@database GENLOCKS
@remark $VER: 09.85 Fordray
@node MAIN
@title "NERIKI DeskTop and ImageMaster Genlock Manuals"
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                  Fordray Electronic Developments Pty Ltd
                             OPERATION MANUAL
          For the NERIKI range of Genlocks for Amiga computers.
   ****************************** WARNING ******************************
This  equipment  generates, uses and can radiate radio frequency energy and
if  not  installed  and used in accordance with the instruction manual, may
cause  interference  to radio communications.  It has been tested and found
to  comply  with  the  limits  for  a  Class A Computing Device pursuant to
Subpart J of Part 15 of FCC rules, which are designed to provide reasonable
protection   against  such  interference  when  operated  in  a  commercial
environment.   Operation  of this equipment in a residential area is likely
to cause interference, in which case the user, at their own expense, should
    take whatever measures may be required to correct the interference.

   *************************** CONFIDENTIAL ****************************
The material contained within this document consists of information that is
the  property  of  Fordray  Electronic Developments Pty Ltd and is intended
solely  for  the use of the purchasers of the NERIKI DeskTop or ImageMaster
Genlocks.   Fordray Electronic Developments Pty Ltd expressly prohibits the
duplication  of any part of this document, or the use thereof for any other
purpose,  other  than  the  operation  of  the  equipment described in this
document, without the written permission of Fordray Electronic Developments
                                 Pty Ltd.

                  @{"   Select me to see list of contents   " link MENU}
                  @{" Select me to read a note from Fordray " link SIGNOFF}
@endnode

@node MENU





       Please select the model of NERIKI Genlock you have purchased:


                     @{" GL1189         'DeskTop'         " link DESKTOP}
                     @{" GL1187C      'ImageMaster'       " link IMAGE}
                     @{" GL1190  Remote Control 'DeskTop' " link REMOTE}
@endnode

@node DESKTOP
@title "NERIKI DeskTop Genlock"
         --------------------------------------------------------
                     MODEL GL1189/90 "DeskTop" Series
         --------------------------------------------------------
                             TABLE OF CONTENTS
         --------------------------------------------------------

SECTION ONE:   OVERVIEW

1.1  @{" FEATURES " link FEATURES}
1.2  @{" FUNCTIONS OF CONTROLS & CONNECTIONS " link FUNCTIONS}
1.3  @{" CONNECTIONS & OPERATION " link CONNECTIONS}
1.4  @{" SPECIFICATIONS " link SPECS}

SECTION TWO:   INSTALLATION

2.1  @{" ACCESSORIES SUPPLIED " link ACCESSORIES}
2.2  @{" CONNECTING CABLES " link CABLES}
2.3  @{" POWER REQUIREMENTS " link POWER}
2.4  @{" INSTALLATION CONDITIONS " link INSTALREQ}

SECTION THREE: TAKING CARE OF THE GENLOCK

3.1  @{" GENERAL INFORMATION " link GENERALINFO}
3.2  @{" CLEANING " link CLEANING}
3.3  @{" TROUBLESHOOTING " link TROUBLE}

@endnode

@node FEATURES
1.1  FEATURES

- WORKS WITH ALL AMIGA MODELS - The Neriki DeskTop Genlock may be connected
to  all  currently  released  models  of  the Amiga Personal Computer;A500,
A500+, A600, A1000, A1200, A1500, A2000(A/B), A2500, A3000, A4000(T).

-  SELF  POWERED  - The genlock unit operates without taking power from the
Amiga  computer,  allowing  the  use  of any number of peripherals, such as
extra  memory, hard drives, internal and external 3.5" or 5.25" floppy disk
drives.   There is no loss of video quality associated with the use of such
items.

-  SUPPORTS ALL NATIVE SCREEN RESOLUTIONS AVAILABLE - The unit supports all
the  native  screen  resolutions  available  on  every Amiga, including low
(320x256  32  cols),  medium  (640x256 32 cols) and high (640x512 16 cols),
including overscan.  The unit also supports HAM mode (Hold- And-Modify 4096
cols) and those AGA (A1200 / A4000) video modes flagged as 'Genlockable'.

-  HIGH  LUMINANCE RESOLUTION AND ACCURATE CHROMA ENCODING - The encoder in
the  unit  is  capable  of  600  lines  in PAL format and 550 lines in NTSC
format.

-  DISSOLVE  AND FADE TO KEY - The Genlock is equipped with a fader to give
professional  results on the recorded output.  The fader has two selectable
functions;
     1. Dissolve from input video to computer image
     2. Fade to key computer image

-  KEY  TO  BACKGROUND COLOUR ZERO - The Amiga's video circuitry allows the
Genlock  to  take  full  advantage  of  the  Amiga's 'colour register zero'
feature.   This  enables  the  operator  to  key  out the background colour
register  zero,  independent of it's colour.  In effect this acts similarly
to  a  chroma  keyer,  but  with the added ability of using this background
colour elsewhere in the image by defining another colour register to be the
same colour as the background.  The unit will not key to this register even
though it is the same colour as the background.

-  AUTOMATIC CHROMA DETECTION CIRCUIT - The chroma detection circuit allows
the  unit  to adjust itself automatically to the signal being fed in.  If a
black  and white signal is fed to the genlock, the resulting computer image
is stripped of all chroma information.

-  'LOOP THROUGH' REFERENCE VIDEO (composite only model) - The Genlock unit
has the capability of either terminating the reference video internally, or
looping  it  through  if  the  reference video is required elsewhere in the
system.

