power Options
(located in the Windows Control Panel) features be disabled. Display, hard drive, system standby and hibernation settings should be set
to “Never”. This avoids waiting for the system to “wake-up” if adjustment is needed after an elapsed period of time.
To Install
1- Start your computer and start Windows.
2- If there are any programs running, please close them now. Be sure to leave Windows running.
3- Place the CD-ROM in your CD-ROM drive. You can also select Start-Run and browse for the file named setup.exe
from the CD.
4- Click the Install button.
5- Follow the installation instructions on the screen.
To Uninstall
1- Click the Start menu button and choose Settings/Control Panel.
2- Double-click the Add/Remove Program icon.
3- Select from the list, then click Add/Remove.
4- Click Yes to confirm you would like to uninstall
General Information & Configuration Memories
Amplifier Setup
The QSC DataPort-equipped amplifiers connected to the BASIS 914lz must have their power switches in the “on” position. For initial
testing, use the lowest useful gain setting until the system is operating as expected. After the system setup has been verified and
tested, gain settings may be adjusted as required.
The network should be operable and software should be installed/running on the system controller computer.
CobraNet Connection Loss
If you are operating with a valid CobraNet network, and the connection to the network is disrupted, audio will momentarily mute, allowing the BASIS 914lz to synchronize with its internal clock. If CobraNet network connection is re-established, the audio will mute again
while the BASIS 914lz synchronizes with CobraNet.
Configuration Memories
The BASIS 914lz has non-volatile storage locations that contain settings for the device as well as DSP signal flow. The storage locations make it possible to set up the BASIS for different situations and quickly recall the setup with or without software
using the front panel controls.
AC Power Cord
Insert the molded receptacle of the AC power cord into
the AC power inlet on the back of the BASIS 914lz. Plug
the AC line connector into the AC outlet. The power
supply will accept from 100 to 240 Volts AC, 47 to 440
Hertz, without any changes. If a different type of IEC
power cord is required than supplied with your 914lz,
contact QSC’s Technical Services Department.
CobraNet and QSControl
connection. Accepts ruggedized or normal shell-less
RJ45 plugs.
Connect one end of a category-5 cable terminated with
a RJ45 plug into the CobraNet receptacle. Insert the
RJ45 plug into the receptacle with the lock-tab oriented
toward the bottom of the BASIS 914lz and push firmly
until the connector locks into place (usually an audible
“click” can be heard). Connect the other end to the
appropriate CobraNet network port.
Analog audio input- balanced connection.
Connect one end of a category-5 cable terminated with
an RJ45 plug into the QSControl receptacle. Insert the
RJ45 plug into the receptacle with the lock-tab oriented
toward the bottom of the BASIS 914lz and push firmly
until the connector locks into place (usually an audible
“click” can be heard). Connect the other end to the
appropriate network port.
Analog Audio Inputs
Four balanced combo (XLR/TRS) inputs are provided, CH
1 INPUT - CH 4 INPUT. They accept line level signals.
Plug the input signal XLR or 1/4” TRS connectors into
the input receptacles. Connection pin-out is printed on
the rear label for reference. Refer to the illustrations for
balanced and unbalanced connections. Use balanced
audio inputs whenever possible.
Analog audio input- unbalanced connection. Note
jumper wire between - and
Omni In
The two Omni In connectors are two-pin terminal block
connectors. They accept contact closure, TTL logic signals, 0-5 VDC control voltages, or 10k ohm variable
resistors. The contact closure and logic devices accommodate on/off or state-change events; the variable
resistor input provides full 8-bit resolution allowing for
incremental-change events. Refer to the illustrations for
connection recommendations. NOTE! +48 volts is the
absolute maximum that can be applied to the + pin
without damage. Voltage is with respect to chassis or
the - pin.
Omni In connections. Variable input must be 10k ohm
variable resistor. Contact closure input can be a switch or
relay contacts. These inputs
can operate software
“devices”. Negative (-) terminal is at chassis potential.
The RS-232 is an optional utility serial port for accessing advanced features. Connect to an
available COM port on your PC and communicate using a terminal control program such as
Windows Hyperterminal.
