Harman Studer D21m User manual

Studer D21m
I/O System Components
Operating Instructions
(January 2012, 21st Edition)

Prepared and edited by Copyright by Studer Professional Audio GmbH
Studer Professional Audio GmbH
Technical Documentation Order no. BD10.275102-U (0112)
Riedthofstrasse 214
CH-8105 Regensdorf – Switzerland
http://www.studer.ch Subject to change
Studer is a registered trade mark of Studer Professional Audio GmbH, Regensdorf

I
For Your Own Safety and to Avoid Invalidation of the Warranty
Please Read This Section Carefully
 • Readtheseinstructions.
 • Keeptheseinstructions.
 • Heedallwarnings.
 • Followallinstructions.
 • Donotusethisapparatusnearwater.
 • Cleanonlywithadrycloth.
 • Donotblockanyventilationopenings.Installinaccordancewith the
manufacturer'sinstructions.
 • Donotinstallnearanyheatsourcessuch as radiators, heat registers,
stoves,orotherapparatus(includingamplifiers)thatproduceheat.
 • Donotdefeatthesafetypurposeofapolarisedorgroundingtypeplug.A
polarisedplughastwobladeswithonewiderthantheother.A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
 • Protectthepowercordfrombeingwalkedonorpinchedparticularly
atplugs,conveniencereceptaclesandthepointwheretheyexitfromthe
apparatus.
 • Onlyuseattachments/accessoriesspecifiedbythemanufacturer.
 • 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cau-
tionwhenmovingthecart/apparatuscombinationtoavoidinjuryfrom
tip-over.
 • Referallservicingtoqualifiedservicepersonnel.Servicingisrequired
whentheapparatushasbeendamagedinanyway,suchasthepower
supplycordorplugisdamaged,liquidhasbeenspilledorobjectsfallen
intotheapparatus,theapparatushasbeenexposedtorainormoisture,
doesnotoperatenormally,orhasbeendropped.
 Note: Itisrecommendedthatallmaintenance and service ontheproduct
shouldbecarriedoutbyStuderoritsauthorisedagents.Studercannot
acceptanyliabilitywhatsoeverforanylossordamagecausedbyservice,
maintenanceorrepairbyunauthorisedpersonnel.
 WARNING: Toreducetheriskoffireorelectricshock,donotexposethisapparatus
torainormoisture.Donotexposetheapparatustodrippingorsplashing
anddonotplaceobjectsfilledwithliquids,suchasvases,ontheappara-
tus.
 • Nonakedflamesources,suchaslightedcandles,shouldbeplacedonthe
apparatus.
 • Ventilationshouldnotbeimpededbycoveringtheventilationopenings
withitemssuchasnewspapers,tablecloths,curtainsetc.
 WARNING: Donotusethisapparatusinverydustyatmospheres,orinatmospheres
containingflammablegasesorchemicals.
 • THISAPPARATUSMUSTBEEARTHED. Undernocircumstances
shouldthesafetyearthbedisconnectedfromthemainslead.
 • Themainssupplydisconnectdeviceisthemainsplug.Itmustremain
accessiblesoastobereadilyoperablewhentheapparatusisinuse.
 • Ifanypartofthemainscordsetisdamaged,thecompletecordsetshould
bereplaced.Thefollowinginformationisforreferenceonly.Thewires
inthemainsleadarecolouredinaccordancewiththefollowingcode:
Safety Information

II
• Protective Earth (Ground):Green/Yellow (US: GreenorGreen/
Yellow)
  • Neutral:Blue(US:White)
  • Live(Hot):Brown(US:Black)
  Asthecoloursofthewiresinthemainslead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withtheletterEorbythe
earthsymbol.
  • ThewirewhichiscolouredBluemustbeconnectedtotheterminalin
theplugwhichismarkedwiththeletterN.
  • ThewirewhichiscolouredBrownmustbeconnectedtotheterminal
intheplugwhichismarkedwiththeletterL.
  Ensurethatthesecolourcodesarefollowedcarefullyintheeventofthe
plugbeingchanged
 • Thisunit is capableofoperating overarangeof mains voltages, as
markedontherearpanel.
LithiumBattery
!
 Installedlithiumbatteriesmustbereplacedbythesameoranequivalent
type.Dangerofexplosionifbatteriesareincorrectlyreplacedorwhen
terminalsareshorted.
!
 Installedlithiumbatteriesmustnotbeexposedtoexcessiveheatsuchas
directsunshine,fireorthelike.
 Note: 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 gen-
erates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interfer-
ence to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
This Class A digital apparatus meets the requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe A respecte toutes les exigences du Règle-
ment sur le matériel brouilleur du Canada.
WorkingSafelyWithSound Although your new console will not make any noise until you feed it signals,
it has the capability to produce sounds that, when monitored through a moni-
tor system or headphones, can damage hearing over time.The table below is
taken from the Occupational Safety & Health Administration directive on
occupational noise exposure (1926.52):
PermissibleNoiseExposure: Duration per day [h] Sound level [dBA, slow response]
!
8 90
6 92
4 95
3 97
2 100
1.5 102
1 105
0.5 110
<0.25 115
Safety Information

