Grass Valley NV5256 v.1.8 - Manual (Page 16)

8 Rev 1.8 • 08 Jul 11
2. Introduction
Functions
Machine Control Broadcast
This level type applies only to third-party router control systems. Use this level type if you have a
third-party control system and you want to be able to perform broadcast machine control takes.
DataXY
“DataXY” is a type of physical level on which data flow, much like video and audio signals in a
normal X/Y router. There is no concept of command and response on this type of level.
Port Types
Seven port types are available:
Controlling and Controlled
These port settings fix the direction of the router port to “controlling” or “controlled.” The port’s
connection for Tx and Rx is fixed. This allows the port to be routed as a source or destination while
maintaining, for example, Rx on pins 7 and 2 and Tx on pins 8 and 3.
S Pins for Tx on a controlling machine are 8 and 3. Tx pins for a controlled machine are 7 and 2.
S For more about machine control data, review the SMPTE 207M standard.
DTE
DTE has the same meaning for RS-232 as “controlling” does for RS-422.
DCE
DCE has the same meaning for RS-232 as “controlled” does for RS-422.
Dynamic
A dynamic port can be a controlling or controlled port depending on whether it is connected to a
master port or slave port. The port’s configuration is dynamic and can change during operation.
Dynamic ports are typically assigned to VTRs.
Master
Any dynamic port connected to a “master” port will be a controlled port.
The NV5256 applies logic to the port direction setting when a master port is connected to a
dynamic port. In this case, the machine at the dynamic port is always controlled and the machine at
the master port is always controlling.
A good example is an Avid editor controlling two VTRs.
Slave
“Slave” means the opposite of “master”: any dynamic port connected to a slave port will be a con-
trolling port.
Controlling DTE Master Dynamic
Controlled DCE Slave