Miranda DVI-Ramp2 User Manual

DVI-Ramp2

DVI-Ramp2 DSK

User’s Manual

M807-9900-202

26 Jul 2007

Miranda

Technologies Inc.

3499 Douglas-B.-Floreani

St-Laurent, Québec, Canada H4S 1Y6

Tel. [phone]
Fax. [phone]

www.miranda.com

© 2007 Miranda Technologies Inc.

Safety Compliance Information

Safety Compliance

This equipment complies with:

- CSA C22.2 No. 60950-1-03 / Safety of Information Technology Equipment, Including Electrical Business
Equipment.

- UL 60950-1 (1
Equipment.

- IEC 60950-1 (1st Edition) / Safety of Information Technology Equipment, Including Electrical Business
Equipment.

CAUTION

These servicing instructions are for use by qualified service personnel onl y. T o reduce the risk of electric
shock, do not
perform any servicing other than that contained in the operating instructions unless you are qualified to do
so. Refer all
servicing to qualified service personnel. Servicing should be done in a sta tic-free environment.

Electromagnetic Compatibility

- This equipment has been tested for verification of compliance with FCC Part 15, Subpart B, class A
requirements for Digital Devices.

- This equipment complies with the requirements of:
EN 55022 Class A, Electromagnetic Emissions,
EN 61000-3-2 & -3-3, Disturbance in Supply Systems
EN 61000-4-2, -3, -4, -5, -6, -8 & -11 Electromagnetic Immunity

CONTACT MIRANDA

For technical assistance, please contact the Miranda Technical support centre nearest you:

Americas

Telephone:

[phone]

e-mail:

[e-mail]

Visit our web site at www.miranda.com

st

Edition) / Safety of Information Technology Equipment, Including Electrical Business

Asia

Telephone:

[phone]

e-mail:

[e-mail]

Europe, Middle East,
Africa, UK

Telephone:

[phone]

e-mail:

[e-mail]

France (only)

Telephone:

[phone]

e-mail:

[e-mail]

DVI-Ramp2 / DVI-Ramp2 DSK

MIRANDA TECHNOLOGIES INC. (“MIRANDA”)

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DVI-Ramp2 / DVI-Ramp2 DSK

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DVI-Ramp2 / DVI-Ramp2 DSK

Table of Contents

1 DVI-Ramp2 Graphic to HD/SD Video Interface........................................................... 1

1.1 Introduction ..............................................................................................................................................1

1.2 Features...................................................................................................................................................1

1.3 Functional Block Diagrams ......................................................................................................................2

1.4 Front and Rear Panel views.....................................................................................................................4

1.5 Typical Applications .................................................................................................................................5

2 Installation..................................................................................................................... 8

2.1 Unpacking ................................................................................................................................................8

2.2 Mechanical Installation.............................................................................................................................8

2.3 Connections .............................................................................................................................................9

2.4 Control Interface.....................................................................................................................................10

3 Operation..................................................................................................................... 10

3.1 Powering Up...........................................................................................................................................10

3.2 Front Panel Indicators and Controls ......................................................................................................10

3.3 Synchronizing the DVI-Ramp2 and the graphics card ...........................................................................12

3.3.1 Frame sync (graphics card without reference)................................................................................12

3.3.2 Genlock (graphics card with reference)...........................................................................................13

3.4 DVI format considerations......................................................................................................................13

4 Technical Specifications ............................................................................................ 14

DVI-Ramp2 / DVI-Ramp2 DSK

DVI-Ramp2 / DVI-Ramp2 DSK

1 DVI-Ramp2 Graphic to HD/SD Video Interface

1.1 Introduction

Miranda’s DVI-Ramp2 performs live extraction of computer graphics to generate HD/SD video for post­production, broadcast and digital cinema. There are two models of the DVI-Ramp

1) Basic DVI-Ramp

2) DVI-Ramp

The DSK model adds an SD/HD SDI input with a bypass relay to the basic model. This additional input
serves the purpose of supplying a background channel for the built-in Keyer.
Unless specified otherwise, the term DVI-Ramp

This document is a very general description of the DVI-Ramp2.

