Mutec iclock User manual

REDUNDANT MULTIPLE CLOCK SYNTHESIZER
AND VIDEO REFERENCE GENERATOR VERSION 2.23

SAFETY INSTRUCTIONS
General instructions
To reduce the risk of fire or electrical shock, do not expose this appliance to rain or moisture, direct
sunlight or excessive heat from sources such as radiators or spotlights. No user serviceable parts are in-
side. Repair and maintenance must be carried out by qualified personnel authorized by MUTEC GmbH!
The unit has been designed for operation in a standard domestic environment. Do NOT expose the unit
and its accessories to rain, moisture, direct sunlight or excessive heat produced by such heat sources as
radiators or spotlights! The free flow of air inside and around the unit must always be ensured.
Initial operation
Prior to the initial operation of the unit, the appliance, its accessories and packaging must be
inspected for any signs of physical damage that may have occurred during transit. If the unit has
been damaged mechanically or if liquids have been spilled inside the enclosure, the appliance may
not be connected to the mains or must be disconnected from the mains immediately! If the unit is
damaged, please do NOT return it to MUTEC GmbH, but notify your dealer and the shipping com-
pany immediately, otherwise claims for damage or replacement may not be granted.
If the device is left in a low-temperature environment for a long time and then is moved to a room-
temperature environment, condensation may occur on the inside and the exterior. To avoid short-
circuits and flashovers, be sure to wait one or two hours before putting the device into operation.
Power supply
The device contains a self-adapting wide-range power supply supporting the majority of global stan-
dard line voltages within a range of 90…250 V, with no need for making adjustments. Make sure that
your line-voltage source provides a supply voltage within the specified range. In addition, make sure
that the device is properly grounded via the local electric installation.
Please use the enclosed power cord (see packaging) to connect the unit to the mains. Switch the
unit off before you attempt to connect it to the mains. Connect the power cord to the unit, then
to a standard 3-pin mains outlet. To draw the power cord, never pull on the cable but on the mains
plug!
The unit must be grounded during operation!
For information on the power-inlet wiring, refer to the »Wiring of connectors« section in the
appendix. Disconnect the device from the mains when not using it for an extended period!
This symbol, an exclamation mark inside a triangle,
alerts you to important operating or safety instructions
in this manual.
This symbol, a flash of lightning inside a triangle, alerts
you to the presence of uninsulated dangerous voltage
inside the enclosure - voltage that may be sufficient to
constitute a risk of shock.
Declaration of Conformity
We herewith confirm that the product complies with the European
Commission’s standards on electromagnetic compatibility.
Interference emission: EN 55103-1:1996
Resistance to interference: EN 55103-2:1996
Presupposed as operation condition is that all clock outputs are con-
nected with high-quality and good shielded BNC 75ohms cable.
!
CAUTION
RISK OF
ELECTRICAL SHOCK!
!
WARRANTY REGULATIONS
§1 Warranty
MUTEC GmbH warrants the flawless performance of this product to the original buyer for a period of two (2) years from the date of purchase. If any failure occurs within
the specified warranty period that is caused by defects in material and/or workmanship, MUTEC GmbH shall either repair or replace the product free of charge within 90
days. The purchaser is not entitled to claim an inspection of the device free of charge during the warranty period. If the warranty claim proves to be justified, the product
will be returned freight prepaid by MUTEC GmbH within Germany. Outside Germany, the product will be returned with the additional international freight charges payable
by the customer. Warranty claims other than those indicated above are expressly excluded.
§2 Warranty transferability
This warranty is extended exclusively to the original buyer who bought the product from a MUTEC GmbH specialized dealer or distributor, and is not transferable to anyone
who may subsequently purchase this product. No other person (retail dealer, distributor, etc.) shall be entitled to give any warranty promise on behalf of MUTEC GmbH.
§3 Waranty regulations
The return of the completed registration card, or online registration on one of the websites specified below, is a condition of warranty. Failing to register the device before
returning it for repair will void the extended warranty.
The serial number on the returned device must match the one stated on the registration card or entered during online registration. Otherwise, the device will be
returned to the sender at the sender’s expense.
Any returned device must be accompanied by a detailed error description and a copy of the original sales receipt issued by a MUTEC dealer or distributor.
The device must be returned free of shipping expenses and in the original package, if possible; otherwise, the sender has to provide comparably protective packaging.
The sender is fully responsible for any damage or loss of the product when shipping it to MUTEC GmbH.
§4 Limitation of warranty
Damages caused by the following conditions are not covered by this warranty:
Damages caused by every kind of normal wear and tear (e.g. displays, LEDs, potentiometers, faders, switches, buttons, connecting elements, printed labels, cover
glasses, cover prints, and similar parts).
Functional failure of the product caused by improper installation (please observe CMOS components handling instructions!), neglect or misuse of
the product, e.g. failure to operate the unit in compliance with the instructions given in the user or service manuals.
Damage caused by any form of external mechanical impact or modification.
Damage caused by the user’s failure to connect and operate the unit in compliance with local safety regulations.
Damage caused by force majeure (fire, explosion, flood, lightning, war, vandalism, etc.).
Any consequential damages or defects in products from other manufacturers and any arising costs from impairment or loss of productions or any other forms of events.
Repairs carried out by personnel which is not authorized from MUTEC GmbH will void the warranty. Adaptations and modifications to the device made with regard to
national, technical, or safety regulations in a country or of the customer do not constitute a warranty claim and must be set with MUTEC GmbH in advance.
§5 Repairs
To obtain warranty service, the buyer must call or write to MUTEC GmbH before returning the unit. All inquiries must be accompanied by a description of the problem and
the original buyer’s invoice. Devices shipped to MUTEC GmbH for repair without prior notice will be returned to the sender at the sender’s expense. In case of a functional
failure please contact:
MUTEC Gesellschaft fuer Systementwicklung und Komponentenvertrieb mbH
Siekeweg 6/8 • 12309 Berlin • Germany • Fon 030-746880-0 • Fax [phone] • [e-mail] • www.MUTEC-net.com
MUTEC GmbH assumes no liability for any incorrect information given in this manual. Please note that
all software/hardware product names are registered trademarks of their respective owners. No part of
this manual may be reproduced, copied or converted to a machine-readable form or electronical media
without a written permission of MUTEC GmbH. We reserve the right to change or improve our products
without notice. ©MUTEC GmbH 2004 – 2013

