CUE smartCUE - Manual (Page 11)

User Manual Interfaces
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5.1.2. IR Control
The IR codes are in fact rather long (for example in comparison with serial string commands). The
typical time duration is about 0.5 sec. During the time of transmitting of the IR code the smartCUE can
not accept further requests to send another IR codes. So please let enough time after each IR
command before requesting to send another one from the same smartCUE.
IR General Troubles
• Please pay attention to find proper position for IR Adapter /s. In many rooms exists rather high
IR background signal – it reduces the receiver sensitivity and so reliability of the control.
• No matter how advanced the remote control, some functions can usually only be initiated from
the front panel of the equipment.
• Another potential problem maker is that remotes are supposed to be used interactively, with
the device itself providing feedback to the user. Hence, they often have some toggling
functions, such as power on/off, as well as incremental functions, such as volume up or down,
some Menu select functions. However, as smartCUE has no way of knowing whether the
device is currently on or off, etc., it is possible for the control system to become out of phase
with the device being controlled. Be aware of this when designing control systems based on
IR remote functions.
• In some cases it can be useful to use light sensing device to read LEDs on the equipment to
determine its current status. The Opto-Input Adapter (CS0103) connected to the Assistant or
Assistant-S can be used for such purposes.
5.1.3. Serial Control
Before using the serial control the communication parameters of the serial port must be set. The
setting command must be executed (typically in Autoexec sequence) prior to using any other serial
command.
5.1.4. MIDI Version
The smartCUE version MIDI is adapted to the special communication speed of 31 250 Baud which is
common for MIDI communication. As concerning functions and programming it is compatible with
standard smartCUE. The only difference is in precision of Baud rate generator for standard
communication speeds which are common for RS-232, RS-422 communications. See table below.
Baud Rate Difference
150 +0.0%
300 +0.0%
600 +0.2%
1 200 +0.2%
2 400 +0.2%
4 800 +0.2%
9 600 -2.4%
19 200 -2.4%
Remark
Theoretically the biggest accessible difference of communication speed should not exceed 4%, but
actual value can be dependent on USART reception algorithm.