Input Signal - Extron electronics RGB-DVI 300 User Manual

Input Signal

Video settings
Signal type — RGB or HDTV component (Y, R-Y, B-Y)
Total pixels — The total number of pixels in a line, including blanking on both sides of the
input active area (active, horizontal sync width, back porch, and front porch). The values can be
adjusted from the default value ±512.
NOTE: The total number of lines per frame, including the blanking above and below the
active area is determined by the input signal and is not user adjustable.
Default values for the detected input resolution for total pixels, active pixels, and active lines are
shown with an asterisk (*) in the on-screen display.
Start — The horizontal start defines the number of pixels in the blanking area to the left of the
active area; the vertical start defines the number of lines above the active area.
NOTE: The vertical and horizontal starts and the active area must be set to frame the active
area of the input signal. If these values are set incorrectly, the scaler may crop trailing
edges (right or bottom) or partially mask the leading edges (left or top).
Active pixels — The number of pixels per line that are inside the active area. The baseline for
the active pixels corresponds to the horizontal resolution of the input signal. The values can be
adjusted from the default value ±512.
NOTE: The active pixels and total pixels adjustments are interactive. Setting one of these
variables may require the other to be adjusted.
Active lines — The number of horizontal lines inside the active area. The baseline for the active
lines corresponds to the vertical resolution of the input signal. The values can be adjusted from
the default value ±256.
Phase — The timing of sampling by the digital scaler. Sampling at the optimum pixel phase
results in a bright, stable output.
NOTE: Total pixels and active pixels must be correctly set before adjusting phase.
EDID Emulation — Emulates EDID on a VGA input to provide timing parameters to a source
such as a PC. To work correctly, each cable and connection between the source and the scaler
VGA input must pass pins 10, 12, and 15. EDID communication is not possible if the input cable
is broken out to BNC cables.
Many VGA sources read EDID only when the device is initially powered on, for example, when a
PC goes through the BIOS POST screen. In these cases, EDID must be set on the scaler before
the VGA source is powered on. By default, the EDID provided by the scaler matches the current
output resolution. Use the EDID SIS command to set a specific EDID other than the current
output resolution.
NOTE: 1920x1080 (also known as 1080p) and 1920x1200 standard blanking PC resolutions
exceed the maximum sampling rate of the scaler (162 MHz). If the standard blanking
version of these rates is applied to the scaler, they are undersampled, leading to soft
output. To overcome this undersampling, set the scaler EDID emulation to 1080p or
1920x1200 before the VGA source is powered on. The scaler EDID provides the source
with reduced blanking times that allow the scaler to sample the input pixel for pixel.
RGB DVI 300 and RGB HDMI 300 (A) • Configuration 8