Ensemble Designs BrightEye NXT 410 Clean HDMI Router - Manual (Page 105)

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BrightEye NXT 410/415/430 Compact Router Installation, Configuration and Operations Guide
GV Performer ASCII Protocol
The Grass Valley Performer ASCII protocol is a serial protocol used by the Performer™ 10 x 1 Routing
Switcher. For installations that already support this protocol, this is a good choice to minimize
programming changes to the automation system.
The implementation of this protocol has been adapted as appropriate to reflect the features in the
BrightEye NXT Router.
Protocol Requirements
• Sources and destinations are numbered starting at 1.
• The BrightEye NXT Router supports source and destination numbers beyond the limit
specified in the original protocol. However, any valid source or destination in the BrightEye
NXT Router can be specified in this implementation of the protocol.
• The maximum byte count for Cmd Data is 251 bytes (FBH).
• Multiple commands may be sent within a single message.
• All digits in messages are ASCII hex digits. For example, a message length specified with a high
digit of ‘1’ and a low digit of ‘2’ represents the hexadecimal number 12H, or decimal 18.
• ASCII hex digits are not case specific. The BrightEye NXT Router will accept upper or lower case
ASCII hex digits.
• All messages begin with a carriage return character (0DH).
• All line feeds (0AH), spaces (20H), and nulls (00H) are ignored within messages, and are not
included in the message length calculation.
• The Performer Switch 1 Address bytes in messages are ignored; however, they must be legal
ASCII hex digits from ‘0’ to ‘F’.
• Errors of any kind (e.g., missing parameters, unexpected characters, out of range values, etc.)
result in discarding the remaining portion of the message at the point of the error.
• The P, C, R, and Q commands are not supported and will be ignored.
• No response is sent from the BrightEye NXT Router because none of the supported commands
require a response.