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5−64 CM 4000 Installation and Operating Manual
PRIMARY (P) AND INDIRECT (I) STATUS INSTRUCTIONS (“SPLIT MNEMONICS”)
While the Switcher Inputs table has provision for only one mnemonic per input name (page 5−47), split switching requires
a different mnemonic for each device selected.
For example, the top portion of Figure 5−49 shows a four−level switcher with a black burst generator connected to input 64
of the video level, a test tone generator connected to input 0 of the audio levels, and a time code generator connected to input
0 of the time code level.
All of these devices are assigned to the single input name “TONE” on the Switcher Inputs table (as shown at [1] ).
The input named TONE is in turn assigned to the command “TEST 2” (this link is shown by the dotted line [2] ). Without
further instructions, the mnemonic for all levels would be “TONE” [3]. However, you might prefer to have “BLK” as a mne-
monic for video and “TC” as a mnemonic for the time code level.
To get the mnemonic “TC” on the time code level, an “I” (Indirect) suffix is entered back on the Switcher Inputs table at [4].
This tells the system to search that level for the “P” (Primary) suffix for that input. This is found at [5]. This Primary entry
is associated with the input named “TC”[6], which in turn is linked to the mnemonic “TC” [7].
A similar technique is used to get the mnemonic “BLK” on the video level.
Note: There can be only one Primary entry per input number within one level of the Switcher Inputs table. How-
ever, within that level, any number of Indirect entries can point to the Primary entry.