User`s manual

SIERRA VIDEO
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number of inputs (Nin), a comma, and then the level names, each terminated by a "~"
(tilde), and the last followed by two tildes.
For example, the command:
**L!!
might return the following string:
** L64,3,32,VIDEO~AudioL~AudioR~~ OK !!<CR>
indicating that the router has 64 outputs, 3 levels, and 32 inputs, and the levels are
named "VIDEO", "Audio L", and "Audio R".
“O”: Output Status Inquiry
The command "O" requests that matrix status information for a single output be returned
to the host. The status information is sent as a “Y” command or a “V” command or as a
sequence of L “X” commands, where L=number of levels.
For example, the command:
**O5!!
to a 3-level router might have the following three commands as its response:
** X65,23,1 X5,-,2 X5,0,3 !!
Note the dash, indicating that on level 2, output 65 is not connected to an input. Also note
the 0, indicating that the connection on level 3 is either unknown or that output 65 doesn’t
exist or isn’t mapped on level 3.
Or, a 3-level router might have the following single command as its response:
** V65,23,-,0 !!
which has the same information as the three X commands in the previous example.
If the router has only one level, or if all levels are connected the same, the router might
instead use the Y command. For example:
** Y65,23 !!
“N”: Input Status Inquiry
The command "N" requests that matrix status information for a single input be returned to
the host. This command is only useful on those router levels that allow an input to be
connected to at most one output. The status information is sent as a “Y” command or a
sequence of L “X” commands, where L=number of levels that allow an input to be
connected to at most one output (each such level generates a single “X” command of
status). Thus, a 6-level router with three single-output-per input levels would generate 3
“X” commands of status command output. A router that has all of its levels as single-
output-per-input may return a single “Y” command instead of individual “X” commands if
all of the levels are connected to the same output. The “X” and “Y” commands are
formatted exactly as with the "O" command.
For example, the command:
**N4!!
to a router might have the following three commands as its response:
** X12,4,2 X-,4,3 X0,4,4 !!
giving the status of levels 2, 3, and 4 (level 1 presumably not being a single-output-per-
input level). Note that on level 3 the - (dash) indicates that the input is disconnected, and