• Please refer to www.miranda.com for updated information about new features that have been added
to this product since the release of this document.

The unit features many synchronization modes, including frame sync, genlock, and free run. Configuration
and control of the DVI-Ramp2 is via USB, RS-232 or Ethernet. Firmware upgrades are done throug h RS-232
or USB.

2

DSK

2

2

is used to describe both models.

1.2 Features

• Graphic to HD/SD video interface with the following operating modes:

1. Single Channel – Pixel-to-Pixel Extraction

2. Single Channel – Scaling Mode (future)

3. Dual Channel – Pixel-to-Pixel Extraction on each discrete channel

4. Dual Channel – Fill & Key using external Keyer or internal Keyer (DSK only)

• 3 synchronization modes

o Frame Synchronizer (graphics card without external reference)
o Genlock (graphics card with external reference)
o Free run

• Programmable color space conversion

• Platform/OS independent

2

:

DVI-Ramp2 / DVI-Ramp2 DSK | 1

1.3 Functional Block Diagrams

Figure 1.1a DVI-Ramp

2 | DVI-Ramp2 / DVI-Ramp2 DSK

2

Functional Block Diagram

Figure 1.1b DVI-Ramp

2

DSK Functional Block Diagram

DVI-Ramp2 / DVI-Ramp2 DSK | 3

1.4 Front and Rear Panel views

Figure 1-2a DVI-Ramp

2

Front and Rear panels

Figure 1-2b DVI-Ramp

4 | DVI-Ramp2 / DVI-Ramp2 DSK

2

DSK Front and Rear panels

1.5 Typical Applications

In this application, the DVI-Ramp2 extracts a video window from the DVI input and converts it (pixel-to-pixel)
to a video output. The highest quality is achieved by minimizing the processing done on the source images.
The HD/SD-SDI output can include the entire graphic image or a window within the image so that unwanted
graphic elements from the computer screen can be excluded.

For a clean presentation, the DVI-Ramp2 and the computer’s graphic card should be locked on the same
reference signal to achieve the highest quality.

For this application, the DVI-Ramp
third party software.

2

can be controlled by software available at www.miranda.com or by us ing

DVI-Ramp2 / DVI-Ramp2 DSK | 5

In this application, the DVI-Ramp

2

extracts two windows from the DVI source(s): a FILL window and a KEY
window (window-A is the FILL while window-B is the KEY). The FILL window is converted to an SD/HD SDI
"Foreground" output. The KEY window is converted to an SD/HD SDI "Alpha" output. These outputs with an
appropriate background signal can be fed to a downstream keyer.

For a clean presentation, the DVI-Ramp

2

and the computer’s graphic card should be locked on the same

reference signal to achieve the highest quality.
For this application, the DVI-Ramp

2

can be controlled by software available at www.miranda.com or by using

third party software.

6 | DVI-Ramp2 / DVI-Ramp2 DSK

Live application using internal keyer of DSK model (CG)

In this application, the DVI-Ramp

2

DSK extracts two windows from the DVI source(s) : a FILL window and a
KEY window (window-A is the FILL while window-B is the KEY). The internal keyer of the device generates
the video output by mixing the BACKGROUND (SD/HD SDI input) with the FILL image according to the KEY
signal. When the KEY signal is black, the keyer outputs the BACKGROUND image. When the KEY signal is
white, the keyer outputs the FILL image. With intermediate grey levels of the KEY signal, the keyer outputs a
weighted sum of the FILL and BACKGROUND. Through software, the mixing polarity can be inverted
(reverse interpretation of the black and white levels of the KEY signal).

In this application, the DVI-Ramp

2

DSK should be locked to the video input (BACKGROUND). For a clean
presentation, the computer’s graphics card should also be locked on the same re ference as the video input.

For this application, the DVI-Ramp

2

DSK can be controlled by software available at www.miranda.com or by

using third party software.

DVI-Ramp2 / DVI-Ramp2 DSK | 7

2 Installation

2.1 Unpacking

Make sure the following items have been shipped with your DVI-Ramp2. If any of the following items are
missing, contact your distributor or Miranda Technologies Inc.

