Marantz VP-12S3 Especificações descarregar pdf (Página 3)

Auto Adjust determines the Size, Position and

Phase settings automatically for analog RGB

signals. The Config submenu includes Auto

Power Off, OSD Position, Language (6 choices),

Ceiling (mount) (On/Off), Rear (projection)

(On/Off), Color Temp Calibration, Reset Lamp

Life, and Reset All. The Trigger 2 submenu

selects the Aspect Ratios that enable the

12V Trigger 2 output terminal.

The Preset submenu selects the Picture

Mode (Theater, Standard, Dynamic, User

A/B/C), Index (1, 2, 3, Default), and Gamma

(A, B, C, D, E, a, b, c). The Gamma setting can

only be selected for the User picture modes.

Lamp Mode

The Lamp mode selects the brightness of

projection lamp. This is one of the quietest

projectors I have measured. In the High Lamp

mode, the fan noise measured only 51 dB,

C-weighted at 12 inches from the front

(exhaust side) of the projector. The noise level

dropped below the 50 dB sensitivity of my

sound level meter in the Low Lamp mode.

Picture Modes

Each of the six picture modes (Theater,

Standard, Dynamic, User A/B/C) stores

three sets (Index 1-3) of Picture Adjust set-

tings and a gamma mode. These are global

settings that can be used with any input.

When an input is switched, the picture

mode and index last used with that input

are restored.

Gamma

There are eight preset gamma curves

(A-E, a-c). The gamma curves for the

Theater, Standard, and Dynamic picture

modes are ‘a’, ‘b,’ and ‘c’ respectively. Any

of the eight gamma curves can be selected

for the User picture modes.

The ‘A’ and ‘B’ gamma curve values are

relatively constant (about 1.62 and 1.73

respectively) from 10-60 IRE and then fall

off at higher signal levels. The ‘C’, ‘D,’ and

‘E’ gamma curve values rise below 20 IRE

(to about 2.02, 2.09, and 2.11 at 10 IRE)

and are relatively constant (about 1.85,

1.75, and 1.85) to about 70 IRE before

falling off. Therefore, dark image areas

appear darker as the gamma changes from

‘A’ to ‘E.’ The ‘a’ curve is much like ‘A’

(about 1.64) with a slight gamma increase

at the dark end. The ‘b’ curve is relatively

flat with an average gamma of about 1.83,

and the ‘c’ curve is nearly the same as ‘C’

without falling off at the bright end.

These are all unusually low gamma val-

ues. A display gamma of 2.2 is required to

produce a system gamma of 1.0, and as

I’ve indicated in previous reviews a system

gamma of 1.1 to 1.2 is advantageous when

viewing a picture with a dark surround. That

requires a display gamma of 2.45 to 2.67. I

prefer a display gamma of about 2.5.

On this projector I preferred the ‘c’

gamma curve even though ‘E’ had a higher

gamma at 10 IRE. I wasn’t sure why until I

realized that the brightest parts of the pic-

ture (above 70 IRE) were compressed (too

bright) because the gamma falls off at the

top of the ‘E’ curve. That bothered me more

than the additional brightness at the dark

end of the gamma curve, which makes

shadow details more visible, but leaves

some images a bit flat with too little contrast.

There are no controls to modify the pre-

set gamma curves, but the manual men-

tions that special PC software can be used

to create custom curves. That software was

not available at time of the review.

Aspect Ratios

There are four Aspect (ratio) Modes—

Full, Normal, Zoom, and Through. The Full

mode is used to display 16:9 sources—

HDTV (720p/1080i) and 16:9 (anamorphic)

DVDs. The Normal mode is used to correct-

ly display full frame 4:3 (1.33:1) pictures in

the center of a 16:9 screen with black side-

bars. The Zoom mode is used to display 4:3

letterboxed pictures by expanding the

image proportionally in the vertical and hori-

zontal directions to fill the width of the

screen. The Through mode displays any for-

mat with less than 720 vertical lines (or pix-

els) in its native pixel resolution without

scaling the image. There is no mode to non-

linearly stretch a 4:3 image to fill the screen.

Gray Scale

A custom color analyzer pod is included

to automatically calibrate the projector’s

grayscale. The color analyzer pod snaps

over the lens like a lens cap, and has a

cable that plugs into the RS-232 port on the

projector’s rear panel. To perform an auto-

matic calibration the user only needs to ini-

tialize the sensor, center the lens shift

adjustment, snap the color analyzer over

the lens, and press a button. About 5 min-

utes later the process is complete.

After running the auto calibration I meas-

ured a gray scale of 6601K +267/-8K from

20-100 IRE. There was a 5-8 dE (delta-E)

deviation from D65 (x = 0.3127, y = 0.329)

over that range. The color temperature

increased to 7408K at 10 IRE with a dE of 17.

I manually calibrated the Color

Temperature and gray scale tracking to

match D65 using the red, green, and blue

Contrast (gain) and Bright (offset) adjust-

ments in the Fine Picture menu. The manu-

ally calibrated gray scale measured 6500K

+47/-49K from 20-100 IRE, and 6702 at 10

IRE. More importantly, the gray scale devia-

tion from D65 measured just 0-2 dE from

20-100 IRE, and 4 dE at 10 IRE.

Black Level And

Contrast Ratio

An AccuPel HDG-3000 Calibration gen-

erator (www.accupel.com) was used to gen-

erate test patterns for measuring grayscale,

Equipment

Review

Widescreen Review • Issue 84 • May 2004

Page 3/7

#84 Master Pages 26-49 3/22/04 4:31 PM Page 40

1 2 3 4 5 6 7

Comentários a estes Manuais

Sem comentários

Marantz VP-12S3 Especificações Página 3

Comentários a estes Manuais

Manuais e produtos relacionados com Projetores Marantz VP-12S3