11
ENGLISH
ITALIANO
PC (DB9 female)
Matrice (DB9 female)
THE 4 OPERATIVE LEVELS ARE USUALLY SET THIS WAY.
Lev0
(bit 0)
Composite Video / YC / SVGA
Lev1
(bit 1)
Audio
<source>
represents the number of the source channel (from 0 to 3 for this cross point) and
<destination>
represents the number of the output channel (from 0 to 3 for this cross point).
INSTRUCTIONS
The 4 bits most significant of the third byte represents the instruction code.
THE INSTRUCTIONS ARE THE FOLLOWING:
0 - SOURCE SWITCHING ON DESTINATION
If the level L matches with the level on which the switching is wanted, the cross point <source>
on <destination> will be obtained with this instruction. If the switcher accepts the command an
array identical to the one sent will be generated.
If a source number over 3 is used a Blank output situation will be obtained.
AAh 55h 03h
FFh
01h
(to obtain Blank audio and video on output 1)
AAh 55h
02h
FFh
03h
(to obtain Blank audio on output 3)
3 - SENDING THE CROSS POINT DATA WITHOUT SWITCHING
With this instruction it is possible to send a cross point data without having to electronically
execute the switching.
This allows to store the global data of the switcher with 4 type 3 instructions and afterwards to
assign a global switching command with instruction 4.
The cross point will not show an answer once the command has been accepted.
4 - SENDING THE COMMAND OF GLOBAL SWITCHING
With this instruction the FVM 9844 switches at once the 4 cross points stored after the sending
of the data with instruction 3. The cross point will not show an answer once the command has
been accepted.
5 - RETURN OF THE SOURCE NUMBER FOR ANY DESTINATION
With this command the switcher can be asked the current source number on the destination
channel. The request array is the following:
<AAh> <55h> <5L> <00> <destination>
The switcher will answer:
<AAh> <55h> <5L> <source> <destination>
F - Preset recall (memory)
With this command one of the 15 memories in the keyboard can be recalled.
The request array is the following:
<AAh> <55h> <Fxh> <FFh> <FFh>
Where Fxh can be any value from F0h to FEh
