Tektronix 2200 Manual Do Utilizador

2-57

Three forms of control connection to the DPMs are supported. These are

■

CPL (Control Point Language)

■

PBusII (Peripheral Bus II)

■

GPIs

— CPL is the communication protocol used to 

couple the switcher and Kaleidoscope. One of its uses is to convey the 
physical-to-logical channel mapping information described previously. It 
is also used for run control of effects, Aux Bus selection (including front/
back switching) and tally.

When

 is set to 

 in the DPM Setup menu, CPL is 

automatically invoked.

 must be set to 

. 

The 

 selection has a choice of 

 or 

. In normal 

use with Kaleidoscope, this should be set to 

. With this setting, when a 

source button is selected on the Kaleidoscope panel, that source button is 
also selected on the switcher for that Aux Bus, and vice versa. So an effect 
running on Kaleidoscope can cause the switcher to select different 
crosspoints. This is the mechanism used to achieve front/back switching. 
If 

 is set to 

, any CPL requests to change 

crosspoints on an Aux Bus are ignored and Kaleidoscope is unable to 
change sources when running an effect.

All control connections have an associated control delay. For Kaleidoscope 
using CPL, this delay is 6 fields which is selected automatically. 

— PBusII is used for run control of effects 

using triggers. With current software, PBusII triggers are learned into the

 E-MEM level. For example, when using PBusII as the control 

connection for a DPM-700, the following should be set in the DPM Setup 
menu:

 = 

 = 

— Both input and output GPIs may be used as triggers as part of the 

control interface between the DPM and switcher. Depending on the nature 
of the DPM, GPIs can be used for effect recall and run control, source 
selection, and tally information.