Tascam MA-AD8 Manuel utilisateur
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MA-AD8
Digital Mic Amplifier
OWNER’S MANUAL
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.
The exclamation point within an equilateral triangle is intended to alert the user to the pres-
ence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.
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 persons..
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
Ü
ÿ
Ÿ
WARNING: TO PREVENT FIRE OR SHOCK
HAZARD, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
D00444800A
2
TASCAM MA-AD8
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 and dispose of the plug immediately, to avoid
a possible shock hazard 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.
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.
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.
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 MA-AD8
3
CAUTION:
…
Read all of these Instructions.
…
Save these Instructions for later use.
…
Follow all Warnings and Instructions marked on the audio
equipment.
1) Read Instructions
— All the safety and operating instructions should
be read before the product is operated.
2) Retain Instructions
— The safety and operating instructions should
be retained for future reference.
3) Heed Warnings
— All warnings on the product and in the operating
instructions should be adhered to.
4) Follow Instructions
— All operating and use instructions should be
followed.
5) Cleaning
— Unplug this product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for clean-
ing.
6) Attachments
— Do not use attachments not recommended by the
product manufacturer as they may cause hazards.
7) Water and Moisture
— Do not use this product near water — for
example, near a bath tub, wash bowl, kitchen sink, or laundry tub; in a wet
basement; or near a swimming pool; and the like.
8) Accessories
— Do not place this product on an unstable cart, stand,
tripod, bracket, or table. The product may fall, causing serious injury to a
child or adult, and serious damage to the product. Use only with a cart,
stand, tripod, bracket, or table recommended by the manufacturer, or sold
with the product. Any mounting of the product should follow the manufac-
turer’s instructions, and should use a mounting accessory recommended by
the manufacturer.
9)
A product and cart combination should be moved with care. Quick stops,
excessive force, and uneven surfaces may cause the product and cart com-
bination to overturn.
10)
Ventilation
— Slots and openings in the cabinet are provided for ven-
tilation and to ensure reliable operation of the product and to protect it
from overheating, and these openings must not be blocked or covered. The
openings should never be blocked by placing the product on a bed, sofa,
rug, or other similar surface. This product should not be placed in a built-in
installation such as a bookcase or rack unless proper ventilation is provided
or the manufacturer’s instructions have been adhered to.
11) Power Sources
— This product should be operated only from the
type of power source indicated on the marking label. If you are not sure of
the type of power supply to your home, consult your product dealer or local
power company. For products intended to operate from battery power, or
other sources, refer to the operating instructions.
12) Grounding or Polarization
— This product may be equipped with a
polarized alternating-current line plug (a plug having one blade wider than
the other). This plug will fit into the power outlet only one way. This is a
safety feature. If you are unable to insert the plug fully into the outlet, try
reversing the plug. If the plug should still fail to fit, contact your electrician
to replace your obsolete outlet. Do not defeat the safety purpose of the
polarized plug.
13) Power-Cord Protection
— Power-supply cords should be routed so
that they are not likely to be walked on or pinched by items placed upon or
against them, paying particular attention to cords at plugs, convenience
receptacles, and the point where they exit from the product.
14) Outdoor Antenna Grounding
— If an outside antenna or cable
system is connected to the product, be sure the antenna or cable system is
grounded so as to provide some protection against voltage surges and built-
up static charges. Article 810 of the National Electrical Code, ANSI/NFPA
70, provides information with regard to proper grounding of the mast and
supporting structure, grounding of the lead-in wire to an antenna discharge
unit, size of grounding conductors, location of antenna-discharge unit, con-
nection to grounding electrodes, and requirements for the grounding elec-
trode.
"Note to CATV system installer:
This reminder is provided to call the CATV system installer’s attention to
Section 820-40 of the NEC which provides guidelines for proper grounding
and, in particular, specifies that the cable ground shall be connected to the
grounding system of the building, as close to the point of cable entry as
practical.
15) Lightning
— For added protection for this product during a lightning
storm, or when it is left unattended and unused for long periods of time,
unplug it from the wall outlet and disconnect the antenna or cable system.
This will prevent damage to the product due to lightning and power-line
surges.
