AVM RS232 Programming Crosspoint Messages (Class 2)
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AVM RS232 Programming Crosspoint Messages (Class 2)
Ramp Times and Slew Rates
The matrix has control over the rate at which a crosspoint changes value. This rate is expressed in
two ways, as a time
(ramp time),
and as a rate of change (
slew rate
).
Ramp Time
Ramp time is expressed in units of milliseconds (1/1000 of a second). You can set ramp times
to any value from 0 -30,000. This corresponds to a range of ramp times from 0 to 30 seconds. The
ramping operation begins as soon as a target value is received. During the ramping time, the output
being ramped rises or falls steadily in volume at a fixed rate.
The rate is dependent on the distance being traversed by the ramp.
Calculating a ramp time:
The ramp time is a 2 byte hexadecimal number. To calculate a ramp time multiply the number
of seconds you want the ramp to take by 1000, and convert the result to hexadecimal. This number is
the value transmitted to the matrix.
Ramp time example:
You wish audio to ramp between states in 5 seconds.
Multiply by 1000, 5 * 1000 = 5000. Convert the number to hexadecimal. 5000 -> 1388h. Use
the result 1388 in the ramp time command. The high byte is 13h and the low byte is 88h.
Individual Audio Crosspoint Data Flow Path -
determines D/A value for crosspoint VCA.
Содержание AVM RS232
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