Grass Valley Kayak HD v.6.9.3 - Manual (Page 175)

Kayak — User Manual 175
Config Menus
The On Air Tally (Red Tally) calculations are essential for switcher opera-
tion. This tally calculation forms the basis for On Air indication (panel,
camera tally lights, etc.), and other functions such as external device Auto
Start, Off Air Advance, or router protections. On Air tally calculations nor-
mally start at the Pgm-Pst PGM outputs.
User tally calculations can be used for purposes other than On Air tally.
These tally calculations still trace the video path upstream from the speci-
fied points in the video path, but the starting point does not necessarily
have to be a program output. For example, a Look Ahead tally begins at the
Pgm-Pst Look Ahead Preview (LAP). When a transition is not in progress
this virtual output is not on air.
The Output Tally (Green Tally) calculator indicates which sources con-
tribute to designated outputs. For example, a M/E Iso tally is a user config-
ured Output tally set up to begin at an M/E’s PGM. The tally would
indicate what contributes to the M/E's program outputs but not anything
downstream of it. The tally would be the same whether or not the M/E was
On Air.
The Look Ahead Tally (Yellow Tally) calculator indicates which sources
will be on air if a main transition is performed on the selected level. One
way this can be used is for a second set of tally lamps on a camera to alert
the camera operator that his camera is next to be taken on air. Many control
room monitor walls also include a secondary tally indicator for Look
Ahead.
However, if an M/E is placed downstream of Pgm-Pst, the On Air tally cal-
culation can be configured to start at that M/E's program outputs. If this
situation is planned, it is recommended that AUX buses be set up to
provide the real program outputs for the switcher and the On Air calcula-
tion configured using those AUX buses as the tributaries.
GPO / Tally Configuration
The Config-GPO / Tally menu serves to configure up to 128 channels (32 chan-
nels per M/E). The physical properties of each GPO channels can be
adjusted in the Install-GPO menu.