CONTENT
INTRODUCTION
About this Manual . . . . . . . . . . . . . . . . . . . . . . . 7
General Function Description . . . . . . . . . . . . . . . . . 7
Differences between Software V2.10 and V2.11. . . . . . . 8
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Optional Products . . . . . . . . . . . . . . . . . . . . . . . 8
CONTROL ELEMENTS
iCLOCK Front Panel. . . . . . . . . . . . . . . . . . . . . . . 9
iCLOCK + iCLOCK dp Rear Panels . . . . . . . . . . . . . . . 9
INSTALLATION
Content of the Box . . . . . . . . . . . . . . . . . . . . . . . 11
Placing the Device . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring the Word Clock and Video Interfaces . . . . . . . . . 11
Wiring the AES/EBU and S/PDIF Interfaces . . . . . . . . . . 12
GENERAL OPERATION
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . 13
Selecting Menu Pages and setting Functions . . . . . . . . 14
MENUS AND FUNCTIONS
Main Menu Page . . . . . . . . . . . . . . . . . . . . . . . . 14
Selecting and activating Clock Sources . . . . . . . . . . . 16
Configuring the internal Video Reference Generator . . . . 18
Configuring the Word Clock Outputs . . . . . . . . . . . . . 20
Configuring the AES/EBU Outputs . . . . . . . . . . . . . . 21
Configuring the S/PDIF Outputs . . . . . . . . . . . . . . . . 23
Setting System Functions
(Pull Up/Pull Down, Varispeed, etc.) . . 25
Preset Management . . . . . . . . . . . . . . . . . . . . . . 29
iCLOCK TECHNOLOGY
Functional Principle. . . . . . . . . . . . . . . . . . . . . . . 33
SoftReLock . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Sequence Synchronization . . . . . . . . . . . . . . . . . . . 34
Cycle Synchronization . . . . . . . . . . . . . . . . . . . . . 34
iCLOCK EXTENSIONS
iC-ALARM up to V2.10 . . . . . . . . . . . . . . . . . . . . . 35
iC-ALARM/GPI from V2.11 or higher . . . . . . . . . . . . . 36
General Function Description . . . . . . . . . . . . . . . . . 36
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
APPENDIX
Synchronizable HD tri-level Standards and Frame Rates. . . 37
Synchronizable and generatable Clock Rates. . . . . . . . . 37
Pin Assignment of the Connectors . . . . . . . . . . . . . . 38
Connecting the universal Clock Inputs to Ground . . . . . . 39
Switching-off the Termination of the universal Clock Inputs 39
Splitting-up the Video Outputs for dual
Video Generator Operation . . . . . . . . . . . . . . . . . . 39
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . 40

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INTRODUCTION
Thank you very much for purchasing iCLOCK or iCLOCKdp, Redundant
Multiple Clock Synthesizer & Video Reference Generator, from MUTEC!
About this Manual
The whole manual is related to both versions in general, iCLOCK and
iCLOCK dp. The individual differences are mentioned in the according
sections and chapters.
The structure of this manual refers to the normal process of installing
iCLOCK in a standard audio/video studio environment. Thus the chapters
are ergonomically sorted to provide a fast set-up. Before first power-on we
recommend to read the chapters INTRODUCTION and BRIEF INSTRUCTIONS
to get to know the general functionality of iCLOCK and to reach a fast
system integration.
The following chapters OPERATION and iCLOCK TECHNOLOGY describe
individual functions which enable the adaption of iCLOCK to every studio
environment. The chapters APPLICATION EXAMPLE and APPENDIX include
descriptions of favorable studio set-ups as well as all technical information.
If there are any uncertainties when operating the units which can not be
cleared up by the content of this manual, please feel free to contact your
local dealer or MUTEC directly. All contact details are included in chapter
WARRANTY REGULATIONS located at the beginning of the manual.
General Function Description
iCLOCK is a synchronizable, high-precision clock generator which is
designed to be the reference in digital audio and video studios as well
as broadcast and television stations. Based on a totally new concept
of frequency generation, developed by MUTEC, the unit offers an
unchallanged flexibility for synchronization of different devices to one
house clock. On this occasion iCLOCK breaks traditional, unflexible forms
of chaining input and output signals and allows for the first time their
completely free combination and scaleability.
iCLOCK‘s philosophy is addressed to provide the highest possible failure
safety for all outgoing clock signals which is needed especially for
broadcast stations or centralized clock distribution systems. With regards
to this functionality up to 3 independent external references can be auto-
detected and locked in a user-defined sequence without any phase-jumps
or interruptions in the outgoing signals. This applies also to external
clock frequency changes, e.g. from 44.1kHz to 48.0kHz or reference clock
changes, e.g. from video to GPS or AES11. Even if all external references
are lost, iCLOCK synthesizes the outgoing clock signals based on the
last incoming frequency constantly. If the absent reference clock returns
the synthesizer will lock gradually again based on iCLOCK’s SoftReLock
functionality which ensures interruption-free adjustments of all outgoing
clock signals. In this case a continous clock supply for all connected devices
is guaranteed during any operation mode.
For todays audio/video productions a precision synchronisation of the used
audio and video equipment is imperative. To reach the highest value of
accuracy the involved clock signals need to be synchronized and converted
without any phase drift. Therefore iCLOCK offers a unique, automatically
working signal management which observes the phase relationships of all
input and output signals and takes care of adjustments aligned to
AES11-1997/2003 and EBU R83-1996.
Using DDS-coupled frequency generation and latest DSP-based filtering
technologies in combination with an extremely low-jitter clock basis of
< 10ps (RMS), iCLOCK eliminates the jitter of incoming reference signals
completely. This ensures highest possible jitter attenuation for all outgoing
clock signals. As a result the synchronization of connected devices is much
more reliable and the sound quality of every AD/DA converter will be
increased significantly.
7
Boxes which contain a triangle
with an exclamation mark should
be read carefully! These include
additional information which are of major
importance for the functional descriptions in
the text column.
!
The grey boxes contain supplementary
information for the corresponding sections
in the text columns. The content of the
individual box refers to the description in
the text column beside the box.
Synchronizable references
HD tri-level syncs
SD bi-level syncs
Word Clock + Word Clock x 256 (so called
Super Clock for ProToolsTM systems)
DSD 64, DSD128 + DXD
AES3 + AES11
AES3 id + AES11 id
S/P-DIF
GPS
Telecom
DCF77
MSF60
Internal SD video reference generator
Further references through option cards
or custom designed-programming
Generatable references
SD bi-level as Black &Burst or
composite sync
Word Clock + Word Clock x 256 (so called
Super Clock for ProToolsTM systems)
DSD64, DSD128 + DXD
Film and video frame + field rates
AES11
S/P-DIF
GPS
Further clock signals through option cards

