Extron electronics VSC 75 User Manual download pdf (Page 8)

VSC 75 Installation and Operation

Installation and Operation, cont’d

2-5

controls. Adjustments can still be made via RS-232

control when executive mode is active.

Test button and LED — Press this button to display a

color bar test pattern on the output devices. The test

indicator LED lights while this control is active. The

test pattern continues to be displayed until you press

the Test button again.

This LED lights to indicate that the test feature is

active.

Flicker filter button — Press this button to choose

one of the two levels of vertical filtering. Select the

setting that yields the least amount of flicker.

Flicker filter LEDs — These LEDs light yellow to

indicate the selected level of vertical filtering.

Size button and LED — Press this button to activate

the size feature. When Size is active, the picture can

be resized vertically and/or horizontally by rotating

the vertical and horizontal Centering/Pan/Size

rotary controls (10). Observe the picture on screen as

you adjust the controls. To zoom in, adjust the size

so the picture exceeds the screen’s limits. The Min/

Max LED (11) lights red when the minimum or

maximum limit of a control has been reached.

The LED lights green to indicate that the size feature

is active.

The size feature affects both display outputs

simultaneously. The local monitor loop-out is not

affected.

The size feature remains active for 8 seconds after the

rotary controls become inactive. The rotary controls

then default to the standard centering and pan

functions. To turn the size feature off, press the Size

button again.

See Freeze button (2) for information on using

executive mode.

Vertical ( ) and horizontal ( ) Centering/Pan/Size

rotary controls — Turn these knobs to adjust vertical

or horizontal centering (when the image size does

not exceed the screen size) and panning (when the

image size exceeds the screen size) in the regular

mode. Rotate these controls to adjust picture size

when the size feature is active.

2-4

Front Panel Features

Figure 3 — VSC 75 front panel

Adjustments to front panel features and controls do

not affect the local monitor.

Power/signal lock LED — If this indicator...

• Lights amber yellow without blinking, the VSC 75

is receiving power, but no input signal is present.

• Blinks green, the unit is receiving power, but the

input signal has a resolution that is too low or

too high.

• Lights green without blinking, the input signal is

within range, and the VSC 75 has locked to that

particular resolution.

Freeze button and LED — Press this button to

display (or record) a still image of the scan-converted

picture from both display outputs. The freeze

indicator LED lights while this control is active. To

turn this feature off, press the Freeze button again.

Freeze affects both outputs simultaneously. The

image on the local monitor will not be frozen.

The LED lights to indicate that the freeze feature is

active.

All controls except Freeze will be locked on the front

panel while freeze mode is active. Press the Freeze

button again to turn off freeze mode and unlock the

other controls.

Executive mode release (Freeze + Size) — Press

the Freeze button and the Size button

simultaneously for 2 seconds to release executive

mode. Executive mode, which can be activated only

by issuing an RS-232 command (see page 3-5),

prevents unauthorized or accidental adjustments to

the VSC 75’s settings via front panel controls by

locking all the front panel features except centering

MIN/

MAX

FREEZE TEST SIZE

FLICKER

FILTER

VSC 75

SCAN CONVERTER

CENTERING/PAN SIZE

2 3

7 8

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 18 19

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Extron electronics VSC 75 User Manual Page 8

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