Crystal Vision CoCo104 User manual

Crystal Vision Ltd., Lion Technology Park, Station Road East, Whittlesford, Cambridge, CB22 4WL, England.
E-mail: [email protected] Website: www.crystalvision.tv Tel: [phone] Fax: [phone]
CoCo104
Colour corrector and legaliser

CoCo104 User Manual R2.0 Crystal Vision
126/09/05
Contents
1 Introduction 4
Processing modes 5
Soft limiting 5
2 Hardware installation 7
2.1 Rear modules and signal I/O 7
2.2 CoCo104 configuration 8
2.3 Using module GPIs 9
GPI connections 10
Setting node addresses 12
3 The CoCo Controller panel 13
3.1 Installing the Controller 13
Controller to frame remote wiring 14
3.2 Using the CoCo Controller for the first time 16
3.3 Controller operation 21
Selecting a CoCo board to control 21
The Menu functions 21
Changing YUV gains 22
Changing UV pedestal and chroma hue 23
Changing RGB pedestal 23
Changing picture crop 23
Changing delay and Y/C offset 24
Saving presets 24
Recalling presets 24
Set soft clipping and legal colour options 25
Set wipe/bypass options 27

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4 The CoCo Controller-48V 28
4.1 Installing the CoCo Controller-48V 28
Connecting supply cables 29
Controller to frame remote wiring 30
Using Controller GPIs 31
4.2 CoCo Controller-48V operation 32
Changing crosspoint assignments 33
Viewing crosspoint assignments 33
Multiple routing 33
Using salvos 33
5 Using the active front panel 35
5.1 Navigating the display 36
Sub-menus and data entry 37
5.2 The CoCo104 active panel menu structure 38
5.3 Configuring YUV processing 39
5.4 Configuring RGB processing 41
5.5 Timing 43
5.6 Miscellaneous 44
6Statesman 45
6.1 Statesman operation 46
Using colour space controls 47
Controlling YUV gain and lift 47
Controlling luminance clip threshold and slope 47
Controlling U/V threshold 48
Controlling chrominance levels 49
Controlling Video/RGB levels 50
Controlling RGB gain and lift 50
Controlling RGB clip threshold and slope 51
Adjusting picture crop 52
Changing video gamma 53

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Using presets 53
Using preview (wipe) mode 54
Enable YUV/RGB clipping 54
EDH generation 54
Board bypass 55
Recalling setup default values 55
7 Trouble shooting 56
8 Specification 58

Crystal Vision Introduction
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1 Introduction
CoCo104 is a 10 bit digital colour corrector and legaliser, which allows independent
digital image adjustments in YUV and RGB domains, essential for maintaining colour
fidelity. CoCo104 passes all ancillary data, including embedded audio, transparently. 16
memories are provided to store user-defined adjustments and there is GPI output
indication of YUV and RGB clip status.
CoCo104 colour corrector and legaliser
The main features are as follows:
Digital colour corrector and legaliser
Independent digital image adjustments in YUV and RGB domains
Tools to adjust level, gain, soft clipping and timing
All limiting has adjustable softness
Performs true colour correction using RGB lift and gain
Changes YUV colours illegal in RGB to be valid in RGB
Overall gamma and independent adjustment of red, green and blue gamma
Split-screen output to preview adjustments – AUX out only
Bypass control
Passes ancillary information
16 user memories
EDH generation
Control from dedicated 1U CoCo Controller, Statesman or active panel
CoCo104 is a 100mm x 266mm module, which fits in all of the standard frames and can
be integrated with any boards from the company’s full product range. It uses the RM01
rear connector.
The 4U Indigo 4 frame will house up to 24 modules and triple power supplies.
The 2U Indigo 2 or FR2AV frame will house up to 12 modules and dual power supplies.

