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2–2 • Configuration CrossOver 6 / 12 User Manual (v1.4)

Ô Format Conversion and Frame Sync

The switcher has four input format converter / frame

synchronizer (FCFS) channels that can be used for

the following:

• Converting incoming video to the current switcher

video format. The format converters can convert

input video from many formats to the current

switcher video format according to Table 2.1

• Correcting mis-timed or drifting input signals in

any of the supported video formats. The frame

synchronizers can not completely correct badly

formatted video streams, mis-timed switches,

signal dropouts, or similar issues..

Assigning FCFS channels

FCFS channels are assigned to either specific inputs

or bus-pairs. Each bus-pair requires two FCFS

channels. The bus pairs are as follows:

• PGM – Preset buses

• Key 1 Video – Key 1 Alpha buses

• Key 2 Video – Key 2 Alpha buses

• Key 3 Video – Key 3 Alpha buses

• Key 4 Video – Key 4 Alpha buses

• Aux 1 – not paired

• Aux 2 – not paired

• Aux 3 – not paired.

Note:

• Using an FCFS channel creates a one frame delay

for the input video being processed.

To assign an FCFS channel:

1. Press MENU.

2. Press the REF Wipe Pattern button.

3. Press NEXT until Fcfs is displayed.

4. Use the Fcfs knob to select the FCFS channel

you wish to assign.

5. Press the Fcfs knob to display the FCFS menu.

6. Use the Fcfs1-4 knob to assign the FCFS

channel. You can choose from the following:

• Off — The FCFS channel is not assigned.

• Input — The FCFS channel is assigned to a

single input.

• Bus — The FCFS channel is assigned to all

inputs on a specific bus.

Configuring FCFS Channel Modes

Once an FCFS channel has been assigned, you must

configure the conversion behavior depending on the

mode you set the FCFS channel to.

To configure an FCFS channel set to Input mode:

1. Assign an FCFS channel to a specific input.

2. Use the Input knob to select which input the

FCFS channel is assigned to.

3. Use the Aspect knob to set the aspect ratio

conversion mode. You can choose from the

following:

• Full — The video signal is scaled

disproportionately to fill the display of the

new aspect ratio. Aspect distortion occurs as

Table 2.1 Format Conversions

Switcher Video

Format

Allowable Input Formats

1080i / 59.94Hz 480i, 720p / 59.94Hz

1080i / 50Hz 576i, 720p / 50Hz

720p / 59.94Hz –

720p / 50Hz –

480i / 59.94Hz 480i (aspect ratio conversion), 720p,

1080i / 59.94Hz

576i / 50Hz 576i (aspect ratio conversion), 720p,

1080i / 50Hz

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