TAScam AV-452 User Guide
IEEE 1394 Interface
Powered Mixer
D00788500B
INSTALLATION & SUPPORT GUIDE
Ü
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert
ÿ
Ÿ
This appliance has a serial number
located on the rear panel. Please record
the model number and serial number
and retain them for your records.
Model number
Serial number
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 persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING: TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
IMPORTANT SAFETY INSTRUCTIONS
1 Read these instructions.
2 Keep these instructions.
3 Head all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with dry cloth.
7 Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8 Do not install near any heat sources such as radi-
ators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9 Do not defeat the safety purpose of the polarized
or grounding-type plug. A polarized plug has
two blades with one wider than the other.
Grounding type plug has two blades and a third
grounding prong. The wide blade or the third
prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete
outlet.
10 Protect the power cord from being walked on or
pinched, particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.
11 Only use attachments/accessories specified by
the manufacturer.
12 Use only with the cart, stand, tripod, bracket, or
table specified by the manufacturer or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
13 Unplug this apparatus during lightning storms or
when unused for long periods of time.
14 Refer all serving to qualified service personnel.
Servicing is required when the apparatus has
been damaged in any way, such as power-supply
cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture,
does not operate normally, or has been dropped.
● Do not expose this apparatus to drips or
splashes.
● Do not place any objects filled with liquids, such
as vases, on the apparatus.
● Do not install this apparatus in a confined space
such as a book case or similar unit.
● The apparatus draws nominal non-operating
power from the AC outlet with its POWER
switch in the off position.
2 TASCAM AV-452 Installation & Support Guide
IMPORTANT SAFETY PRECAUTIONS
IMPORTANT (for U.K. Customers)
DO NOT cut off the mains plug from this equipment.
If the plug fitted is not suitable for the power points in your home
or the cable is too short to reach a power point, then obtain an
appropriate safety approved extension lead or consult your dealer.
If nonetheless the mains plug is cut off, remove the fuse
dispose of the plug
by inadvertent connection to the mains supply.
If this product is not provided with a mains plug, or one has to be
fitted, then follow the instructions given below:
IMPORTANT: The wires in this mains lead are coloured in
accordance with the following code:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
WARNING: This apparatus must be earthed.
As the colours of the wires in the mains lead of this apparatus may
not correspond with the coloured markings identifying the
terminals in your plug proceed as follows:
The wire which is coloured GREEN-and-YELLOW must be
connected to the terminal in the plug which is marked by the letter
E or by the safety earth symbol ç or coloured GREEN or
GREEN-and-YELLOW.
immediately, to avoid a possible shock hazard
and
For U.S.A
TO THE USER
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 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 residental area
is likely to cause harmful interference in which
case the user will be required to correct the
interference at his own expense.
CAUTION
Changes or modifications to this equipment not
expressly approved by TEAC CORPORATION
for compliance could void the user’s authority to
operate this equipment.
The wire which is coloured BLUE must be connected to the
terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the
terminal which is marked with the letter L or coloured RED.
When replacing the fuse only a correctly rated approved type
should be used and be sure to re-fit the fuse cover.
IF IN DOUBT — CONSULT A COMPETENT ELECTRICIAN.
For the consumers in Europe
WARNING
This is a Class A product. In a domestic environment,
this product may cause radio interference in which
case the user may be required to take adequate
measures.
Pour les utilisateurs en Europe
AVERTISSEMENT
Il s’agit d’un produit de Classe A. Dans un environnement domestique, cet appareil peut provoquer des interférences radio, dans ce cas l’utilisateur peut être
amené à prendre des mesures appropriées.
Für Kunden in Europa
Warnung
Dies is eine Einrichtung, welche die Funk-Entstörung
nach Klasse A besitzt. Diese Einrichtung kann im
Wohnbereich Funkstörungen versursachen ; in diesem Fall kann vom Betrieber verlang werden, angemessene Maßnahmen durchzuführen und dafür
aufzukommen.
