Kramer Electronics VP-774AMP - Manual (Page 69)

64 VP-774AMP - The VP-774AMP RS-232 Communication Protocol
12 The VP-774AMP RS-232 Communication
Protocol
The Kramer Protocol lets you control the VP-774AMP from any standard terminal
software (for example, the Windows
®
HyperTerminal Application).
12.1 Using the Communication Protocol
There are three different methods to control the VP-774AMP via the RS-232 or the
Ethernet:

Protocol commands (via protocol 3000 or Legacy Protocol) mimicking the
OSD, see Section 12.2

The button functions mimicking the remote controller buttons (as well as the
front panel buttons), see Section
12.3

Protocol 3000 common commands, see Section 12.4
All three tables together include all the protocol commands, but they
are not identical and do not always include the same information.
Some of the data may appear in one or two of the tables but not in the
third table and vice versa.
The protocol 3000 communications protocol uses a data rate of 115200 baud, with
no parity, 8 data bits, and 1 stop bit.
The Legacy communication protocol uses a data rate of 9600 baud, with no parity,
8 data bits and 1 stop bit. CTS mode and XON/XOFF are set to Off.
Note that if the Protocol is set to Legacy (via the Miscellaneous menu,
see
Section
6.8
), some PC applications (for example, K-Upload), as
well as the Web pages may not function properly.
12.2 Communication Protocol: Mimicking OSD
The audio/video protocol commands defines all the function numbers, their valid
parameters can be used with protocol 3000 or the Legacy protocol.
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