16) Power Lines
— An outside antenna system should not be located in
the vicinity of overhead power lines or other electric light or power circuits,
or where it can fall into such power lines or circuits. When installing an
outside antenna system, extreme care should be taken to keep from touch-
ing such power lines or circuits as contact with them might be fatal.
17) Overloading
— Do not overload wall outlets, extension cords, or
integral convenience receptacles as this can result in risk of fire or electric
shock.
18) Object and Liquid Entry
— Never push objects of any kind into
this product through openings as they may touch dangerous voltage points
or short-out parts that could result in a fire or electric shock. Never spill
liquid of any kind on the product.
19) Servicing
— Do not attempt to service this product yourself as open-
ing or removing covers may expose you to dangerous voltage or other
hazards. Refer all servicing to qualified service personnel.
20) Damage Requiring Service
— Unplug this product from the wall
outlet and refer servicing to qualified service personnel under the following
conditions:
a)
when the power-supply cord or plug is damaged.
b)
if liquid has been spilled, or objects have fallen into the product.
c)
if the product has been exposed to rain or water.
d)
if the product does not operate normally by following the operating
instructions. Adjust only those controls that are covered by the operating
instructions as an improper adjustment of other controls may result in
damage and will often require extensive work by a qualified technician to
restore the product to its normal operation.
e)
if the product has been dropped or damaged in any way.
f )
when the product exhibits a distinct change in performance – this
indicates a need for service.
21) Replacement Parts
— When replacement parts are required, be
sure the service technician has used replacement parts specified by the
manufacturer or have the same characteristics as the original part.
Unauthorized substitutions may result in fire, electric shock, or other
hazards.
22) Safety Check
— Upon completion of any service or repairs to this
product, ask the service technician to perform safety checks to determine
that the product is in proper operating condition.
23) Wall or Ceiling Mounting
— The product should be mounted to a
wall or ceiling only as recommended by the manufacturer.
24) Heat
— The product should be situated away from heat sources such
as radiators, heat registers, stoves, or other products (including amplifiers)
that produce heat.
ANTENNA
LEAD IN
WIRE
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250. PART H)
NEC - NATIONAL ELECTRICAL CODE
ELECTRIC
SERVICE
EQUIPMENT
Example of Antenna Grounding as per
National Electrical Code, ANSI/NFPA 70
GROUND
CLAMP
IMPORTANT SAFETY INSTRUCTIONS
4
TASCAM MA-AD8
MA-AD8 Digital Mic Amplifier
The TASCAM MA-AD8 Digital Mic Amplifier pro-
vides eight channels of analog-to-digital conversion at
20-bit resolution into TDIF-1 digital audio format,
suitable for connection to a suitably-equipped digital
mixing console or to a DTRS recorder, etc. The unit is
housed in a convenient and compact 1U rack-mount
format.
Two TDIF-1 connectors are provided, allowing the
simultaneous connection of a digital mixing console
and digital recorder. Each connector carries eight
channels of TDIF-1 format audio for input or output.
The source of the output to one of the TDIF-1 connec-
tors may be selected, in pairs of channels, as either the
analog inputs or the other TDIF-1 connector. This
allows a great deal of flexibility in recording situa-
tions, without the need for digital patching.
Together with the analog-to-digital convertors, the
MA-AD8 also provides high-quality microphone
amplifiers for ultimate sonic quality when making dig-
ital recordings.
Selectively switchable phantom power is available on
the balanced microphone inputs, allowing a range of
different microphones to be connected.
A –22 dB
PAD
and a flexible
TRIM
control on each
channel allow these inputs to be used with line-level
signal sources as well as with microphone-level
sources.
The word clock source for the MA-AD8 may be either
of the two TDIF-1 connections, or an external inde-
pendent word clock.
Front panel switches and indicators provide instant
control and status indication of the MA-AD8’s opera-
tion at all times.
1.1 Front panel
1
POWER switch and indicator
Push the
POWER
switch once to turn on power, and
again to turn it off. The
POWER
indicator lights when
power is supplied to the MA-AD8.
2
LOCKED indicator
This indicator lights when a valid clock signal is
received from the selected clock source (see
CLOCK
SWITCH
3
).