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The 1U Indigo 1 or FR1AV frame will house six modules and a single power supply.
The 1U Indigo DT desk top box has a built-in power supply and will house up to two
modules.
On the 1U, 2U and 4U frames a hinged front panel gives access to the PSU and all
modules. The desk top box has a removable front. The universal frame wiring system
allows any of the interface range of modules to be fitted in any position with the use of
removable rear modules.
Applications include correcting computer-generated or post-production output and
ensuring broadcast colour gamut is always legal.
Processing modes
Advance/retard Y/C offset delay
Advance/retard overall horizontal delay (74ns increments)
Hue shift UV channels
Increase/decrease Y, U and V channel lift and gain independently
Set and soft limit Y channel positive (Hi) and negative (Lo) excursions
Set and soft limit U, and V channel positive/negative excursions symmetrically
Increase/decrease RGB channel lift and gain independently
Increase/decrease RGB gamma independently and together
Set and soft limit RGB channel positive excursions independently
Set horizontal and vertical active picture area cropping region on final output
Soft limiting
Soft limiting or clipping is provided by a combination of adjustable threshold and slope
controls. The luminance channel has both high and low limiting, whilst the UV and RGB
channels have one clipping control for each colour component. UV clipping operates
symmetrically about black level and RGB clipping is adjustable at the high level only.

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CoCo104 soft limiting
Note: Although there is no provision for an RGB lower clip adjustment, when RGB clipping is
enabled, excessive negative RGB excursions are automatically prevented.

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2 Hardware installation
The CoCo104 colour corrector and legaliser is a single height module which fits into all
Crystal Vision rack frames. All modules can be plugged in and removed while the frame
is powered without damage.
2.1 Rear modules and signal I/O
The CoCo104 module fits into all Crystal Vision rack frames. All modules can be
plugged in and removed while the frame is powered without damage.
CoCo104 is used with the RM01 single slot rear connector in all Crystal Vision frames.
The 4U Indigo 4 frame will house up to 24 modules and triple power supplies.
The 2U Indigo 2 or FR2AV frame will house up to 12 modules and dual power supplies.
The 1U Indigo 1 or FR1AV frame will house 6 modules and a single power supply.
The 1U Indigo DT desk top box has a built-in power supply and will house up to 2
modules.
On the 1U, 2U and 4U frames a hinged front panel gives access to the PSU and all
modules. The desk top box has a removable front. The universal frame wiring system
allows any of the interface range of modules to be fitted in any position with the use of
removable rear modules.
RM01 rear module connections:
RM01 fits in all current frames Description
RM01 (ZLA00227 artwork)
•24 modules per 4U frame, 12
per 2U frame, six per 1U
frame & two per desk top box
•All frame slots can be used
BNC Signal
AUX (2) Second auxiliary input
SDI IN SDI input
N/C Not used
MAIN(1) SDI output 1
MAIN(2) SDI output 2
AUX (1) First auxiliary input

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2.2 CoCo104 configuration
The jumper links on the board are set correctly when CoCo104 is tested before despatch and should be
left as set at the factory. The following information is for jumper position confirmation only.
J5
CoCo104 showing default factory jumpers
Link positions - board viewed as above
Link Required position
J8 & J9 Must be in the ON position
J2, J3, J5, J7 Must be in the SLOW position
J6 Leave jumper in place
J14 Leave in WDOG position
J1, J4, J16, J17 Leave all four jumpers in the right hand position to enable the CoCo Controller panel. Leave
in the left-hand position for GPI outputs
PL7 Selects GPI ‘e’ (IN/FADER/OUT) and GPI ‘f’ (IN/POWER/OUT) function – default is OUT
PA43/PA65 Not used

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2.3 Using module GPIs
Each slot has an associated set of GPI connections for remote control and external status
outputs on the frame rear-panel remote connectors. For convenience, GPI lines are
associated with reference codes ‘a’ to ‘f’ in the connector pin-out tables for each frame.
GPI lines can be used for either remote preset control or a second serial port for the CoCo
Controller panel. GPI lines ‘e’ and ‘f’ are reserved for an optional remote fader.
To enable GPI preset selection, ensure that the four jumpers J1, J4, J16 and J17 are all
positioned away from the edge connector.
The following table shows the binary weighted code required to recall presets 1 to 16
according to the state of GPI ‘e’. A ‘0’ is an open GPI input and a ‘1’ is a grounded GPI
input.
Recall Preset 12345678910 11 12 13 14 15 16
GPI ‘a’ 0101010101010101
GPI ‘b’ 0011001100110011
GPI ‘c’ 0000111100001111
GPI ‘d’ 0000000011111111
OPEN (+5V) GROUND
‘a’, ‘b’, ‘c’, ‘d’ See table above
‘e’ No action IN/FADER/OUT – depends on JP7
‘f’ No action IN/POWER/OUT – depends on JP7
GPI input assignment
GPI input connections have 10k Ωpull-up resistors to +5V. Closed-contact switches or
+5V to +24V logic levels can be used
GPI output connections (when provided) have 330Ωseries resistors fitted to drive LEDs
and 10k Ω pull-up to +5V (to drive a remote input).
Note: Jumpers PL 1, 4, 16 and 17 should be left in the left hand GPI position to enable normal
GPI operation and in the right hand position to enable RS485 comms for a CoCo
Controller.

