Blackmagicdesign Videohub User Manual

Developer Information
76
In the absence of simultaneous updates, the dialog expected for a simple label change is as follows:
OUTPUT LABELS:↵
6 new output label seven↵
↵
ACK↵
↵
OUTPUT LABELS:↵
6 new output label seven↵
↵
The asynchronous nature of the responses means that a client should never rely on the desired update
actually occurring and must simply watch for status updates from the Videohub Server and use only
these to update its local representation of the server state.
To lock a port, send an update to the port with the character “O” indicating that you wish to lock the
port for example:
SERIAL PORT LOCKS:↵
7 O↵
↵
ACK↵
↵
SERIAL PORT LOCKS:↵
7 O↵
↵
To forcibly unlock a port that has been locked by another client, send an update to the port with the
character "F" instead of using the usual unlock character "U". For example, to override a lock on port 7:
SERIAL PORT LOCKS:↵
7 F↵
↵
ACK↵
↵
SERIAL PORT LOCKS:↵
7 U↵
↵
Hardware status blocks can only be sent by the Videohub Server. If a client sends hardware status blocks,
they will be ignored.

Blackmagicdesign Videohub Specifications

General

Video Input	SDI
Video Output	SDI
Serial Router Control	RS-422
Ethernet Router Control	10/100/1000 Ethernet
Inputs	40
Outputs	40
SDI Bit Depth	10-bit
Power Supply	Internal power supply, 100-240V AC