If no clock signal is received at the selected source, or
if the clock signal is outside the limits of tolerance
(44.1 kHz or 48 kHz, ±6%) this indicator will not
light, and the unit will not function.
3
CLOCK switch
This switch allows the selection of the clock source
that will be used to synchronize the digital audio out-
put of the MA-AD8. The two settings are
WORD
(the
WORD IN
e
connector will be used as the clock
source) and
TDIF-1
(either
DIGITAL I/O1 (FROM
MIC INPUTS)
q
or
DIGITAL I/O2 (AUX)
w
will be
used, depending on the setting of the
STATUS
switch
4
).
WARNING
There should never be more than one word
clock signal in a digital audio system. If there
are not, at worst, damage may occur to speak-
ers, amplifiers, etc. as a result of high-fre-
quency noise generated by word clock
incompatibilities.
4
STATUS switch
If the
CLOCK
switch
3
is set to
TDIF-1
, this switch
is used to select which of the TDIF-1 connectors
(
DIGITAL I/O1 (FROM MIC INPUTS)
q
or
DIGITAL I/O2 (AUX)
w
) will be used to provide the
clock source.
In addition to the clock source, the selected TDIF-1
connector provides the MA-AD8 with FS Code,
emphasis, and other status information, whether or not
the
CLOCK
switch is set to
TDIF-1
.
5
INPUT switches
These four switches determine the source of the signal
passed to the
DIGITAL I/O1 (FROM MIC INPUTS)
q
. These switches work in pairs,
1/2
,
3/4
, etc.
MA-AD8 Digital Mic Amplifier
TASCAM MA-AD8
5
When one of these switches is in the up position, the
signals passed to the
DIGITAL I/O1
connector for the
corresponding channels will be the appropriate mic
inputs (the XLR connectors on the rear panel).
When one of these switches is in the down position,
the signal passed to the
DIGITAL I/O1
connector for
the corresponding channels will be the two appropriate
channels of the digital audio received at
DIGITAL I/
O2 (AUX)
w
.
This allows digital repatching of multitrack recorders
to the mixer on overdubbing and mixdown etc. without
the need to disconnect and re-connect cables.
NOTES
When these switches are operated, an audible
click may occur. To avoid damage to monitor
speakers, etc., turn down the level of all moni-
toring equipment before operating these
switches.
The digital signals received at the
DIGITAL I/O1
connector are always output to
the
DIGITAL I/O2
connector, and cannot be
rerouted.
6
OL indicators (1–8)
These indicators light when the signal fed to the A/D
converter for the channel (post-pad and post
TRIM
)
outputs a signal which is more than –3 dB, relative to
the digital “full-scale” level.
7
TRIM controls (1–8)
The
TRIM
controls adjust the level of the signal before
it is passed to the A/D converter. They work in a simi-
lar way to TRIM controls on a mixing console; turn
clockwise to increase the gain, counter-clockwise to
reduce it.
The
TRIM
controls provide 42 dB of gain control.
8
PAD switches (1–8)
When engaged, these
PAD
switches provide 22 dB of
attenuation to the corresponding channel. Use them in
conjunction with the
TRIM
controls to input line-level
sources through the MA-AD8.
1.2 Rear panel
9
MIC INPUTS (1–8)
These balanced XLR-type input connectors are wired:
A
PHANTOM (+48V) switches
These switches control the +48 V phantom power sup-
ply to the
MIC INPUT
s. Each switch controls the
phantom power supplied to a group of four inputs—1
through 4, and 5 through 8.
They each have three positions, which allow the first
two inputs of the group (
1–2
and
5–6
) to be supplied
with phantom power (phantom power to the other two
inputs of the group will be turned off), to all inputs of
the group, or off for all inputs in the group.
Note that it is not possible to supply phantom power
only to the second pair of inputs in a group.
To avoid damage to monitor speakers, etc., turn down
the level of all monitoring equipment before operating
these switches.
WARNING
Do not connect unbalanced signal sources
(dynamic microphones, instruments, etc.) to a
MIC INPUT
connector with phantom power
supplied to that connector. This will result in
possible damage to the signal source, and to
the MA-AD8.
