Grass Valley Switcher Products - Manual (Page 9)

Switcher Products — Protocols Manual9
Section
1
Tally Protocol
Introduction
This section describes the tally mechanisms available on the Kalypso and
Kayenne Video Production Center and the Zodiak Digital Production
Switcher systems. These systems (generically called “switcher”) are each
equipped with a classic tally relay system, but also have a serial tally inter-
face to provide more in-depth status than simple on/off air information.
Technical details of the serial tally protocol used to report tally information
are presented later in this section.
Kalypso System Overview
A Kalypso system provides 64 tally relays that close in response to tally sta-
tuses, and an additional 64 relays may be added as an option. The tally
serial port also outputs current system tally information.
Kalypso systems are available in 4-ME and 2-ME models. The MEs are
identical to one another, with one acting as a PGM PST bank. Each ME has
four keyers, two background buses, two utility buses, two preview out-
puts, and four program outputs.
A Kalypso system has 46 programmable system outputs (Outputs 39 and
40 are not programmable). An aux bus output can be configured as a
video/key pair.
The Kalypso Still Store option has two inputs and eight outputs.
Zodiak System Overview
A Zodiak system provides 32 tally relays. The tally serial port also outputs
current system tally information.
Zodiak systems are available in a 3-ME model (three fully functional MEs,
one acting as PGM PST) and a 2.5-ME model (2 MEs and PGM PST). Each
ME has four keyers, two background buses, one utility bus, one preview
output, and one program output. The PGM PST-DSK bank is equipped