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INTRODUCTION
INTRODUCTION
INTRODUCTION
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Differences between Software V2.10 and V2.11
Both versions include the preset management as new functionality, which
was inquired by several professonal MUTEC customers (see page 28).
Using software V2.10 or V2.11 depends on the alarm interface you have
already installed or you plan to install. Software V2.10 supports only the
older interface iC-ALARM (ordering no. 8005-056), whereas software
V2.11 supports only the new iC-ALARM/GPI (ordering no. 8005-066).
The iC-ALARM/GPI interface offers same basis functionality like the iC-
ALARM, but the new iC-ALARM/GPI interface allows for switching over the
different presets via its GPIO function (see page 31, 32).
Features
Synchronizable digital audio clock synthesizer with integrated
SD bi-level (PAL / NTSC) + Word Clock + AES11 + S/PDIF sync generators.
Locks nearly 20 different HD tri-level standards and frame rates
Converts HD tri-level syncs into SD bi-level syncs
High-accurate reference generation with an accuracy of < 0.1ppm.
Lowest jitter clock base with < 10ps (RMS).
Redundant (fail-safe) operation.
DDS-based jitter elimination of incoming reference signals.
Synchronizable SD bi-level, AES11 and S/PDIF generators.
Synchronization and generation of 36 Word Clock rates.
Generation of different PAL and NTSC pilot tones.
Synchronization and generation of all AES3/-11 and S/PDIF clock rates
up to 192.0kHz.
DSD64, DSD128 + DXD clock rates standardly supported.
High-accurate GPS or Atomic Clock references, like 10.0MHz and others,
are synchronizable, distributable and generatable.
No limitation of input assignment at the universal inputs.
SoftReLock functionality for recurring reference signals.
CYCLESYNC functionality for automatically re-synchronization.
Drop out compensation of incoming reference signals.
Generation of multiple clock rates at the same time.
Free scalability of all output clock signals.
Automatic signal management aligned to AES11 and EBU R83.
Digital varispeed up to ± 20%.
Supports all pull up/pull down rates for film, audio and video transfers.
Follows external references up to ±20% (reducible).
Programming of additional clock rates between 1.0Hz– 25.0MHz.
Programming of additional lock ranges between 1.0kHz– 30.0MHz.
Eeasy and convenient operation through large display.
Soft and hardware upgradeability and recalibratability.
Applications
Audio and HD/SD video synchronization
Jitter attenuation in clock signals
Centralized + redundant A/V clock distribution
Conversion between HD tri-level syncs, SD bi-level syncs, Word Clock,
DSD, DXD, AES3/-11, AES3-/11id, S/PDIF, GPS, Telecom, DCF77, MFS60
and optional standards
Synchronization, distribution and generation of high-accurate
GPS or Atomic Clock references
Failure securing in clock distribution systems
Film, video and audio transfers
Synchronization of pilot tone resolvers, timecode generators,
film projectors
Coupling of HD/SD based multi-format video systems
Optional Products
iCLOCK dp iCLOCK basis unit with two redundant power supplies
P/NVSG-02 Second, synchronizable SD bi-level video sync generator
iC-ALARM Relais-coupled alarm signal interface
iC-ALARM/GPI Relais-coupled alarm signal and GPIO interface
iC-WCO-4 4 x Word Clock output expansion
iC-PROG Programming of additional clock rates and lock ranges
iC-CAL0.1 Re-calibration of internal reference oscillator to < 0.1ppm
8

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CONTROL ELEMENTS
iCLOCK + iCLOCK dp Front Panel
1DISPLAY
All parameter and function settings are controlled using the display and
the four cursor buttons.
2 + 3 STATUS Indicators
The three blue indicators show the lock status of the currently active clock
source. The five red indicators show important system statuses of iCLOCK.
4CURSOR Buttons
All parameter and function settings are controlled using the four cursor
buttons and the display.
iCLOCK Rear Panel
1 + 2 INPUT1, INPUT2
These universal input terminals allow for applying various external clock
signals for synchronizing the internal clock synthesizer. All clock formats
supported by the system can be received at any of these inputs. These two
inputs and INPUT 3 can be synchronized by the synthesizer in a freely confi-
gurable sequence. The impedance of each input is 75 Ωand can be switched
off internally for chaining devices, see the »Switching-off the Termination
of the universal Clock Inputs« section in the appendix.
3ALARM OUT
The iC-ALARM output is optionally available (item no. 8005-065). Refer to
the EXTENSIONS chapter for a short overview.
4INPUT3 (AES/EBU)
A balanced digital AES/EBU signal can be applied to this input for synchro-
nizing the internal clock synthesizer. The signal must comply with
AES3 – 1992 (R1997) or AES11 – 1997.
Both input terminals are isolated from
ground to avoid interference from the
connected clock line. This applies to all clock
references except video! Is a video signal
selected as reference the corresponding
input will be connected to ground automa-
tically.
If this does not comply with the electrical
studio purposes, the ground connections of
both inputs could be linked permanently by
setting jumpers on the mainboard. Refer to
the »Connecting the universal Clock Inputs
to Ground« section in the appendix for a
short instruction.
Refer to the OPERATIONS chapter for more
information.
9
iCLOCK and iCLOCK dp front panels look equal
iCLOCK dp Rear Panel
4321
81 2
3
4 5 6 7 9 10 11 12 13
14

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CONTROL ELEMENTS
CONTROL ELEMENTS
CONTROL ELEMENTS
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5PAL/NTSC VIDEO OUT
SD bi-level PAL and NTSC composite video sync signals are sent from these
outputs. After installing the optional P/NVSG-02 video sync generator (item
no. 8010-010), a separate video format can be assigned to each output pair.
Associated output pairs are arranged on top of each other.
If a HD tri-level sync signal is applied to a reference input, the incoming
reference can be distributed through the PAL/NTSC video outputs.
The individual BNC terminals of an output pair are marked as A and B; this
allows, for example, for a simple documentation of the connected devices.
6WORD CLOCK OUT
These outputs send Word Clock, Word Clock x 256 signals and film / video
frame/ field clock rates. Each of the output pairs can be assigned with a sepa-
rate clock rate. Associated output pairs are arranged on top of each other.
The individual BNC terminals of an output pair are marked as A and B; this
allows, for example, for a simple documentation of the connected devices.
7 + 8 AES/EBU OUT1, AES/EBU OUT2
These outputs send a balanced digital AES/EBU audio or blank frame signal
compliant with AES3 – 1992 (R1997) and AES11 – 1997. Each of the output
pairs can be assigned with a separate clock rate, and the channel status bits
can be edited individually. The rear-panel outputs are marked as AES OUT 1
and AES OUT 2, the individual output terminals as »A« and »B«; this allows,
for example, for a simple documentation of the connected devices.
9S/P-DIF OUT
These outputs send an unbalanced digital S/P-DIF audio or blank frame
signal compliant with IEC 60958. The channel status bits can be edited. The
individual output terminals are marked as A and B; this allows, for example,
for a simple documentation of the connected devices.
10 RS 485
This interface port is provided for programming the iCLOCK and updating
the device firmware. A software for remotely controlling the device over
LANs (Local-Area Networks) will be available in the future.
11 OPTION
This slot is provided for installing optional iCLOCK terminals. Refer to the
iCLOCK EXTENSIONS chapter for a short description of extensions available
currently or in the future.
12 MAINS IN 90 –260V, Power Switch
This is the main switch for switching the device on and off. Be sure to
make all connections (especially the supplied power cable) properly before
turning on the switch. Heed the SAFETY INSTRUCTIONS at the beginning of
this manual.
13 MAINS IN 90 –260V, Power Inlet
Connect the supplied power cable here. Make sure that the power switch
is turned off before connecting the power cable to this inlet and to the
power outlet. Line voltages within the range of 90…260 V with a frequency
of 50 or 60 Hz can be applied. The internal power supply will automatically
make all necessary adjustments.
14 iCLOCK dp MAINS IN 90– 260V, Power Inlets
Connect the supplied power cables here. It does not matter which power
inlet is used when only one power cable will be connected. In general ope-
ration two power cables containing mains voltage can be connected simul-
taneously. Line voltages within the range of 90…260 V with a frequency of
50 or 60 Hz can be applied. The internal power supplies will automatically
make all necessary adjustments.
iCLOCK dp does not consist of a power switch!
10
Refer to the »Synchronizable and gene-
ratable Clock Rates« section in the APPENDIX
for a full list of all Word Clock, AES/EBU and
S/P-DIF clock rates that can be generated.
For detailed specifications on all terminals,
refer to the »Pin assignment of the
Connectors« and »Technical Data« sections
in the APPENDIX.