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GPI connections
4U frame GPI Connections
GPI lines ‘a’ to ‘f’ of each card connect to 1 of 8 rear remote connectors as follows:
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
18 (1) 9 (1) 18 (1) 26 (1) 19 (2) 20 (2)
27 (1) 16 (1) 17 (1) 25 (1) 10 (2) 11 (2)
38 (3) 9 (3) 18 (3) 26 (3) 19 (4) 20 (4)
47 (3) 16 (3) 17 (3) 25 (3) 10 (4) 11 (4)
55 (1) 6 (1) 15 (1) 24 (1) 1 (2) 2 (2)
64 (1) 14 (1) 13 (1) 23 (1) 3 (2) 4 (2)
75 (3) 6 (3) 15 (3) 24 (3) 1 (4) 2 (4)
84 (3) 14 (3) 13 (3) 23 (3) 3 (4) 4 (4)
93 (1) 12 (1) 22 (1) 21 (1) 12 (2) 13 (2)
10 10 (1) 11 (1) 19 (1) 20 (1) 21 (2) 22 (2)
11 3 (3) 12 (3) 22 (3) 21 (3) 12 (4) 13 (4)
12 10 (3) 11 (3) 19 (3) 20 (3) 21 (4) 22 (4)
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
18 (5) 9 (5) 18 (5) 26 (5) 19 (6) 20 (6)
27 (5) 16 (5) 17 (5) 25 (5) 10 (6) 11 (6)
38 (7) 9 (7) 18 (7) 26 (7) 19 (8) 20 (8)
47 (7) 16 (7) 17 (7) 25 (7) 10 (8) 11 (8)
55 (5) 6 (5) 15 (5) 24 (5) 1 (6) 2 (6)
64 (5) 14 (5) 13 (5) 23 (5) 3 (6) 4 (6)
75 (7) 6 (7) 15 (7) 24 (7) 1 (8) 2 (8)
84 (7) 14 (7) 13 (7) 23 (7) 3 (8) 4 (8)
93 (5) 12 (5) 22 (5) 21 (5) 12 (6) 13 (6)
10 10 (5) 11 (5) 19 (5) 20 (5) 21 (6) 22 (6)
11 3 (7) 12 (7) 22 (7) 21 (7) 12 (8) 13 (8)
12 10 (7) 11 (7) 19 (7) 20 (7) 21 (8) 22 (8)
Note: Remote 1, remote 3, remote 5 and remote 7 are 26-way high density D-Type female
sockets and frame ground is pin 2 and +5V @500mA is pin 1 in each case.
Remote 2 and remote 4 are 26-way high density D-Type male plugs and frame ground is
pin 6 and +5V @500mA is pin 15 in each case.
UpperLower