-  NO  SYNC  REQUIRED  WHEN  INPUT  VIDEO  IS REMOVED - Once the Genlock is
supplied  with an input video source and the Genlock and computer have been
switched  on,  the  input  video  source  may  be removed.  The Genlock and
computer  will  free  run,  outputting only an RGB signal for use with your
Amiga  monitor - the composite/Y-C video output will be disabled.  When the
original  (or  a new) video signal is reconnected, the composite/Y-C output
is  re-enabled.  This allows the operator to change the video source at any
time  without  interruption  to the computer or Genlock, as both units will
remain  operational.   Some  interruption  to  the  RGB  may  occur  during
re-genlocking.

@{" Return " link DESKTOP}
@endnode

@node FUNCTIONS
1.2  FUNCTIONS OF CONTROLS & CONNECTIONS



1.2.1     Front Panel



Contents of front panel from left to right:

DISSOLVE  -  With  this  control turned fully counter-clockwise, the output
will  be external video only.  When turned fully clockwise, the output will
be  computer  video  only,  or  a keyed computer image over external video,
depending on the position of the DISSOLVE / KEY switch described below.

EFFECT  (Key  Enable)  -  Depending on the position of the DISSOLVE control
knob,  performs either a fast cut between input video and computer image or
key effect on/off.

DISSOLVE  / KEY - Defines the operation of the DISSOLVE control knob.  When
UP, the control knob dissolves from external video to computer image.  When
DOWN,  the  control  knob  fades in the keyed computer image over the input
video.

POWER LED - Glows red when power is supplied to the Genlock.  (Note for DYC
models only - LED glows green when a valid input video signal is present.)

POWER - In the UP position, power to the unit is OFF, and the red POWER LED
should  not light.  When in the DOWN position, power to the unit is ON, and
the red POWER LED should light.



1.2.2     Rear Panel



Contents of rear panel from left to right:

MAINS POWER - The supplied (standard IEC) power cord plugs in here.

VIDEO  OUT - A composite video output is available from this BNC connector,
comprising  the  reference  source (input video) and the superimposed Amiga
image  (if  any).  This composite video is 1 volt p/p 75 ohm, with the sync
and  burst of the reference video, regardless of the characteristics of the
computer video.

GENLOCK  IN  /  VIDEO  IN  - This BNC connector accepts the reference video
source, which is either PAL or NTSC composite video (depending on model).

LOOP  OUT / VIDEO OUT (composite only models) - This BNC connector provides
unaltered  reference  video  in  composite format, allowing it to be viewed
without  the use of front panel controls.  OLDER MODELS:  If this connector
is  not  used,  the LOOP/TERM switch MUST be set to the TERM position.  See
next item.

LOOP  /  TERM (OLDER MODELS) - To obtain an unaltered reference source from
the  LOOP  OUT BNC connector, this switch must be set to the LOOP position.
If  the LOOP OUT BNC connector is not used, this switch MUST be set to TERM
to properly terminate the input video signal.

COMPUTER - This 25 pin 'D' female socket accepts the computer image source,
via the Amiga's RGB port.

RGB MONITOR - This 23 pin 'D' male socket outputs the computer image in RGB
to any Commodore Amiga, analogue RGB or multisync monitor.

Y-C  OUT - This socket delivers a Y-C output signal when Y-C input video is
used.

Y-C IN - This connector accepts a Y-C signal as the reference source.

***  NOTE FOR DESKTOP MODELS UP TO AND INCLUDING SERIAL NUMBER PDT1007:
***
***  Do  not  connect  both  Y-C and composite connectors at the same time.
***  Use only the connectors of the signal you are using.
***  Failure to do so will cause interference in your chosen signal.

***  NOTE FOR DESKTOP MODELS FROM SERIAL NUMBER PDT1008 ONWARDS:
***
***  The composite and Y-C OUTPUTS may both be left connected, regardless
***  of the input signal.  Note that you may still only connect ONE INPUT
***  at a time, either composite or Y-C.
***
***  If you use composite input, the Y-C connector will give out a
***  monochrome picture via the Luminance connection.
***
***  If you use a Y-C input, the composite BNC will give out a monochrome
***  composite signal.

REMOTE  (Model  GL1190/D  only) - a standard 25 pin parallel cable connects
this port to the NERIKI RM02 Hardware Remote Control unit, or to an Amiga's
parallel (printer) port for software control from the Amiga.

@{" Return " link DESKTOP}

@endnode

@node REMOTE

1.2.3     REMOTE CONTROL OPTION (GL1190/D Only)

Purchasers  of  Remote  Control  NERIKI  Genlocks  should  read  all of the
standard  (GL1189/D)  DeskTop  instructions,  then read the reference sheet
included  with  their RM02 Remote Controller or the document files on their
Arexx  compatible  NERIKOM  software  disks  for  detailed information on
Remote Control.

The  GL1190 has no front panel controls at all except for the power switch,
therefore  all  references  to  front  panel  controls  in  this manual are
inappropriate.  All other specifications are as for GL1189 model Genlocks.

The  GL1190 Remote Control NERIKI DeskTop Genlock provides all of the usual
genlock front panel functions through remote hardware or Amiga software and
adds  refinement  to Dissolves and Keys via timed fades.  Also, a 'Keyhole'
effect  is  added to the Genlock's operations, whereby instead of the input
video  source  appearing  through  Amiga  Colour  Register Zero, it appears
through all Amiga colours EXCEPT for Colour Register Zero.

@{" Return " link MENU}

@endnode

@node CONNECTIONS

1.3  CONNECTIONS AND OPERATION



1.3.1     As a Standalone System



The  connections in the Standalone system allow you to set up the Amiga and
Genlock  with  a  minimum of video equipment and still achieve professional
results.   The requirements of this system are a composite or Y-C reference
source,  such  as  a  video  cassette recorder or video camera and either a
television  monitor  or  video  cassette  recorder to capture the genlocked
computer  video.   In  this  system, the connections of the five points are
straightforward.   The  first  two  are standard no matter how or where you
decide to use your Genlock.

