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Specifications: Dell UltraScan P991 Color Monitor User's Guide
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Specifications: Dell™ UltraScan P991 Color Monitor User's Guide
General CRT Resolution Preset Display Modes Electrical Physical Characteristics Environmental Power Management Modes Pin Assignments Plug and Play Capability
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Model number |
P991 |
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Screen dimensions |
19 inches (17.952-inch viewable image size) |
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Preset display area: |
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Horizontal |
352 ± 5.0 mm |
Vertical |
264 ± 5.0 mm |
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Aperture Grill Pitch |
0.24 (center) - 0.25 (edge) mm |
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Deflection angle |
90° |
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Phosphor type |
P22 |
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Faceplate coating |
Conductive AR coating |
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Horizontal scan range |
30 kHz to 107 kHz (automatic) |
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Vertical scan range |
48 Hz to 120 Hz (automatic) |
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Optimal preset resolution |
1024 x 768 or 1280 x 1024 at 85 Hz |
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Highest preset resolution |
1600 x 1200 at 85 Hz |
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Dell guarantees image size and centering for all preset modes listed in the following table. |
Preset Display Modes |
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Display Mode |
Resolution |
Horizontal Frequency (kHz) |
Vertical Frequency (Hz) |
Pixel Clock (MHz) |
Sync Polarity (Horizontal /Vertical) |
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VGA |
720 x 400 |
31.5 |
70.1 |
28.3 |
-/+ |
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VEGA |
640 x 480 |
31.5 |
59.9 |
25.2 |
-/- |
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VESA® |
640 x 480 |
37.5 |
75.0 |
31.5 |
-/- |
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VESA |
640 x 480 |
43.3 |
85.0 |
36.0 |
-/- |
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VESA |
800 x 600 |
46.9 |
75.0 |
49.5 |
+/+ |
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VESA |
800 x 600 |
53.7 |
85.1 |
56.3 |
+/+ |
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VESA |
1024 x 768 |
60.0 |
75.0 |
78.5 |
+/+ |
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VESA |
1024 x 768 |
68.7 |
85.0 |
94.5 |
+/+ |
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VESA |
1280 x 1024 |
80.0 |
75.0 |
135.0 |
+/+ |
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VESA |
1280 x 1024 |
91.2 |
85.0 |
157.5 |
+/+ |
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VESA |
1600 x 1200 |
93.8 |
75.0 |
202.5 |
+/+ |
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VESA |
1600 x 1200 |
106.0 |
85.0 |
229.5 |
+/+ |
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Video input signals |
analog, 0.7 Vp-p, positive at 75 ohm |
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Synchronization input signals |
separate horizontal and vertical;
TTL level, positive or negative, video composite (sync on green) 0.3 Vp- p. |
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AC input voltage / frequency / current |
100 to 120 VAC / 50 or 60 Hz
220 to 240 VAC / 50 or 60 Hz
1.8 A (RMS) at 100 VAC and
1.0 A (RMS) at 240 VAC |
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Inrush current at 120 V |
50 A |
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Inrush current at 240 V |
80 A |
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Connector type |
15-pin D-subminiature |
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Signal cable type |
attached to monitor |
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Dimensions: |
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Height |
463 mm (18.2 inches) |
Width |
449 mm (17.7 inches) |
Depth |
463 mm (18.2 inches) |
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Weight (monitor only) |
25.8 kg (56 lbs 14 oz) |
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Weight (with packaging) |
29.2 kg (64 lbs 6 oz) |
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Temperature: |
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Operating |
10° to 40°C (40° to 104°F) |
Nonoperating |
-20° to 60°C (-40° to 140°F) |
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Humidity: |
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Operating |
20% to 80% (noncondensing) |
Nonoperating |
5% to 90% (noncondensing) |
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Altitude: |
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Operating |
3,048 m (10,000 ft) |
Nonoperating |
10,675 m (35,000 ft) |
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Thermal dissipation |
410 BTU/hour (Maximum), 325 BTU/hour (Typical) |
Power Management Modes
If you have VESA's DPMS compliance display card or software installed in your PC, the monitor can automatically reduce its power consumption when not in use. If input from keyboard, mouse or other input devices is detected, the monitor will automatically "wake up". The following table shows the power consumption and signaling of this automatic power saving feature:
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Power Management Definition
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VESA's Mode |
Video |
H-sync |
V-sync |
Power Used |
LED color |
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ON |
Active |
Yes |
Yes |
maximum 120W
typical 95W
minimum 50W |
Green |
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Stand-by |
Blanked |
No |
Yes |
6 - 14W |
Green and Orange Alternate |
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Suspend |
Blanked |
Yes |
No |
6 - 14W |
Green and Orange Alternate |
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Active-OFF* |
Blanked |
No |
No |
2 - 3W |
Orange |
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OFF |
N/A |
N/A |
N/A |
0.01 - 0.5W |
OFF |
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NOTE: 0 watt power consumption can only be achieved when the system and the monitor are completely disconnected from the mains. |
This monitor is ENERGY STAR®-compliant and TCO'99 power management compatible.
ENERGY STAR® is a U.S. registered mark. As an ENERGY STAR® Partner, DELL has determined that this product meets the ENERGY STAR® guidelines for energy efficiency.
Pin Assignments
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Pin Number
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15-Pin Side of the Signal Cable
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1 |
Video-Red |
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2 |
Video-Green |
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3 |
Video-Blue |
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4 |
GND |
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5 |
CPU sense |
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6 |
GND-R |
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7 |
GND-G |
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8 |
GND-B |
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9 |
No pin present |
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10 |
GND-sync/self-raster |
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11 |
GND |
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12 |
DDC data |
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13 |
H-sync |
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14 |
V-sync |
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15 |
DDC clock |
You can install the monitor in any Plug and Play-compatible system. The monitor automatically provides the computer system with its Extended Display Identification Data (EDID) using Display Data Channel (DDC) protocols so the system can configure itself and optimize the monitor settings. If desired, the user can select different settings, but in most cases monitor installation is automatic.
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