- DVI-Ramp

- AC power cord

- Power supply (AC to 12V DC converter)

2.2 Mechanical Installation

The DVI-Ramp2 is packaged in a free-standing case with feet on the bottom, suitable for installation on a
desk or tabletop.

The DVI-Ramp
mounting.

2

unit

2

is sized so that two DVI-Ramp2 units can be installed side-by-side on a 1 RU tray for rack

Figure 2.1 Installing two DVI-Ramp

2

The rear panel of the DVI-Ramp

includes a threaded connection point for a mounting screw (left side of the
rear panel – see figure 2.2) so that the device can be securely mounted on the tray. The Miranda TRAY-120
is recommended, as it is configured to hold the DVI-Ramp

2

units on a 1 RU tray (TRAY-120)

2

case and incorporates a hole for the mounting

screw.

8 | DVI-Ramp2 / DVI-Ramp2 DSK

2.3 Connections

All inputs and outputs are located on the rear panel of the DVI-Ramp2. Signals and connector types are listed
below. The rear panel labels indicate the appropriate connection point for each signal.

Mounting

connection

screw

point

2

Figure 2.2a Rear panel and connectors of DVI-Ramp

screw

point

2

Figure 2.2b Rear panel and connectors of DVI-Ramp

DSK

Mounting

connection

Signal connections:
2 DVI inputs (DVI-D IN A and DVI-D IN B) (DVI connectors)

1 HD/SD reference input and passive loop-through (BNC connectors)
2 DVI outputs (DVI-D OUT A and DVI-D OUT B) (DVI connectors)
4 HD/SD SDI outputs (BNC connectors)
1 HD/SD SDI input (BNC connector for DSK model ONLY)

For optimum performance, high-quality DVI cables should be used. One recom mended cable model is
D-766 from Cable4PC (www.cable4pc.com)

Communication connections:
External control (10/100 Ethernet) (RJ-45 connector, implemented in future release)

External control (RS232/GPI) (RJ-45 connector)
External control (USB) (USB connector)

See section 1.5 for an example of how these inputs and outputs are connected i n a basic operating setup.

DVI-Ramp2 / DVI-Ramp2 DSK | 9

2.4 Control Interface

The DVI-Ramp
done using a software interface running on a computer connected to one of the three control ports.

Miranda has developed software for this purpose. The software and documentat ion can be downloaded from
Miranda’s website at www.miranda.com

Alternatively, users may create their own software. Programming documentation is available on demand.

Note: Connecting to an RS-232 device or network

2

has no local controls beyond the power switch and the Reset pushbutton. All adjustment is

. The software includes Context-Sensitive Help.

The "RS-232/GPI" RJ45 connector is used to preserve space on a busy panel while
accommodating RS-232 and GPI interfaces. The RS-232 interface specifies a DE-9S connector,
so if you are using this interface you may require a DE-9S-to-RJ45 adapter cable. The pin-out of
the "RS-232/GPI" connector is shown below:

DVI-Ramp 2Computer

RJ-45DE-9

18

1: GPI-IN2
2: GPI-OUT2

(also GPI-OUT2_GND)

pin 5: Ground

pin 3: TX out of computer
pin 2: RX into computer

3: GND
4: GPI-OUT1
5: GPI-OUT1_GND
6: GPI-IN1
7: DVI-Ramp2 RS-232_RX
8: DVI-Ramp2 RS-232_TX

Figure 2.3 RS-232 / GPI RJ45 connector pin-out

3 Operation

The DVI-Ramp2 has no local controls beyond the power switch and the reset pushbutton. Operational
concerns are outlined here, but for detailed operating instructions, see the documentation at

www.miranda.com

3.1 Powering Up

The power switch is located on the rear panel of the DVI-Ramp2, just above the power connector. Connect
the provided power supply to the power connector and set the switch to ON (I).

3.2 Front Panel Indicators and Controls

There are five Input Status LEDs which are mounted on the front edge of the DVI-Ramp2’s circuit board, and
which can be seen through holes in the front panel of the case. The DVI-Ramp
LED for the video input status.