The computer and Genlock are connected using the Computer Genlock Interface
Cable.   Connect  this  cable to the Amiga's video socket which is labelled
either  RGB,  VIDEO  or  RGB-VIDEO, depending on the Amiga model used.  The
other  end  of  this  cable  is  attached  to  the  genlock socket labelled
COMPUTER.

                                   ~~~~
NOTE:   If  you are using an Opalvision or other 24 bit display board, you
MUST  connect  the  NERIKI to the Opal board's video connector, NOT to your
Amiga's video port.
                                   ~~~~

The  second  connection  is  made  with an RGB video cable from the Genlock
socket labelled RGB MONITOR to the Amiga monitor or analogue RGB monitor.

The video connections in this type of system are as follows.

Firstly,  the  Genlock  must be supplied with reference video.  This can be
any  composite  or Y-C video source, e.g.  video cassette recorder or video
camera.   Connect  a BNC to BNC cable to the VIDEO OUT socket on your video
camera  or  video  cassette  recorder,  and the other end to the BNC socket
labelled GENLOCK IN on the Genlock.

To  record or view the superimposed Amiga's image on the input video, a BNC
cable will have to be connected to the Genlock socket labelled VIDEO OUT at
one  end,  and  to  your  composite  television  monitor  or video cassette
recorder  at  the  other.   Alternatively, when using a Y-C system, you may
connect  a mini-din cable to the Y-C OUT socket on your Genlock at one end,
and a Y-C monitor or recorder at the other.

Summary of Connections and Settings in Standalone System:

1. VIDEO OUT   --> Record VCR or Video Monitor
2. GENLOCK IN  --> Playback VCR or Video Camera
3. COMPUTER    --> Amiga RGB Video Socket
4. RGB MONITOR --> Amiga monitor or analogue RGB Monitor
5. Y-C OUT     --> Y-C Monitor or S-VHS Recorder
6. Y-C IN      --> Any Y-C Video Source (S-VHS Camera or Player)

Although  we have only discussed connecting the Genlock in this simplest of
systems,  all  kinds  of  video  equipment  may  be used.  The computer and
Genlock  may  be  located  between the A and B machines in video production
houses and used as a titling and effects machine.



1.3.2     WITH AN EDITING / MIXING DESK.



The  unit  can be located in a professional mixing desk allowing the use of
downstream  keying,  chroma  keying  and  the mixing of more than one video
source.   The  major  difference  in this configuration is that the Genlock
reference  signal  is supplied from a colour black signal, which also feeds
all other video equipment in the system.

The  connections  are as in the above summary, except the VIDEO OUT Genlock
socket  (BNC)  is  connected  to a mixing desk input instead of a composite
television monitor or video cassette recorder.



1.3.3     TURNING ON THE POWER



Once  you  have  made  all  connections  as  outlined  above, the following
procedure should be adhered to.

The  first  item to be turned on is the reference video source, followed by
the  Genlock.  This allows the Genlock to determine the sync being used and
to generate a stable sync to slave the computer.  If you have connected the
VIDEO  OUT  BNC to a composite television monitor, moving the EFFECT switch
to  the  UP  position  (Key  Disable) will allow you to view this reference
video  on the composite television monitor connected to the Genlock's Video
Out port.

After  the  reference  source  and  the  Genlock  have  been turned on, the
computer may be switched on.  Moving the EFFECT switch to the DOWN position
(Key  Enable),  and  the  Dissolve  knob fully clockwise you should see the
genlocked computer image.

                          *** Startup Order: ***

                  1.   Reference Video / sync source
                  2.   Genlock
                  3.   Computer



1.3.4     Input Video Sources



A Genlock is a device which locks the video signal from a computer, both in
frequency  and  phase,  to  a  reference signal.  To allow this, the signal
supplied  to  the  Genlock must be a STANDARD (PAL or NTSC) composite video
signal  from  a  camera, sync generator or videotape machine.  The STANDARD
composite  video  signal  has  70%  video to 30% sync ratio with 30% colour
burst.

For  optimum  results  it  is  recommended  that the signal supplied to the
Genlock  should  be from a sync pulse generator (SPG) or timebase corrector
(TBC).   However,  if  an  SPG  or  TBC  input source is not available, the
Genlock  has  been  designed  for  use  with  1/2  and  3/4 inch video tape
recorders that adhere to the described output video STANDARD.

The  Genlock's  performance  will  be impaired without a stable video input
source,  resulting  in:
 - picture distortion
 - image tearing
 - horizontal movement of vertical lines
 - Colour instability
 - Vertical image instability ('jitter')

The input video source can be impaired by:
- Faulty or mis-aligned video/sync source equipment (VCRs, etc.)
- Poor quality video tape used for playback
-  System  configurations  in  a studio application (interaction of mixers,
playback machines or cabling)

If  you  have difficulties interfacing the Genlock to your video system and
have checked your equipment, cabling and system configuration, please refer
to your local service agent.

@{" Return " link DESKTOP}
@endnode

@node SPECS

1.4  SPECIFICATIONS

General
-------
Dimensions.........................483 x 44 x 254 mm (W/D/H)
                                   (19 x 1.75 x 10 in.)
Weight.............................5Kg (11lb)


GL1189
------
INPUTS         COMPOSITE                1V p/p 75 ohm
               BANDWIDTH                >6.0MHz 1db
               SIGNAL TO NOISE RATIO    60db 5MHz low pass

               Y-C
               Y                        1V p/p 75 ohm
                                        >6.0MHz 1db
               C                        0.3V p/p 75 ohm
                                        1.3MHz

OUTPUTS        COMPOSITE VIDEO          1V p/p 75 ohm
               LOOP THROUGH VIDEO       1V p/p 75 ohm
               (composite only models)

               Y-C
               Y                        1V p/p 75 ohm
               C                        0.3V p/p 75 ohm burst

@{" Return " link DESKTOP}
@endnode

@node ACCESSORIES

2.1  ACCESSORIES SUPPLIED

COMPUTER-GENLOCK INTERFACE CABLE x 1

A one metre long computer to Genlock cable for connection of Amiga computer
and Neriki DeskTop Genlock.  Cables of up to 5 metres may be ordered.