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2U frame GPI Connections
GPI lines ‘a’ to ‘f’ of each card connect to 1 of 4 rear remote connectors as follows:
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
18 (1) 9 (1) 18 (1) 26 (1) 19 (2) 20 (2)
27 (1) 16 (1) 17 (1) 25 (1) 10 (2) 11 (2)
38 (3) 9 (3) 18 (3) 26 (3) 19 (4) 20 (4)
47 (3) 16 (3) 17 (3) 25 (3) 10 (4) 11 (4)
55 (1) 6 (1) 15 (1) 24 (1) 1 (2) 2 (2)
64 (1) 14 (1) 13 (1) 23 (1) 3 (2) 4 (2)
75 (3) 6 (3) 15 (3) 24 (3) 1 (4) 2 (4)
84 (3) 14 (3) 13 (3) 23 (3) 3 (4) 4 (4)
93 (1) 12 (1) 22 (1) 21 (1) 12 (2) 13 (2)
10 10 (1) 11 (1) 19 (1) 20 (1) 21 (2) 22 (2)
11 3 (3) 12 (3) 22 (3) 21 (3) 12 (4) 13 (4)
12 10 (3) 11 (3) 19 (3) 20 (3) 21 (4) 22 (4)
Table shows pin number (remote number)
Note: Remote 1 and remote 3 are 26-way high density D-Type female sockets and frame
ground is pin 2 and +5V @500mA is pin 1 in each case.
Remote 2 and remote 4 are 26-way high density D-Type male plugs and frame ground is
pin 6 and +5V @500mA is pin 15 in each case.
1U frame GPI connections
GPI lines ‘a’ to ‘f’ of each card connect to 1 of 2 rear remote connectors as follows:
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
18 (1) 9 (1) 18 (1) 26 (1) 19 (2) 20 (2)
27 (1) 16 (1) 17 (1) 25 (1) 10 (2) 11 (2)
35 (1) 6 (1) 15 (1) 24 (1) 1 (2) 2 (2)
44 (1) 14 (1) 13 (1) 23 (1) 3 (2) 4 (2)
53 (1) 12 (1) 22 (1) 21 (1) 12 (2) 13 (2)
610 (1) 11 (1) 19 (1) 20 (1) 21 (2) 22 (2)
Table shows pin number (remote number)
Note: Remote 1: 26-way high density D-Type socket. Frame ground is pin 2 and +5V @500mA is
pin 1.
Remote 2: 26-way high density D-Type plug. Frame ground is pin 6 and +5V @500mA
is pin 15.

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DTB-AV desk top box GPI connections
GPI lines ‘a’ to ‘f’ of each card connect to the rear remote connector as follows:
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
1123456
291011121314
Note: Remote connector is 15-way normal density D-Type socket. Frame ground is pin 15.
Indigo DT desk top box GPI connections
GPI lines ‘a’ to ‘f’ of each card connect to the rear remote connector as follows:
Slot no. ‘a’ pin ‘b’ pin ‘c’ pin ‘d’ pin ‘e’ pin ‘f’ pin
18 (1) 9 (1) 18 (1) 26 (1) 19 (2) 20 (2)
27 (1) 16 (1) 17 (1) 25 (1) 10 (2) 11 (2)
Note: Remote 1: 26-way high density D-Type socket. Frame ground is pin 2 and +5V @500mA is
pin 1.
Remote 2: 26-way high density D-Type plug. Frame ground is pin 6 and +5V @500mA
is pin 15.
The modules can be plugged in and removed while the frame is powered without damage.
The AADA416FR is used with the RM17 single slot rear connector which allows up to 12
such modules, in any mix in a 2U frame.
Other Crystal Vision rear modules and interface cards can be mixed in any quantity with
AADA416FR cards, up to a maximum of 12 cards, providing the other cards do not
exceed the power rating of the PSU chosen (normally 150W).
Setting node addresses
In current 2U frames the node address is calculated in one of two ways:
•slot number minus 1 – giving a range of 0 - 11 in frame #1, OR
•slot number plus fifteen – giving a range of 16 – 27 in frame #2
The two ranges are provided to allow one control panel to control two frames.
Note: The node switch SW2 should be set to ZERO and jumper J15 should not be fitted in all
current frames.
Node addresses in older frames are set as follows:
Frame Node address setting
FR1-6
FR2-12
FR2-8
Set the remote node address in conjunction with link J15 as follows:
J15 pins 1 & 2 open – SW2 sets node addresses from 0 to 15
J15 across pins 1 & 2 – SW2 sets node addresses from 16 to 31 (16 is added to switch setting)
The node address setting is only read on power up