Use a normal serial data cable with a DB-9 male plug to connect to the BASIS 914lz. To connect the cable, orient the connector properly, then push into the receptacle until it is firmly
seated; tighten the retaining screws “finger tight”. Communications should be 9600 baud,
no parity, 8 data bits, 1 stop bit, and flow control Xon/Xoff.
PORT A through PORT H are QSC DataPorts. When using the
BASIS 914lz with QSC DataPort-equipped amplifiers or QSC
DSP products (DSP-3, DSP-4) connect to the BASIS 914lz using
QSC DataPort cables. The 914lz supports up to sixteen channels
of DataPort audio and amplifier status monitoring. This can be
eight 2-channel amplifiers or two 8-channel amplifier or other
suitable combinations. If connecting a multi-DataPort amplifier,
be sure to connect the DataPorts sequentially (i.e. Amp DataPort 1 to BASIS DataPort A,
Amp DataPort 2 to BASIS DataPort B, and so on). This practice assures proper amplifier
reporting in
To connect the cable, orient the connector properly, then push into the receptacle until it is
firmly seated; tighten the retaining screws “finger tight”.
LED Indicators
When the BASIS 914lz is plugged into a properly functioning AC outlet, it will power up and
briefly display a welcome screen on the LCD display.
POWER Indicator- This blue indicator illuminates when the BASIS 914lz is plugged into a
properly functioning AC source. There is no power switch on the BASIS 914lz. This helps to
prevent accidental system shutdowns.
DIAGNOSTIC Indicator- This red diagnostic LED reports several possible operational conditions. During boot-up, it is used to continually blink a “dot-dash” pattern if the power-on
memory self-test fails. During normal operation, if any non-recoverable system fault occurs,
the diagnostic indicator will remain on, requiring a power restart. If this condition persists,
contact QSC’s Technical Services for assistance.
The diagnostic LED is also used to indicate an update is in progress during a remote firmware update cycle. First, the LED will blink slowly, indicating the memory erase cycle, then it
will blink rapidly, indicating the memory write cycle. NOTE! During a firmware update, it
is critical the unit remain powered on for the entire process in order to complete
The diagnostic LED may also be controlled by using the software. This feature is particularly helpful for identifying a particular unit.
(continued, next page)
LED Indicators (continued)
QSControl and CobraNet Network Status (Port) Indicators- There are two groups of three LEDs on the front and rear
panels labeled RX, TX and LINK. One group is for the network port and the other for the CobraNet network port.
Their functions are described below. Note: Port indicators on rear panel are color coded to match the corresponding color-ring
around the QSControl and CobraNet RJ45s.
RX (receive)- This indicator illuminates any time the BASIS 914lz receives data from the corresponding network.
TX (transmit)- This indicator illuminates whenever the BASIS 914lz transmits data onto the corresponding network.
LINK STATUS- The corresponding indicator illuminates when the BASIS 914lz is connected to an operating network.
PORTS indicators- These indicators are labeled A through H. These indicators are either off, red, green, or yellow, depending on what is connected to the port. The indications are:
off- nothing attached
red- QSC DSP accessory attached
green- QSC DataPort amplifier attached
yellow- QSC DSP accessory and Amplifier combination attached
LCD Display and Controls
The BASIS 914lz has a 2 line X 16 character LCD display. The display and the multi-function push-button switches on either
side provide data access and editing capability. The push-button switches on either side of the display are used to navigate
through the menus. The rotary select/accept knob is active for many displayed items allowing you to scroll through choices by
rotating the control, and accepting choices (entering) by pushing in on the control.
The accessible menus and sub menus may appear differently than example shown. Software updates may occasionally
improve the interface. Below is a the basic navigation flow for the BASIS 914lz menu system.
Front Panel Password Lockout
The password lockout provides the ability to restrict access to all of the editable parameters available on the LCD front panel.
This feature is enabled or disabled via software only (refer to the “General Tab” area and click on the “Front
Panel Password” button). when the lockout feature is enabled, all front panel LCD functions are readable, but editing of
parameters is now password protected. While in this mode, any attempt to edit a parameter will require the user to enter the
Front Panel Password. The default factory password is “qsc”. The password is stored in the BASIS unit and can be changed
using the software.