MICROPHONE CABLES AND MICROPHONES
CONNECTION: T
O
PREVENT
HAZARD OR DAMAGE,
ENSURE THAT ONLY MICROPHONE CABLES AND MICRO-
PHONES DESIGNED TO THE IEC 268-15A STANDARD
ARE CONNECTED.
CONNEXIONS DES MICROPHONES ET DE
LEURS CABLES: POUR EVITER TOUT ENDOMMAGE-
MENT, S’ASSURER DE BRANCHER UNIQUEMENT DES
MICROPHONES ET DES CABLES DE MICROPHONES
CONÇUS SELON LA NORME IEC 268-15A.
1 GND
2 Hot (+)
3 Cold (–)
MA-AD8 Digital Mic Amplifier
6
TASCAM MA-AD8
BDIGITAL I/O1 (FROM MIC INPUTS)
This connector is typically used to connect a TDIF-1-
equipped mixing console.
The digital audio signals received at this connector
will always be passed through to the DIGITAL I/O2
(AUX) w connector. This cannot be changed.
The digital audio signals output from this connector
are selected from either the MA-AD8 A/D converters
or from the signals received at the DIGITAL I/O2
(AUX) w connector, depending on the settings of the
INPUT switches 5.
WARNING
Note that you should always use genuine TAS-
CAM cables, or cables which have been
approved for use with TDIF-1 interfaces by
TASCAM.
Although these cables appear similar to certain
types of computer cables and use similar con-
nectors, the cables themselves are very differ-
ent, and the different electrical characteristics
of the cables can cause damage to the equip-
ment connected with the wrong cables.
If the use of cables other than TASCAM cables
causes or results in damage, the warranty is
voided.
CDIGITAL I/O2 (AUX)
This connector is typically used to connect a TDIF-1-
equipped multitrack recorder, such as a DTRS
recorder.
The digital audio signals output from this connector
will always be the digital audio signals received from
the DIGITAL I/O1 (FROM MIC INPUTS) q con-
nector. This cannot be changed.
The digital audio signals received at this connector
may be used as sources for the DIGITAL I/O1 (FROM
MIC INPUTS) q connector, depending on the setting
of the INPUT switches 5.
DWORD IN
An external word clock may be connected to this BNC
connector (75Ω), and used as the word synchroniza-
tion for the MA-AD8, selected with the CLOCK
switch 3.
EWORD THRU
This BNC connector echoes the clock signal received
at the WORD IN e connector. If no device is con-
nected here, the word clock chain is automatically ter-
minated.
1.3 A practical example of using
the MA-AD8
Since the MA-AD8 provides a good deal of flexibility,
it may be useful to review a typical situation in which
it may be used.
1.3.1Recording multitrack tracks
In a multitrack situation, the initial tracks may be laid
down using the following setup:
In this example, all the INPUT switches 5 on the
MA-AD8 are set to accept signals from the internal A/
D convertors (i.e. from the MIC sources) ➀. The signal
then goes from the DIGITAL I/O1 port into the mixer
➁, which can now use channels 9 through 16 as addi-
tional inputs from analog sources. The group busses
are routed back through the TDIF-1 connector ➂ and
are passed through the MA-AD8’s DIGITAL I/O2
connector to the DTRS recorder ➃.
The word clock originates in the TM-D1000, and the
CLOCK switch on the MA-AD8 is therefore set to
TDIF-1, and the STATUS switch to D I/O1. This
clock is passed through the TDIF-1 connection to the
DTRS recorder.
1.3.2Mixdown
When mixing down, the situation is simplified as
shown below:.
The INPUT switches 5 of the MA-AD8 are set to the
TDIF-1 setting and the tape tracks are replayed into
TM-D1000
Digital Mixer
DA-38
DTRS recorder
MA-AD8
DIGITAL I/O1
DIGITAL I/O2
➀➂
➃
➁
TM-D1000
Digital Mixer
DA-38
DTRS recorder
MA-AD8
DIGITAL I/O1
DIGITAL I/O2
➀
➁
➂
MA-AD8 Digital Mic Amplifier
TASCAM MA-AD8
7
the DIGITAL I/O2 port ➀. They are then passed
straight through to the DIGITAL I/O2 port connected
to the mixer ➁.
