Grass Valley Switcher Products - Manual (Page 41)

Switcher Products — Protocols Manual41
Section
2
Editor Protocol
A video editing system uses the switcher editor port to exercise real-time
control over the switcher's functions. The editor is really an external com-
puter that can input and output functions. Such functions select cros-
spoints, perform auto transitions, or perform E-MEM (Effects Memory)
register recalls, to name just a few possibilities. Refer to the appropriate
switcher User Manual for definitions and explanations of switcher func-
tions and features.
Kalypso/Zodiak Editor Protocol
Introduction
This section describes the Editor protocol and its error handling as used by
Kalypso and Zodiak systems. This Kalypso/Zodiak Editor protocol is
based on the Grass Valley Group Model 4000 switcher protocol, used by the
Model 4000, 3000, and 2200 Grass Valley Group switchers, but commands
have been extended to support Kalypso and Zodiak features.
Serial Data Word Description
The serial data word contains eleven bits, as shown in Figure 1 :
Figure 1. Serial Data Word
D
Data, 8 Bits, LSB First
Start Bit, Always Zero Parity Bit
Previous Character's Stop Bit Stop Bit, Always One
Next Character's Start Bit
11 Bits Character Length
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
P
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