Once the password has been correctly entered, the BASIS will allow edits to the parameters.
After 5 minutes of inactivity, the BASIS will automatically reset the Front Panel Password lockout.Re-entry of the password
will be required to resume editing.
The lockout mode can be deliberately disabled via the “Disable Edits” screen in the Front Panel Password menu of the software.
LCD Navigation Map
Left side buttons have screen dependent functions.
This read-only screen is the “out of the box” default
display after power up. This is the most desired information when first setting up a network system. Once
user moves to a different screen, the last screen
accessed becomes the new power up default.
Use rotary data wheel to edit data. Rotate to
move cursor and push to accept change.
Boot Screen
Right side buttons serve as up/down
Arrow characters indicate right side
button context. If additional menus
are available, the arrow character
will be shown.
*Note: After successful password entry,
all screens with editable parameters will
have read write capability. Without password entry, these screens will be readonly.
Getting Started
This section outlines one of the simpler methods of getting familiar with your BASIS and the software. The goal of this
procedure is to get your computer and the BASIS connected and communicating and the software installed and running.
After the software is installed and running, refer to the software’s Help file for all software related operation/issues. Note! The default
password for the BASIS is “qsc” (no quotes, lower case).
1- Turn off the computer and unplug the power cord from the BASIS 914lz.
2- Connect a CAT-5 crossover cable from the computer’s network interface card (NIC) to the BASIS QSControl jack (example 1, page 6).
3- Reconnect the power cord to the BASIS 914lz (turn it on). Using the BASIS LCD display and controls, navigate the menu to the IP
Address and make a note of it. In steps 12 and on, you will need to change the IP address of the BASIS or your PC.
4- Turn on the PC and start Windows. You must have Administrator rights and be signed on as Administrator in order to install the program. Ensure you are signed on to the computer as the Administrator.
5- Place the CD-ROM in your CD-ROM drive. The install wizard should start. If not, you can also select Start, then Run
and browse for the file named setup.exe from the CD.
6- The installer queries the computer for available drive space and other information. If required MDAC library (Microsoft) files are not
already on the computer, the library files are installed. You must accept the Microsoft software agreement in order to install the MDAC
library. It may be necessary to reboot the computer after library installation.
7- At the prompt for “Client/Server” selection, keep both Client and Server selected. This will be appropriate for general use.
8- When prompted “Select Installation Folder”, specify the installation directory or accept the default location.
9- You will be prompted to select an installation accessible by everyone (non-secure) or an installation accessible only to you (secure).
Select the appropriate Everyone or Just Me box and continue. Installation proceeds.
10- Reboot only if your computer prompts you to do so.
11- Select Network Connections in the control panel. Select Properties. Right-click Local Area Connection, and view its properties. Highlight the Internet Protocol (TCP/IP) tab and view its properties. You will see an entry field for the IP address. Decide
whether you want to change the IP address of your computer to be similar that of to the BASIS (easiest if you have many BASIS units)
or if you want to change the IP address of your BASIS to be similar to that of the computer. This is a network management decision.
12- Change the IP address of the BASIS (or computer) to be compatible with that of the computer (or BASIS). Typically, this is done by
making the IP address of one of the devices 1 digit different in the last octet (group of digits in IP address). If changing the computer’s
settings, write down the current values, in case you want to revert later.
13- The subnet mask address should be exactly the same for both the computer and the BASIS. The Gateway address should not be
altered as it is not used.
14- After you are satisfied with all your settings, close all open windows and start the program. Select Start, All Programs,, Venue Manager.
15- The login screen should open. The default password is “qsc” (lower case, no quotation marks). Select “Log on to Local Computer”
and click OK.
16-The Venue Manager window will open. A Startup Tips screen will be visible the first time Venue Manager is
launched. Optionally, the Startup Tips screen may be disabled by un-checking the box in it’s lower left corner. It is highly recommended the user become familiar with each of the tips listed on this screen. After reviewing the tip(s), close the Startup Tips screen.