TASCAM AV-452 Installation & Support Guide 3
Table of Contents
1 – Introduction
“AV installation” features ......................................................................5
About this manual ..................................................................................5
How the manual is organized................................................................6
2 – General installation notes
Physical installation ................................................................................7
Power supply...........................................................................................7
3 – Front panel features
Microphone channels..............................................................................8
AV control and selection section................................................................... 8
Main control section ...............................................................................9
4 – Remote control unit features
Learning command codes.......................................................................11
5 – Rear panel connections
Video connections...................................................................................12
AV audio and microphone connections ................................................13
“Master” audio connections...................................................................14
External control connectors ...................................................................15
6 – Customization and settings
LEARN IR (switch 1) ........................................................................................ 16
CASCADE (switch 2)........................................................................................ 17
SPEAKER OUT (switch 3) ................................................................................ 17
MIC HPF (switch 4).......................................................................................... 17
INTERCOM GATE (switch 5) ........................................................................... 17
AV DUCKER (switch 6).................................................................................... 17
7 – External control
AV-452 serial protocol ............................................................................18
Serial port pinouts.......................................................................................... 18
Relay control port ...................................................................................19
IR “blaster”...................................................................................................... 19
RELAY CONTROL pinouts............................................................................... 19
8 – Specifications and block diagram
Video specifications ................................................................................20
AV audio and microphone specifications..............................................20
Master section specifications .................................................................21
Audio performance .................................................................................21
Power and physical specifications .........................................................22
Dimensional drawing..............................................................................22
Block diagram..........................................................................................23
4 TASCAM AV-452 Installation & Support Guide
1 – Introduction
The TASCAM AV-452 coordinates the audio/visual
needs for presenters of all levels. Functionally, the
AV-452 serves as a microphone mixer, A/V receiver,
and power amplifier into one compact unit. The control surface is elegant and intuitive.
Audio: Four microphone inputs (with phantom
power) offer plenty of inputs for multiple presenters,
or multiple speaking positions. Up to two audio and
three audio/visual components can be connected to
the A/V channel, with simple switching control. A
3-band EQ is available on each channel to enhance
the individual sounds as needed.
Video: The AV-452 will perform video switching
between three A/V components, offering a single
video feed for projectors or monitors with limited in-
“AV installation” features
Special additional features of the AV-452 relevant to
fixed installation:
• Microphones can be connected using either XLRtype connectors or using a barrier strip and can be
phantom powered, allowing the use of miniature
condenser or PZM (boundary field) microphones.
• Switchable 80 Hz bass roll-off to eliminate lowfrequency rumble.
• Microphone insert loop for parametric EQ, compresser/limiter/gate, etc.
• AV signal dimmer to allow manual voiceovers, etc.
• Automatic AV ducker with adjustable ratio and
threshold settings.
• A CV (constant voltage) paging system can be connected (12V, 24V or 70V) to the rear panel. A level
puts. Switching is done in parallel, and video switching is handled for composite and S-Video inputs.
Control: The RC-452 universal learning remote is
included with the AV-452, allowing the presenter to
operate all the key equipment with a single remote.
The RC-452 will control the AV-452, and can learn
commands for projector power, and transport commands for up to four components.
The AV-452 itself also can learn IR commands, to integrate projector/monitor switching with the AV-452
internal switching. This IR command set can be
transmitted with an IR “blaster” (not included) to the
37-pin ‘D’-sub
control port" on page 18 for details).
control and defeatable noise gate are provided for
optimal settings.
• A building alarm system can be connected to the
EMG input. When the alarm sounds, the AV-452
will mute local audio, and switch the CV paging
input on.
• The speaker and line output have independent
mono switches for use in single-zone or multi-zone
systems.
• Cascade input can be configured to combine the
input as a submixer, or operate as "room cascade",
allowing the AV-452 to become a drone amp.
• Dedicated unbalanced
together with balanced
connection with other equipment.
• Serial (RS-232) and relay (37-pin D-sub) connectors allow for control of the unit by other devices.
RELAY CONTROL port (see "Relay
MEETING OUT jacks,
LINE OUT jacks allow for
About this manual
This manual is intended for use by those designing,
installing and supporting the AV system including
the AV-452. It is not necessary for the everyday user
of the equipment to read this manual.
The user should refer to the single-sheet Operation
Guide for a quick reference on how to operate the
unit. However, a brief guide to the front panel, and
remote control unit is given here, and this also provides some information which can be used when introducing the operation of the unit to its users.
We suggest that the Operation Guide is kept close to
the AV-452, and the spaces on this sheet are filled in,
for a written record of the permanent connections
made between the AV-452 and other equipment.
Note that controls and connectors on the unit and the
remote control unit are written in this typeface:
OUTPUT
ferred to by a number, corresponding to the numbers
in the diagrams "Front panel features" on page 8,
"Remote control unit features" on page 10 and "Rear
panel connections" on page 12. In these cases, a feature of the main unit is numbered like this:
feature of the remote control unit like this:
Controls and connectors on other units are written in
this way: REC IN.
TASCAM AV-452 Installation & Support Guide 5
. Sometimes a control or connector is re-
LINE
1, and a
2.
1 – Introduction
How the manual is organized
The different sections of the manual are as follows:
1, “Introduction” (page 5) This introduction
to the AV-452.
2, “General installation notes” (page 7)
As the title suggests, this includes general notes on
the physical and electrical installation requirements
for the AV-452.
3, “Front panel features” (page 8) As well
as a list of the front panel controls and features, this
section provides details on the operation of the AV-
452. Read this section to obtain an overview of the
way in which the AV-452 works.
4, “Remote control unit features” (page
10)
This provides a list of the features and functions
available using the RC-452 remote control unit, as
well as details on how to program the RC-452 to
learn and replay the command codes of other units.
