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8. AMP gain
use to limit maximum power output.
2.0
IR and Serial Control
The CA Series of products are designed to be controlled by external devices that are capable of
transmitting IR or serial commands. For example, one could steer IR commands from a Calypso
CW-1000 button panel to a CA-1000 IR input, and use the buttons to control audio channel
selection and volume. Similarly, a Pro I/O or ION controller could transmit IR or serial
commands to a CA-500, CA-1000 or CA-1050 to provide PC-based amplifier or pre-amp control
from PowerPoint, desktop icons or from other graphical interfaces. These tools make it
relatively easy to integrate audio control into a full range of AV presentation applications.
2.1 IR Command Protocol
CA Series devices support libraries of IR codes known as CIRT (Calypso IR Trigger) codes.
There are two distinct sets of CIRT codes, known as CIRT1 and CIRT2, both of which are
derived directly from standard, Sony 12-bit CD player IR commands (model CDP-C715) and re-
encoded as 2-byte hex strings for processing efficiency. All Calypso controllers with on-board
IR learning have the ability to automatically convert the actual 12-bit Sony code into the
corresponding CIRT code.
CIRT1 codes are fixed , in that each code is pre-mapped to a specific CA Series function.
CIRT2 codes are variable , in that an integrator may define a valid CIRT code and then map it
to any CA Series function.
To implement IR control, an external device (e.g., Calypso CW-1000, Pro ION, ION controllers)
must transmit CIRT codes to the CA unit, either through the air to the IR receive window, or
wired directly through the IR input terminal block. As a matter of convenience, CA products are
designed to boost the power of incoming CIRT commands, and re-transmit commands out to
another device. See section 1.2.9 for wiring details.
2.1.1 CIRT1 Codes - Fixed
Each CIRT1 code, shown in the table below, is mapped to a specific CA Series function.
Accordingly, the controlling device may be a Calypso ION, Pro I/O, UT-500 controller or any
other controller or IR transmitter that can be configured to send valid CIRT1 codes.
