Extron Electronics VN-QUANTUM User Guide - Manual (Page 63)

VN-QUANTUM User Guide Section 3: Functional Overview
I455GB issue 8 Page 63
2-Channel RGB Input Card (ES3312)
Card Architecture
The following diagram shows the main functional blocks of the ES3312 card and basic data/signal
flow through the card:
RGB
DECODER
ES3312
RGB Input Card
CONTROL
2
R
G
B
/Y
P
rP
b
I
n
p
u
ts
PCI BUS RAPT BUS
PROCESSING & DOWN-SCALING
Each card can accept 1 or 2 analog RGB graphics sources or HD Video sources (in RGB or
component YPrPb format). The maximum number of ES3312 cards that can be installed is limited
only by the number of available card slots (see table on page 57). With the minimum of one Output
Card fitted:
The ES3301-2 Card Frame can accommodate up to 14 Input Cards,
allowing a maximum of 28 RGB/HD source inputs.
The ES3302 & 3304 Card Frame can accommodate up to 7 Input Cards,
allowing a maximum of 14 RGB/HD source inputs.
For full technical data on the ES3312 Input Card, including connector pin-outs, see page 10101.
Auto-detection of Source Types
Full auto-detection is provided on each input, allowing a wide range of standard source types to be
connected without the need for any further configuration. However, VN-COMMANDER provides the
means to create fixed or custom input modes.
Timebase Correction (Frame Synchronization)
Incoming sources are digitized and then synchronized internally to a specified clock signal derived
from either:
The refresh rate of the display outputs; or
The refresh rate of a designated VIDEO source input (from an ES3311-2 card).
This ensures clean switching between sources without the need for any external source
synchronization.
NOTE: If frame-accurate synchronization is required between some or all sources, these will need to
be synchronized externally.