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11
INSTALLATION
Content of the Box
The unit was packed carefully. Nevertheless we recommend to check the
content directly after opening the package:
1 x iCLOCK /iCLOCKdp
1 x Power cable, 2 x power cables for iCLOCK dp
4 x Rubber feet
1 x Manual
1 x Registration card
Placing the Device
The unit should be set up as closely as possible to the devices to which it
will be connected, so as to avoid excessive cable lengths. Use the 4 rubber
feets enclosed with the appliance and stick them symmetrically on the
bottom side of the unit to protect the enclosure and supporting surface
from being damaged.
The device can be mounted into a standard 19“ rack and will require 1
unit. In this case, the rubber feet cannot be attached. Install the device so
that one unit of rack space is left free both above and below the device to
allow for sufficient ventilation! The mounting depth including the termi-
nals is 240 mm/9.45“ for iCLOCK and 280mm/11.02 for iCLOCK dp. Another
60 mm/2.4“ should be added for the required cables.
Additional slide-in rails on the rack inside are recommended for safe instal-
lation. This will also avoid long-term mechanical deformation of the housing.
Wiring the Word Clock and Video Interfaces
To allow for synchronization of signals, the interfaces of all devices involved
must be properly connected to each other, so as to ensure a logical signal
flow. Always be sure to connect the Word Clock outputs of iCLOCK to the
according inputs of the devices you wish to synchronize! Cable lengths should
be kept as short as possible to minimize signal losses and/or interference!
For the transmission of Word Clock or video signals electrical, asymmetrical
cables with a resistance of 75Ωand BNC connectors on both ends are used.
Typically, such cables are marked »RG-59U, RG59B/U«.
Additionally, you should make sure that the Word Clock or video inputs to
be connected to iCLOCK’s outputs have a 75 Ω terminating resistor! Most
Word Clock or video inputs allow for enabling/disabling the termination
with a so-called »termination-switch«, which may be located on the outside
or inside of the device.
For devices which have no termination of the Word Clock input, e.g. RME
Hammerfall with Word Clock i/o or Alesis BRC, you can use an additional
BNC-T piece to terminate the input. Plug the T piece with its center connec-
tor into the input of the receiving device. Then, connect the cable coming
from iCLOCK to one of the lateral connectors, and the other connector of
the BNC-T piece to a 75Ω resistor forming the BNC termination.
Basically, you should avoid »looping through« Word Clock leads by means
of passive BNC-T pieces to preserve the signal quality, as level drops will be
the result. If there is no other way to wire your set-up, please make sure
that all Word Clock inputs (except for the last device in the chain) have
their terminations disabled! In a serial Word Clock chain only the last clock
input should have a termination! Never connect more than three devices in
series to one output!
Clock Cable Lengths
It is imperative that the lengths of
all cables connected are largely the
same, as this is the only way to ensure that
all devices will be synchronized in phase
(exception: cable tolerances).
Please make sure that the cable used has a
resistance of 75 Ω , in compliance with the
specifications! If a cable with a different
resistance is used, a dramatic deterioration
of the signal quality can be the result! In
this case, the perfect synchronization of all
devices involved could be impaired.
!
We recommend using high-grade cables
with a good shielding for your clock signal
leads, in particular, if you need to transmit
Word Clockx 256 (so-called Super Clock)
signals over greater distances. In any case, a
length of max. 10 meters (approx. 30 feet)
should never be exceeded!
Before Powering Up
The condition of the packaging
material and the device should
be checked carefully additionally. If there
are any damages please refer to SAFETY
INSTRUCTIONS, Initial Operation, and
WARRANTY REGULATIONS.
Before installing the unit the section SAFETY
INSTRUCTIONS located at the beginning of
this manual should be read carefully.
Never expose the device and accessories to
rain, moisture, direct sunlight, or excessive
heat produced by radiators, heaters, or
spot lights! Sufficient air circulation in the
environment of the device must be ensured!
!

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INSTALLATION
INSTALLATION
INSTALLATION
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Wiring the AES/EBU and S/P-DIF interfaces
Connect the AES/EBU interfaces with the help of balanced electrical
cables equipped with XLR connectors on both ends. The specifications
stipulate a specific cable resistance of 110Ω (ask your retailer for a confir-
mation of this value when purchasing the cables).
Connect the coaxial S/P-DIF interface with the help of unbalanced electri-
cal cables equipped with cinch connectors on both ends. The specifications
stipulate a specific cable resistance of 75Ω(ask your retailer for a confirma-
tion of this value when purchasing the cables).
Cables for High Clock Rates
Especially when working with high
AES3/-11 clock rates well shielded
clock lines are imperative to avoid increased
radiation! Standard cables are nor-mally
useable for clock rates up to 50.0kHz. Special
shielded cable material should be used for
transfer of higher clock rates.
!
Since some manufacturers offer optimized
cables for the transmission of digital S/P-DIF
and AES3/-11 signals, it will be a good idea
to ask your retailer for specific cables.
12