III
Conforming to this directive will minimise the risk of hearing damage caused
by long listening periods. A simple rule to follow is: The longer you listen, the
lower the average volume should be. Please take care when working with your
audio system – if you are manipulating controls which you don’t understand
(which we all do when we are learning), make sure your monitoring level is
turned down. Remember that your ears are the most important tool of your
trade. Look after them, and they will look after you. Most importantly: Don’t
be afraid to experiment to find out how each parameter affects the sound;
this will extend your creativity and help you to get the best results.
A1 Safety Symbol Guide
For your own safety and to avoid invalidation of the warranty, all text marked
with these symbols should be read carefully.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ACHTUNG
GEFAHR: ELEKTRISCHER SCHLAG
NICHT ÖFFNEN
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
To reduce the risk of electric shock, do not remove covers. No user-serviceable
parts inside. Refer servicing to qualified service personnel (i.e., persons
having appropriate technical training and experience necessary to be aware
of hazards to which they are exposed in performing a repair action, and of
measures to minimize the danger of themselves).
The lightning flash with arrowhead symbol is intended to alert the user to the
presence of un-insulated “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.
!
Headphones safety warnings contain important information and useful tips
on headphone outputs and monitoring levels.
CLASS 1
LASER PRODUCT
CLASS 1
LED PRODUCT
Assemblies or sub-assemblies of this product can contain opto-electronic
devices. As long as these devices comply with Class I of laser or LED prod-
ucts according to EN 60825-1:1994, they will not be expressly marked on
the product. If a special design should be covered by a higher class of this
standard, the device concerned will be marked directly on the assembly or
sub-assembly in accordance with the above standard.
A2 First Aid
InCaseofElectricShock: Separate the person as quickly as possible from the electric power source:
  • Byswitchingtheequipmentoff,
  • Byunpluggingordisconnectingthemainscable,or
  • Bypushingthepersonawayfromthepowersource,usingdryinsulating
material (such as wood or plastic).
  • Afterhavingsufferedanelectricshock,alwaysconsultadoctor.
Warning! Do not touch the person or his clothing before the power is turned off,
otherwise you stand the risk of suffering an electric shock as well!
IfthePersonisUnconscious:  • Laythepersondown
  • Turnhimtooneside
  • Checkthepulse
  • Reanimatethepersonifrespirationispoor
  • Callforadoctorimmediately.
Safety Information

IV
B General Installation Instructions
Please consider besides these general instructions also any product-specific
instructions in the “Installation” chapter of this manual.
B1 Unpacking
Check the equipment for any transport damage. If the unit is mechanically
damaged, if liquids have been spilled or if objects have fallen into the unit,
it must not be connected to the AC power outlet, or it must be immediately
disconnected by unplugging the power cable. Repair must only be performed
by trained personnel in accordance with the applicable regulations.
B2 Installation Site
Install the unit in a place where the following conditions are met:
  • Thetemperatureandtherelativehumidityoftheenvironment must be
within the specified limits during operation of the unit. Relevant values
are the ones at the air inlets of the unit (refer to Appendix 1).
  • Condensationmustbeavoided.Iftheunitisinstalledinalocationwith
largevariationofambienttemperature(e.g.inanOB-van),appropriate
precautions must be taken before and after operation (refer to Appendix
1).
  • Unobstructedairflowisessentialforproperoperation.Airventsofthe
unit are a functional part of the design and must not be blocked in any
way during operation (e.g. by objects placed upon them, placement of the
unit on a soft surface, or installation of the unit within a rack or piece of
furniture).
  • Theunitmustnotbeheatedupbyexternalsourcesofheatradiation(sun-
light, spotlights).
B3 Earthing and Power Supply
Earthing of units with mains supply (class I equipment) is performed via
theprotectiveearth(PE)conductorintegratedinthemainscable.Unitswith
battery operation (< 60 V, class III equipment) must be earthed separately.
Earthing the unit is one of the measures for protection against electrical shock
hazard (dangerous body currents). Hazardous voltage may not only be caused
by a defective power supply insulation, but may also be introduced by the
connected audio or control cables.
If the unit is installed with one or several external connections, its earthing
must be provided during operation as well as while the unit is not operated.
If the earthing connection can be interrupted, for example, by unplugging
the mains plug of an external power supply unit, an additional, permanent
earthing connection must be installed using the provided earth terminal.
Avoid ground loops (hum loops) by keeping the loop surface as small as
possible (by consequently guiding the earth conductors in a narrow, parallel
way), and reduce the noise current flowing through the loop by inserting an
additional impedance (common-mode choke).
Installation

