Crown Audio IQ-INT3 - Manual (Page 12)

Page 12
IQ-INT 3 IQ Interface
IQ-INT 3 Reference Manual
Figure 3.12 Baud Rate Settings for the IQ-INT 3
IMPORTANT: Be sure to disconnect the AC power
from the unit before changing the communication
standard or parameters.
Setting the baud rate for RS232 serial communication
is accomplished using the four-segment DIP switch
shown in Figure 3.12. Switch settings for all possible
baud rate settings are shown in the table in Figure
3.12. Use the fastest baud rate possible.
IMPORTANT: The communication standard and pa-
rameters of the IQ-INT 3 and the host computer
must be the same. Any mismatch will prevent com-
munication from taking place.
The communication parameters of the host computer
are set automatically by IQ for Windows software.
Please refer to the IQ for Windows documentation for
details.
IMPORTANT: The IQ-INT 3 is compatible with IQ for
Windows, version 5.0 or newer. Older versions of
the software cannot recognize the interface. For the
most current version of IQ for Windows software, visit
www.iqaudiosystems.com.
Here are some important guidelines when configuring
serial communication:
• The IQ-INT 3 should be set at one baud rate
below the host computer (refer to the IQ for
Windows documentation). The IQ-INT 3 can be
set as high as 115.2 K baud. Use the highest
baud rate possible, but be aware that the com-
munication circuitry (UART) in some PC’s
cannot function over 9600 baud. We strongly
recommend using a host computer serial inter-
face with a 16550-compatible UART.
• Do not use twisted-pair wire for RS232 cables
because the unbalanced wiring of RS232 is
susceptible to crosstalk. Instead use an un-
twisted cable, ribbon cable, or a certified
RS232 cable.
• If the host computer fails to communicate or re-
ports communication errors with the IQ-INT 3
and the communication standard and param-
eters are identical, try reducing the baud rate
for the interface and the computer. This may be
especially useful when configuring for commu-
nication via modem. IMPORTANT: The IQ-INT
3 should be set at one baud rate slower than
the modem is set for accurate communica-
tion. (Example: 38.4 K modem, set the IQ INT 3
at 19.2 K.)
• If communication problems persist, check the
serial cable for improper wiring or possible
shorted or broken wires.
• For further assistance, refer to the IQ for
Windows documentation, or contact Crown’s
Technical Support Group.
3.2.2 Baud Rate Setting