.

2

DSK model has an extra

10 | DVI-Ramp2 / DVI-Ramp2 DSK

1 2 3 7 4 5 6

Status LEDs

1 DVI A GREEN when a valid input is detected on DVI-D IN A

RED when no valid input is detected on DVI-D IN A

2 DVI B When the DVI input mode is DUAL-HEAD mode (software configuration):

GREEN when a valid input is detected on DVI-D IN B

RED when no valid input is detected on DVI-D IN B
When the DVI input mode is DUAL-LINK or SINGLE-LINK (default):
OFF

3 REF GREEN when unit is genlocked on reference input

RED when unit is programmed to genlock on refe rence input but none is present. Unit is

then free-running

ORANGE – FLASHING when unit is programmed to genlock on reference input but wrong

format is detected. Unit is free-running.
GREEN-FLASHING when unit is programmed to be free-running but a valid reference

signal is present
ORANGE unit is programmed to be free-running and an unknown reference signa l is

present
OFF when unit is programmed to be free-running and no reference signal is prese nt

4 ETH OFF – no link

GREEN – link available (from PHY)

ORANGE FLASHING – transmitting (from PHY)

At power-up, this LED will be GREEN or OFF depending on whether a network is
connected.

6 USB/RS-232 OFF – No USB or RS-232

GREEN when USB is recognized by the PC or valid RS-232 is detected
ORANGE FLASHING when transmitting packets
ORANGE QUICK FLASH – heart-beat with USB or RS-232 connection available. This

indicates that firmware is in working order
RED QUICK FLASH – heart-beat with no USB or RS-232 connection available. This

indicates that firmware is in working order

At power-up, this LED is OFF

DVI-Ramp2 / DVI-Ramp2 DSK | 11

7 VIDEO This LED is only found on the DSK model.

GREEN when unit is genlocked on SD/HD SDI input
RED when unit is programmed to genlock on SD/HD SDI input but none is present. Unit is

then free-running

ORANGE – FLASHING when unit is programmed to genlo ck on SD/HD SDI input but

wrong format is detected. Unit is free-running.
GREEN-FLASHING when unit is programmed to be free-running but a valid SD/HD SDI

signal is detected
ORANGE unit is programmed to be free-running and an unknown SD/HD SDI signal is

present
OFF when unit is programmed to be free-running and no SD/HD SDI signal is detected

Controls

Only one control is provided at the front panel:

5 RESET button The RESET button is a dual-function control, and operates as follows:

• Quick push and release – resets the USB communication port.

• Push and hold for 5 seconds before releasing – copy the display settings to the

DVI-Ramp
display that is connected to its DVI output.

o Settings on "DVI-D OUT A" are copied to "DVI-D IN A"
o Settings on "DVI-D OUT B" are copied to "DVI-D IN B"

Use a bent paper clip or equivalent thin wire to activate the RESET button through

the hole in the front panel.

2

input. This ensures that the input of the DVI-Ramp2 will mimic the

3.3 Synchronizing the DVI-Ramp2 and the graphics card

The DVI-Ramp
relationship between the graphics card output and the video system is important in determining the success
of the transfer.

The DVI Ramp

2

processes the output of the computer graphics card and outputs a video signal. The timing

2

supports 2 different approaches to this situation:

3.3.1 Frame sync (graphics card without reference)

The graphics card is not synchronized with the video system. The DVI-Ramp
synchronizer, meaning that its input from the graphics card is buffered, and frames are repeated or drop ped
if the buffer underflows or overflows.

The frame-sync will drop frames when the DVI rate is larger than the SDI rate. Conversely, it will repeat
frames when the DVI rate is smaller than the SDI rate.

12 | DVI-Ramp2 / DVI-Ramp2 DSK

2

operates as a frame

3.3.2 Genlock (graphics card with reference)

Both the graphics card and the DVI-Ramp2 are locked to the video system timing reference. The buffer in the
DVI-Ramp

2

is replenished at the same rate as it is emptied, so there is never an underflow or overflow that
would trigger a discontinuity in the image content.