V
Installation / EMC
ClassIEquipment(MainsOperation)
Should the equipment be delivered without a matching mains cable, the
latter has to be prepared by a trained person using the attached female plug
(IEC 320 / C13 or IEC 320 / C19) with respect to the applicable regulations
in your country.
  BeforeconnectingtheequipmenttotheACpoweroutlet,checkthatthelocal
line voltage matches the equipment rating (voltage, frequency) within the
admissible tolerance. The equipment fuses must be rated in accordance with
the specifications on the equipment.
Equipment supplied with a 3-pole appliance inlet (protection conforming to
class I equipment) must be connected to a 3-pole AC power outlet in such a
way that the equipment cabinet is connected to the protective earth.
For information on mains cable strain relief, please refer to Appendix 2.
Female Plugs (IEC320), Front-Side View:
PE
LN
IEC 320 / C19IEC 320 / C13
PE
LN
European Standard
(CENELEC)
North American Standard
(NAS)
Brown L (Live) Black
Blue N (Neutral) White
Green/Yellow PE (Protective Earth) Green (or Green/Yellow)
ClassIIIEquipment(BatteryOperationupto60VDC)
Equipment of this protection class must be earthed using the provided earth
terminal if one or more external signals are connected to the unit (see expla-
nation at the beginning of this paragraph).
B4 Electromagnetic Compatibility (EMC)
The unit conforms to the protection requirements relevant to electromagnetic
phenomena that are listed in guidelines 89/336/EC and FCC, part 15.
  • Theelectromagneticinterferencegeneratedbytheunitislimitedinsuch
a way that other equipment and systems can be operated normally.
  • Theunitisadequatelyprotectedagainstelectromagneticinterferenceso
that it can operate properly.
The unit has been tested and conforms to the EMC standards of the speci-
fied electromagnetic environment, as listed in the following declaration.
The limits of these standards ensure protection of the environment and cor-
responding noise immunity of the equipment with appropriate probability.
However, a professional installation and integration within the system are
imperative prerequisites for operation without EMC problems.
For this purpose, the following measures must be followed:
  • Installtheequipmentinaccordancewiththeoperatinginstructions.Use
the supplied accessories.
  • Inthesystemandinthevicinitywheretheequipmentisinstalled,useonly
components (systems, equipment) that also fulfill the EMC standards for
the given environment.

VI
  • Usea system grounding concept that satisfiesthesafetyrequirements
(class I equipment must be connected with a protective ground conduc-
tor) and that also takes into consideration the EMC requirements. When
deciding between radial, surface, or combined grounding, the advantages
and disadvantages should be carefully evaluated in each case.
  • Useshieldedcableswhereshieldingisspecified.Theconnectionofthe
shield to the corresponding connector terminal or housing should have a
large surface and be corrosion-proof. Please note that a cable shield con-
nected only single-ended can act as a transmitting or receiving antenna
within the corresponding frequency range.
  • Avoidgroundloopsorreducetheiradverseeffectsbykeepingtheloop
surface as small as possible, and reduce the noise current flowing through
the loop by inserting an additional impedance (e.g. common-mode choke).
  • Reduceelectrostaticdischarge(ESD)ofpersonsbyinstallinganappropri-
ate floor covering (e.g. a carpet with permanent electrostatic filaments) and
by keeping the relative humidity above 30%. Further measures (e.g. con-
ducting floor) are usually unnecessary and only effective if used together
with corresponding personal equipment.
  • Whenusingequipmentwithtouch-sensitiveoperatorcontrols,pleasetake
care that the surrounding building structure allows for sufficient capacitive
coupling of the operator. This coupling can be improved by an additional,
conducting surface in the operator’s area, connected to the equipment
housing (e.g. metal foil underneath the floor covering, carpet with conduc-
tive backing).
C Maintenance
All air vents and openings for operating elements (faders, rotary knobs) must
be checked on a regular basis, and cleaned in case of dust accumulation. For
cleaning, a soft paint-brush or a vacuum cleaner is recommended.
Cleaning the surfaces of the unit is performed with a soft, dry cloth or a soft
brush.
Persistent contamination can be treated with a cloth that is slightly humidified
with a mild cleaning solution, such as dishwashing detergent.
For cleaning display windows, commercially available computer/TV screen
cleanersaresuited.Useonlyaslightlydamp(neverwet)cloth.
Never use any solvents for cleaning the exterior of the unit! Liquids must
never be sprayed or poured on directly!
For equipment-specific maintenance information please refer to the corre-
sponding chapter in the operating and service manuals.
D Electrostatic Discharge during Maintenance and Repair
Caution:  Observethe precautionsforhandling devicessensitivetoelectrostatic
discharge!
Many semiconductor components are sensitive to electrostatic discharge
(ESD). The lifespan of assemblies containing such components can be dras-
tically reduced by improper handling during maintenance and repair. Please
observe the following rules when handling ESD sensitive components:
  • ESDsensitivecomponentsshouldonlybestoredandtransportedinthe
packing material specifically provided for this purpose.
EMC / Maintenance / ESD