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3 The CoCo Controller panel
The CoCo Controller panel is designed to control the CoCo104 10 bit digital colour
corrector using a RS422 serial link. The controller can handle up to 12 CoCo104s and has
dedicated shaft encoders for main adjustments such as video gain, chroma gain, black
level, RGB gain and gamma. There are also dedicated buttons for common menus and a
built-in display.
The CoCo Controller panel
3.1 Installing the Controller
The CoCo104 has a number of external control lines that can be configured for GPI or
RS485 control. These control lines MUST be configured for RS485 to enable Controller
communication as explained in section 5.2. It is NOT possible to retain GPI preset control
when the controller panel is enabled.
The panel communicates with Crystal Vision frames via a serial communication link
using the 422 Bus port at the rear of the panel. Standard UTP patch cables may be used
with an appropriate adapter for the Crystal Vision frame remote connector.
Controller panel – rear view
The RJ45 422 BUS port is next to the GPI I/O connector. Other RJ45 connectors and the
four-way DIP switch are NOT used.
Each card slot in a frame has its control lines brought out to different 26-way D-Type
frame remote connectors on the rear of the frame. The following tables show which
remote connectors to use for different frames and frame slots:

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CoCo104 card slots and frame remote connectors
Slot No.:- S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12
Indigo 4U frame R1 R1 R3 R3 R1 R1 R3 R3 R1 R1 R3 R3
Indigo 2U frame R1 R1 R3 R3 R1 R1 R3 R3 R1 R1 R3 R3
Indigo 1U frame R1 R1 R1 R1 R1 R1 - - - - - -
Indigo DT desk top box R1R1----------
Slot No.:- S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24
Indigo 4U frame R5 R5 R7 R7 R5 R5 R7 R7 R5 R5 R7 R7
Indigo 2U frame ------------
Indigo 1U frame ------------
Indigo DT desk top box ------------
The appropriate remote connector(s) should be connected to the 422 Bus connector at the
rear of the panel using an adapter as explained in the next section.
Note: The second serial port on CoCo104 is used for Controller communications allowing front
panel and Statesman control at the same time as Controller access.
Panel GPI I/O is not yet assigned.
Controller to frame remote wiring
The connection from the control panel to the appropriate frame remote connector has a
cable with a D-Type plug at one end and an RJ45 connector at the other.
It is suggested that a short adaptor cable be made with a standard RJ45 patch lead and an
in-line coupler used to make the required overall cable length.
Controller panel to frame adaptor and CAT5 patch lead

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CAT5
Colour
RJ45 plug S1/R1
S3/R3
S2/R1
S4/R3
S5/R1
S7/R3
S6/R1
S8/R3
S9/R1
S11/R3
S10/R1
S12/R3
Shell (GND) 6/Shell 6/Shell 6/Shell 6/Shell 6/Shell 6/Shell
Brown 8 87543 10
W/Brown 79 16 6 14 12 11
Blue 4 1817151322 19
W/Blue 526 25 24 23 21 20
The following tables show how the required panel to frame adapters should be wired.
Indigo 4U frame Remote 1
RJ45 Slot 1 Slot 2 Slot 5 Slot 6 Slot 9 Slot 10
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo 4U frame Remote 3
RJ45 Slot 3 Slot 4 Slot 7 Slot 8 Slot 11 Slot 12
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo 4U frame Remote 5
RJ45 Slot 13 Slot 14 Slot 17 Slot 18 Slot 21 Slot 22
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo 4U frame Remote 7
RJ45 Slot 15 Slot 16 Slot 19 Slot 20 Slot 23 Slot 24
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20

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Indigo 2U frame Remote 1
RJ45 Slot 1 Slot 2 Slot 5 Slot 6 Slot 9 Slot 10
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo 2U frame Remote 3
RJ45 Slot 3 Slot 4 Slot 7 Slot 8 Slot 11 Slot 12
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo 1U frame Remote 1
RJ45 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6
Pin 8 Pin 8 Pin 7 Pin 5 Pin 4 Pin 3 Pin 10
Pin 7 Pin 9 Pin 16 Pin 6 Pin 14 Pin 12 Pin 11
Pin 4 Pin 18 Pin 17 Pin 15 Pin 13 Pin 22 Pin 19
Pin 5 Pin 26 Pin 25 Pin 24 Pin 23 Pin 21 Pin 20
Indigo DT desk top box Remote 1
RJ45 Slot 1 Slot 2
Pin 8 Pin 8 Pin 7
Pin 7 Pin 9 Pin 16
Pin 4 Pin 18 Pin 17
Pin 5 Pin 26 Pin 25
Note: The RJ45 connector at the rear of Indigo frames should not be used to connect controller
panels.
To ensure continued EMC compliance it is recommended to use high quality shielded twin
pair cable for RS422 cabling.
For the panel to work jumper links PL4-PL7 need to be fitted towards the rear of the
CoCo104 board as explained in section 6.5 This will disable GPI preset control for the
CoCo104 module.
3.2 Using the CoCo Controller for the first time
To use the CoCo Controller proceed as follows:
Connect the CoCo Controller panel to a Crystal Vision frame with a CoCo104
module installed as explained in the previous section
Power the controller panel - the panel will automatically search for a CoCo module

