Grass Valley 2200 - Manual (Page 81)

4-3
Crosspoint Control Command(s)
Timing and Latency
Any PBCS read command will return a PBCS set command four Þelds after
the command is received. The switcher takes 2 Þelds to fetch the data and
another two Þelds to transmit. This means that data received by the
controlling device is always two Þelds old.
The latency for the PBCS set and trim commands follows the same
speciÞcation as the original commands in this protocol. These will be
executed in the 10
th
Þeld after the command is received.
Crosspoint Control Command(s)
Crosspoint Query Command (V5.3)
This command allows the editor to query a speciÞc bus on the switcher as
to the currently selected crosspoint. The response is a PBCS set command
with one byte of data - the crosspoint selection.
Addressing
Valid effects address for this command are as follows:
There is only one possible subsystem address for this command:
Effects Addresses Assignments
00 PGM-PST Mix System
01 Mix/Effects 1 System
02 Mix/Effects 2 System
03 Mix/Effects 3 System
Subsystem Address Assignments
00 Crosspoint Busses