VII
ESD / Repair
  • Whenperformingarepairbyreplacingcompleteassemblies,theremoved
assembly must be sent back to the supplier in the same packing material
in which the replacement assembly was shipped. If this should not be the
case, any claim for a possible refund will be null and void.
  • UnpackedESD sensitive componentsshouldonly be handled inESD
protected areas (EPA, e.g. area for field service, repair or service bench)
and only be touched by persons wearing a wristlet connected to the
ground potential of the repair or service bench by a series resistor. The
equipment to be repaired or serviced as well as all tools and electrically
semi-conducting work, storage, and floor mats should also be connected
to this ground potential.
  • TheterminalsofESDsensitivecomponentsmustnotcomeinuncontrolled
contact with electrostatically chargeable or metallic surfaces (voltage
puncture, discharge shock hazard).
  • Topreventthecomponentsfromundefinedtransientstressandpossible
damage due to inadmissible voltages or compensation currents, electrical
connections should only be established or separated when the equipment
is switched off and after any capacitor charges have decayed.
E Repair
  Byremovinghousingpartsorshields,energizedpartsmaybeexposed.For
this reason the following precautions must be observed:
  • Maintenancemayonlybeperformedbytrainedpersonnelinaccordance
with the applicable regulations.
  • TheequipmentmustbeswitchedoffanddisconnectedfromtheACpower
outlet before any housing parts are removed.
  • Eveniftheequipmentisdisconnectedfromthepoweroutlet,partswith
hazardous charges (e.g. capacitors, picture tubes) must not be touched until
they have been properly discharged. Do not touch hot components (power
semiconductors, heat sinks, etc.) before they have cooled off.
  • Ifmaintenanceisperformedonaunitthatisopenedwhilebeingswitched
on, no un-insulated circuit components and metallic semiconductor hous-
ings must be touched, neither with bare hands nor with un-insulated tools.
Certain components pose additional hazards:
  • Explosionhazardfromlithiumbatteries,electrolyticcapacitorsandpower
semiconductors (Observe the component’s polarity. Do not short battery
terminals. Replace batteries only by the same type).
  • Implosionhazardfromevacuateddisplayunits.
  • Radiationhazardfromlaserunits(non-ionizing),picturetubes(ionizing).
  • Causticeffectofdisplayunits(LCD)andcomponentscontainingliquid
electrolyte.
Such components should only be handled by trained personnel who are prop-
erly protected (e.g. protection glasses, gloves).

VIII
E1 SMD Components
Studer has no commercially available SMD components in stock for service
purposes. For repair, the corresponding devices have to be purchased locally.
The specifications of special components can be found in the service manual.
SMD components should only be replaced by skilled specialists using appro-
priate tools. No warranty claims will be accepted for circuit boards that have
been damaged. Proper and improper SMD soldering joints are illustrated
below.
Dismounting
Mounting Examples
Solder
SMD
Component
Copper
Track
Adhesive
Soldering Iron
Desoldering
Iron
Desolder
Wick
Heat and Remove Cleaning
Solder
Ø 0.5...0.8 mm
Heating Time < 3 s per Side
Soldering
Iron Desolder
Wick
PCB
3
2
1
3
2
1
F Disposal
PackingMaterials The packing materials have been selected with environmental and disposal
issues in mind. All packing material can be recycled. Recycling packing saves
raw materials and reduces the volume of waste.
If you need to dispose of the transport packing materials, please try to use
recyclable means.
UsedEquipment Usedequipmentcontainsvaluablerawmaterialsaswellasmaterialsthat
must be disposed of professionally. Please return your used equipment via an
authorized specialist dealer or via the public waste disposal system, ensuring
any material that can be recycled is.
Please take care that your used equipment cannot be abused. To avoid abuse,
delete sensitive data from any data storage media. After having disconnected
your used equipment from the mains supply, make sure that the mains con-
nector and the mains cable are made useless.
Repair / Disposal

IX
G Declarations of Conformity
G1 Class A Equipment - FCC Notice
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 a reasonable protection against harmful interfer-
ence when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference, in which case the
user will be required to correct the interference at his own expense.
This Class A digital apparatus meets the requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe A respecte toutes les exigences du Règle-
ment sur le matériel brouilleur du Canada.
Caution: Any changes or modifications not expressly approved by the manufacturer
could void the user’s authority to operate the equipment. Also refer to relevant
information in this manual.
G2 CE Declaration of Conformity
We,
  StuderProfessionalAudioGmbH,
  CH-8105Regensdorf,
declare under our sole responsibility that the product
  StuderD21m,DigitalI/OSystem
  (fromserialno.0001)
  towhichthisdeclarationrelates,accordingtofollowingregulationsofEU
directives and amendments
  • LowVoltage(LVD):
73/23/EEC + 93/68/EEC
  • ElectromagneticCompatibility(EMC):
89/336/EEC + 92/31/EEC + 93/68/EEC
is in conformity with the following standards or normative documents:
  • Safety:
EN 60950-1:2000 (Class I equipment)
  • Safetyoflaserproducts:
EN 60825-1:2004 + A11 + A2, EN60825-2:2000
  • EMC:
EN 55103-1/-2:1996, electromagnetic environments E2 and E4.
Regensdorf, November 12, 2004
  B.Hochstrasser,PresidentM.Lienert,ManagerR&D
Conformity

