Grass Valley 1200 Operation Manual - Manual (Page 16)

1-4
Section 1— Introduction
Model 1200 Overview
The Model 1200 architecture (Figure 1-1) consists of a single
mix/effects system with two keyers and a downstream keyer.
Video inputs selected on the background crosspoint buses enter a
pair of program and preview mixers. Video and key inputs
selected on the key crosspoint bus are first processed in the keyer
circuits. If effects send mode is off, the keyer outputs go directly
to the mixers, and any aux bus selections go directly to the aux
outputs. If effects send mode is on, the key and fill outputs of one
of the keyers are routed via the aux bus outputs to a DPM, and the
Figure 1-1. Model 1200 Simplified Functional Block Diagram
KEYER CARRIER AND
EFFECTS SEND
MODULE
MIX/EFFECTS
KEYER 1
DOWNSTREAM
KEYER
K
K
K
K
K
K
CROSSPOINT
MODULE
V
PROGRAM BACKGROUND
PRESET BACKGROUND
V
V V
V
EFFECTS
SEND
AND
AUX BUS
SIGNAL
ROUTING
AUX 1
AUX 2
K
K
K
V
V
V
V
P
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•••••••••••• ••••••••••
BORDERLINE
KEY EDGE
GENERATOR
OPTION
BORDERLINE
KEY EDGE
GENERATOR
OPTION
CHROMATTE™
4:2:2/4:4:4 CHROMA
KEY OPTION
SECOND
MIX/EFFECTS
KEYER
OPTION
BORDERLINE
KEY EDGE
GENERATOR
OPTION
SERIAL
INPUT
OPTION
PARALLEL
INPUT
OPTION
SERIAL
INPUT
OPTION
SERIAL
INPUT
OPTION
SERIAL
INPUT
OPTION
PARALLEL
INPUT
OPTION
PARALLEL
INPUT
OPTION
PARALLEL
INPUT
OPTION Note: Digital video/key inputs and outputs may be
either serial or parallel as specified when ordered.