Grass Valley Maestro Master Control Reference Manual v.2.4.0 - Manual (Page 27)

MAESTRO — Automation Interface Protocol Technical Reference Manual 27
Transport Medium Characteristics
Transport Medium Characteristics
Serial
The ESbus standard as defined in EBU document Tech 3245-E states, “stan-
dard transmission rate on the interface bus is 38.4 kbit/s”. The supported
transmission rates in Maestro for the serial interface will be 38.4 kbit/s and
115.2 kbit/s and will be configurable through the Maestro Configuration
Editor.
Furthermore, Maestro will conform with the ESbus standard as defined in
EBU document Tech 3245-E which states, “The complete serial data word
consists of one start bit (SPACE), eight data bits (ONE BYTE), a parity bit
(EVEN), and one stop bit (MARK). The least significant bit is transmitted
first.
Determinacy
Execution of received commands as a result of internal processing shall be
frames latent from the frame in which a command is received at the auto-
mation module boundary. This latency only specifies when the command
will be executed. Determinacy of command completion is not guaranteed
where execution involves an indeterminate external element (Router
Control System, Network, etc.). Where possible, the determinacy of
command executions will be specified.
Automation Input Set
The Configuration Editor shall allow the user to specify an Automation
Input Set for a specific channel based upon that channel’s available inputs.
This is necessary to allow the user to specify the available sources (typically
all that are available to the channel) and the order of those sources for auto-
mation. The Automation Input Set shall be independent of the Channel
Input Set with respect to ordering so that Category/Entry changes to the
Channel Input Set do not reorder the Automation Input Set causing an
unexpected inconsistency between Maestro and the Automation system. It
is the responsibility of the Configuration Editor to validate the Automation
Input Set with respect to the Channel Input Set.