Getting Started (continued)
17- Select Device, Add Device, from the menu. A new window will open prompting you to name the device. Name it logically, such
as BASIS 1, or similar. Select the Device Type and select BASIS 914lz. At the Password prompt, enter “qsc” (lower case, no quotation
marks). This is the device password, separate from the software password. The default, in both cases, is “qsc”, but you are free to
change either or both. Enter the IP address of the BASIS and click OK.
18- The BASIS will now appear in the inventory root (left side of screen, first with a red “x”, then a yellow exclamation point, then a
normal icon). If the BASIS does not eventually show in the inventory root, check that a crossover cable is used (only for BASIS connected directly to PC), check the cable connections, verify IP addresses are set correctly, verify Subnet masks are set correctly, and verify AC power is properly applied to the BASIS.
19- Click on the “+” sign of the BASIS 914lz in the inventory root, then the “+” sign of the Flashed Configs. Click on the config with the
loudspeaker icon. A view of applicable device tabs will open. Click the DSP block and the current DSP configuration of the BASIS will
be displayed. Default DSP routing is Analog Inputs 1-8 are routed to DataPorts 1-4, with each DataPort assigned 2 sequential channels
(i.e. Analog Inputs 1 and 2 are routed to DataPort A, Inputs 3 and 4 are routed to DataPort B, etc....).
20- Right click on the Design Editor icon in the lower left of your display; select “New”. A new window opens; select BASIS 914lz for
the device type.
21- Click on Help to access the software’s Help system. All software operation is covered in the on-line help file.
Operation of the BASIS 914lz is accomplished with the included software. No software operation is covered in this hardware manual. After installing your software, open the Help file
and follow its recommendations. The software Help file includes the most recent information available for your BASIS 914lz.
QSControl Port
The QSControl port operates on a 10BaseT Ethernet network. This port is one of the primary means for connecting to the
BASIS. The port may connect directly to a PC's 10BaseT or 10/100 (auto-sensing or auto-negotiating) network interface card using a
crossover cable. Data from the QSControl port may also pass through network repeaters, network switches and routers. We strongly
recommend the use of network switches to facilitate higher bandwidth and dedicated connections.
CobraNet Port
The CobraNet port operates on a dedicated 100BaseTx (Fast Ethernet) network. The CobraNet port may connect directly to a PC's
100BaseTx or 10/100 (auto-sensing or auto-negotiating) network interface card using a crossover cable for the purposes of configuration when the BASIS 914lz is in the single-wire interface mode. During normal operation (passing audio) the CobraNet port must connect to a 100BaseTx or 10/100 or 10/100/1000 (auto-sensing or auto-negotiating) switch port. Optionally, the BASIS 914lz may connect
to another CobraNet port using a crossover cable. When the BASIS 914lz is operating in the two-wire interface mode (described in following sections), the CobraNet port may be connected to a network repeater. Regardless of the interface mode, all CobraNet audio data
must pass through only network switches or only network repeaters. Combinations of these devices will cause unreliable operation and
are not supported. Likewise, the use of routers, gateways and ATM devices are not supported for the CobraNet audio path.
CobraNet Channel Density
The BASIS 914lz will support the acquisition of up to 32 channels via up to 4 inbound bundles (from the network). Of these 32 channels,
any 16 may be selected to forward to the signal processing chain (DSP engine).
The BASIS 914lz will support the delivery of up to 32 channels via up to 4 outbound bundles (to the network). Of these 32 channels, up
to 24 may be unique (processed individually... or the result of mixed signals from the DSP engine). The remaining 8 channels (if used)
will be copies of other channels.
CobraNet Channel Resolution
All CobraNet audio will be processed internally within BASIS 914lz at 24-bit resolution. The BASIS 914lz may receive any valid resolution off of the network. This is currently 16-bit, 20-bit and 24-bit. Audio via inbound bundles may be in any combination of these resolutions and the BASIS will process the data accordingly. All DACs will process 24-bit audio, though the least significant bits may be zero
filled if the inbound audio format is less than 24-bit resolution.
The BASIS 914lz will support outbound (sourced onto the network) resolutions of 16-bit, 20-bit and 24-bit. The default outbound resolution is 20-bit.