DEMONSTRATION DISKETTE x 1

Contains  this  Operation  Manual,  demonstration  programs  including  75%
saturated  PAL  colour  bars,  titles and graphics, a glossary of terms and
some usage hints.

NERIKI VIDEO TOOLS ON TAP SOFTWARE x 1

Video Tools On Tap (VTOT) offers many utilities and effects to help you get
the   most   from  your  Amiga  desktop  video  projects.   VTOT  is ARexx
compatible,  fully  multitasking,  and may be accessed by mouse or hotkeys.
VTOT's  hotkey  controls  may  be  customised to prevent clashing with your
other  software.   Please  see  VTOT's  included manual for a comprehensive
description  of  available  commands.   If  you  have purchased your NERIKI
second  hand,  VTOT  may be purchased from Fordray.  See our address in the
'Note  from  Fordray'  page,  accessible  from  the [C]ontents page of this
document.

@{" Return " link DESKTOP}
@endnode

@node CABLES

2.2  CONNECTING CABLES

- COMPUTER to GENLOCK

Use  the  computer to Genlock interface cable supplied (standard length 1m)
and  NO  OTHER CABLES, to connect your Amiga and Genlock together.  Failure
to  use  the  supplied  interface  cable  may  result  in  radio  frequency
interference problems or damage to Genlock or computer.

- RGB MONITOR to GENLOCK

Use  the  standard  Amiga 23 pin 'D' type connector to scart (monitor plug)
cable supplied with your Amiga.  Use NO OTHER CABLES.  Other connectors are
BNC  type,  with  mini-din  for the use of Y-C only.  The monitor connector
will operate with 1084S style and multisync monitors.

*NOTE:  Older model NERIKIs may require upgrading to operate with multisync
monitors.

@{" Return " link DESKTOP}
@endnode

@node POWER

2.3  POWER REQUIREMENTS

Power Line Voltage.......AC 100-120/230-250V depending on model
                         100-120V AC
                         210-230V AC    to order
                         230-250V AC
Power Line Frequency.....48-62Hz
Power Consumption........14W

@{" Return " link DESKTOP}
@endnode

@node INSTALREQ

2.4  INSTALLATION CONDITIONS

DO NOT install NERIKI Genlocks in any location subject to:

- Dust
- Vibration
- Strong magnetic or electric fields
- Prolonged direct exposure to sunlight
- Moisture

Installation space requirements:

Width          430mm
Depth          16mm (front) + 254mm (case) + 14mm (rear) = 284mm
Height         44mm

@{" Return " link DESKTOP}
@endnode

@node GENERALINFO

3.1  GENERAL INFORMATION

Follow the suggestions below to ensure the long life of your Neriki DeskTop
Genlock.

Give  the  Genlock plenty of space for the circulation of air.  There are a
number  of  ventilation slots on the top of the Genlock which allow heat to
escape,  so  be  sure to leave them unobstructed.  Do not place anything on
the top of the Genlock, especially paper.

Be careful not to spill liquids onto or into the Genlock.

The  genlock can tolerate a wide temperature range, but do not let the unit
stand in direct sunlight.

The  unit  may  feel  warm  to the touch after it has been operating for an
extended period.  This is normal and will dissipate naturally.

@{" Return " link IMAGE}
@endnode

@node CLEANING

3.2  CLEANING

To  clean the unit, wipe over with a damp (not dripping) cloth.  Do not use
a cleaning liquid, spray or any other substance which could cause damage if
it should penetrate the unit.

@{" Return " link DESKTOP}
@endnode

@node TROUBLE

3.3  TROUBLESHOOTING

If  the  Genlock  fails  to  operate  or  stops  working, try the solutions
outlined  below.   If  this  fails  to  rectify  the  problem, contact your
authorised dealer.


SYMPTOM:  The Power LED is not alight
PROBABLE CAUSE: Genlock is not getting power.
WHAT  TO DO:  Make sure the Genlock is turned on and that the power cord is
firmly  attached to both the Genlock and the wall outlet, and that the wall
switch is turned on.


SYMPTOM: Genlock is on, but no output
PROBABLE  CAUSE:   The Genlock is not receiving a reference sync source, or
there  is  no  connection from the VIDEO OUT/Y-C Out socket to the monitor.
WHAT  TO DO:  Check that a reference source is connected to the Genlock and
is switched on.  Check connection between VIDEO/Y-C OUT and monitor.


SYMPTOM: No computer video mixed with reference source at output
PROBABLE  CAUSE:  The computer is incorrectly connected or not switched on,
or the EFFECT (Key Enable) switch is in the incorrect position.
WHAT  TO  DO:  Check that Genlock and computer are connected as outlined in
1.3.1  and 1.3.2.  Ensure that the equipment was switched on in the correct
order  as  outlined in 1.3.3.  Ensure that the EFFECT switch is in the DOWN
(Enable) position.


SYMPTOM: No RGB on Amiga Monitor
PROBABLE CAUSE:The monitor is incorrectly connected or not switched on.
WHAT  TO  DO:  Check connections as above.  Ensure RGB monitor is connected
correctly.


