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page 40
D-8 / Feb 2009
A P P E N D I C E S
Setting Up an Air Tally with the Wheatstone
Bridge Router System
PURPOSE: Use the following procedure to set up an air tally logic output to be
used to trigger an air tally light. All configuration is done using the Wheatstone
XPoint GUI application.
PRELIMINARY: Before beginning the actual procedure you should read it
through first and collect any information you will need to know, such as location of
logic cards, availability of logic ports, signal ID numbers of audio signals that you
want to use for triggering the tally, etc.
STEP 1 — Create a logic destination in the Xpoint matrix:
• this can be done at any unused destination signal ID, preferably below 1000
• for the sake of this discussion we will use signal ID number 1
• in the XPoint matrix right click on the first yellow box at the left under the word
Destinations
• select Modify Signal Definition from the popup menu to see the Signal
Definitions dialog box
• the Id should be 1
• enter a name, such as TheTally
• Destination will already be selected in the Source / Destination radio group
• select Logic I/O Only from the radio group of signal types
• select the Logic I/O (1-6) Tab and put a check under Enabled for LIO 1
(assuming it is not already in use)
• select the Tier, Rack, and Slot where the Logic IO card you will use is located
• select the port you want to use; I’ll use 1 in my example
• set Direction to Out (you use a logic OUTPUT port to provide the tally closure)
• make sure the Invert box is unchecked
• from the drop-down Function list select ST4InUse (corresponds to CR tally in
VDip)
• click Apply
A brief explanation is in order here. There are 4 monitor circuits associated with
the Wheatstone surface: Studio1, Studio2, Headphone, and Control Room. These
appear in the VDip screen as Studio Tally’s 1, 2, HP, and CR. They appear in the
function list, when setting up a logic signal’s function, as ST1InUse, ST2InUse,
ST3InUse, and ST4InUse. This is why you use ST4InUse to set up a Control Room
(CR) tally.
STEP 2 — Create a new crosspoint
Next, create a crosspoint between the Destination just created (TheTally) and the
auto-generated source signal that carries the tally functions for the surface. By auto-
generated sources, we mean sources that are automatically generated by the XPoint
program when a system is configured with one or more surfaces. These signals appear