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66
HP L1740
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3.0
Electrical characteristics
3.1
Interface signals
The input signals can be applied in two different modes:
1). D-shell Analog
Input signal: Video, H-sync, V-sync,
Video: 0.7 V p-p, input impedance, 75 ohm
Sync. : Separate sync
2). Intel DVI Digital
Input signal: Four channel TMDS signals. The digital interface shall be comprised of 2 electrical layer
component: a TMDS interface for low-voltage differential serial encoding of the digital display data(Panel
Link compliant) and a DDC2B electrical interface. Refer to the Digital Display Working Group(DDWG)
"
document, Digital Visual Interface(DVI) Specification, Revision 1.0 for the exact requirements.
3.2
Interface
3.2.1 D-Sub Cable
Length
Connector type
Pin Assignment:
2004-10-01
Alger Huang
TTL level, input impedance 2k2 ohm termination
H-sync
Positive/Negative
V-sync
Positive/Negative
: 1.8 M +/- 50 mm (fixed)
: D-sub male with DDC-2B pin assignments.
Blue connector thumb-operated jack screws
PIN No.
SIGNAL
1
Red video input
2
Green video input
3
Blue video input
4
GND
5
Cable detect
6
Red video GND
7
Green video GND
8
Blue video GND
9
DDC +3.3V or +5V
10
GND
11
GND
12
Serial data line (SDA)
13
H-sync
14
V-sync
15
Data clock line (SCL)
2004-10-01
"
"
8
590
32
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