SYMPTOM: Computer image is not centred on the resulting Output.
PROBABLE CAUSE: Preferences have not been set.
WHAT  TO  DO:   Run Preferences from your Amiga Workbench screen (see Amiga
User's  Guide).   The  screen position gadget in the Preferences screen can
help with horizontal positioning.

@{" Return " link DESKTOP}
@endnode

@node SIGNOFF



                        NERIKI TELEVISION PRODUCTS
                    BROADCAST QUALITY VIDEO ELECTRONICS
               PROUDLY AUSTRALIAN DESIGNED AND MANUFACTURED
                                SINCE 1987



We  hope that your Neriki Genlock for Amiga provides you with productivity,
               success and enjoyment for many years to come.

                  Fordray Electronic Developments Pty Ltd
                     9 Hawthorn Place / P.O. Box 1265
                            ORANGE   NSW   2800
                                 Australia
          AUS   Ph. (063) 62 9901       O/S   Ph. +61 63 62 9901
          AUS   Fax (063) 62 8675       O/S   Fax +61 63 62 8675



@{" Return " link MENU}
@endnode

@node IMAGE
@title "NERIKI ImageMaster Genlock"
         --------------------------------------------------------
                    MODEL GL1187C "ImageMaster" Series
         --------------------------------------------------------
                             TABLE OF CONTENTS
         --------------------------------------------------------

SECTION ONE:   OVERVIEW

1.1  @{" FEATURES " link C_FEATURES}
1.2  @{" FUNCTIONS OF CONTROLS & CONNECTIONS " link C_FUNCTIONS}
1.3  @{" CONNECTIONS & OPERATION " link C_CONNECTIONS}
1.4  @{" SPECIFICATIONS " link C_SPECS}

SECTION TWO:   INSTALLATION

2.1  @{" ACCESSORIES SUPPLIED " link C_ACCESSORIES}
2.2  @{" CONNECTING CABLES " link C_CABLES}
2.3  @{" POWER REQUIREMENTS " link C_POWER}
2.4  @{" INSTALLATION CONDITIONS " link C_INSTALREQ}

SECTION THREE: TAKING CARE OF THE GENLOCK

3.1  @{" GENERAL INFORMATION " link C_GENERALINFO}
3.2  @{" CLEANING " link C_CLEANING}
3.3  @{" TROUBLESHOOTING " link C_TROUBLE}

@endnode

@node C_FEATURES
1.1  FEATURES

-  WORKS  WITH  ALL  AMIGA  MODELS  - The Neriki ImageMaster Genlock may be
connected   to   all  currently  released  models  of  the  Amiga  Personal
Computer;A500,  A500+, A600, A1000, A1200, A1500, A2000(A/B), A2500, A3000,
A4000.

- SELF POWERED - Being self powered, the unit operates without taking power
from  the  Amiga  computer,  allowing the use of any number of peripherals,
such  as  extra  memory,  hard  drives, internal and external 3.5" or 5.25"
floppy  disk drives.  There is no loss of video quality associated with the
use of such items.

-  SUPPORTS ALL NATIVE SCREEN RESOLUTIONS AVAILABLE - The unit supports all
the  native  screen  resolutions  available  on  the  Amiga,  including low
(320x200  32  cols),  medium  (640x200 32 cols), high (640x400 16 cols) and
interface  signals.  The unit also supports HAM mode (Hold- And-Modify 4096
cols) and those AGA modes flagged as 'Genlockable'.

-  OPTIONAL  Y-C  or YUV VIDEO OUTPUT - the ImageMaster may be ordered with
either Y-C or YUV output in addition to composite and RGB.

-  OPTIONAL  360  SUBCARRIER  PHASING  ADJUST  - standard ImageMasters are
supplied  with  270  SCP  adjustment  capability,  but  a full 360 may be
ordered as an optional extra.

- RACK MOUNTABLE - The ability of the unit to operate on a standalone basis
or  in  a  studio  situation  makes  it  an extremely versatile unit.  When
located  in  a  19" rack, the Genlock may be positioned away from the Amiga
and located with the video equipment by using optional extension cables.

-  EXTERNAL  KEY  INDEPENDENT OF INTERNAL KEY - The internal key is totally
independent  of  the external Key Out BNC.  This external key is delayed so
that  the  operator can feed both the internal key effects and external key
to  a  mixer and thereby create more effects.  The unit is not limited by a
fixed  key  level  and  the  operator  is  not restricted to using just the
internal key.

-  HIGH  LUMINANCE RESOLUTION AND ACCURATE CHROMA ENCODING - The encoder in
the  unit  is  capable  of  600  lines  in PAL format and 550 lines in NTSC
format.

-  DISSOLVE  AND FADE TO KEY - The Genlock is equipped with a fader to give
professional  results on the recorded output.  The fader has two selectable
functions;
     1. Dissolve from input video to computer image
     2. Fade to key computer image

-  KEY  TO  BACKGROUND COLOUR ZERO - The Amiga's video circuitry allows the
genlock  to  take  full advantage of the Amiga's background colour register
zero  feature.   This enables the operator to key out the background colour
register  zero,  independent of it's colour.  In effect this acts similarly
to  a  chroma  keyer,  but  with the added ability of using this background
colour elsewhere in the image by defining another colour register to be the
same colour as the background.  The unit will not key to this register even
though it is the same colour as the background.

-  AUTOMATIC CHROMA DETECTION CIRCUIT - The chroma detection circuit allows
the  unit  to adjust itself automatically to the signal being fed in.  If a
black  and  white signal is fed to the genlock the resulting computer image
is stripped of all chroma information.

-  'LOOP  THROUGH' REFERENCE VIDEO - The Genlock unit has the capability of
either terminating the reference video internally, or looping it through if
the reference video is required elsewhere in the system.