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CoCo Controller panel
Searching mode
The panel indicates that it is in searching mode by displaying a search progress bar in the
display below a text message: ‘No reply – retrying (nn)’, where ‘nn’ is the number of
tries. Button presses will have no effect whilst searching.
The panel will remain in searching mode until it has established communications with a
CoCo104 board. If communication is lost, it will return to searching mode.
Selecting a CoCo104
The available CoCo104s that have responded are shown on the lower line of the display
together with their slot numbers in the connected frame. If necessary press the DEVICE
key to display more CoCo boards (up to 12). Use the function key below the desired
CoCo board to establish control.
The DEVICE key can be pressed at any time to display the connected CoCo boards, press
again to show more CoCo boards.
Using direct action rotary controls
The seven rotary controls on the right hand side of the controller panel each have
dedicated functions.
CoCo Controller panel – dedicated video controls
Each control or group of controls is also associated with a menu display that will
automatically follow the last control used.
For example, if the VIDEO knob is altered, the menu will show:

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CoCo Controller panel – display menu
Where ‘vv’ is the overall video gain from 0 to 200, ‘yy’ is the chroma gain from 0 to 200
and ‘zz’ is the black level from -512 to +512.
If the CHROMA or BLACK knobs are altered, the control name text in the menu will be
highlighted by changing to capital letters.
To quickly return the highlighted variable to its default value, press the CAL button.
The following functions have dedicated rotary controls:
Control Range Description
VIDEO 0 - 200 Overall YUV gain – retains individual YUV gain offsets in proportion
CHROMA 0 - 200 Overall UV gain – retains individual UV gain offsets in proportion
BLACK -512 - +512 Black level or lift
RED, GREEN, BLUE0 - 200 Individual RGB component gain
Gamma 0.5 – 2.0 Overall RGB gamma
Wipe Continuous Variable split screen between input and output (Aux out only when enabled)
Note: Overall video and chroma control range may be less than 0-200 if any YUV component gains
have been altered.
Using panel menus
The menu display is associated with four assignable buttons and an assignable rotary
control under the CAL button. When active, their associated LED will be lit.
For example, if the YUV GAIN button is pressed the following menu is displayed:
CoCo Controller panel – YUV GAIN display menu
In the example above, the programmable rotary control is assigned to control Y gain as
indicated by the fact that ‘Y’ is capitalised.
The Y gain can now be adjusted over its available range. If necessary the CAL button can
be pressed to return quickly to its default value.

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The following control menus are supported:
Control Description
DEVICE Show and/or search for connected CoCos
YUV GAIN Adjust individual YUV gains/gain ratios
MENU Accesses GPI On/Off, EDH On/Off, Device Label, Copy/Paste, ENG and Lock-
Panel sub-menus
SAVE Save selected CoCo setup into temporary memory
RECALL Recall panel setup from temporary memory to connected CoCo
UV PED/HUE Adjust UV lift/pedestal and/or hue
CROP Adjust vertical and horizontal crop
RGB PED Adjust RGB lift/pedestal and/or hue
TIMING Adjust horizontal delay and Y/C offset
WIPE/BYPASS Set horizontal/vertical preview wipe and/or board bypass
LEGAL Set RGB clipping On/Off and adjust RGB/YUV clipping threshold and slope
Note: Yellow LEDs indicate when function buttons (F1 to F4) and the menu assignable shaft
encoder (under the CAL button) are active. The display always follows the last button or
menu accessed.
The following buttons are associated with panel menus and more advanced functions:
CoCo Controller panel – advanced control buttons
Each of these functions is discussed in detail in the controller operation section.
Using the split-screen (wipe) preview
The two AUX outputs are provided with the facility to perform a ‘before/after’
comparison of the corrections applied by CoCo104.
To use this facility, connect one of the AUX outputs to a monitor and press the
WIPE/BYPASS button.