Tektronix 2200 Manual Do Utilizador

2-54

The system defaults to all Aux Buses being part of the

 E-MEM level. 

When an Aux Bus is configured for use with an external DPM, its settings 
are no longer saved in the

 level but are saved in the relevant

 

level when an E-MEM register is learned. Information (such as Aux Bus 
crosspoint selection) is learned for each DPM on separate E-MEM levels.

In cases where it is not desirable to have an Aux Bus selection learned or 
recalled on the

 level, it is possible to configure the Aux Bus to a 

 level (such as

) and never enable that level. An example 

would be if the Aux Bus were controlled by a Remote Aux panel.

The characteristics of the DPM are configured in the DPM Setup menu. The 
first choice to be made is selection of

 from 

, 

, 

, 

or 

.

The

 of 

 indicates that there is no external DPM device used 

for the particular DPM level. However, it can also be used for cases where 
Aux Buses are assigned to a DPM level, but there is no physical device, no 
return signal, and no control connection (for example, an Aux Bus 
dedicated to feeding a video monitor).

Both 

 and 

are selections for pooled devices.

A pooled device is one which provides acquisition of logical channels from 
a pool of physical channels.

Kaleidoscope is a pooled device. As an example, consider a Kaleidoscope 
having 5 physical channels named A, B, C, D, and E. The pooled channels 
are shared by different users. A user may build a Kaleidoscope effect using 
3 channels. On one day he may acquire physical channels C, D, and E as 
logical channels 1, 2, and 3; on another day he may acquire physical 
channels B, C, and D as logical channels 1, 2, and 3. The same effect will 
perform identically on both configurations since the operator’s view of the 
system is the logical arrangement of channels (1, 2, and 3), not the physical 
channels used.

In systems with multiple DPM channels, it is desirable to have a 
predictable relationship between Aux Buses and DPM channels (for 
example, Aux Bus 1 feeding DPM channel 1, Aux Bus 2 feeding channel 2, 
and so on) and to have a particular switcher crosspoint button always 
select the same DPM channel return input. For a fixed device (such as the 
DPM-700) this relationship is achieved by cabling alone. For a pooled 
device, such as Kaleidoscope, the Model 2200 achieves predictable DPM 
channel routing by maintaining an extra level of mapping between 
physical and logical DPM channels. This mapping, termed Switcher Input 
Routing and Switcher Output Routing, is discussed on the following page.