X
Appendix 1: Air Temperature and Humidity
General
Normal operation of the unit or system is warranted under the ambient condi-
tions defined by EN 60721-3-3, set IE32, value 3K3.
This standard consists of an extensive catalogue of parameters, the most
important of which are: ambient temperature +5...+40 °C, relative humidity
5...85% (i.e., no formation of condensation or ice); absolute humidity 1...25 g/
m³; rate of temperature change < 0.5 °C/min. These parameters are dealt with
in the following paragraphs.
  Undertheseconditionstheunitorsystemstartsandworkswithoutanyprob-
lem.Beyondthesespecifications,possibleproblemsaredescribedbelow.
Ambient Temperature
  UnitsandsystemsbyStuderaregenerallydesignedforanambienttempera-
ture range (i.e. temperature of the incoming air) of +5 °C to +40 °C. When
rack mounting the units, the intended air flow and herewith adequate cooling
must be provided. The following facts must be considered:
  • Theadmissibleambienttemperaturerangeforoperationofthesemicon-
ductor components is 0 °C to +70 °C (commercial temperature range for
operation).
  • Theairflowthroughtheinstallationmustprovidethattheoutgoingairis
always cooler than 70 °C.
  • Averageheatincreaseofthecoolingairshallbeabout20K,allowingfor
anadditionalmaximum10Kincreaseatthehotcomponents.
  • Inordertodissipate1kWwiththisadmissibleaverageheatincrease,an
air flow of 2.65 m³/min is required.
Example: A rack dissipating P = 800 W requires an air flow of 0.8 * 2.65 m³/min which
corresponds to 2.12 m³/min.
  • Ifthecoolingfunctionoftheinstallationmustbemonitored(e.g.forfan
failure or illumination with spot lamps), the outgoing air temperature must
be measured directly above the modules at several places within the rack.
The trigger temperature of the sensors should be 65 °C to 70 °C.
Frost and Dew
The unsealed system parts (connector areas and semiconductor pins) allow
for a minute formation of ice or frost. However, formation of dew visible to
the naked eye will already lead to malfunctions. In practice, reliable opera-
tion can be expected in a temperature range above –15 °C, if the following
general rule is considered for putting the cold system into operation:
If the air within the system is cooled down, the relative humidity rises. If it
reaches 100%, condensation will arise, usually in the boundary layer between
the air and a cooler surface, together with formation of ice or dew at sensi-
tive areas of the system (contacts, IC pins, etc.). Once internal condensation
occurs, trouble-free operation cannot be guaranteed, independent of tempera-
ture.
  Beforeputtingintooperation,thesystemmustbecheckedforinternalfor-
mation of condensation or ice. Only with a minute formation of ice, direct
Appendix

XI
evaporation (sublimation) may be expected; otherwise the system must be
heated and dried while switched off.
A system without visible internal formation of ice or condensation should be
heated up with its own heat dissipation, as homogeneously (and subsequently
as slow) as possible; the ambient temperature should then always be lower
than the one of the outgoing air.
If it is absolutely necessary to operate the cold system immediately within
warm ambient air, this air must be dehydrated. In such a case, the absolute
humidity must be so low that the relative humidity, related to the coldest
system surface, always remains below 100%.
Ensure that the enclosed air is as dry as possible when powering off (i.e. before
switching off in winter, aerate the room with cold, dry air, and remove humid
objects such as clothes from the room).
These relationships are visible from the following climatogram. For a con-
trolled procedure, thermometer and hygrometer as well as a thermometer
within the system will be required.
Example1: AnOB-vanhavinganinternaltemperatureof+20 °C and a relative humidity
of 40% is switched off in the evening. If the temperature falls below +5 °C,
the relative humidity will rise to 100% (7 g/m³); dew or ice will be forming.
Example2: AnOB-vanisheatedupinthemorningwithairof+20 °C and a relative
humidity of 40%. On all parts being cooler than +5 °C, dew or ice will be
forming.
Appendix

XII
Appendix 2: Mains Connector Strain Relief
For anchoring connectors without a mechanical lock (e.g. IEC mains connec-
tors), we recommend the following arrangement:
Procedure: The cable clamp shipped with your unit is auto-adhesive. For mounting please
follow the rules below:
  • Thesurfacetobeadheredtomustbeclean,dry,andfreefromgrease,oil,
or other contaminants. Recommended application temperature range is
+20 °C to +40 °C.
  • Removetheplasticprotectivebackingfromtherearsideoftheclampand
apply it firmly to the surface at the desired position. Allow as much time as
possible for curing. The bond continues to develop for as long as 24 hours.
  • Forimprovedstability,theclampshouldbefixedwithascrew.Forthis
purpose, a self-tapping screw and an M4 bolt and nut are included.
  • Placethecableintotheclampasshownintheillustrationaboveandfirmly
press down the internal top cover until the cable is fixed.
Appendix