-  NO  SYNC  REQUIRED  WHEN  INPUT  VIDEO  IS REMOVED - Once the Genlock is
supplied  with an input video source and the Genlock and computer have been
switched  on,  the  input  video  source  may  be removed.  The Genlock and
computer  will  free  run,  outputting only an RGB signal for use with your
Amiga  monitor - the composite/Y-C/YUV video output will be disabled.  When the
original  (or  a new) video signal is reconnected, the composite/Y-C output
is  re-enabled.  This allows the operator to change the video source at any
time  without  interruption  to the computer or Genlock, as both units will
remain  operational.   Some  interruption  to  the RGB may occur during re-
genlocking.

@{" Return " link IMAGE}
@endnode

@node C_FUNCTIONS

1.2  FUNCTIONS OF CONTROLS & CONNECTIONS



1.2.1     Front Panel



Contents of front panel from left to right:

DISSOLVE  -  With  this  control turned fully counter-clockwise, the output
will  be external video only.  When turned fully clockwise, the output will
be  computer  video  only,  or  a keyed computer image over external video,
depending on the position of the DISSOLVE / KEY switch described below.

EFFECT  (Key  Enable)  -  Depending on the position of the DISSOLVE control
knob,  performs either a fast cut between input video and computer image or
key effect on/off.

DISSOLVE  / KEY - Defines the operation of the DISSOLVE control knob.  When
UP, the control knob dissolves from external video to computer image.  When
DOWN,  the  control  knob  fades in the keyed computer image over the input
video image.

POWER  LED  - Glows red when power is supplied to the Genlock.  (DYC models
only - LED glows green when a valid input video signal is present.)

CHROMA  -  On  standard  ImageMasters,  this is a two position switch which
gives  a  180  phase  shift  to chroma.  On 360 Sub Carrier Phasing (SCP)
model  ImageMasters,  this  is a 12 position rotary switch, allowing a much
greater range of chroma phase adjustment.

PHASE - This is a chroma phase fine control multiturn potentiometer with a
range of 20.  Coupled with the SCP option, this allows chroma phase to be
infinitely adjustable over a full 360.

POWER - In the UP position, power to the unit is OFF, and the red POWER LED
should  not light.  When in the DOWN position, power to the unit is ON, and
the red POWER LED should light.



1.2.2     Rear Panel



Contents of rear panel from left to right:

MAINS POWER - The supplied power cord plugs in here.

SYNC  OUT  -  This BNC supplies the same sync as the reference video, at 1v
p/p 75 ohm neg.

VIDEO  OUT - A composite video output is available from this BNC connector,
comprising  the reference source and the superimposed Amiga image (if any).
This  composite  video is 1 volt p/p 75 ohm, with the sync and burst of the
reference video, regardless of the characteristics of the computer video.

GENLOCK  IN  - This BNC connector accepts the reference video source, which
is either PAL or NTSC composite video (depending on model).

LOOP  OUT  -  This  BNC  connector  provides  unaltered  reference video in
composite  format,  allowing it to be viewed without the use of front panel
controls.   If this connector is not used, the LOOP/TERM switch MUST be set
to the TERM position.  See next item.

LOOP / TERM - To obtain an unaltered reference source from the LOOP OUT BNC
connector,  this  switch must be set to the LOOP position.  If the LOOP OUT
BNC  connector  is  not  used,  this switch MUST be set to TERM to properly
terminate the input video signal.

BLACK / VIDEO - When this switch is in the BLACK position, the colour black
phasing  circuit is enabled.  When set to the VIDEO position, any composite
video source may be fed into the GENLOCK IN BNC.

COMPUTER - This 25 pin 'D' female socket accepts the computer video source,
via the Amiga's RGB port.

RED  /  GREEN  /  BLUE  -  These individual BNCs are 0.7 volt non-composite
signals  from  the  computer  video only, which may be fed into an external
coder or chroma keyer.  These outputs are not delayed.

Y / U / V (Optional) - These BNCs provide a component video signal in place
of RGB.  This signal is of computer image only.

KEY  OUT  -  This  BNC  supplies an external key signal, independent of the
internal  key.   The  signal  from  this  BNC is 0.7 volt p/p 75 ohm and is
delayed  to  align with the composite output.  (The key output may be timed
to RGB using internal straps.)

RGB MONITOR - This 23 pin 'D' male socket outputs the computer image in RGB
to any Commodore Amiga, analogue RGB or multisync monitor.

Y -C  (Optional) -  This pair of BNCs delivers a 1 volt p/p luma / 0.3 volt
p/p  chroma  Y-C  output  signal  of  computer  image only.  A valid colour
reference must be connected to the Genlock input when using Y-C output.

@{" Return " link IMAGE}

@endnode

@node C_CONNECTIONS
1.3  CONNECTIONS AND OPERATION

1.3.1     As a Standalone System

The  connections in the Standalone system allow you to set up the Amiga and
Genlock  with  a  minimum of video equipment and still achieve professional
results.  The requirements of this system are a composite reference source,
such  as  a video cassette recorder or video camera and either a television
monitor or video cassette recorder to capture the genlocked computer video.
In  this  system,  the  connections of the four points are straightforward.
The  first  two  are standard no matter how or where you decide to use your
Genlock.

The computer and Genlock are connected using the Computer Genlock Interface
Cable.   Connect  this  cable to the Amiga's video socket which is labelled
either  RGB,  VIDEO  or  RGB-VIDEO, depending on the Amiga model used.  The
other  end  of  this  cable  is  attached  to  the  genlock socket labelled
COMPUTER.

