Video Supported Modes; Preset Display Modes; Physical Characteristics - Dell ST2421LB User Manual

Resolution
Model
Horizontal scan range
Vertical scan range
Maximum preset resolution

Video Supported Modes

Model
Video display capabilities (HDMI playback)

Preset Display Modes

ST2420L/ST2421L
Display Mode
VGA, 720 x 400
VGA, 640 x 480
VGA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA. 1152 x 864
VESA, 1280 x 1024
VESA, 1280 x 1024
VESA, 1920 x 1080
Electrical
Model
Video input signals
Synchronization input signals
AC input voltage/frequency/current
Inrush iso surge current

Physical Characteristics

Model
Connector type
Signal cable type
ST2420L/ST2421L
30 kHz to 83 kHz (automatic)
56 Hz to 76 Hz (automatic)
1920 x 1080 at 60 Hz
ST2420L/ST2421L
480i/480p/576i/576p/720p/1080i/1080p
Horizontal Frequency Vertical Frequency
(kHz)
31.469
31.469
37.500
37.879
46.875
48.363
60.023
67.500
64.000
79.976
67.500
ST2420L/ST2421L
Analog RGB, 0.7 Volts +/- 5%, positive polarity at 75 ohm input impedance
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
Separate horizontal and vertical synchronizations, polarity-free TTL level, SOG
(Composite SYNC on green)
100 to 240 VAC/50 or 60 Hz + 3 Hz/2.0A (Max.)
120 V: 30 A (Max.)
240 V: 60 A (Max.)
ST2420L/ST2421L
D-sub: Blue connector
l
DVI-D: White connector
l
HDMI
l
D-sub: Detachable, Analog, 15 pin, shipped attached to the monitor
l
DVI-D
l
HDMI
l
Pixel Clock
(Hz) (MHz)
70.087 28.3
59.940 25.2
75.000 31.5
60.317 40.0
75.000 49.5
60.004 65.0
75.029 78.8
75.000 108.0
60.000 108.0
75.025 135.0
60.000 148.5
Sync Polarity (Horizontal/Vertical)
-/+
-/-
-/-
+/+
+/+
-/-
+/+
+/+
+/+
+/+
+/+