If necessary, other analog inputs (e.g. MIDI-sequenced
instruments) may be played through channels 1
through 8 of the mixer simultaneously with the
replayed digital tracks from the DTRS recorder.
The advantage of using the MA-AD8 in this situation
is that the digital audio cabling is permanent—no dis-
connection and re-connection of cables needs to be
done, and the MA-AD8’s front panel switches provide
convenient re-routing facilities.
1.4 Specifications
MIC INPUTs (1–8) XLR-type, balanced
inputs
Input impedance 2.4 k
Ω
OL (overload) indicator 1–8 Lights at 3 dB below
digital full-scale level
TRIM range 42 dB
PAD attenuation 22 dB
Input level (TRIM at max) –56 dBu
Input level (TRIM at min) –14 dBu
S/N ratio (IHF-A, 150
Ω
terminated) >86 dB (TRIM at maxi-
mum), >94 dB (TRIM at
minimum)
Crosstalk between adjacent
channels >80 dB @ 10 kHz
Frequency response 20 Hz to 22 kHz
+0.5/1.0 dB
(Fs=48 kHz)
T.H.D. (@ 1 kHz) <0.03% (TRIM at minu-
mum, nominal level)
Digital output format TDIF-1
Sampling frequency 44.1 kHz, 48 kHz, ±6%
A/D resolution 20 bit
Clock source D I/O1, D I/O2, external
word clock
LOCKED indicator Lights when valid clock
source received at
selected input
WORD CLOCK IN 75
Ω
WORD CLOCK THRU 75
Ω
(auto terminating)
Dimensions (w x h x d) 482 x 48 x 210 (mm)
19 x 1.9 x 8.3 (in)
Weight 2.2 kg (5.5 lbs)
Power supply 120 V (USA/Canada)
230 V (Europe)
240 V (Australia)
Power consumption 10W
Supplied accessories Rack mounting kit
1.4.1 Dimensional drawing
MA-AD8 Digital Mic Amplifier
8
TASCAM MA-AD8
1.4.2 Block diagram
TEAC CORPORATION
Phone: (0422) 52-5082 3-7-3, Nakacho, Musashino-shi, Tokyo 180-8550, Japan
TEAC AMERICA, INC.
Phone: (213) 726-0303 7733 Telegraph Road, Montebello, California 90640
TEAC CANADA LTD.
Phone: 905-890-8008 Facsimile: 905-890-9888 5939 Wallace Street, Mississauga, Ontario L4Z 1Z8, Canada
TEAC MEXICO, S.A. De C.V
Phone: 5-658-1943 Privada De Corina, No.18, Colonia Del Carmen Coyoacon, Mexico DF 04100
TEAC UK LIMITED
Phone: 01923-819699 5 Marlin House, Marlins Meadow, The Croxley Centre, Watford, Herts. WD1 8YA, U.K.
TEAC DEUTSCHLAND GmbH
Phone: 0611-71580 Bahnstrasse 12, 65205 Wiesbaden-Erbenheim, Germany
TEAC FRANCE S. A.
Phone: 01.42.37.01.02 17 Rue Alexis-de-Tocqueville, CE 005 92182 Antony Cedex, France
TEAC BELGIUM NV/SA
Phone: 0031-30-6048115 P.A. TEAC Nederland BV, Perkinsbaan 11a, 3439 ND Nieuwegein, Netherlands
TEAC NEDERLAND BV
Phone: 030-6030229 Perkinsbaan 11a, 3439 ND Nieuwegein, Netherlands
TEAC AUSTRALIA PTY.,LTD. A.C.N. 005 408 462
Phone: (03) 9644-2442 106 Bay Street, Port Melbourne, Victoria 3207, Australia
TEAC ITALIANA S.p.A.
Phone: 02-66010500 Via C. Cantù 11, 20092 Cinisello Balsamo, Milano, Italy
PRINTED IN JAPAN 1098U0.6 M-1427A
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Tascam MA-AD8 Manuel utilisateur
- Catégorie
- Amplificateurs audio
- Taper
- Manuel utilisateur
dans d''autres langues
- English: Tascam MA-AD8 User manual