CobraNet Terms and Conditions
Single-wire interface offers the best efficiency and ease of network configuration for most applications. The single-wire interface
requires fewer network ports and less cabling. Single-wire interface refers to CobraNet audio, CobraNet control and monitoring and control and monitoring using the same network connection. This mode uses the CobraNet connection to provide all data
communications to the BASIS product. In this mode, the port must connect to a 100BaseTx or 10/100 or 10/100/1000 (auto-sensing or
auto-negotiating) link partner. Network repeaters will not be supported and all audio must pass through network switches only. A Venue Manager PC may connect to the network via a repeater or router.
Two-wire or dual-wire interface offers the greatest versatility in network design. Separate connections allow discrete networks
and offer support for WAN topologies on the Two-wire or dual-wire interface refers to CobraNet audio having a
dedicated network link and control and monitoring having a dedicated network link. In this mode, the two ports (CobraNet and must be connected to separate networks. By separate networks, we mean either physically separate hardware
or the use of common hardware with partitioned or segmented network domains such as the use of VLANs. The dual-wire interface
may support dissimilar network hardware for the two port connections (see rules above for CobraNet and QSControl port connections).
1 Minute Autosave Timer and Power Cycling
The active configuration has a special feature associated with it. Any changes made to a parameter during operation will start an internal timer which will trigger an automatic save of the configuration data. The save procedure begins after 1 minute of parameter change
inactivity. If the BASIS 914lz is then power cycled, upon restart, the previous settings data will be preserved in the active configuration.
Utility/Diagnostic Functions
Safe Mode Switch
Location of Safe Mode switch: The front panel has a small access hole on the left side, just left of the Power indicator. It is not
labeled to help prevent accidental use. The Safe Mode switch can be operated by using a paper-clip (or similar item) inserted into
the access hole and pushing.
Safe Mode: Use if the BASIS 914lz becomes inoperable (or behaves in completely unexpected ways) after updating
If the BASIS 914lz operates in an unexpected way or is not responding to any communications after a new firmware file is
uploaded to it, it is likely the file was corrupted during transfer. If this occurs, there is a “backup” program in the BASIS 914lz that
will enable you to communicate with it.
How to put the BASIS 914lz into Safe Mode:
1- Turn off the power to the BASIS 914lz by unplugging it from the AC outlet.
2- Depress the safe mode switch and keep it depressed while plugging the unit back in (power on).
3- The BASIS 914lz is now in “safe mode”. You may release the switch.
You should now be able to re-establish limited TCP/IP communications with the BASIS 914lz. Once communication has been reestablished, the file transfer can be tried again or the old application file used until the source of the data transfer problem can be
found. Also, WILL NOT communicate with the BASIS 914lz if it is in “safe mode”. You may communicate only using
TFTP, Telnet, or RS-232.
RS-232 Serial Port I/O Interface
The RS-232 connector on the rear panel is used as a serial port input/output (I/O). This I/O port is used for accessing Ethernet/IP
settings, stand alone control capabilities, system “health” data, firmware version information and other related data.
Should any system problems arise, the data that may be accessed through this interface can help to track down the problem. The
most common items that might be used are “Display Network Settings” and “Enter Network Setup”. Many of the remaining selections would typically be used for troubleshooting purposes along with a QSC technical representative prompting you to access particular menu items so the data can be interpreted.
Connection is made using a normal serial cable between your computer’s serial port and the RS-232 port of the BASIS 914lz. Once
properly connected, a “dumb-terminal” program (such as Hyper Terminal, a widely used version on most Windows-based PC’s) is
started and communication established between the PC and the BASIS 914lz.
Following is the basic procedure for starting up Hyper Terminal, naming the connection, specifying the communications settings
and an example of “what you should see” for a text-menu once the communications link has been established. If programs other
than Hyper Terminal are used, you will need to follow your software’s instructions for establishing communications through your
PC’s COM (serial) port.
Utility/Diagnostic Functions (continued)
RS-232 Communications Procedure:
1) Connect the RS-232 port of the BASIS 914lz to an unused serial port (COM port) of a PC using a normal (straight-through) serial
2) Open the HyperTerminal program. This program is usually started by clicking the Windows START icon, highlighting PROGRAMS,
then ACCESSORIES, COMMUNICATIONS, and finally, highlighting the Hyper Terminal folder and clicking on its icon.