5, “Rear panel connections” (page 12)
This lists the connections to and from the AV-452.
6, “Customization and settings” (page
16)
The AV-452 can be customized for the individual installations in a number of ways, using the rear
panel switches, etc. This section describes the way in
which this customization can be carried out, including the way in which the AV-452 can learn the IR
codes necessary to control external devices.
7, “External control” (page 18) The AV-452
can be controlled by an external serial controller, and
this section lists the control codes available for control, status, and query. Additionally, relay control and
tally indicator connectors are provided. Details of
these are given in this section.
8, “Specifications and block diagram”
(page 20) Performance figures, dimensional draw-
ings and a block diagram of the AV-452.
6 TASCAM AV-452 Installation & Support Guide
2 – General installation notes
These notes provide you with information about the
installation of the AV-452.
The packing should contain (in addition to this
manual):
•The User’s Guide—a single sheet containing oper-
ating instructions
• A power cord with a 3-pin plug suitable for your
region
Physical installation
The unit can be fitted in any standard 19" rack, using
the mounting kit (screws and washers) provided. No
rear support is needed.
3U of rack space is required for the unit itself. Since
the AV-452 incorporates power amplifiers, it is
strongly recommended that at least 1U of space is
left above the unit to avoid overheating.
NOTE
Do not install this apparatus in a confined space such as
a book case or similar unit.
• A rack mounting kit consisting of four screws and
four washers
• The RC-452 remote control unit
• Two AAA batteries for use in the RC-452 remote
control unit
• Warranty card
Contact your TASCAM dealer or distributor if any of
these items is missing.
For the same reason, adequate space for ventilation
should be left at the front and rear of the unit. In any
case, the space at the rear of the unit should be sufficient to accommodate the audio and video connectors plugged into the AV-452.
Since many of the functions of the unit are set using
small preset controls (trimmer pots, DIP switches,
etc.) on the rear panel, we suggest that you ensure
you have clear visual access to the rear panel, or that
you make these settings before final installation in
the rack.
Power supply
The AV-452 can use an AC power supply as marked
on the rear panel. Do not use any other voltage of
power supply, as this may result in damage.
The unit should be properly grounded (earthed).
The power switch is located on the rear panel to prevent the user from accidentally turning power off
during a presentation. If you want to turn the system
on and off routinely, you may consider using a power
switch for the outlets, or using a centrally-switched
power distribution system.
TASCAM AV-452 Installation & Support Guide 7
3 – Front panel features
A brief guide to the front panel features of the AV452, with a little more technical detail than in the Op-
eration Guide.
Microphone channels
Each of the four microphone channels is identically
equipped.
3
1
2
4
5
It can be used as a quick reference guide for everyday
operation, or to form the basis for an introductory explanation to the users of the equipment.
1 MUTE key This latching key lights when the
mic input channel is muted.
2 Fader The unity gain for this fader is at the 7
mark.
3 OL indicator Lights at 10 dB above the nom-
inal clipping level.
4 GAIN control Provides 33 dB of control to
adjust the mic level appropriately.
5 EQ section 3 bands, each providing ±10 dB
at the following frequencies (optimized for voice):
HI: 8 kHz (shelving)
MID: 2.5 kHz (peaking)
LO: 250 Hz (shelving)
AV control and selection section
This section is used to select the appropriate AV
source, and control the sound.
89 A B
6
7
6 DIM key This latching key is used to attenuate
the AV source signal by 20 dB. It lights when dimming is active.
7 Fader The unity gain for this fader, which is
used to control the level of the selected AV signal, is
at the maximum level.
8 REC MONITOR control/indicator De-
spite the name, this control and indicator acts a
record source selector.
•In the
SOURCE position, the output of the signal
selected using the AV selector keys is fed to the
inputs of all connected equipment (except the
source unit, to avoid signal loops). For example, if
the cassette is selected, the cassette output is fed to
the CD-RW and VCR inputs. The indicator lights.
•In the
•In the
CASS position, the cassette output is fed to
the CD-RW and VCR inputs, regardless of the AV
selector keys.
CD-RW position, the CD-RW output is fed to
the cassette and VCR inputs, regardless of the AV
selector keys.
9 EQ section 3 bands, each providing ±10 dB
at the following frequencies:
HI: 12 kHz (shelving)
MID: 2.5 kHz (peaking)
LO: 100 Hz (shelving)
A AV source selector keys Only one of
these latching keys can be active (lit) at a time. Used
to select the AV source.
NOTE
If the
REC MONITOR
are the same, the source output is muted, to avoid a
feedback loop.
Also note that if an audio-only source has been selected
(
CASSETTE, CD-RW
ONLY
setting), the last-selected video source will be
output through the video connectors.
selection and the selection here
or
AUX IN
on the
AUDIO
8 TASCAM AV-452 Installation & Support Guide
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