                                   ~~~~
NOTE:   If  you are using an Opalvision or other 24 bit display board, you
MUST  connect  the  NERIKI to the Opal board's video connector, NOT to your
Amiga's video port.
                                   ~~~~

The  second  connection  is  made  with an RGB video cable from the Genlock
socket labelled RGB MONITOR to the Amiga monitor or analogue RGB monitor.

The video connections in this type of system are as follows.

Firstly,  the  Genlock  must be supplied with reference video.  This can be
any  composite video source, e.g.  video cassette recorder or video camera.
Connect  a BNC to BNC cable to the VIDEO OUT socket on your video camera or
video  cassette  recorder,  and  the  other  end to the BNC socket labelled
GENLOCK IN on the Genlock.

To  record or view the superimposed Amiga's image on the input video, a BNC
cable will have to be connected to the Genlock socket labelled VIDEO OUT at
one  end,  and  to  your  composite  television  monitor  or video cassette
recorder  at  the  other.

When used in such a standalone system, switch settings must be:

LOOP / TERM switch to LOOP
BLACK/VIDEO switch to VIDEO

Summary of Connections and Settings in Standalone System:

1. VIDEO OUT   --> Record VCR or Video Monitor
2. GENLOCK IN  --> Playback VCR or Video Camera
3. COMPUTER    --> Amiga RGB Video Socket
4. RGB MONITOR --> Amiga monitor or analogue RGB Monitor

Although  we have only discussed connecting the Genlock in this simplest of
systems,  all  kinds  of  video  equipment  may  be used.  The computer and
Genlock  may  be  located between the A and B machines in an edit suite and
used as a titling and effects machine.

1.3.2     WITH AN EDITING / MIXING DESK.

The  unit  can be located in a professional mixing desk allowing the use of
downstream  keying,  chroma  keying  and  the mixing of more than one video
source.   The  major  difference  in this configuration is that the Genlock
reference  signal  is supplied from a colour black signal, which also feeds
all other video equipment in the system.

The  connections  are as in the above summary, except the VIDEO OUT Genlock
socket  (BNC)  is  connected  to a mixing desk input instead of a composite
television monitor or video cassette recorder.

1.3.3     Turning On The Power

Once  you  have  made  all  connections  as  outlined  above, the following
procedure should be adhered to.

The  first  item to be turned on is the reference video source, followed by
the  Genlock.  This allows the Genlock to determine the sync being used and
to generate a stable sync to slave the computer.  If you have connected the
VIDEO  OUT  BNC to a composite television monitor, moving the EFFECT switch
to  the  UP  position  (Key  Disable) will allow you to view this reference
video on the composite television monitor connected to Genlock Video Out.

After  the  reference  source  and  the  Genlock  have  been turned on, the
computer may be switched on.  Moving the EFFECT switch to the DOWN position
(Key  Enable),  and  the  Dissolve  knob fully clockwise you should see the
genlocked computer image.

                          *** Startup Order: ***

                  1.   Reference Video / sync source
                  2.   Genlock
                  3.   Computer

1.3.4     Input Video Sources

A Genlock is a device which locks the video signal from a computer, both in
frequency  and  phase,  to  a  reference signal.  To allow this, the signal
supplied  to  the  Genlock must be a STANDARD composite video signal from a
camera,  sync generator or videotape machine.  The STANDARD composite video
signal has 70% video to 30% sync ratio with 30% colour burst.

For  optimum  results  it  is  recommended  that the signal supplied to the
Genlock  should  be from a sync pulse generator (SPG) or timebase corrector
(TBC).   However,  if  an  SPG  or  TBC  input source is not available, the
Genlock  has  been  designed  for  use  with  1/2  and  3/4 inch video tape
recorders that adhere to the described output video STANDARD.

The  Genlock's  performance  will  be impaired without a stable video input
source,  resulting  in:
 - picture distortion
 - image tearing
 - horizontal movement of vertical lines
 - Colour instability
 - Vertical image instability ('jitter')

The input video source can be impaired by:
- Faulty or mis-aligned video/sync source equipment (VCRs, etc.)
- Poor quality video tape used for playback
-  System  configurations  in  a studio application (interaction of mixers,
playback machines or cabling)

If  you  have difficulties interfacing the Genlock to your video system and
have checked your equipment, cabling and system configuration, please refer
to your local service agent.

@{" Return " link IMAGE}
@endnode

@node C_SPECS

1.4  SPECIFICATIONS

General
-------
Dimensions.........................483 x 44 x 254 mm (W/D/H)
                                   (19 x 1.75 x 10 in.)
Weight.............................5Kg (11lb)


GL1187C
-------
INPUTS         COMPOSITE                1V p/p 75 ohm
               BLACK BURST              0.3V p/p loop or terminate
               BANDWIDTH                >6.0MHz 1db
               SIGNAL TO NOISE RATIO    60db 5MHz low pass

               Y-C
               Y                        1V p/p 75 ohm
                                        >6.0MHz 1db
               C                        0.3V p/p 75 ohm
                                        1.3MHz

OUTPUTS        COMPOSITE VIDEO          1V p/p 75 ohm BNC
               LOOP THROUGH VIDEO       1V p/p 75 ohm BNC
               (composite only models)

               Y-C
               Y                        1V p/p 75 ohm
               C                        0.3V p/p 75 ohm

@{" Return " link IMAGE}
@endnode

@node C_ACCESSORIES

2.1  ACCESSORIES SUPPLIED

COMPUTER-GENLOCK INTERFACE CABLE x 1

A one metre long computer to Genlock cable for connection of Amiga computer
and Neriki DeskTop Genlock.  2 and 3 metre cables may be ordered.

DEMONSTRATION DISKETTE x 1

Contains  this  Operation  Manual,  demonstration  programs  including  75%
saturated  PAL  colour  bars,  titles and graphics, a glossary of terms and
some usage hints.

