Electronic Theatre Controls Emphasis Lighting Control System Instrukcja Użytkownika Pobierz pdf (Strona 57)

2 Emphasis Console User Interface 47

Channel Concepts in the Emphasis Control System

The Emphasis Control System controls channels using both Highest-Takes-Precedence

(HTP) and Latest-Takes-Precedence (LTP) conventions, and stores information for

channels using both Preset and Tracking conventions. These conventions are described

here so that you can understand the expected behavior of your control channels and cue

playback.

HTP vs. LTP

Emphasis uses two basic channel types – Highest-Takes-Precedence (HTP) channels and

Latest-Takes-Precedence (LTP) channels. In all cases, channels that are parked or

manually controlled by the keypad or through the tools in Emphasis Visualization become

captured and take precedence over any playback controls. See Manual Control, page 86

for more information on selected and captured channels.

HTP

In playback situations, HTP channels will output the level that is highest based on all

channel inputs, like cues and submasters. HTP channels are also referred to as “pile-on”,

because as control inputs are added (you may bring up cues and multiple submasters that

all have a channel recorded at various levels, for example), the system calculates which

input has the highest level for that channel and outputs that level. As control inputs are

taken down (you pull some of those submasters down to zero), the console will adjust the

channel level, if required, to highest remaining level, and so on. Channels that control

dimmers are typically HTP channels.

In cues, HTP channels will always follow the timing of the current cue. It does not matter if

the channel levels are the same from cue to cue. If the fade timing is different from cue to

cue, and you play the next cue before the previous cue completes, the fade time for HTP

channels that are moving will change to the current cue’s fade time.

LTP

LTP channels obey the latest cue command to set their level. They are not affected by

submasters, unless the submaster contains a subroutine (see Subroutines on Submasters

(Subs-on-Subs), page 179). LTP channels can also fade in the background. What this

means is that an LTP channel will always listen to the most recently played cue if it is

moving in that cue. If the channel has the same level in a series of cues, and the first cue

of the series is not allowed to complete before you play back subsequent cues, the channel

will complete its fade in the background in the fade time of the first cue.

Channels levels fading in the background are displayed in purple, and cannot be cleared

from the A/B or C/D faders, since they aren’t really in those faders anymore. You can view

cues running in the background using the Fader display. See Background fades, page 176

for more information on channels in the background.

Independent Channels

Both HTP and LTP channels can also be independent. Independent channels are not

affected by the Grandmaster fader, the Blackout key, and Flash and Solo functions.

Independent channels also have protection from the release command, requiring repeated

key presses to return them to zero or recorded levels. Most frequently, color scrollers and

control parameters on moving light fixtures other than intensity are set as independent

channels. This keeps their moving parts from speeding to full or zero unintentionally when

the Grandmaster, Blackout, Flash and Solo are used.

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