3) After starting Hyper Terminal, a Connection Description window will pop-up. It will require that you name your connection. Enter a
name for your new connection (example: BASIS 914lz) and click OK to continue.
4) Next, Hyper Terminal needs to know how to “talk” to the BASIS 914lz. This selection depends on which port on your PC the cable is
connected to. Ignore the first three entry fields (phone number information) and go directly to the “Connect using:” entry field and click
on the down arrow for the drop-down menu selection. Select the port the BASIS 914lz is connected to and click OK to continue. The
Properties window should appear next.
5) The Properties window for the selected COM port should now be active.
For the Port Settings, use the following information so communication between the BASIS 914lz and the computer is in the same
Bits per Second: 9600
Data Bits:
Stop Bits:
Flow Control:
Once you have set the properties as outlined, click OK to continue.
If all the connections and communications settings are correct, the main Hyper Terminal window will open.
6) The Hyper Terminal main window will appear next, but blank. Type the letter “h” (for help) and then the “Enter” key. This will prompt
the BASIS 914lz to post its menu text. The “h” key is the Help prompt for the BASIS 914lz. A text menu will appear. This is sent by the
BASIS 914lz and will detail your options and instructions for changing the address information.
From this main-menu you will need to make your menu choices and follow the instructions in the following sub-menus or screens.
Although many of the instructions and tests may not pertain to a specific setup or troubleshooting situation, you may be asked to run
certain tests by a QSC technical representative. The results of these tests will help to troubleshoot any problems.
The most common user item that might require settings to be changed would be the IP address information. This would be useful if the
IP address was inadvertently changed to an unrecognized address and subsequently you were unable to “talk” to the BASIS 914lz over
the network. This situation would require the “Display Network Settings” and “Enter Network Setup” items to be accessed for reassigning a valid IP address.
Utility/Diagnostic Functions (continued)
Telnet Access
The RS-232 features can also be accessed via Telnet. The Microsoft Telnet application is a Windows program. Consult Windows
documentation for Telnet information.
Basic procedure for opening a Telnet session:
1- To open the Telnet session- Click START, select RUN, type “Telnet” followed by a space, then the IP address of the BASIS 914lz
you want to communicate with in the text box and click OK.
2- If the address entered was correct and network communications with the BASIS 914lz are successful, the Telnet session should
3- Now you have the same options that are available in the Serial Port I/O (RS-232) interface section.
Preliminary Specification
Dynamic Range (AES-17, -60dB Method, all sensitivities)
A weighted
Distortion (20Hz-20 KHz, all sensitivities)
+4dBu (max.)
2dB below clip (max.)
<0.009% THD+N
<0.009% THD+N
<0.009% THD+N
<0.009% THD+N
<0.009% THD+N
<0.009% THD+N
Crosstalk (20Hz - 20KHz)
inter-channel (max)
inter-channel (typ)
intra-channel (max)
intra-channel (typ)
Frequency Response
20Hz - 20KHz (max)
20Hz - 20KHz (typ)
+/- 0.5dB
+/- 0.2dB
Program Inputs
Connector Type
Input Impedance (nom.)
Common-Mode Rejection
Input Sensitivities (variable)
XLR/TRS combo
Electrically balanced
Shell and shield terminals connected to chassis
1/Tip:+ 2/Ring:- 3/Sleeve: shield
Balanced: 10K ohms
Unbalanced: 10K ohms
20Hz - 20KHz (min)=: >54dB, 20Hz - 20KHz (typ): >60dB
Vrms: 1.5, 3, 9, 18 / dBu: 5.7, 11.8, 21.3, 27.3 / dBV: 3.5, 9.5, 19.1, 25.1
Program Outputs
Connector Type
Cable Type
Available “stock” Lengths
Maximum Qualified Length
8 HD-15 dataport connections
QSC DataPort cable, QSC p-n DPC-x (“x” designates cable length in feet)
1, 2, 3, 4, 5, 6, 10, and 20 ft., custom lengths available.