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GENERAL OPERATION
Menu Structure
The entire menu structure is based on the logical flow of events when deploying the iCLOCK in a standard audio/video-studio
environment. Therefore, starting with the menu main page, the menu pages have an ergonomically structured sequence and can
thus be called successively by repeatedly pressing the up button.
Menu main page
GLOBAL LONEREF LOCKT I ME FREEZE
2 / 4 30SECs 5SECs GO
AES-S FREQ WORDL FORMAT DCSET
O U T 1 / 1 4 4 . 1 k 2 4 B I T s P R O F O F F
AES-S FREQ WORDL FORMAT DCSET
O U T 2 / 1 4 4 . 1 k 2 4 B I T s P R O F O F F
AES-S AUD I OSTAT REFSTAT LOCKSTAT
OUT1/ 2 NONAUD I O G1-REF LOCKED
AES-S AUD I OSTAT REFSTAT LOCKSTAT
OUT2/ 2 NONAUD I O G1-REF LOCKED
V I D E O R E F F O R M A T V I D E O - T Y P E
OUT1+2 I NTERN PAL BLACK + BURST
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S / PDI F FREQ WORDL FORMAT DCSET
O U T / 1 4 4 . 1 k 2 4 B I T s C O N S O F F
S / P D I F A U D I O S T A T R E F S T A T
OUT /2 NONAUD I O LEVEL 1
WCLK-S FREQ ( FORMAT ) LEVEL / TERM
O U T 1 4 4 . 1 k W O R D C L K 2 . 5 V / 7 5 R
WCLK-S FREQ ( FORMAT ) LEVEL / TERM
O U T 2 4 4 . 1 k W O R D C L K 2 . 5 V / 7 5 R
WCLK-S FREQ ( FORMAT ) LEVEL / TERM
O U T 3 4 4 . 1 k W O R D C L K 2 . 5 V / 7 5 R
WCLK-S FREQ ( FORMAT ) LEVEL / TERM
O U T 4 4 4 . 1 k W O R D C L K 2 . 5 V / 7 5 R
REF1-3 REF1 REF2 REF3 SYNC
I NTERN NO REF NO REF REF1
I NPUT REF1 STATUS OUTPUTs
I NTERN 25Hz LOCKED WCLK1 44 . 1k / W
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GLOBAL PULLs VAR I SPEED PULL RANGE
1 / 4 O F F + 0 . 0 0 0 0 % + / - 5 . 0 %
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REF 1– 3
Setting the clock
sources
VIDEO OUT 1+ 2
Setting the video-
generator functions
13
WORD CLOCK OUT 2
page 2
AES OUT1+ 2
Setting the AES/EBU-
generator functions
WORD CLOCK OUT 1
page 1
WORD CLOCK OUT 3
page 3
WORD CLOCK OUT 4
page 4
WCLK, OUT 1– 4
Setting the wordclock
functions
AES/EBU OUT 1
page 1
AES/EBU OUT 1
page 2
AES/EBU OUT 2
page 1
AES/EBU OUT 2
page 2
S/P-DIF OUT1
Setting the S/PDIF-
generator functions
GLOBAL ADJ WCLK ADJ AES / EBU D I SPLAY
3 / 4 S I N G L E S I N G L E O N
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GLOBAL LONEREF LOCKT I ME FREEZE RESET
2 / 4 30SECs 5SECs GO GO
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GLOBAL 1/ 4
Setting global system
functions
S/P-DIF OUT
page 1
S/P-DIF OUT
page 2
GLOBAL page 1
GLOBAL page 2
GLOBAL page 3
GLOBAL page4
VIDEO OUT 1+ 2
PRESET
PRESET
Preset management
GLOBAL TERM I N1 / I N2 POWER SUPPLY SOFT
4 / 4 O N O N 1 - O K 2 - N . A . V 2 1 1
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PRESET OPERAT I ON NAME NUMBER
GO LOAD PRESET01 01
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14
Selecting Menu Pages and setting Functions
The device is fully operated using the display and the four cursor buttons
on the front panel. All display screens have an identical operating structure:
1 Arrows on the left display side for simplifying navigation
2 Appropriate page name on the left display side next to the arrows
3 The upper display line shows the function name
4 The lower display line shows the associated adjustable parameter
The arrow orientations refer to the respective cursor buttons.
1 When the two vertical arrows are displayed as normal, pressing the up
and down buttons will move between the individual menu pages.
2 When an arrow pointing to the right is displayed, pressing the right
button (ENTER) will provide access to the adjustable parameter of the
individual functions. With every press of the button, the arrow moves
on to the next parameter of the next function.
Display operating structure
AES-S FREQ WORDL
FORMATDCSET
OUT1/144.1k 24BITs
PROF OFF
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1 Navigation Arrows
2 Page Name 3 Function Name
4 Parameter
3 During this procedure, the two vertical arrows will be inverted, meaning
that the up and down buttons are now used for changing parameter
values and not for moving between menu pages.
4 When the horizontal arrow has been positioned in front of the parameter to
be changed, pressing the up/down buttons will first change to the setting
mode (the arrow will change its shape). Subsequent pressing the ENTER
button will confirm the changes, the arrow will return to its original shape.
Pressing the ENTER key again will then move the arrow to the next parameter.
AES-S FREQ WORDL FORMATDCSET
OUT1/144.1k 24BITs PROF OFF
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AES-S FREQ WORDL FORMATDCSET
OUT1/144.1k 24BITs PROF OFF
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ENTER
1 2
Display arrow orientations
AES-S FREQ WORDL FORMATDCSET
OUT1/1>44.1k24BITsPROFOFF
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3 Inverted
Navigation
Arrows
4 Enter
setting
mode
Up/down buttons
change operation
modes and values
Setting modes and parameters
Safety Instructions
For safety reasons, be sure to
read the SAFETY INSTRUCTIONS
and INSTALLATION chapters before first
powering-up!
We also recommend reading the CONTROL
ELEMENTS chapter for information on how
to connect iCLOCK!
!
If no buttons are operated for approx.
30 seconds, the display will automatically
return to the menu main page.
Display pages not containing a horizontal
arrow are provided for function-status
indication only and cannot be edited.
Selecting different display pages during
operation will not affect the functionality of
iCLOCK. Even changing output function set-
tings will not impede the overall operation!
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15
Status Displays
When iCLOCK is running in INTERN
mode the first blue LED, LOCK REF 1,
will light and confirm the synchronization
of the synthesizer to the internal video
reference generator.
After first switching on, the synthesizer
needs approx. 30 seconds to achieve stable
synchronization. This depends on the time the
video reference generator needs for attuning
all components of its video output signal.
During this process the system re-locks
temporarily (the HOLD LED and the blue
LOCKED REF 1 LED are lightening alternately).
This has no relevance for system security.
The output clocks are constantly available.
!
INPUT REF1, -2, -3
INPUT REFERENCE, shows an abbreviation of the clock source currently se-
lected incl. its reference slot and its actual rate as a realtime measurement.
As display space is limited, the displayed value is automatically adapted
with regard to the decimal places and the frequency unit as follows:
Hz = hertz
k= kilohertz
M= megahertz
Refer to the »Selecting Clock Sources« section in this chapter for
information on individual sources.
STATUS (function)
Shows the current system status. STATUS provides information on the device
synchronization and possible system errors. Major functionalities are indica-
ted through eight LEDs on the right hand side of the display additionally.
LOCKED (status message)
LOCKED indicates that the system has synchronized to the internal video
reference generator or an externally applied clock signal. At the same time,
the blue LOCK indicator associated with the active clock input (INPUT 1 - 3)
will light.
FQ CHANGE (status message)
FREQUENCY CHANGE indicates that a sync source change is occurring. This
can be a change between two externally applied clock signals or an auto-
matically or manually performed change from an external to an internal
clock source (or vice versa). When the change occurs, the LOCK indicator
of the last clock source used will go dark, and the red HOLD indicator will
light. When the system has locked to the new source, the HOLD indicator
will go dark, and the associated LOCK indicator will light.
HOLD (status message)
HOLD indicates that an externally applied clock signal has either drifted
outside its permitted lock range (see the PULL RANGE parameter on the
GLOBAL 1/4 page) or is completely lost. In this case, the system waits for a
certain period for the signal to return before automatically changing to the
next clock source. This waiting period specified by the LONEREF parameter
on the GLOBAL 2/4 page.
CYCLESYNC (status message)
CYCLE SYNCHRONIZATION indicates that the system is currently perfor-
ming an automatic resynchronization. This function can be disabled on the
REF1–3 page or be enabled manually for individual clock source inputs.
i C L O C K - V 2 . 1 1
REDUNDANT MULT I PLE CLOCK SYNTHES I ZER
V I DEO REFERENCE GENERATOR
cMUTEC GmbH 2002-2008
I NPUT REF1 STATUS OUTPUTs
I NTERN 25Hz LOCKED WCLK1 44 . 1k / W
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Boot pages
All user-specific parameter settings
are available furthermore when
power is restored.
!
Menu main page
MENUS AND FUNCTIONS
Main Menu Page
When the device is switched on, a boot period of approximately seven
seconds will occur. During this period, the display will show two pages in
succession. The first of them provides information on the current firmware
version.
After the boot period, the menu main page will be displayed. This page is
always displayed during standard operation; in combination with the eight
front panel indicators, it provides information on the basic device status.

