Publication No. 980855 Rev. A 1256 User Manual
EADS North America Test and Services Using the Front-Panel Controls 3-15
display filter masks. Characters extending beyond this limit are
treated with wildcards when the filter mask is applied.
Closing a Path
The 1256 front-panel enables the user to manually close and open
pathnames.
For example, suppose four pathnames have been defined using
the remote interface for a combination of different relays and plug-
in cards – “PATH1”, “PATH2”, “PATH3”, and “PATH4”:
1. Press the top key next to the display. This selects the top
display line so that you can change it. The selection markers
“>” and “<” appear on the line to indicate that it is selected.
Rotate the knob until the top line reads:
>---PATH CONTROL---<
2.
Select line 3 (next to the top line) by pressing the third key.
This allows the pathname to be selected from a list of those
that are presently defined in the 1256 switching system:
---PATH CONTROL---
Select Filter Mask
>PATH1_____________<
Status: Open
3. Rotate the knob until line 3 indicates the desired pathname
(“PATH2” for this example):
---PATH CONTROL---
Select Filter Mask
>PATH2_____________<
Status: Open
4. Press the fourth key to select line 4. Rotate the knob until
the display reads:
---PATH CONTROL---
Select Filter Mask
PATH2_____________
<Set to?: Closed
5. Press the fourth key to confirm the closure of the desired
pathname. The entire path then closes, and the display
indicates the updated status on line 4:
---PATH CONTROL---
Select Filter Mask
PATH2_____________
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