.

3.4 DVI format considerations

The format of the SDI output generated by the DVI-Ramp
on the use of the internal frame-sync function. Use the table below to select the appropriate DVI refresh rate
to achieve the desired output.

When the frame-sync function is OFF (Note 1), the following table of refresh rate compatibilities applies:

Desired SDI output format Recommended DVI frame rate (Hz)

SD-525 59.943
SD-625 503
1280x720@50p 50
1280x720@59.94p 59.94
1280x720@60p 60
1920x1080@23.98p 23.98
1920x1080@23.98PsF 47.953
1920x1080@24p 24
1920x1080@24PsF 483
1920x1080@25p 25
1920x1080@50i / 25PsF 503
1920x1080@59.94i 59.943
1920x1080@60i 603

NOTES:

1. When the frame-sync is OFF, the graphic card M UST be genlocked to the same reference as the
DVI-Ramp

2

. When the frame-sync function is ON, the DVI refresh rate can deviate from the

suggested one but will cause drop/repeat of frames at a rate proportional to the deviation.

2. For interlaced scan formats, the refresh rate is specified in terms of field rate. Thus, a refresh rate of

59.94 fields per second is specified as 59.94i.

3. When the recommended DVI frame rate is twice the SDI frame rate, each "source" frame conte nt
must be repeated. Example: with the DVI input as 1920x1080@59.94p and SDI output as
1920x1080@59.94i (frame rate @ 29.97 fps), the processing would be as follows:

DVI: frameA, frameA, frameB, frameB, … Æ DVI-Ramp Æ SDI: frameA, frameB, …

4. All supported DVI resolutions are progressive scan formats

2

depends on the refresh rate of its DVI input and

DVI-Ramp2 / DVI-Ramp2 DSK | 13

4 Technical Specifications

INPUT

DVI (x2)

SIGNAL: Digital Visual Interface (DVI Revision 1.0)
CONNECTORS: DVI-D. "DVI-D IN A" is DUAL-LINK whereas "DVI-D IN B" is SINGLE-LINK.

SD/HD SDI (x1 on DSK model only)
SIGNAL: SMPTE-259M-C (270Mbps) and SMPTE-292M (1.485, 1.485/1.001 Gbps)

FORMATS: SD 525 and 625 lines.
HD 1920x1080i @ 50, 59.94 and 60 fields per seconds
HD 1280x720p @ 50, 59.94 and 60 frames per seconds
RETURN LOSS: > 15 dB up to 1.5 GHz
CONNECTOR: 75 Ω BNC

REFERENCE INPUT (x1 with passive loop-through)

SIGNAL: SMPTE 170M/ITU 624-4 black burst (with no video content)
SMPTE 274M / SMPTE 296M Tri-Level Sync

RETURN LOSS: > 35 dB up to 5.75 MHz
CONNECTORS: 75 Ω BNC

OUTPUT

SD/HD SDI (x4)

SIGNAL: SMPTE 292M (1.485, 1.485/1.001 Gbps) and SMPTE-259-C (270 Mbps)
FORMATS: SD 525 and 625 lines.

HD 1920x1080i @ 50, 59.94 and 60 fields per seconds
HD 1920x1080psf @ 23.98 and 24 frames per seconds
HD 1920x1080p @ 23.98, 24 and 25 frames per seconds
HD 1280x720p @ 50, 59.94 and 60 frames per seconds

RETURN LOSS >15 dB up to 1.5 GHz
Except for output A1 of DSK model (through relay):
In bypass mode: > 12 dB up to 1.5 GHz
In active mode: 0 – 750 MHz: > 10 dB
750 – 1500 MHz: > 8 dB

JITTER SD: < 0.2 UI p-p wideband
HD: < 0.2 UI p-p above 100 KHz

OTHER

POWER 22 W @ 12V (Universal AC Adaptor supplied)
FORM FACTOR Standalone – half-width of standard 19” rack
1 RU high, 8 13/16” deep (224 mm) including BNC connectors

14 | DVI-Ramp2 / DVI-Ramp2 DSK