Grass Valley Switcher Products - Manual (Page 121)

Switcher Products — Protocols Manual 121
Parameters
Parameters
This appendix outlines those parameters supported for the switcher/DPM
interface. A parameter is a value that may be modified and has lasting state.
Parameters are sent via the SET command. When building a Set command,
the parameter ID, its associated device, and the parameter value must be
specified.
In addition, a parameter’s value may be obtained via the subscription/
issue mechanism.
Table 114 on page 122 is a complete list of the parameters in tabular form.
This list includes the name of each parameter used in this document, the
PID’s numeric value, its associated devices, and the type of each parameter
with its acceptable range. Bytes and chars are 8-bit values, shorts are 16-bit
values, longs are 32-bit values. “s15.16” is a signed 32-bit fixed point value
where 1.0 = 0x00010000 (0.0 = 0x00000000, -1.0 = 0xFFFF0000, 0.5 =
0x00008000, etc.). Boolean is a 16-bit value where true or on = 1 and false or
off = 0. Values are in decimal unless preceded by 0x indicating hexadecimal.
The last two columns indicate who sends and receives which commands
associated with each PID.“Tx” means the device transmits the message;
“Rx” means that device receives the message. “SUB” indicates subscribe
append or replace messages. “SUB-I” indicates subscribe immediate mes-
sages.