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16
REF 1, REF2, REF3 (function)
This function allows for selecting three clock sources supported by the sys-
tem and for assigning them to a clock source slot. The sources will synchro-
nize the system in their numeric sequence (REF1 →REF2 →REF3).
INTERN (setting)
INTERNAL Selecting the INTERN setting synchronizes the synthesizer to the
internal video reference generator that supplies all audio clock signals in
compliance with AES11 and EBU R83. As internal synchronization is the ulti-
mately selected source, no other sources will be left afterwards. Therefore,
when selecting INTERN for REF1, the REF2 and REF3 functions will auto-
matically be assigned with the »NO REF« setting.
REF1-3 REF1 REF2 REF3 SYNC
I NTERN NO REF NO REF REF1
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REF1-3 page
Error Messages
If one of the messages OSCI FAIL,
MAIN1LOST or MAIN2LOST is
displayed, safe operation is not guaranteed!
Contact the technician in charge
immediately!
!
Setting REF1 – 3
The most important clock source
in your studio environment should
always be assigned to REF1! This is critical
for proper completion of the CYCLE-SYNC
setting. Afterwards, the other REF slots
should be assigned with sources in a
hierarchical order.
!
OSCI FAIL (status message)
OSCILLATOR FAILED, indicates that the internal reference clock oscillator has
failed.
MAIN1LOST (status message)
MAIN 1 LOST indicates that the primary supply voltage or the primary in-
ternal power supply have failed. If this status message is indicated, contact
the technician in charge immediately! The message is displayed only if the
iCLOCK is equipped with a redundant power supply (iCLOCKdp version,
item no. 8015-046).
MAIN2LOST (status message)
MAIN 2 LOST indicates that the secondary supply voltage or the secondary
internal power supply have failed. If this status message is indicated, con-
tact the technician in charge immediately! The message is displayed only if
the iCLOCK is equipped with a redundant power supply (iCLOCKdp version,
item no. 8015-046).
OUTPUTs (function)
Here, the set clock rates of all outputs are displayed alternately as a
»ticker«. This allows for checking the settings directly with no need for
changing to the relevant menu pages.
The following clock signals or rates are factory defaults:
PAL/NTSC VIDEO OUT 1 + 2 = PAL Black + Burst
WORD CLOCK OUT 1 – 4 = 44,1kHz
AES3/-11 OUT 1+ 2 = 44,1kHz
S/P-DIF OUT = 44,1kHz
Selecting and activating Clock Sources
The REF1-3 page allows for selecting the clock source of the internal synthe-
sizer. The clock formats supported by iCLOCK are listed in the adjacent table.
The factory defaults are REF1 = INTERN, REF2 = NO REF, REF3 = NO REF.
If one of the synchronizable clock sources is selected, the respective signal
format is marked with an index (1 + 2) referring to the two universal clock-
source inputs INPUT 1 and INPUT 2. Thus, the input clock signals can be
routed freely to these two system inputs. The AES format, however, is an
exception as balanced AES/EBU signals can be received by INPUT 3 only.
When selecting clock sources, the system proceeds logically. For example,
if the PAL1 source (PAL video on INPUT 1) has been selected under REF1,
it will not be available anymore for REF2 and REF3. This means that only
sources with an index of »2«, »AES«, »INTERN«, and »NO REF« can be
configured. Likewise, a clock source programmed for REF2 will not be
available for REF3 anymore.
If a clock source is routed to one of the REF slots it has to be activated
for synthesizer synchronization. Therefore the last modified REF slot
is displayed in the SYNC function menu automatically. Moving the
cursor to this position and pressing the ENTER button will activate the
synchronization process to the new clock source immediately.
Activating Clock Sources
After selecting a new clock source
under REF1 –3, it is imperative to
move the cursor to the SYNC function and
to press ENTER for activating the selected
reference for synchronisation!
!

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When applying Word Clock, GPS, Telecom,
DCF77 or MFS60 sources, both pulse and sine
signals will be accepted which allows for
processing even heavily slurred signals.
New References
For special-purpose applications, the range
or number of the sync-clock references can
be extended by means of a software update.
Practically any frequency or frequency
range between 1.0 kHz and 30.0MHz can be
defined. The only precondition is that the
new clock source can be connected to and
processed by the BNC inputs (INPUT 1 and
INPUT 2) according to their specifications.
For more information or a proposal, send an
e-mail message to
[email protected]
You may also call us or send a fax:
Phone [phone]
Fax [phone]
If an option supporting new input clock
formats is installed, these will automatically
be implemented by the system and will be
available for selection on the REF1–3 page.
17
PAL 1, -2 (setting)
PAL1, -2 allows for synchronizing the internal video reference generator to
PAL or SECAM video signals with a frame rate of 25 fps, 625 lines, and a line
frequency of 15.625kHz.
NTSC 1, -2 (setting)
NTSC1, -2 allows for synchronizing the internal video reference generator to
NTSC video signals with a frame rate of 29.97fps, 525 lines, and a line frequen-
cy of 15.73425kHz, or 30fps, 525 lines, and a line frequency of 15.750kHz
(black/white). The two NTSC formats are distinguished automatically.
WCLK 1, -2 (setting)
The WLCK1, -2 setting allows for synchronizing the synthesizer to all audio-
related Word Clock rates within a range of 8.0…24.576MHz. The applied
clock rate is recognized automatically. Refer to the »Synchronizable and
generatable Clock Rates« section in the appendix for a full list of all clock
rates.
AES (setting)
AES allows for synchronizing the synthesizer to all audio-related AES3/-11
rates in a range of 32…192kHz. The applied clock rate is recognized auto-
matically. Both AES 3 or AES 11 compliant signals can be applied. In additi-
on, S/PDIF signals can be applied to this input and be used for synchroniza-
tion. Refer to the »Synchronizable and Generatable Clock Rates« section in
the appendix for a full list of all clock rates.
AESid 1, -2 (setting)
AESid1, -2 allows for synchronizing the synthesizer to all audio-related
AES3/-11 rates in a range of 32…192kHz. The applied clock rate is recog-
nized automatically. Both AES 3id or AES 11id compliant signals can be
applied. In addition, S/PDIF signals can be applied to this input and be used
for synchronization. Refer to the »Synchronizable and Generatable Clock
Rates« section in the appendix for a full list of all clock rates.
S/P-DIF1, -2 (setting)
S/P-DIF1, -2 allows for synchronizing the synthesizer to all audio-related
S/P-DIF rates in a range of 32…192kHz. The applied clock rate is recogni-
zed automatically. Both S/P-DIF audio or S/P-DIF blank frame signals can be
applied. Refer to the »Synchronizable and Generatable Clock Rates« section
in the appendix for a full list of all clock rates.
GPS 1, -2 (setting)
GPS1, -2 allows for synchronizing the synthesizer to all sources with
standard GPS rates (1.0MHz, 2.5MHz, 5.0MHz, and 10.0MHz). The actual
clock rate will be recognized automatically.
TELEC 1, -2 (setting)
TELECOM1, -2 allows for synchronizing the synthesizer to sources providing
the standard Telecom clock rates of 1.024MHz or 2.048MHz. The actual
clock rate will be recognized automatically.
DCF 77 1, -2 (setting)
DCF771, -2 allows for synchronizing the synthesizer to sources providing a
DCF77 clock rate (77.5kHz). This reference is transmitted from Mainflingen/
Germany with a range of approx. 2000kms.
MSF60 1, -2 (setting)
MSF601, -2 allows for synchronizing the synthesizer to sources providing a
MSF60 clock rate (60.0kHz). This reference is transmitted from Rugby /UK
with a range of approx. 1500kms. From April 1st, 2007, it will be transmit-
ted from Anthorn.
HD-P- 1, -2 (setting)
HD-P-1, -2 allows for synchronizing the synthesizer to HD tri-level sync
sources with frame rates of 24Hz, 25Hz, 30Hz, 50Hz, 60Hz.
HD-N- 1, -2 (setting)
HD-N-1, -2 allows for synchronizing the synthesizer to HD tri-level sync
sources with frame rates of 23.98Hz, 29.97Hz, 59.94Hz.
NO REF (setting)
Selecting the NO REF setting disables the respective clock-source slot. If, for
example, only two clock sources are connected to the device and REF1 and
REF2 are configured accordingly, assign the NO REF setting to the REF3 slot
in order to disable this slot for the automatic resynchronization function
(see also CYCLESYNC).
Displaying HD tri-level
References
When locking your iCLOCK or
iCLOCKdp to HD tri-level references, their
individual frame rates can not be displayed
correctly under »STATUS«, as it is the case
when locking SD bi-level references. This is
due to system reasons. But your iCLOCK will
be locked as it should be.
Refer to the »Synchronizable HD tri-level
Standards and Frame Rates« section in the
APPENDIX for a full list of all synchronizable
and convertable HD tri-level standards and
frame rates.
!