XIII
Appendix
Appendix 3: Software License
Use of the software is subject to the Studer Professional Audio Software
License Agreement set forth below. Using the software indicates your accep-
tance of this license agreement. If you do not accept these license terms, you
are not authorized to use this software.
  UndertheconditionandwithinthescopeofthefollowingTermsandCon-
ditions, Studer Professional Audio GmbH (hereinafter ‘Studer’) grants the
right to use programs developed by Studer as well as those of third parties
which have been installed by Studer on or within its products. References
to the license programs shall be references to the newest release of a license
program installed at the Customer’s site.
Programs Covered by the Agreement
LicenseProgramsofStuder The following Terms and Conditions grant the right to use all programs of
Studer that are part of the System and/or its options at the time of its delivery
to the Customer, as well as the installation software on the original data disk
and the accompanying documentation (‘License Material’). In thisAgreement
the word ‘Programs’ shall have the meaning of programs and data written in
machine code.
  Usingthesoftwareindicatesyouracceptanceofthislicenseagreement.Ifyou
do not accept these license terms, you are not authorized to use this software.
ProgramsofThirdParties Programs of third parties are all programs which constitute part of the System
and/or its options at the time of delivery to the Customer but have not been
developed by Studer. The following conditions are applicable to programs of
third parties:
  • Therighttousethirdparties’programsisgovernedbytheLicenseAgree-
ment attached hereto (if applicable), which is an integral part of this
Agreement. The Customer shall sign any and all License Agreements for
all further programs of third parties installed on the system. The Customer
shall be deemed to have received all License Agreements upon delivery
of the system and/or its options.
  • Studershallacceptnoresponsibilityorliabilityfor,andgivesnowarran-
ties (express or implied) as to the programs of third parties. The Customer
waives any and all claims versus Studer for any consequential damages,
which might occur due to defects of these programs.
Right of Use
Principle Studer grants the Customer the non-exclusive right to use the License Ma-
terial in one copy on the system and/or its options as laid down by the Sales
Agreement concluded between the parties and all Terms and Conditions
which shall be deemed to form and be read and construed as part of the Sales
Agreement. This right is assignable according to the ‘Assignability’paragraph
hereinafter.
CustomizedConfigurations The Customer is not entitled to alter or develop further the License Material
except within the expressly permitted configuration possibilities given by the
software installed on the system or elsewhere. All altered programs, includ-
ing but not limited to the products altered within the permitted configuration
possibilities, are covered by this License Agreement.

XIV
ReverseEngineering Reverse engineering is only permitted with the express consent of Studer.
The consent of Studer can be obtained but is not limited to the case in which
the interface software can not be provided by Studer. In any case Studer has
to be informed immediately upon complete or partial reverse engineering.
CopyingtheLicenseMaterial The Customer is entitled to make one copy of all or parts of the License
Material as is necessary for the use according to this Agreement, namely for
backup purposes. The Customer shall apply the copyright of Studer found on
the License Material onto all copies made by him. Records shall be kept by
the Customer regarding the amount of copies made and their place of keeping.
The responsibility for the original program and all copies made lies with the
Customer. Studer is entitled to check these records on first request. Copies
not needed anymore have to be destroyed immediately.
DisclosureofLicenseMaterial The License Material is a business secret of Studer. The Customer shall not
hand out or in any way give access to parts of or the complete License Material
to third parties nor to publish any part of the License Material without prior
written consent of Studer. The Customer shall protect the License Material
and any copies made according to the paragraph above by appropriate defense
measures against unauthorized access. This obligation of non-disclosure is a
perpetual obligation.
Third parties are entitled to have access to the License Material if they use the
License Material at the Customer’s site in compliance with this Agreement.
  Undernocircumstancearethirdpartiesentitledtohaveaccesstotheinstal-
lation software on the original data media. The Customer shall safeguard the
original data media accordingly.
Assignability The rights granted to the Customer according to this License Agreement shall
only be assignable to a third party together with the transfer of the system
and/or its options and after the prior written consent of Studer.
Rights to License Material
With the exception of the right of use granted by this License Agreement all
proprietary rights to the License Material, especially the ownership and the
intellectual property rights (such as but not limited to patents and copyright)
remain with Studer even if alterations, customized changes or amendments
have been made to the License Material.
Studer’s proprietary rights are acknowledged by the Customer. The Customer
shall undertake no infringements and make no claims of any patent, registered
design, copyright, trade mark or trade name, or other intellectual property
right.
Warranty, Disclaimer, and Liability
For all issues not covered herewithin, refer to the ‘General Terms and Condi-
tions of Sales and Delivery’ being part of the sales contract.
Appendix

Date printed: 24.01.12 1
D21m System
CONTENTS
1 General ................................................................................................................................................................................ 3
1.1 Utilization for the Purpose Intended .............................................................................................................................. 3
1.2 First Steps....................................................................................................................................................................... 3
1.2.1 Unpacking and Inspection ..............................................................................................................................................3
1.2.2 Installation ......................................................................................................................................................................3
1.2.3 Adjustments, Repair, Cleaning .......................................................................................................................................4
2 Introduction ........................................................................................................................................................................ 5
2.1 System Philosophy......................................................................................................................................................... 5
2.2 The Frame and Its Cards ................................................................................................................................................ 6
2.3 Hub Frame...................................................................................................................................................................... 7
2.4 Remote I/O Frame.......................................................................................................................................................... 7
2.5 Vista Surveyor Software ................................................................................................................................................ 7
3 Applications......................................................................................................................................................................... 9
3.1 Local I/O Only (Located Close to Core)........................................................................................................................ 9
3.2 One I/O Box within Long Distance ............................................................................................................................... 9
3.3 Multiple I/O Boxes, Long Distance ............................................................................................................................. 10
3.4 Multiple Hubs, Multiple I/O Boxes, Long Distance.................................................................................................... 11
3.5 Shared I/O .................................................................................................................................................................... 12
4 System Examples .............................................................................................................................................................. 13
4.1 System with Remote and Local I/O ............................................................................................................................. 13
4.2 System with Remote MIDI Connection....................................................................................................................... 14
5 Additional Information .................................................................................................................................................... 15
5.1 Mapping of I/O Cards to MADI and HD Link Channels............................................................................................. 15
5.2 Special Case: Microphone/Line Input Card................................................................................................................. 16
5.3 Analog Insert Cards...................................................................................................................................................... 16
5.4 96 kHz Operation ......................................................................................................................................................... 17
5.5 Input/Output Delays..................................................................................................................................................... 18
5.5.1 Additional SRC Delay ..................................................................................................................................................19
5.5.2 Additional Processing Delay ........................................................................................................................................19
5.6 The MADI Interface: 64 or 56 Channels?.................................................................................................................... 19
5.7 Standalone D21m I/O System...................................................................................................................................... 20
5.8 Connection to the Performa Core................................................................................................................................. 22

