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Crestron C2N-VEQ4 Cresnet 4-Channel Digital Volume Control
Operations Guide - DOC. 6135A Cresnet 4-Channel Digital Volume Control: C2N-VEQ4 • 25
New Symbols
The following new symbols have been created to facilitate programming for audio
devices:
• Analog Ramp (bounds limited) - Many of the values that the C2N-VEQ4
permits are limited to a specific range, such as a gain restriction of
-36dB to +24dB
. The parameters for this symbol would be a lower limit of
360d, and an upper limit of 240d. These values are multiplied by 10, as the
C2N-VEQ4 expects the gain in units of 0.1dB.
• Analog Scaler with I/O Limits - Useful for scaling an analog that goes from
one value to another, to a different range (linearly)
. The "format" is 0d (input
is treated as an unsigned value).
• Log/Antilog with Limits - For example, applying an Analog Ramp (0d to
65535d) yields a logarithmically varying output between the lower and the
upper limits that are specified
. In the C2N-VEQ4, for example, the lower
limit is 5d and the upper limit is 24000d
. (5Hz and 24KHz).
• Analog Increment - Allows you to go from one value to another, in specified
increments
. Also permits a "speed up" of the ramping by specifying a hold
time at which the analog starts to increment at a given rate. If, for example,
you wanted to ramp the gain in steps of 0.5dB, and have it repeat every 0.1s
after holding the button for 1s, you can use one of these symbols with the
following parameters: HoldTime = 1s, RepeatTime = 0.1s, Increment = 5d
(in units of 0.1dB), LowerLimit = -360d, UpperLimit = 240d, MuteLevel =
-360d.
• Analog Scaler with Overflow Handling - Scales the range of values for its
analog input signal to the range defined by the scale factor and minimum
value parameters. The symbol differs from the Analog Scaler symbol in that
it applies the offset before considering any overflow condition.
• Analog Scaler without Zero Pass - Operates identically to the Analog Scaler
symbol, except that it has no "zero pass" feature. That is, when the input is at
0%, the output remains equal to the minimum value and does not mute.
• Analog Increment with Optional Feedback - This symbol generates an
analog value that changes by an incremental amount with each rising edge of
an up or down command. The output value is bounded by LowerLimit and
UpperLimit values. That is, if a rising edge of up will cause the output to
exceed the upper limit value, the output will hold at the upper limit value.
Similarly, when the output reaches the lower limit value, it will hold at the
lower limit value. At startup, the output is set to MuteLevel.
Refer to the SIMPL Windows Help file for additional details.
Example Program
An example program for the C2N-VEQ4 is available from the “Example Program”
section of the Crestron website (http://www.crestron.com/exampleprograms). Search
for C2N-VEQ4 Example Program (ZIP).