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CYCLESYNC is not available when
the LONEREF function is set to HOLD
(see GLOBAL 2/4 menu page).
!
As the synthesizer is capable of continuously
supplying the adjusted iCLOCK output
signals, even a manual clock source change
on an input (by replugging the clock lines) is
supported during operation!
It is not important whether the change occurs,
for example, from a PAL SD video signal to a
Word Clock or GPS signal. The set output clock
rates will not be altered; only the base rate
will gradually be updated to match the new
source using iCLOCK‘s SoftReLock functionality
(see chapter iCLOCK TECHNOLOGY).
Locking the internal Video
Reference Generator – 1
If PAL or NTSC SD video is selected
as external reference, the internal video
reference generator will be automa-tically
gen-locked by the reference source and
switches to the same video format! This gua-
ranties correct phase relationships between
the video source and iCLOCK‘s generated sync
signals. A video format conversion is only
possible using the optional video generator
P/NVSG-02 (Order no. 8010-010) additionally.
With synchronization to PAL or NTSC SD bi-
level video it is not possible to change the
clock reference (REF) of the internal video
reference generator!
!
If the optional second video generator is
installed, it is necessary to split up the video
output pairs between the two generators.
Therefore, two jumpers have to be removed
from their socktes on the mainboard, see the
»Splitting-up the Video Ouputs for dual
Video Generator Operation« section in the
APPENDIX.
V I D E O R E F F O R M A T V I D E O T Y P E
OUT1+2 I NTERN PAL BLACK + BURST
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VIDEO OUT 1 + 2 (page name)
VIDEO OUT 1
+2 indicates that the internal video reference generator sends
its signals to both PAL/NTSC VIDEO OUT 1 and 2. This means also that only
one video reference generator is installed.
If the optional second generator is installed, another menu page will auto-
matically be added for it. The page names will change accordingly:
VIDEO OUT 1 = internal video reference generator
VIDEO OUT 2 = optional video generator
REF (function)
REFERENCE This function allows for setting the clock source of the respec-
tive video generator and can also enable video signal routing. The factory
default is INTERN.
INTERN (setting)
INTERNAL links the video generator to the internal reference clock oscilla-
tor. An extraordinary feature of iCLOCK is that the synthesizer can be syn-
chronized to an external clock source independently of the simultaneously
enabled video generator. Therefore, only the audio-related clock signals
might be subject to any present clock source deviation while the video sig-
nals are output with the accuracy of the internal clock: In a way, the video
generator acts as »independent autonomous generator« within iCLOCK.
EXTERN (setting)
EXTERNAL This setting synchronizes the video reference generator to the cur-
rently selected external clock source. Any signal or phase relations between
the input clock signals and the selected video format will be recognized auto-
matically and be routed internally in compliance with AES11 and EBU R83.
SYNC (function)
SYNCHRONIZATION This function allows for manual or automatic synchro-
nization of the synthesizer to selected clock sources assigned to the REF1–3
slots.
SEQSYNC (setting)
SEQUENCE SYNCHRONIZATION This is the default setting when activating
the REF1–3 menu page. It indicates the standard reference synchronization
mode of iCLOCK.
REF 1, REF2, REF3 (setting)
If one of the REF1, REF2, or REF3 parameters is selected and confirmed by
pressing the ENTER button, the synthesizer will immediately synchronize
the clock source assigned to the corresponding REF slot. The output signals
are set or adapted to the new source within the period specified by the
LOCKTIME parameter (see GLOBAL 2/4 page).
CYCLESYNC (setting)
CYCLE SYNCHRONIZATION With this setting, the input circuit querys the three
inputs for clock source reestablishment by cycling from REF1 to REF2 to REF3
and to the internal video reference generator automatically until a source is
available. The system‘s priority is programmed to the first reference slot (REF1).
Refer to »Sequence Synchronization and Cycle Synchronization« section in the
iCLOCK TECHNOLOGY chapter for details about SEQSYNC and CYCLESYNC.
Configuring the internal Video Reference Generator
The settings of the internal video reference generator and the four video
outputs available with iCLOCK standard version are configured on this
page. Two output pairs comprising one top-row and one bottom-row BNC
output each are available on the rear panel. These are numbered as PAL/
NTSC VIDEO OUT 1 and 2.

