F50

Multichannel Synchronization Technical Guide

601–0384–00/00

05/02/2016

Barco Fredrikstad AS

Habornveien 53, N-1630 Gamle Fredrikstad, Norway

Phone: +47 6930 4550

Fax: +47 6930 4580

Support: Support.[email protected]

Scope, audience and limitations

This technical guide is written prim arily as an aid for professional working with projector installation and s ystem integration. The

authors assume a significant degree of technical knowledge and exp erience by and from readers.

The objective of this guide is to describe the main functionality and parameters of the projector when setting u p a 2D or active

stereoscopic 3D (AS3D) multichannel ins tallation.

Technical specifications and installation conditions are given in the projector user guide, which is ava

ilable for download from the

manufacturer’s webs ite.

About this chapter

• Synchronization bes t pr actice

• Synchronization concept for the F50

• The Installation — Sy nchronization men u

• Synchronization m enu 2D

• Synchronization m enu 3D

• Troubleshoot source sync issues

601–0384–00 F50 05/02/2016

• Use projec tors and lenses that are of the same m ake, age and m odel

Wherever possible, synchronization in multi-channel installations should be done at the image g enerator (IG) level rather than at the

projector level.

Consider the setup shown in . This is a typical dual head setup where each projector channel is driven by two individual Image

Generators (IG). T he problem is that the IG are not in sync with each other. E ach projector will synchronize its projected image with

the DP1 input. Frame rate conversion will be applied to the other input as necessary, but the two projectors will not be in sync with

each other.

General

The F50 is equipped with bidirectional sync inputs. The projector has a total of three such connectors, 2 BNC and one DIN . All three

as glass sync emitters.

The synchronization m enu, Main m enu — Installation — Synchronization, is divided in two parts: the top part is used for 2D setups

For example, to u se SYN C 1 for 2D source synchronization, you set the 2D source sy nchronization menu to SYNC 1. This has

precedence, so the c onnector will now be configured as an input and the signal her e is now used for 2D s ource synchronization.

Further down the m enu is the option to d efine what signal is sent out on the individual sync connectors, as long as they are not used

for source or display synchronization.

Troubleshooting multichannel synchronization issu es can be done using the Status menu. S ee section "Troubleshoot source sync

issues", page 1 0 for more information.

601–0384–00 F50 05/02/2016

The synchronization m enu, Main m enu — Installation — Synchronization, is divided in two parts: the top part is used for 2D setups

information on AS3D installations, see "Stereoscopic multichannel setup", page 13.

2D Sync 1

This menu option is used to select which signal the Sync 1 connector shall send out.

2D Sync 3

This menu option is used to select which signal the Sync 1 connector shall send out.

The F50 supports four different 3D modes : frame sequential, side-by-side, dual-head 3D and embedded 3D formats defined for

When the source has 3D signal information embedded in the signal the projector will automatically switch to 3D and pr ocess the

signal correctly. This will happen regardless of the 3D m enu setting. When the signal doesn’t include 3D information, the user

manually chooses the 3D m ode in the menu that m atches the setup.

eye frame. To e nsure that the projector ch ooses the c orrect frames as the left eye and right eye frames, a 3D sync signal should

there is no need to synchronize the signal input in this mode.

head 3D source 2 as right eye. Note that not all source combinations are poss ible. The projector will use source 1 to synchronize

the input. If the two input sources are not sync hronous image artifacts will occur. The projector is only cap able of displaying up to

120 Hz output, therefore it do es not make sense to have individual sources faster than 60 Hz in this mode.

For so u rce s with embedded HDMI 3D signals the projector will a utomatically switch to 3D and process the signal correctly. The

projector will do so re gardless of the 3D m ode menu s etting. This o p tion is not visible in the 3D mode menu.

14

General

System complexity is naturally increase when the installation consists of multiple cha nnels. If the s ystem is not de signed correctly

all. A very important aspect of planning any m ulti-channel installation is how to synchronize the projected channels.

sync with each other. E ach projector will synchronize its projected

image with one of the DVI inputs. Frame rate conversion will be applied to the other input as neces sary b ut the tw o projectors will

not be in sync with each other. T he preferred way to synchronize the projected images is to synchronize the IG . T his is the only w ay

all image artifacts may be eliminated from the resul

ting im age a nd is true for all projector brands; not only B arco projectors. If, for

some reason, one chooses to have asynchronous IG then extra synchronization must be performed by the projectors and while an

excellent 3D exp erience is obtained this way, there will be mo tion artifacts in the resulting image. Troubleshooting AS3D multichannel

installation issues, and in particular source

synchronization issues, ca n be done using the Status menu. See "Troubleshoot source

sync issues", page 10 for more information.

right eye frame. For sources up to 120 Hz .

input frame is used as the right eye output frame. For sources up to 60 Hz.

User s elects the input sources for left and right eye manually. For sources up to 60 Hz . See

next section for m ore information.

Dual head setup

This menu option allows the user to select left eye and right eye input sources. Some combinations are not possible, see matrix

below for more information:

✔✔

✔✔✔

✔✔

✔✔✔

✔✔✔✔

✖✖

✔✔✔

✔✔✔✔✔

✔✔✔✔✔

✔✔

Some shutter glasses may need the synchronization pu lse to be shifted in time to correct ghosting oc curring between the left and

the right eye.

This men u option enables the user to set this delay (0–359°) in increments of 1°.

In this setup, the I G are synchronized and the 3D sync from the source is connected from the DIN connec tor on the IG to the SYNC

1 connector. This signal is then sent to the next projector in the setup out on the SYN C 2 connector. A typical synchronous fram e

sequential 3D setup is illustrated in image 3-2.

The table below s hows the recommended settings for s ynchronous frame sequential 3D.

The projector is capable of displaying asynchronous frame sequential 3D. For this mod e, a lot of synchronization signals m ust be

used. This is the most com plex 3D setup the F50 can handle.

its output to; this is usually the same as the s ource input on the first projector. T he first projector sends its display sync to the second

ector 2 will show Drifting, Frame locked m eaning that the display

sync signal is asynchronous w ith the input source.