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HK AVR-325 Manual
RS-232 Port: This jack is used to enable the
AVR 325 to be controlled by an external computer
or programmable remote system that uses RS-232
commands. Due to the complexity of RS-232 connections,
we recommend that they be made by a
trained and qualified custom installer. See page 16
for more information on the RS-232 control port.
Page 16:
RS-232 Connections
The AVR 325 includes an RS-232 serial port connection
that may be used to control the unit via compatible
optional, external keypads or control systems. The
physical connection to the AVR 325 from the control
device is a standard D-9 connection, but to ensure
compatible and proper operation, specific software
commands and pin wiring schemes are required.
Due to the complexity of RS-232 connections,
we recommend that they be made only by trained
installers familiar with their use. To obtain additional
information on the use of the AVR 325 with RS-232
control, please contact Harman Kardon’s customer
service department or consult our Web site at
www.harmankardon.com.
Looks like you're in the same boat as my Yamaha RX-V3000. No software upgrades possible...</font>