Date printed: 24.01.12
2
D21m System
6 D21m Modules .................................................................................................................................................................. 23
6.1 Available Cards ............................................................................................................................................................ 23
6.2 Analog I/O Cards ......................................................................................................................................................... 24
6.2.1 Mic/Line In Card ......................................... A949.0427 ..............................................................................................24
6.2.2 Analog Insert Card....................................... A949.0428 ..............................................................................................26
6.2.3 HD Mic/Line In Card...................................A949.0447 ..............................................................................................28
6.2.4 Line In Card................................................. A949.0421 ..............................................................................................30
6.2.5 Line Out Card .............................................. A949.0420 ..............................................................................................32
6.3 Digital I/O Cards.......................................................................................................................................................... 34
6.3.1 AES/EBU M2 Cards.................................... A949.0454, A949.0455, A949.0456.......................................................34
6.3.2 MADI I/O Cards.......................................... A949.0430, A949.0431, A949.0433.......................................................38
6.3.3 ADAT I/O Cards .......................................... A949.0425, A949.0429...........................................................................42
6.3.4 TDIF I/O Card ............................................. A949.0426 ..............................................................................................44
6.3.5 3G SDI Input Card....................................... A949.0452 ..............................................................................................46
6.3.6 SDI I/O Card................................................ A949.0442 ..............................................................................................48
6.3.7 3G SDI I/O Card.......................................... A949.0451 ..............................................................................................50
6.3.8 Dolby®E/Digital Decoder Card...................A949.0443/.0444 ....................................................................................53
6.3.9 CobraNet®Card ........................................... A949.0445 ..............................................................................................58
6.3.10 Aviom A-Net®Card ..................................... A949.0446 ..............................................................................................60
6.3.11 EtherSound®Card.........................................................................................................................................................62
6.3.12 BCD DTMF / GLITS / BLITS / Minimixer Cards.......................................................................................................64
6.4 Non-Audio I/O Cards................................................................................................................................................... 68
6.4.1 GPIO Card ................................................... A949.0435 ..............................................................................................68
6.4.2 GPIO Card with Relay Outputs ................... A949.0436 ..............................................................................................70
6.5 HD Cards...................................................................................................................................................................... 72
6.5.1 HD Card S.................................................... A949.0412 ..............................................................................................72
6.5.2 HD RS422 Card........................................... A949.0415 ..............................................................................................74
6.5.3 MADI HD Cards..........................................A949.04113x, A949.04133x, A949.04143x ...........................................76
6.6 Serial/Merger Cards ..................................................................................................................................................... 80
6.6.1 Serial Card ................................................... A949.0437 ..............................................................................................80
6.6.2 Serial Merger Card ...................................... A949.0438 ..............................................................................................82
6.6.3 Serial RJ45 Card.......................................... A949.0439 ..............................................................................................84
6.6.4 Dual Merger Card........................................ A949.0440 ..............................................................................................86
6.7 Power Supply and Miscellaneous ................................................................................................................................ 88
6.7.1 Primary Power Supply................................. A949.0404 (earlier version: A949.0403)................................................88
6.7.2 LED/PSII PCB............................................. A949.0402 ..............................................................................................89
6.7.3 Air Deflector/Filter Unit.............................. A949.0599 ..............................................................................................90
6.7.4 Fan Unit ....................................................... A949.0597 ..............................................................................................90
6.7.5 Break-Out Boxes ..........................................................................................................................................................91
6.7.5.1 XLR Break-Out Box.........................................................................................................................................................91
6.7.5.2 AES/EBU on BNC Break-Out Box.......... A949.0586.....................................................................................................91
6.7.5.3 GPIO Break-Out Box ............................... A949.0588.....................................................................................................92
6.7.6 Cables ...........................................................................................................................................................................92
6.8 Discontinued Components ........................................................................................................................................... 94
6.8.1 HD Card ...................................................... A949.0410 ..............................................................................................94
6.8.2 MADI HD Cards..........................................A949.04112x, A949.04132x, A949.04142x ...........................................95
6.8.3 AES/EBU I/O Cards.................................... A949.0422, A949.0423, A949.0424.......................................................97
6.8.4 SDI Input Card............................................. A949.0441 ............................................................................................100

