Sierra Video Tahoe Series 16 - Manual (Page 37)

Tahoe Series 16
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says that input 5 is to be connected to output 1 on all levels, then a delay of 300
(=200+100) sync intervals is to occur, then input 6 is to be connected to output 1 on all
levels, then a status response is to be returned.
It is generally recommended that the host computer be responsible for timing the initiation
of commands, rather than using this command to do the job. The host computer can
simply send the appropriate commands at the appropriate times. The "P" and "T"
commands described below can aid in ensuring that lengthy connect sequences aren't
delayed due to the time it takes to send them to the router.
“T”: Trigger a Salvo
The command "T" is used to trigger a previously set up salvo (set using the "P" command
above). It must be followed by a register letter from A to Z or a register number from 1 to
256 giving the register to be triggered.
For example, the command:
** TB D180 TC !!
says to trigger salvo register B (same as 2), delay 180 sync intervals, then trigger salvo
register C (same as 3). When the register is triggered, this means that the connect
commands stored in it take effect.
If a salvo is triggered and it attempts to connect a locked output or port, or a disallowed
input/output pair, or a port to itself, the salvo trigger operation is aborted, no crosspoint
changes are performed, and an error is reported: “ERROR Salvo Has Locked Xpts”.
“P”: Preset a Salvo
The command "P" is used to set up a salvo, which is a series of connect commands for
later execution with the "T" command. It must be followed by a register letter from A to Z
or a register number from 1 to 256 giving the register into which the connect sequence is
to be stored, followed by zero or more connect commands (V, W, X, Y, or Z), followed by
a "~" (tilde) character.
Registers A-Z are the same registers as 1-26. The letter designators are allowed to
shorten up the command sequence slightly, so that “T” commands can be sent in
compact form if one of the first 26 registers is used.
For example, the command:
** PB X2,5,0 Z7 ~ !!
says that two connect commands (output 2 to input 5 AFV, and output 1 to input 7 AFV)
are to be stored into salvo register B (i.e. register 2). Another example:
** P239 Y5,7 ~ !!
says that one connect command (output 5 to input 7 AFV) is to be stored in salvo register
239.
Only supported connect commands (those connect commands whose command letters
appear in the "I" command response) may follow the register letter up to the tilde
character. The connect commands do not take effect until the register is triggered using
the "T" command below.
The maximum allowed number of connect commands is determined by the particular
router. In all cases where this command is implemented, there is guaranteed to be space
available to store at least two complete switch matrices AT ONE LEVEL. If more connect
commands are received than there is space available to store them, the error response
string "FULL ERROR Salvo Space Full" is sent to the host, and only the first part of the
salvo is stored. For example:
** FULL ERROR Salvo Space Full !!
says that the salvo request filled memory and the salvo could not be completely stored.