328 ft. (100 m) QSC DataPort cable only. Non-QSC cable, 6 ft (2 m) max.
Audio Converters
24 bit, 48KHz, in and out
infinite attenuation
Standard CobraNet Latency
BASIS to Network
Analog input through full DSP chain to CobraNet output 7.104 milliseconds
Network to BASIS
CobraNet input through full DSP chain to analog output 6.313 milliseconds
Analog input through full DSP chain, over CobraNet network,
through full DSP chain, to analog outputs
8.083 milliseconds
BASIS in stand-alone mode
Analog input through full DSP chain to analog outputs
2.354 milliseconds (Default Group Delay)
Specifications are subject to change without notice.
Low Latency
4.438 milliseconds
3.646 milliseconds
5.417 milliseconds
Preliminary Specification
Omni Inputs
Connector Type
Normal Operating Range
Potentiometer Operation
Voltage Tolerance
Current Output
2 discrete inputs for TTL logic, voltage control or passive resistive
2-pin "Phoenix Style" (a.k.a. "Euro Style") detachable terminal blocks
Single-ended, ground referenced
1:+(Signal) 2:-(CHASSIS GND)
Reads signals between 0-5V nominally
Use 10K for full range
+/- 48V
0.5mA with 10K pot (for passive resistive controls)
RS-232 Port
Female DB9 Connector
Neutrik Ethercon RJ45 Ruggedized Data Connector
Neutrik Ethercon RJ45 Ruggedized Data Connector
Indicators Status
CobraNet Status
DataPort Status (Port)
LCD Data Display
Yellow Link, Tx, Rx, front panel / Green Link, Tx, Rx, rear panel
Yellow Link, TX, RX, front and rear panel
Blue, front panel
Red, front panel
Tri-state (red, green, yellow), front panel
2 line x 16 character, backlit, front panel
18.89” (479.8mm) W x 1.73” (43.9mm) H x 15.00” (381.1mm) D
10.70 lb. (4.85 kg)
Specifications are subject to change without notice.
How to Contact QSC Audio Products
Mailing address:
QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
Main Number
(714) 754-6175
Sales & Marketing
(714) 957-7100 or toll free (USA only) (800) 854-4079
Customer Service
(714) 957-7150 or toll free (USA only) (800) 772-2834
Facsimile Numbers:
Sales & Marketing FAX
(714) 754-6174
Customer Service FAX
(714) 754-6173
World Wide Web:
[email protected]
[email protected]
Warranty Disclaimer (USA only; other countries, see your dealer or distributor)
QSC Audio Products, Inc. is not liable for any damage to amplifiers, loudspeakers, or any other equipment that is caused by negligence
or improper installation and/or use of this signal processing product. While QSC has endeavored to develop and produce the most
dependable and robust 'network' audio product for your use, due to the myriad of network situations and equipment that may be
encountered in its implementation, QSC cannot be held responsible for network conflicts and associated consequences that may result.
For this reason, QSC strongly recommends that the network used for implementation of QSControl products be completely separate
from all other networks, data or otherwise. As such, should you elect to integrate QSControl products with your existing network system, all risks attendant to such integration of QSControl products with your existing network or network systems are assumed by you.
While QSC strives to provide the highest quality technical solutions for networked audio products, in no event will QSC or its suppliers
be held liable for any damages, consequential, incidental or otherwise, including any claims for lost profits and/or savings resulting
from any attempted integration of QSControl products with your networking systems. No agent, employee or representative of QSC has
any authority to alter or modify in any manner, the disclosures and recommendations set forth herein.
QSC Audio Products 3 Year Limited Warranty
QSC Audio Products, Inc. ("QSC") guarantees its products to be free from defective material and / or workmanship for a period of three
(3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect
occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized service stations via prepaid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to
misuse, neglect, accident, improper installation, or where the date code has been removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific legal rights. This limited warranty is freely transferable during
the term of the warranty period.
Customer may have additional rights, which vary from state to state.
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this limited warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized dealer, will void
this limited warranty.
Periodically, this warranty is updated. To obtain the most recent version of QSC's warranty statement, please visit
Contact us at 800-854-4079 or visit our website at
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA
©2005 “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.
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