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Locking the internal Video
Reference Generator – 2
When running the internal video
reference generator in EXTERNAL mode, the
external reference signal may not deviate
more than ±30ppm from its nominal clock
frequency! Do not try to lock the video
generator to pull up/down clock rates - its
video signal would be destroyed!
!
DIST does not provide redundancy for the
video outputs. If the external video reference
source fails, the video outputs will fail, too!
Locking the internal Video
Reference Generator – 3
When externally synchronizing the
video reference generator, the lock
and varispeed ranges of the synthe-
sizer will be reduced to ±30 ppm! Thus,
enabling the pull-up/down and varispeed
factors is not provided in this mode. If,
however, these settings are made, the video
generator will automatically enable internal
synchronization.
When locking the synthesizer to the
internal video reference generator or when
locking the video reference generator to
an external applied reference source, a
synchronization time of approx. 30 seconds
for attuning all components of the video
output signal is required.
During this process the system re-locks
temporarily (the HOLD LED and the blue
LOCKED REF 1 LED are lightening alternately).
This has no relevance for system security.
The output clocks are constantly available.
!
This function also ensures a redundant (failsafe) availability of the video
output signals. If the external source fails temporarily or permanently, the
video generator will continue generating its output signals based on the
last recognized clock rate. If the external source returns to operation, any
differences to the previous rate will gradually be corrected to maintain
flawless on-air operation in e.g. broadcasting environments.
DIST (setting)
DISTRIBUTION This setting allows for forwarding the input video signal
to the video outputs using a hardware bypass. The signal is refreshed by
the video generator output amplifier to ensure a suitable output level; no
other modifications are made to the signal. If the DIST setting has been
selected for REF, the FORMAT and VIDEO TYPE functions cannot be selected
anymore. This is because the video output format is determined by the
input video reference signal.
In this mode, the synthesizer synchronizes to the input video signal to pro-
vide the output of phase locked audio clock signals.
FORMAT (function)
FORMAT This function allows for selecting the video format generated and
output by the video generator. The factory default is PAL.
PAL (setting)
PAL With this setting, the video generator produces a PAL-B/G standard de-
finition (SD) video signal compliant with the PAL/CCIR video standard (25 fps,
625 lines, 15,625.0Hz line frequency). Depending on the REF and VIDEO
TYPE settings, this signal can be output as Black+ Burst or composite video
sync. Even when a HD tri-level source is choosed as reference (HD-P-1/ 2), the
PAL setting is possible. Thus the internal video reference generator directly
converts incoming HD references with frame rates of 24Hz, 25Hz, 30Hz, 50Hz
or 60Hz into PAL SD video using its unique cross-locking functionality.
NTSC (setting)
NTSC With this setting, the video generator produces an NTSC standard
definition (SD) video signal (29.97fps, 525 lines, 15,734.25 Hz line frequency).
Depending on the REF and VIDEO TYPE setting, this signal can be output as
Black+ Burst or composite video sync.
Even when a HD tri-level source is choosed as reference (HD-N-1/ 2), the
NTSC setting is possible. Thus the internal video reference generator directly
converts incoming HD references with frame rates of 23.98Hz, 29.97Hz or
59.94Hz into NTSC SD video using its unique cross-locking functionality.
Refer to the »Synchronizable HD tri-level Standards and Frame Rates«section
in the APPENDIX for a list of all convertable HD standards and frame rates.
VIDEO TYPE (function)
VIDEO TYPE This function allows for outputting the previously selected
video format as Black + Burst or composite video sync signal. In addition,
when selecting composite video sync, one of two different output levels
can be set (see below). The factory default is BLACK +BURST.
BLACK + BURST (setting)
BLACK +BURST With this setting, the signal of the previously selected
format will be output as Black + Burst signal. Refer to the »Technical Data«
section in the APPENDIX.
COMPOSITE SYNC 0.3V (setting)
COMPOSITE 0.3V With this setting, the previously selected video format is
output as composite video sync signal with a negative sync signal level of
300 mV (0.3 V).
COMPOSITE SYNC 2.0V (setting)
COMPOSITE 2.0V With this setting, the previously selected video format is out-
put as composite video sync signal with a negative sync signal level of 2.0V.

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Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 16
WCLK - S, WCLK - L (page name)
WORD CLOCK – SINGLE, – LINKED, The »S« and »L« letters indicate the Sing-
le and Linked modes. Refer to the »ADJ-WCLK« parameter on the GLOBAL
3/4 page explained in the OPERATION chapter, »Setting System Functions«
for more information. The factory default is Single mode (– S).
OUT 1 - 4 (page name)
OUT1– 4 is the Word Clock out pair that can be configured on the current page.
FREQ (function)
FREQUENCY sets the clock rate of the selected output pair. The factory
default is 44.1 kHz.
24Hz...60Hz, 8.0kHz...24.576MHz (setting)
Altogether 36 different audio-related clock rates between 8.0kHz and
24.576 MHz can be selected individually for each Word Clock output pair.
Also 8 pilot tone clock rates from 24 Hz to 60Hz are available for synchroni-
zing pilot tone resolvers, timecode generators or film projectors and 5 dif-
ferent high-accurate clock references known from GPS receivers or atomic
clock generators. The individual rates are shortly described under
<FORMAT>. Refer to the »Synchronizable and Generatable Clock Rates«
section in the appendix for a full list of all clock rates.
‹FORMAT› (message)
FORMAT provides information on the output format of the currently selec-
ted Word Clock out pair. This parameter is provided for information purpo-
ses only (this is why it is displayed in brackets.) Setting is made against the
setting of the FREQ parameter. The factory default is WORDCLK.
WORDCLK (setting)
WORD CLOCK This setting means that the rate is output as set.
SUPERCLK (setting)
The SUPER CLOCK function is available for Word Clock rates of 44.1 or
48 kHz only. It is used for a rate adaptation required for Digidesign Pro-
Tools™ systems (not! ProTools HD™). Accordingly, the 44.1 kHz and 48 kHz
rates are available twice for selection: for both the WORDCLK and the
SUPERCLK, for ProTools™ systems, settings.
FILM FR (setting)
FILM FRAME RATE, 24 Hz
FILM FI (setting)
FILM FIELD RATE, 48 Hz
PAL FR (setting)
PAL VIDEO FRAME RATE, 25 Hz
PAL FI (setting)
PAL VIDEO FIELD RATE, 50 Hz
NTSC FRBW (setting)
NTSC VIDEO FRAME RATE, 30 Hz
NTSC FIBW (setting)
NTSC VIDEO FIELD RATE, 60 Hz
20
NTSC FRC (setting)
NTSC VIDEO FRAME RATE, 29.97 Hz
NTSC FIC (setting)
NTSC VIDEO FIELD RATE, 54.94 Hz
DSD64 (setting)
DSD clock rate, 2.8224 MHz
DSD128 (setting)
DSD double clock rate, 5.6448 MHz
DXD (setting)
DXD clock rate, 352.8 kHz
Word Clock rates are set independently
of externally applied clocks. Thus, iCLOCK
provides Word Clock conversion from all
supported input rates to all generatable
output rates!
GPS / Atomic Clock + Audio Player
References
As so-called GPS or atomic clock references,
the iCLOCK and iCLOCKdp are able to lock
and generate the following frequencies:
1.0Mhz, 2.5MHz, 5.0MHz, 10.0MHz
Furthermore, the iCLOCK and iCLOCKdp are
able to generate the following basic clock
rate used in e.g. CD players:
16.9344MHz
This clock signal can be used to replace a
CD player‘s internal system clock with the
16.9344MHz clock signal generated by the
iCLOCK or iCLOCKdp. Thus, a CD player
can benefit from the iCLOCK‘s lowest-jitter
clock generation which leads to an audible
sound improvement of the CD player‘s DA
converters!
Before replacing your CD player‘s internal
basic clock, check carefully if the frequency
of 16.9344MHz is the right one for your CD
player!
Due to the internal signal phase corrections
the synthesizer can re-lock temporarily when
switching Word Clock clock frequencies.
This does not affect the output signals or
functionality of iCLOCK.
WCLK-S FREQ ( FORMAT ) LEVEL / TERM
O U T 1 4 4 . 1 k W O R D C L K 2 . 5 V / 7 5 R
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WCLK page
Configuring the Word Clock Outputs
The WCLK OUT 1–4 display pages allow for configuring the eight wordclock
outputs provided by the iCLOCK standard version . Four output pairs
comprising one top-row and one bottom-row output each are available on
the rear panel. These are numbered as WORD CLOCK OUT 1–4. The BNC
terminals making up a pair are marked as »A« and »B«, thus allowing for a
simple documentation of the connected devices.
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