Date printed: 24.01.12 3
D21m System
1 GENERAL
1.1 Utilization for the Purpose Intended
The D21m system is intended for professional use.
It is presumed that the unit is operated only by trained personnel. Servicing
is reserved to skilled technicians.
The electrical connections may be connected only to the voltages and signals
designated in this manual.
1.2 First Steps
1.2.1 Unpacking and Inspection
Your new system is shipped in a special packing which protects the units
against mechanical shock during transit. Care should be exercised when
unpacking so that the surfaces do not get marred.
Check the condition of the equipment for signs of shipping damage. If there
should be any complaints you should immediately notify the forwarding
agent and your nearest Studer distributor.
Please retain the original packing material because it offers the best protection
in case your equipment ever needs to be transported.
1.2.2 Installation
Primary Voltage The power supply unit is auto-ranging; it can be used for mains voltages in
a range of 100 to 240 VAC, 50 to 60 Hz.
Power Connection The attached female IEC 320/C13 mains cable socket has to be connected
to an appropriate mains cable by a trained technician, respecting your local
regulations. Refer to the ‘Installation, Operation, and Waste Disposal’ chapter
at the beginning of this manual.
Earthing This equipment must be earthed, due to the mains input filter network being
connected to the mains earth.
Some consideration must be given to the earthing arrangement of the system,
at the center of which is the frame. The frame is earthed to the mains earth via
the power supply. Ground loops may occur where signal processing equip-
ment, patched to the frame, has its signal earth commoned to the equipment
chassis.
Temperature Regulations The unit must not be used in conditions of excessive heat or cold, near any
source of moisture, in excessively humid environments, or in positions where
it is likely to be subjected to vibration or dust. The ambient temperature range
for normal operation of the unit is +0 to +40 °C.
Under standard circumstances (open 19” frame) and an ambient tempera-
ture between 0 and +40 °C, the power dissipations listed below must not be
exceeded. Please note that these figures may change for special environments,
such as air-conditioned machine rooms, etc.
Closed Passive, 2 Vents Active, 1 Fan, 1 Vent
Rear Rear
Air
Air
Air
Air
RearFront Front Front
D21mD21m D21m

Date printed: 24.01.12
4
D21m System
Operating Mode Total Height Max. Power Dissipation
Closed 3 U 40 W
Passive, with 2 vents 5 U 80 W
Active, w. 1 fan unit, 1 vent 5 U 200 W
Card No. Card Name Power Dissipation (approx.)
Backplane with power supply 10 W
A949.0427 Mic/Line in card (transformerless) 11 W
A949.0428 Analog insert card 2 W
A949.0447 HD Mic/Line in card (transf.-balanced) 10 W
A949.0421 Line In card 7 W
A949.0420 Line out card 7 W
A949.0422 AES/EBU card 3.5 W
A949.0423 AES/EBU card with input SRC 4.5 W
A949.0424 AES/EBU card with input/output SRC 5.5 W
A949.0454 AES/EBU M2 card 3.7 W
A949.0455 AES/EBU M2 card with input SRC 4.5 W
A949.0456 AES/EBU M2 card with input/output SRC 5.4 W
A949.0430 MADI card, multi-mode fibre 4 W
A949.0431 MADI card, single-mode fibre 4 W
A949.0433 MADI card, twisted pair 4 W
A949.0425 ADAT I/O card 1.7 W
A949.0429 ADAT card, long-distance option 1.7 W
A949.0426 TDIF I/O card 1 W
A949.0452 3G SDI input card (16 channels) 4.5 W
A949.0442 SDI input/output card (8 channels) 4 W
A949.0451 3G SDI input/output card (16 channels) 4 W
A949.0443 Dolby®E/Digital decoder card, single 2.5 W
A949.0444 Dolby®E/Digital decoder card, dual 4 W
A949.0445 CobraNet®card 4.5 W
A949.0446 Aviom A-Net®card 2 W
A949.0435 GPIO card 3 W
A949.0436 GPIO card with relay outputs 2 W
A949.0412 HD card S 5 W
A949.0415 HD RS422 card 5 W
A949.0411 MADI HD card, multi-mode fibre 5.5 W
A949.0413 MADI HD card, single-mode fibre 5.5 W
A949.0414 MADI HD card, twisted pair 5.5 W
A949.0437 Serial card 0.2 W
A949.0438 Serial Merger card 0.6 W
A949.0439 Serial RJ45 card 0.2 W
A949.0440 Dual Merger card 1.2 W
- BCD DTMF/BLITS/GLITS/Minimixer card 0.5 W
- Ethersound card 3 W
1.2.3 Adjustments, Repair, Cleaning
Danger All internal adjustments as well as repair work on this product must be per-
formed by expert technicians!
Replacing the Supply Unit The primary fuse is located within the power supply module and cannot be
changed. In case of failure, the complete power supply unit must be replaced.
Please ask your nearest Studer representative.
Cleaning Do not use any liquids to clean the exterior of the unit. A soft, dry cloth or
brush will usually do.
For cleaning display windows, most of the commercially available window
or computer/TV screen cleaners are suited. Use only a slightly damp (never
wet) cloth. Never use any solvent!