For screen sizes not indicated on the projection tables, use the formulas below.
If the figures on the tables do not match the results of formulas, use the figures in the table.
The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local
building codes.
• All calculations are based on 4:3 aspect ratio.
• Distances are in inches, for millimeters multiply by 25.4.
• Distances may vary ±5%.
Formulas
Units: Inches (for millimeters multiply final number by 25.4)
Definitions:
H = Horizontal Screen Width (4:3)
V = Vertical Screen Height (4:3)
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen top (screen bottom for desktop application)
α = Throw Angle
Projection Formulas:
B = 0.3193H H = Screen Diagonal x 4/5
C (wide) = 1.2996H – 2.325 V = Screen Diagonal x 3/5
C (tele) = 1.5985H – 2.325 Screen Diagonal = H x 5/4
D = 0.0557H
α (wide) = tan
α (tele) = tan
-1
-1
Screen Formulas (4:3):
(B/C(wide))
(B/C(tele))
v 3.0
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(w/lens installed)
Page 1
Page 2
NEC Solutions (America), Inc.
Visual Systems
MT1055/1056 Installation Data
with Optional MT13ZL Short Focus Zoom Lens v 3.0
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mount Installation
9.3"
Screen Top
Lens Ctr
Screen Ctr
Scrn Bottom
D
B
C
Throw Distance
α
5.8"
Lens Offset from
Mounting Pipe
AC IN
@
`
1.7"
Distance Chart
Screen Size
DiagonalWidthHeightwide - telewide - tele
40"32"24"10.2"39.3" - 48.8"1.8"14.6° - 11.8°
60"48"36"15.3"60.1" - 74.4"2.7"14.3° - 11.6°
67"53.6"40.2"17.1"67.3" - 83.4"3.0"14.3° - 11.6°
72"57.6"43.2"18.4"72.5" - 89.8"3.2"14.2° - 11.6°
84"67.2"50.4"21.5"85.0" - 105.1"3.7"14.2° - 11.5°
90"72"54"23.0"91.2" - 112.8"4.0"14.1° - 11.5°
100"80"60"25.5"101.6" - 125.6"4.5"14.1° - 11.5°
120"96"72"30.6"122.4" - 151.1"5.4"14.1° - 11.5°
150"120"90"38.3"153.6" - 189.5"6.7"14.0° - 11.4°
180"144"108"46.0"184.8" - 227.9"8.0"14.0° - 11.4°
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.
BCD
α
Page 2
Page 3
NEC Solutions (America), Inc.
Visual Systems
MT1055/1056 Installation Data
with Optional MT13ZL Short Focus Zoom Lens v 3.0
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Distances are in inches. For millimeters multiply by 25.4.
Desktop Setup
Screen Top
C
Screen Ctr
Lens Ctr
Scrn Bottom
B
D
Throw Distance
α
2.89"
Projector Foot
Distance Chart
Screen Size
DiagonalWidthHeightwide - telewide - tele
40"32"24"10.2"39.3" - 48.8"1.8"14.6° - 11.8°
60"48"36"15.3"60.1" - 74.4"2.7"14.3° - 11.6°
67"53.6"40.2"17.1"67.3" - 83.4"3.0"14.3° - 11.6°
72"57.6"43.2"18.4"72.5" - 89.8"3.2"14.2° - 11.6°
84"67.2"50.4"21.5"85.0" - 105.1"3.7"14.2° - 11.5°
90"72"54"23.0"91.2" - 112.8"4.0"14.1° - 11.5°
100"80"60"25.5"101.6" - 125.6"4.5"14.1° - 11.5°
120"96"72"30.6"122.4" - 151.1"5.4"14.1° - 11.5°
150"120"90"38.3"153.6" - 189.5"6.7"14.0° - 11.4°
180"144"108"46.0"184.8" - 227.9"8.0"14.0° - 11.4°
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.
BCD
α
Page 3
Page 4
NEC Solutions (America), Inc.
Visual Systems
MT1055/1056 Installation Data
with Optional MT13ZL Short Focus Zoom Lens v 3.0
Cabinet Dimensions
The following diagrams show the cabinet dimensions for the MT1055/1056 with optional MT13ZL lens.
Dimensions are in inches. For millimeters multiply by 25.4.
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AC IN@`
2.74
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Page 4
Page 5
NEC Solutions (America), Inc.
Visual Systems
MT1055/1056 Installation Data
with Optional MT13ZL Short Focus Zoom Lens v 3.0
Cabinet Dimensions (continued)
The following diagrams show the cabinet dimensions for the MT1055/1056 with optional MT13ZL lens.
Dimensions are in inches. For millimeters multiply by 25.4.
4
.
0
9
)
4
(
9.49
1
x
M
4
m
m
0
0.787
0.787
∅
10.24
1.18
1.38
∅
5.36
9.45
2.70
2.36
2.36
3.98
Page 5
Page 6
NEC Solutions (America), Inc.
Visual Systems
MT1055/1056 Installation Data
with Optional MT13ZL Short Focus Zoom Lens v 3.0
Ceiling Mount Dimensions (Model #: MTCM)
The following diagrams show ceiling mount dimensions for the MT850/1050/1055/1056.
Dimensions are in inches. For millimeters multiply by 25.4.
Communication Protocol:
Baud Rate: 38400 bps
Data Length: 8 bits
Parity: No Parity
Stop Bit: One bit
X on/off: None
Communications: Full duplex
PC Control Connector (DIN-8P)
To RxD of PC
678
345
12
To GND of PC
NOTE 1: Pins 2, 3, 5, 6 and 8 are used inside the projector.
NOTE 2: For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.
Page 7
To TxD of PC
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