Electronic Theatre Controls Emphasis Lighting Control System Especificaciones descargar pdf (Pagina 18)

4 Chapter 1 Introduction

Output level conventions

The console uses both a highest level, or pile-on, convention and a last

action convention to determine levels for channels affected by more than

one control. Channels may be defined to operate with either convention.

HTP channels

The behavior of a pile-on channel is defined by the Highest Takes

Precedence (HTP) rule. The console reads all output levels it receives for

an HTP channel and sets that channel to the highest of them. A channel

controlled by a submaster always obeys the HTP rule, but the Blackout

key, Grandmaster control and parked channels all have priority over levels

set from the keypad.

For example, if an HTP channel is included in both a submaster and a cue

that has played back and is in a fader, the console sets the channel at the

higher of the two levels. Or, you may use the keypad to select that

channel and set it to any level, regardless of the levels set either by the

cue or the submaster.

HTP channels in the console are called “normal” channels.

LTP Channels

Channels may also be defined in the console to follow the Latest Takes

Precedence (LTP) rule. An LTP channel obeys the latest command to set

its level. When the command is to fade to a level, an LTP channel can fade

either in a physical fader (in the foreground) or in a background fader. Each

LTP channel has its own background fader.

An LTP channel fades in the foreground if its level moves to a new level

in the next cue. When a channel is fading in the foreground and no change

in that channel is commanded by the next cue, the fade continues in the

background. A cue stops running in the background when the last of its

channels stops fading in the background. Up to 600 cues may run in the

background at once.

For example, consider three cues recorded for channels Chan 1, Chan 2

and Chan 3, all of which are set as LTP channels. The cues contain

percentage levels for these three channels as follows:

Chan 1 Chan 2 Chan 3

Cue 1 25 0 0

Cue 2 25 50 0

Cue 3 50 50 50

• When Cue 1 starts, channel Chan 1 starts fading to level 25 with Cue

1 timing.

• If Cue 2 starts before Cue 1 ends, channel Chan 1 continues fading in

the background with Cue 1 timing and channel Chan 2 starts fading in

the foreground to level 50 with Cue 2 timing.

• If Cue 3 starts before Cue 2 ends, channels Chan 1 and Chan 3 start

fading in the foreground to level 50 with Cue 3 timing; channel Chan

2 continues fading in the background with Cue 2 timing.

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