Dell ST2420LB, ST2421L appendix Resolution, Video Supported Modes, Preset Display Modes, Electrical

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Resolution

Model

ST2420L/ST2421L

 

 

 

 

Horizontal scan range

30 kHz to 83 kHz (automatic)

 

 

 

 

Vertical scan range

56 Hz to 76 Hz (automatic)

 

 

 

 

Maximum preset resolution

1920 x 1080 at 60 Hz

 

 

 

 

 

 

 

Video Supported Modes

Model

ST2420L/ST2421L

Video display capabilities (HDMI playback)

480i/480p/576i/576p/720p/1080i/1080p

Preset Display Modes

ST2420L/ST2421L

Display Mode

Horizontal Frequency

Vertical Frequency

Pixel Clock

Sync Polarity (Horizontal/Vertical)

 

 

(kHz)

(Hz)

(MHz)

 

 

VGA, 720 x 400

31.469

70.087

28.3

-/+

 

VGA, 640 x 480

31.469

59.940

25.2

-/-

 

VGA, 640 x 480

37.500

75.000

31.5

-/-

 

VESA, 800 x 600

37.879

60.317

40.0

+/+

 

VESA, 800 x 600

46.875

75.000

49.5

+/+

 

VESA, 1024 x 768

48.363

60.004

65.0

-/-

 

VESA, 1024 x 768

60.023

75.029

78.8

+/+

 

VESA. 1152 x 864

67.500

75.000

108.0

+/+

 

VESA, 1280 x 1024

64.000

60.000

108.0

+/+

 

VESA, 1280 x 1024

79.976

75.025

135.0

+/+

 

VESA, 1920 x 1080

67.500

60.000

148.5

+/+

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical

Model

ST2420L/ST2421L

 

 

 

 

 

Analog RGB, 0.7 Volts +/- 5%, positive polarity at 75 ohm input impedance

 

Video input signals

Digital DVI-D TMDS, 600mV for each differential line, positive polarity at 50 ohm input

 

impedance

 

 

 

 

HDMI, 600mV for each differential line, 100 ohm input impedance per differential pair

 

 

 

 

Synchronization input signals

Separate horizontal and vertical synchronizations, polarity-free TTL level, SOG

 

(Composite SYNC on green)

 

 

 

 

 

 

AC input voltage/frequency/current

100 to 240 VAC/50 or 60 Hz + 3 Hz/2.0A (Max.)

 

 

 

 

Inrush iso surge current

120 V: 30 A (Max.)

 

240 V: 60 A (Max.)

 

 

 

 

 

 

 

 

 

Physical Characteristics

Model

ST2420L/ST2421L

 

 

 

 

D-sub: Blue connector

Connector type

DVI-D: White connector

HDMI

 

 

 

 

 

D-sub: Detachable, Analog, 15 pin, shipped attached to the monitor

Signal cable type

DVI-D

HDMI

 

 

 

 

Image 8
Contents Dell ST2420L/ST2421L monitor Users Guide Package Contents About Your MonitorProduct Features Identifying Parts and Features Front ViewBack View Front View Front Panel Controls Label DescriptionSide View Bottom ViewBack View Label Description/Use Left SidePin Assignments Monitor SpecificationsPower Management Modes DVI Connector Pin Pin Side of the Connected Signal Number CableFlat Panel Specifications Model ST2420L/ST2421LResolution Preset Display ModesPhysical Characteristics Video Supported ModesMaintenance Guidelines EnvironmentalPlug and Play Capability LCD Monitor Quality & Pixel PolicyCaring for Your Monitor Appendix Setting Up Your Monitor Click Change Display Settings Click Advanced Settings Operating the Monitor Using the Front PanelUsing the On-Screen Display OSD Menu Main Menu for non Analog non VGA Input Brightness Contrast Back Auto Adjust Input Source Auto SelectVGA DVI-D Hdmi Display Settings Page DDC/CI Factory Reset PersonalizeOSD Warning Messages Click Change Display Settings Setting the Maximum ResolutionUsing the Dell Soundbar Optional Using the Tilt TiltSetting Up Your Monitor Dell ST2420L/ST2421L monitor Setting Up the Monitor Attaching the BaseConnecting the Monitor Attaching the Soundbar Optional Removing the Monitor StandSelf-Test Solving ProblemsBuilt-in Diagnostics Common Problems Common Symptoms What You Experience Possible SolutionsProduct-Specific Problems Troubleshooting the Dell Soundbar OptionalBack to Contents