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ACER S230HL
1.3.2.1 Video Signal Amplitudes:
The video inputs consist of Red, Green and Blue signals each has its own coaxial cable terminated at the
monitor. These video signals are analog levels, where 0V corresponds to black, and 735mV is the
maximum signal amplitude for the respective color. The video signal is terminated with 75 ohms.
1.3.2.2 Video Signal Termination Impedance:
The analog video signal termination shall be 75 ohm +/- 2%.
1.3.2.3 Synchronization (Sync) Signals:
The Horizontal Sync (HS) TTL signal is used to initiate the display of a horizontal line. HS may be either
active high or active low according to the timing. The Vertical Sync (VS) TTL signal is used to initiate the
display of a new frame. VS may be either active high or active low according to the timing.
1.3.2.4 Sync Signal Levels:
The monitor must accept sync signals from both 3.3 and 5 volt TTL logic families. The inputs shall sense a
logic 0 when the input is 0.8 volt or less and shall sense a logic 1 when the input is 2.0 volts or greater. In
addition to these level requirements, there shall also be a minimum of 0.3 volt hysteresis provided for noise
immunity (typically by using a Schmitt Trigger input). That is, the input level at which the monitor actually
detects a logic 0 shall be at least 0.3 volt lower than the level at which it actually detects a logic 1. If the
monitor sync processing circuits were designed with 3.3 volt logic family, then the sync inputs must be 5
volt tolerant.
1.3.2.5 Sync Signal Loading:
TTL input loading shall be equivalent to one TTL input load. When logic 0 is asserted by a sync input, the
maximum current source from any single monitor sync input to the driver is 1.6 mA. When logic 1 is
asserted, the maximum current source from the driver to any single monitor sync input is 400 uA.
1.3.2.6 Abnormal Signal Immunity:
The monitor shall not be damaged by improper sync timing, pulse duration, absence of sync, abnormal
input signal amplitude, or any other anomalous behavior of a graphics card.
1.3.2.7 Digital TMDS Input (DVI signal input):
These video inputs consist of TX0+/- to TX2+/- and CLK+/- signals, each with its own shielded twisted
pair. These video signals are digital levels. Each signal pair is terminated by a normal 100 ohms.
1.3.3 User Controls and Indicators:
1.3.3.1 Power On/Off Switch:
The monitor shall have a power control switch visible and accessible on the front of monitor.
1.3.3.2 Power Indicator LED:
The monitor shall have LED indicators located on the front of the monitor. Table 1 is the LED color for the
power indicator.
1. Product Specification
LED light
Status
Off
Power off
Blue
Power on
Blinking Blue
Standby/power saving
Remark
Signal is alive
No signal
ACER S230HL
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