NERIKI VIDEO TOOLS ON TAP SOFTWARE x 1

Video Tools On Tap (VTOT) offers many utilities and effects to help you get
the most from your Amiga desktop video projects.  VTOT is ARexx compatible,
fully multitasking, and may be accessed by mouse or hotkeys.  VTOT's hotkey
controls  may  be  customised to prevent clashing with your other software.
Please  see  VTOT's  included  manual  for  a  comprehensive description of
available  commands.   If  you have purchased your NERIKI second hand, VTOT
may  be purchased from Fordray.  See our address in the 'Note from Fordray'
page, accessible from the [C]ontents page of this document.

@{" Return " link IMAGE}
@endnode

@node C_CABLES
2.2  CONNECTING CABLES

COMPUTER CONNECTOR

Use  the  computer  to  Genlock interface cable supplied (length 1m) and NO
OTHER  CABLES,  to connect your Amiga and Genlock together.  Failure to use
the  supplied  computer  to  Genlock  interface  cable  may result in radio
frequency interference problems.

RGB MONITOR CONNECTOR

Use  the  standard  Amiga 23 pin 'D' type connector to scart (monitor plug)
cable supplied with your Amiga.  Use NO OTHER CABLES.  Other connectors are
BNC  type,  with  mini-din  for the use of Y-C only.  The monitor connector
will operate with 1084S style and multisync monitors.

@{" Return " link IMAGE}
@endnode

@node C_POWER
2.3  POWER REQUIREMENTS

Power Line Voltage.......AC 100-120/230-250V depending on model
                         100-120V AC
                         210-230V AC    to order
                         230-250V AC
Power Line Frequency.....48-62Hz
Power Consumption........14W

@{" Return " link IMAGE}
@endnode

@node C_INSTALREQ
2.4  INSTALLATION CONDITIONS

DO NOT install NERIKI Genlocks in any location subject to:

- Dust
- Vibration
- Strong magnetic or electric fields
- Prolonged direct exposure to sunlight
- Moisture

Installation space requirements:

Width          430mm
Depth          16mm (front) + 254mm (case) + 14mm (rear) = 284mm
Height         44mm

@{" Return " link IMAGE}
@endnode

@node C_GENERALINFO
3.1  GENERAL INFORMATION

Follow the suggestions below to ensure the long life of your Neriki DeskTop
Genlock.

Give  the  Genlock plenty of space for the circulation of air.  There are a
number  of  ventilation slots on the top of the Genlock which allow heat to
escape,  so  be  sure to leave them unobstructed.  Do not place anything on
the top of the Genlock, especially paper.

Be careful not to spill liquids onto or into the Genlock.

The  genlock can tolerate a wide temperature range, but do not let the unit
stand in direct sunlight.

The  unit  may  feel  warm  to the touch after it has been operating for an
extended period.  This is normal and will dissipate naturally.

@{" Return " link IMAGE}
@endnode

@node C_CLEANING
3.2  CLEANING

To  clean the unit, wipe over with a damp (not dripping) cloth.  Do not use
a cleaning liquid, spray or any other substance which could cause damage if
it should penetrate the unit.

@{" Return " link IMAGE}
@endnode

@node C_TROUBLE
3.3  TROUBLESHOOTING

If  the  Genlock  fails  to  operate  or  stops  working, try the solutions
outlined  below.   If  this  fails  to  rectify  the  problem, contact your
authorised dealer.


SYMPTOM:  The Power LED is not alight
PROBABLE CAUSE: Genlock is not getting power.
WHAT  TO DO:  Make sure the Genlock is turned on and that the power cord is
firmly  attached to both the Genlock and the wall outlet, and that the wall
switch is turned on.


SYMPTOM: Genlock is on, but no composite output
PROBABLE  CAUSE:   The Genlock is not receiving a reference sync source, or
there  is  no  connection from the VIDEO OUT/Y-C Out socket to the monitor.
WHAT  TO DO:  Check that a reference source is connected to the Genlock and
is switched on.  Check connection between VIDEO/Y-C OUT and monitor.


SYMPTOM: No computer video on composite output
PROBABLE  CAUSE:  The computer is incorrectly connected or not switched on,
or the EFFECT (Key Enable) switch is in the incorrect position.
WHAT  TO  DO:  Check that Genlock and computer are connected as outlined in
1.3.1  and 1.3.2.  Ensure that the equipment was switched on in the correct
order  as  outlined in 1.3.3.  Ensure that the EFFECT switch is in the DOWN
(Enable) position, and the DISSOLVE control knob is fully clockwise.


SYMPTOM: No RGB on Amiga Monitor
PROBABLE CAUSE: The monitor is incorrectly connected or not switched on.
WHAT  TO  DO:  Check connections as above.  Ensure RGB monitor is connected
correctly.


SYMPTOM: Computer image is not centred on the resulting Output.
PROBABLE CAUSE: Preferences have not been set.
WHAT  TO  DO:   Run Preferences from your Amiga Workbench screen (see Amiga
User's  Guide).   The  screen position gadget in the Preferences screen can
help with horizontal positioning.


SYMPTOM: Chroma adjustment has no effect
PROBABLE CAUSE: The BLACK/VIDEO switch is set to VIDEO.
WHAT  TO  DO:   Check  the  reference  video  source  and  ensure  that the
BLACK/VIDEO switch is set to the BLACK (up) position.


SYMPTOM: No output of reference video available from loop through BNC
PROBABLE CAUSE: The reference is not switched on and/or connected, or the
LOOP/TERMINATE switch is set to TERMINATE
WHAT  TO  DO:   Check  the  reference  video  source  and  ensure  that the
BLACK/VIDEO switch is in the LOOP (up) position.


@{" Return " link IMAGE}
@endnode
